ROHM BU34TD2WNVX Technical data

CMOS LDO Regulators for Portable Equipments

1ch 200mA
CMOS LDO Regulators

BU□□TD2WNVX series

●Description

BUTD2WNVX series is high-performance FULL CMOS regulator with 200-mA output, which is mounted on micro
miniature package SSON004X1010 (1.0 mm  1.0 mm  0.6 mm). It has excellent noise characteristics and load
responsiveness characteristics despite its low circuit current consumption of 35µA. It is most appropriate for various
applications such as power supplies for logic IC, RF, and camera modules. Micro miniature SSON004X1010 with built-in
heatsink is adopted for the package, which contributes to the space-saving design of the set.

●Features

1) High-accuracy output voltage of 1% (25 mV on Vout<2.5V products)

2) High ripple rejection: 70 dB (Typ., 1 kHz,)

3) Compatible with small ceramic capacitor (CIN=Co=0.47 µF)

4) Low current consumption: 35 µA

5) ON/OFF control of output voltage

6) With built-in overcurrent protection circuit and thermal shutdown circuit

7) With built-in output discharge circuit

8) Adopting ultra-small package SSON004X1010

●Applications

Battery-powered portable equipment, etc.

●Line up

■200 mA BU□□TD2WNVX Series

Product Name 1.0 1.2 1.5 1.8 1.85 1.9 2.0 2.05 2.1 2.3 2.5 Package

No.11020ECT07

BU□□TD2WNVX

Model name：BU□□

Symbol

a

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○

SSON004X1010 2.6 2.7 2.8 2.85 2.9 3.0 3.1 3.2 3.3 3.4

○ ○ ○ ○ ○ ○ ○ ○ ○ ○

TD2WNVX

a

Contents

Specification of output voltage

□□

10 1.0 V(Typ.) 20 2.0 V(Typ.) 27 2.7 V(Typ.) 32 3.2 V(Typ.)

12 1.2 V(Typ.) 2A 2.05 V(Typ.) 28 2.8 V(Typ.) 33 3.3 V(Typ.)

15 1.5 V(Typ.) 21 2.1 V(Typ.) 2J 2.85 V(Typ.) 34 3.4 V(Typ.)

18 1.8 V(Typ.) 23 2.3V(Typ.) 29 2.9 V(Typ.)

1J 1.85 V(Typ.) 25 2.5 V(Typ.) 30 3.0 V(Typ.)

19 1.9 V(Typ.) 26 2.6 V(Typ.) 31 3.1 V(Typ.)

Output voltage

(V)

□□

Output voltage

(V)

□□

Output voltage

(V)

□□

Output voltage

(V)

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© 2011 ROHM Co., Ltd. All rights reserved.

1/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Absolute maximum ratings

Parameter Symbol Ratings Unit

Maximum applied power voltage VMAX -0.3 ~ +6.5 V

Technical Note

Power dissipation Pd 560

(*1)

mW

Maximum junction temperature TjMAX +125 ℃

Operational temperature range Topr -40 ~ +85 ℃

Storage temperature range Tstg -55 ~ +125 ℃

(*1) When PCB (70 mm  70 mm, thickness 1.6-mm glass epoxy) a standard ROHM board is implemented.
Reduced to 5.6 mW/℃ when used at Ta=25℃ or higher.

●Recommended operating range (Do not exceed Pd.)

Parameter Symbol Ratings Unit

Input power supply voltage VIN 1.7 ~ 5.5 V

Maximum output current IMAX 200 mA

●Recommended operating conditions

Parameter Symbol

Ratings

Min. Typ. Max.

Unit Conditions

Input capacitor CIN 0.22

Output capacitor CO 0.22

(*2) Set the capacity value of the capacitor so that it does not fall below the minimum value, taking temperature characteristics,
DC device characteristics, and change with time into consideration.

(*2)

0.47 － µF A ceramic capacitor is recommended.

(*2)

0.47 － µF A ceramic capacitor is recommended.

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© 2011 ROHM Co., Ltd. All rights reserved.

2/41

2011.07 - Rev.C

BU□□TD2WNVX series

Technical Note

●Electrical characteristics(Ta=25℃, VIN=VOUT+1.0V

Parameter Symbol

(*3)

, STBY=VIN, CIN=0.47μF, CO=0.47μF, unless otherwise noted.)

Limits

Min. Typ. Max.

Unit Conditions

Overall Device

Output Voltage VOUT

VOUT

×0.99

VOUT

-25mV

VOUT

VOUT

×1.01

VOUT

+25mV

IOUT=10µA,VOUT≧2.5V

V

IOUT=10µA,VOUT＜2.5V

Operating Current IIN - 35 60 µA IOUT=0mA

Operating Current (STBY) ISTBY - - 1.0 µA STBY=0V

Ripple Rejection Ratio RR 45 70 - dB VRR=-20dBv,fRR=1kHz,IOUT=10mA

- 280 540 mV

- 260 500 mV

Dropout Voltage VSAT

- 240 460 mV

- 220 420 mV

Line Regulation VDL - 2 20 mV

2.5V≦VOUT≦2.6V
(VIN=0.98*VOUT,IOUT=200mA)

2.7V≦VOUT≦2.85V
(VIN=0.98*VOUT,IOUT=200mA)

2.9V≦VOUT≦3.1V
(VIN=0.98*VOUT,IOUT=200mA)

3.2V≦VOUT≦3.4V
(VIN=0.98*VOUT,IOUT=200mA)

VIN=VOUT+1.0V to 5.5V
IOUT=10µA

(*4)

Load Regulation VDLO - 10 80 mV IOUT=0.01mA to 100mA

Over-current Protection (OCP)

Limit Current ILMAX 220 400 700 mA Vo=VOUT*0.95

Short Current ISHORT 20 70 150 mA Vo=0V

Standby Block

Discharge Resistor RDSC 20 50 80 Ω VIN=4.0V, STBY=0V, VOUT=4.0V

STBY Pin Pull-down Current ISTB 0.1 0.6 2.0 µA STBY=1.5V

ON VSTBH 1.2 - 5.5 V

STBY Control Voltage

OFF VSTBL -0.3 - 0.3 V

* This product does not have radiation-proof design.
(*3) VIN=2.5V for VOUT≦1.5V
(*4) VIN=2.5V to 5.5V for VOUT≦1.5V

●Electrical characteristics
(Ta=25℃, STBY=VIN, CIN=0.47μF, Co=0.47μF, unless otherwise noted.)

Parameter Symbol

of each Output Voltage

Limits

Min. Typ. Max.

80 160 -

Unit Conditions

VIN=1.7V

1.2V
200 - - VIN=2.1V

1.5V

Maximum

output current

1.8V 200 - - VIN=2.4V

1.9V 200 - - VIN=2.5V

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© 2011 ROHM Co., Ltd. All rights reserved.

60 120 - VIN=1.8V

mA

200 - - VIN=2.2V

3/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Block diagram, recommended circuit diagram, and pin configuration diagram
BU□□TD2WNVX

VIN

Cin

VSTBY

VIN

4

VREF

2

GND

STBY

3

Recommended ceramic capacitor for Cin & Co
Murata Manufacturing Co., Ltd.
GRM188B11A474KA61D

OCP

TSD

STBY

Fig.1 Recommended circuit diagram

Discharge

VOUT

1

VOUT

Co

PIN No. Symbol Function

1 VOUT

2 GND

3 STBY

4 VIN

●Input / Output terminal equivalent circuit schematic

1pin (VOUT) 2pin (GND) 3pin (STBY) 4pin (VIN)

Technical Note

Voltage output

Grounding

ON/OFF control of output voltage
(High: ON, Low: OFF)

Power input

Fig.2 Input/Output equivalent circuit

●About input/output capacitor

It is recommended to place a capacitor as close as possible to
the pins between the input terminal and GND or between the
output terminal and GND.
The capacitor between the input terminal and GND becomes
valid when source impedance increases or when wiring is long.
The larger the capacity of the output capacitor between the
output terminal and GND is, the better the stability and
characteristics in output load fluctuation become.
However, please check the status of actual implementation.
Ceramic capacitors generally have variation, temperature
characteristics, and direct current bias characteristics and the
capacity value also decreases with time depending on the
usage conditions. It is recommended to select a ceramic
capacitor upon inquiring about detailed data of the related
manufacturer.

●About the equivalent series resistance (ESR) of a ceramic capacitor

Capacitors generally have ESR (equivalent series resistance)
and it operates stably in the ESR-IOUT area shown on the right.
Since ceramic capacitors, tantalum capacitors, electrolytic
capacitors, etc. generally have different ESR, please check the
ESR of the capacitor to be used and use it within the stability
area range shown in the right graph for evaluation of the actual
application.

Capacity value of ceramic capacitor - DC bias characteristics

10

0

-10

-20

-30

-40

-50

-60

-70

Capacitance Change [%]

-80

-90

-100

10-V wit hstand voltag e
F char acter isti cs

00.511.522.533.54

Example

(

)

10-V withstand voltag e
F char acteri sti cs

DC Bias Voltage [V]

10-V wit hstand volt age
B charac teri stic s

4-V withstand voltag e
X6S characteristics

Fig.3 Capacity – bias characteristics

Cout=0.47μF ,CIN=0.47μF ,Temp=+25℃

100

Unstable region

10

1

ESR [Ω]

ESR　[Ω]

0.1

Stable region

0.01

0 50 100 150 200

IOUT [mA ]

Fig.4 Stability area characteristics (Example)

10-V withstand voltag e
B1charac teri sti cs
GRM18 8B11A105KA61D

6.3-V wi thstand volta ge
B charac teri stic s

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© 2011 ROHM Co., Ltd. All rights reserved.

4/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Reference data BU12TD2WNVX (Ta=25℃ unless otherwise specified.)

1.4

Temp=25°C

1.2

1.0

0.8

0.6

0.4

Output Voltage (V)

0.2

0.0

00.511.522.533.544.555.5

Io=0uA
Io=1 00uA
Io=50mA
Io=200mA

Input Voltage (V)

VIN= STBY

1.25

Temp=25°C

1.24

1.23

1.22

1.21

1.20

1.19

1.18

Output Voltage (V)

1.17

1.16

1.15

1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2

Io=0uA
Io=1 00uA
Io=50mA
Io=200mA

Input Voltage (V)

Fig.5. Output Voltage

Fig.6. Line Regulation

1.6

1.4

1.2

1.0

0.8

0.6

0.4

STBY Pin Cu rr ent ( uA)

0.2

0.0

00.511.522.5 33.544.555.5

Temp=25°C

Temp=85°C

Temp= -40°C

Input Voltage (V)

100

VIN= 2.5V

STBY= 1.5V

80

60

40

Gnd Curr ent (uA)

20

0

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=-40°C

Temp=25°C

Output Current (A)

Fig.8. VSTBY - ISTBY

Fig.9. IOUT - IGND Fig.10. Load Regulation

1.4
Temp=25°C

1.2

1.0

VIN=1.7V

0.8

0.6

0.4

Output Voltage (V)

0.2

0.0

0 0.1 0.2 0.3 0.4 0.5 0.6

VIN=5.5V

Output Current (A)

VIN=2.5V

STBY= 1.5V

1.5

VIN= 2.5V

Io=0mA

1.0

0.5

Output Voltage (V)

0.0

Temp=25°C

Temp=85°C

00.511.5

STBY V oltage (V )

Fig.11. OCP Threshold

Fig.12. STBY Threshold

60

VIN =2.5V

STBY=1.5V

50

Io=0mA

40

30

20

Gnd Cur rent (uA)

10

0

-40 -15 10 35 60 85

Temp ( °C)

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Gnd Curr ent (uA)

0.2

0.1

0.0

-40 -15 10 35 60 85

Temp ( °C)

Fig.14. IGND vs Temp Fig.15. IGND - Temp (STBY)

VIN= STBY

Temp=-40°C

VIN= 2.5V
STBY=0V

Technical Note

100

Io=0uA

80

60

40

Gnd Current (uA)

20

0

00.511.522.533.544.555.5

Input Voltage (V )

Fig.7. Circuit Current IGND

1.25

VIN= 2.5V

1.24
STBY=1.5V

1.23

1.22

1.21

1.20

1.19

1.18

Output Voltage ( V)

1.17

Temp=-40°C

1.16

1.15

0 0. 05 0.1 0.15 0.2

Output Current (A)

1.25

VIN= 2.5V

1.24
STBY=1.5V

1.23

Io=0.1mA

1.22

1.21

1.20

1.19

1.18

Output Voltage (V)

1.17

1.16

1.15

-40 -15 10 35 60 85

Fig.13. VOUT - Temp

Temp=25°C

Temp ( °C)

Temp=85°

Temp=25°C

Temp=-40°C

VIN= STBY

Temp= 85°C

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5/41

2011.07 - Rev.C

BU□□TD2WNVX series

p
g

(

)

p

(

)

p

g

(

)

p

(

)

●Reference data BU12TD2WNVX (Ta=25 ℃unless otherwise specified.)

IOUT=0mA→50mA

V
e

ut Volta

Out

1.25

1.20

1.15

1.10

Output Current (mA)

100

50

0

Fig.16. Load Response

IOUT=0mA→100mA

1.25

1.20

1.15

Output Voltage (V)

1.10

Output Current (mA)

100

50

0

Fig.18. Load Response

IOUT=0mA→200mA

1.30

1.20

1.10

Output Voltage (V)

1.00

Output Current (mA)

200

100

0

Fig.20. Load Response

IOUT=50mA→100mA

1.25

1.20

1.15

Output Voltage (V)

1.10

Output Current (mA)

100

50

0

Technical Note

IOUT=50mA→0mA

1.30

1.25

1.20

Output Voltage (V)

1.15

Fig.17. Load Response

IOUT=100mA→0mA

1.30

1.25

1.20

Output Voltage (V)

1.15

Fig.19. Load Response

IOUT=200mA→0mA

1.40

1.30

1.20

Output Voltage (V)

1.10

Fig.21. Load Response

IOUT=100mA→50mA

1.25

V
e

1.20

1.15

ut Volta

Out

1.10

Out

100

ut Current

50

mA

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Out

ut Current

100

50

mA

0

Fig.22. Load Response

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6/41

Fig.23. Load Response

2011.07 - Rev.C

BU□□TD2WNVX series

●Reference data BU12TD2WNVX (Ta=25℃ unless otherwise specified.)

STBY=0→1.5V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.24. Start Up Time

Iout=0mA

VIN=STBY=0→2.5V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

4.0

2.0

0.0

Fig.26. Start Up Time

(VIN=STBY) Iout=0mA

STBY=1.5→0V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.28. Discharge Time

Technical Note

STBY=0→1.5V

2.0

1.0

0.0

Output Voltage (V)

Fig.25. Start Up Time

Iout=200mA

VIN=STBY=0→2.5V

2.0

1.0

0.0

Output Voltage (V)

Fig.27. Start Up Time

(VIN=STBY) Iout=200mA

VIN=2.5V→3.5V→2.5V

1.21

1.20

1.19

Output Voltage (V)

1.18

Fig.29. VIN Response

STBY Voltage (V)

2.0

1.0

0.0

STBY Voltage (V)

4.0

2.0

0.0

Input Voltage (V)

4.5

3.5

2.5

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7/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Reference data BU15TD2WNVX (Ta=25℃ unless otherwise specified.)

2.0

Temp=25°C

1.8

1.6

1.4

1.2

1.0

0.8

0.6

Output Voltage (V)

0.4

0.2

0.0

00.511.522.533.544.555.5

Io=0uA
Io=100uA
Io=50mA
Io=200mA

Input Voltage (V)

1.55

Temp=25°C

1.54

1.53

1.52

1.51

1.50

1.49

1.48

Output Voltage (V)

1.47

1.46

1.45

1.41.51.61.71.81.9 2 2.1

Io=0uA
Io=1 00uA
Io=50mA
Io=200mA

Input Voltage (V )

Fig.30. Output Voltage

Fig.31. Line Regulation

1.6

1.4

1.2

1.0

0.8

0.6

0.4

STBY Pin Curr ent ( uA)

0.2

0.0

00.511.522.5 33.544.555.5

Temp=25°C

Temp=85°C

Temp= -40°C

Input Voltage (V)

100

VIN= 2.5V

STBY= 1.5V

80

60

40

Gnd Curr ent (uA)

20

0

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=-40°C

Temp=25°C

Output Current (A )

Fig.33. VSTBY - ISTBY

Fig.34. IOUT - IGND

2.0

Temp=25°C

1.8

1.6

1.4

Output Voltage (V)

VIN=2.0V

1.2

1.0

0.8

0.6

0.4

0.2

0.0

0 0.10.20.30.40.50.6

Output Current (A )

VIN=2.5V

VIN=5.5V

STBY=1.5V

2.0

VIN= 3.8V

Io=0mA

1.5

1.0

0.5

Output Voltage (V)

0.0

Temp=25°C

Temp=85°C

00.511.5

STBY V oltage (V)

Fig.36. OCP Threshold

Fig.37. STBY Threshold Fig.38. VOUT - Temp

60

VIN= 2.5V

STBY=1.5V

50

Io=0mA

40

30

20

Gnd Current (uA)

10

0

-40 -15 10 35 60 85

Temp ( °C)

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Gnd Curr ent (uA)

0.2

0.1

0.0

-40 -15 10 35 60 85

Temp ( °C)

Fig.39. IGND vs Temp

Fig.40. IGND vs Temp (STBY)

VIN= STBY

Temp=-40°C

VIN= 2.5V
STBY=0V

Technical Note

100

IO=0uA VIN= STBY

80

60

40

Gnd Curr ent (uA)

20

0

00.511.522.533.544.555.5

Fig.32. Circuit Current IGND

1.55

1.54

1.53

1.52

1.51

1.50

1.49

1.48

Output Voltage (V)

1.47

1.46

1.45

0 0.05 0.1 0.15 0.2

Fig.35. Load Regulation

1.55

1.54

1.53

1.52

1.51

1.50

1.49

1.48

Output Voltage (V)

1.47

1.46

1.45

-40 -15 10 35 60 85

VIN= 2.5V

STBY=1.5V

Temp=-40°C

VIN= 2.5V

STBY=1.5V

Io=0.1mA

Input Voltage (V)

Temp=25°C

Temp=85°C

Output Current (A)

Temp ( °C)

Temp= 85°C

Temp= 25°C

Temp= -40°C

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8/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU15TD2WNVX (Ta=25℃ unless otherwise specified.)

V
e

ut Volta

Out

1.55

1.50

1.45

1.40

IOUT=0mA→50mA

Output Current (mA)

100

50

0

Fig.41. Load Response

IOUT=0mA→100mA

1.55

V
e

1.50

1.45

ut Volta

Out

1.40

Output Current (mA)

100

50

0

Fig.43. Load Response

IOUT=0mA→200mA

V
e

ut Volta

Out

1.60

1.50

1.40

1.30

Output Current (mA)

200

100

0

Fig.45. Load Response

IOUT=50mA→100mA

V
e

ut Volta

Out

1.55

1.50

1.45

1.40

Output Current (mA)

100

50

0

Fig.47. Load Response

V
e

ut Volta

Out

Technical Note

Output Current (mA)

IOUT=50mA→0mA

1.60

1.30

V
e

1.55

1.25

1.50

1.20

ut Volta

Out

1.45

Output Voltage (V)

1.15

Fig.42. Load Response

IOUT=100mA→0mA

1.60

V
e

1.55

1.50

ut Volta

Out

1.45

Fig.44. Load Response

IOUT=200mA→0mA

1.70

1.60

1.50

1.40

Fig.46. Load Response

IOUT=100mA→50mA

1.60

V
e

1.55

1.50

ut Volta

Out

1.45

Fig.48. Load Response

Output Current (mA)

100

100

50

50

0

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Output Current (mA)

100

50

0

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© 2011 ROHM Co., Ltd. All rights reserved.

9/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Reference data BU15TD2WNVX (Ta=25℃ unless otherwise specified.)

STBY=0→1.5V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.49. Start Up Time

Iout=0mA

VIN=STBY=0→2.5V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

4.0

2.0

0.0

Fig.51. Start Up Time

(VIN=STBY) Iout=0mA

STBY=1.5→0V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.53. Discharge Time

Technical Note

STBY=0→1.5V

2.0

1.0

0.0

Output Voltage (V)

Fig.50. Start Up Time

Iout=200mA

VIN=STBY=0→2.5V

2.0

1.0

0.0

Output Voltage (V)

Fig.52. Start Up Time

(VIN=STBY) Iout=200mA

VIN=2.5V→3.5V→2.5V

1.51

1.50

1.49

Output Voltage (V)

1.48

Fig.54. VIN Response

STBY Voltage (V)

2.0

1.0

0.0

STBY Voltage (V)

4.0

2.0

0.0

Input Voltage (V)

4.5

3.5

2.5

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© 2011 ROHM Co., Ltd. All rights reserved.

10/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Reference data BU18TD2WNVX (Ta=25℃ unless otherwise specified.)

2.0

Temp=25°C

1.8

1.6

1.4

1.2

1.0

0.8

0.6

Output Voltage (V)

0.4

0.2

0.0

00.511.522.533.544.555.5

Io=0uA
Io=100uA
Io=50mA
Io=200mA

Input Voltage (V)

VIN= STBY

1.85

Temp=25°C

1.84

1.83

1.82

1.81

1.80

1.79

1.78

Output Voltage (V)

1.77

1.76

1.75

1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5

Io=0uA
Io=1 00uA
Io=50mA
Io=200mA

Input Voltage (V)

Fig.55. Output Voltage

Fig.56. Line Regulation

1.6

1.4

1.2

1.0

0.8

0.6

0.4

STBY Pin Curr ent ( uA)

0.2

0.0

00.511.522.5 33.544.555.5

Temp=25°C

Temp=85°C

Temp= -40°C

Input Voltage (V)

100

VIN= 2.8V

STBY=1.5V

80

60

40

Gnd Current (uA)

20

0

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=-40°C

Temp=25°C

Output Current (A)

Fig.58. VSTBY - ISTBY

Fig.59. IOUT - IGND

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

Output Voltage (V)

0.4

0.2

0.0

VIN=5.5V

0.00.10.20.30.40.50.6

Output Current (mA)

VIN=2.8V

VIN=2.3V

Temp=25°C

STBY=1.5V

2.0

VIN= 3.8V

Io=0mA

1.5

1.0

0.5

Output Voltage (V)

0.0

Temp=25°C

Temp=85°C

0 0.5 1 1.5

STBY Voltage (V )

Fig.61. OCP Threshold

Fig.62. STBY Threshold

60

VIN= 2.8V

STBY=1.5V

50

Io=0mA

40

30

20

Gnd Current (uA)

10

0

-40 -15 10 35 60 85

Temp ( °C)

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Gnd Current (uA)

0.2

0.1

0.0

-40 -15 10 35 60 85

Temp ( °C)

Fig.64. IGND - Temp Fig.65. IGND - Temp (STBY)

VIN=ST BY

Temp=-40°C

VIN= 2.8V
STBY=0V

Technical Note

100

Io=0uA

80

60

40

Gnd Current (uA)

20

0

00.511.522.533.544.555.5

Fig.57. Circuit Current IGND

1.85

1.84

1.83

1.82

1.81

1.80

1.79

1.78

Output Voltage (V)

1.77

1.76

1.75

0 0.05 0.1 0.15 0.2

Fig.60. Load Regulation

1.85

1.84

1.83

1.82

1.81

1.80

1.79

1.78

Output Voltage (V)

1.77

1.76

1.75

-40 -15 10 35 60 85

Input Voltage (V)

Temp= 25°C

Temp=85°C

Temp=-40°C

Output Current (A)

Temp ( °C)

Fig.63. VOUT - Temp

VIN= STBY

Temp= 85°C

Temp= 25°C

Temp= -40°C

VIN= 2.8V

STBY=1.5V

VIN= 2.8V

STBY=1.5V

Io=0.1mA

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© 2011 ROHM Co., Ltd. All rights reserved.

11/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p
g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU18TD2WNVX (Ta=25℃ unless otherwise specified.)

V
e

ut Volta

Out

IOUT=0mA→50mA

1.85

1.80

1.75

1.70

Output Current (mA)

100

50

0

Fig.66. Load Response

V
e

ut Volta

Out

IOUT=0mA→100mA

1.85

1.80

1.75

1.70

Output Current (mA)

100

50

0

Fig.68. Load Response

V
e

ut Volta

Out

1.90

1.80

1.70

1.60

IOUT=0mA→200mA

Output Current (mA)

200

100

0

Fig.70. Load Response

IOUT=50mA→100mA

V
e

ut Volta

Out

1.90

1.80

1.70

1.60

Output Current (mA)

100

50

0

Fig.72. Load Response

Technical Note

IOUT=50mA→0mA

1.90

V
e

1.85

1.80

ut Volta

Out

1.75

VIN=2.8V
STBY=1.5V
COUT=0.47uF

Fig.67. Load Response

IOUT=100mA→0mA

1.90

V
e

1.85

1.80

ut Volta

Out

1.75

VIN=2.8V
STBY=1.5V
COUT=0.47uF

Fig.69. Load Response

IOUT=200mA→0mA

2.00

V
e

1.90

1.80

ut Volta

Out

1.70

VIN=2.8V
STBY=1.5V
COUT=0.47uF

Fig.71. Load Response

IOUT=100mA→50mA

1.85

V
e

1.80

1.75

ut Volta

Out

1.70

Fig.73. Load Response

VIN=2.8V
STBY=1.5V
COUT=0.47uF

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Output Current (mA)

100

50

0

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© 2011 ROHM Co., Ltd. All rights reserved.

12/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Reference data BU18TD2WNVX (Ta=25℃ unless otherwise specified.)

STBY=0→1.5V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.74. Start Up Time

Iout=0mA

VIN=STBY=0→2.8V

STBY Voltage (V)

4.0

2.0

0.0

2.0

1.0

0.0

Output Voltage (V)

2.0

1.0

0.0

Output Voltage (V)

Fig.76. Start Up Time

(VIN=STBY) Iout=0mA

Iout=0mA

STBY=1.5→0V

STBY Voltage (V)

2.0

1.0

0.0

Fig.78. Discharge Time

Technical Note

STBY=0→1.5V

2.0

1.0

0.0

Output Voltage (V)

Fig.75. Start Up Time

Iout=200mA

VIN=STBY=2.8→0V

2.0

1.0

0.0

Output Voltage (V)

Fig.77. Start Up Time

(VIN=STBY) Iout=200mA

VIN=2.8V→3.8V→2.8V

1.81

1.80

1.79

Output Voltage (V)

1.78

Fig.79. VIN Response

STBY Voltage (V)

2.0

1.0

0.0

STBY Voltage (V)

4.0

2.0

0.0

Input Voltage (V)

4.8

3.8

2.8

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13/41

2011.07 - Rev.C

BU□□TD2WNVX series

)

●Reference data BU19TD2WNVX (Ta=25℃ unless otherwise specified.)

2.0

Temp=25°C

1.8

1.6

1.4

1.2

1.0

0.8

0.6

Output Voltage (V)

0.4

0.2

0.0

0 0.5 1 1.5 2 2.5 3 3 .5 4 4.5 5 5.5

Io=0uA
Io=100uA
Io=50mA
Io=200mA

Input Voltage (V)

Fig.80. Output Voltage Fig.81. Line Regulation

1.95

Temp=25°C

1.94

1.93

1.92

1.91

1.90

1.89

1.88

Output Voltage (V)

1.87

1.86

1.85

1.81.9 2 2.12.22.32.42.5

Io=0uA
Io=1 00uA
Io=50mA
Io=200mA

Input Voltage (V)

1.6

1.4

1.2

1.0

0.8

0.6

0.4

STBY Pin Curr ent ( uA)

0.2

0.0

00.511.522.5 33.544.555.5

Temp=25°C

Temp=85°C

Temp= -40°C

Input Voltage (V)

100

VIN= 3.9V

STBY=1.5V

80

60

40

Gnd Current (uA)

20

0

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=-40°C

Temp=25°C

Output Current (A)

Fig.83. VSTBY - ISTBY

Fig.84. IOUT - IGND

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

Output Voltage (V

0.4

0.2

0.0

VIN=5.5V

0 0.1 0.2 0.3 0.4 0.5 0.6

VIN=2.9V

VIN=2 .4V

Tem p=2 5°C

STBY=1.5V

Output Current (A)

Fig.86. OCP Threshold

2.0

VIN= 3.9V

Io=0mA

1.5

1.0

0.5

Output Voltage (V)

0.0

Temp=25°C

Temp=85°C

0 0.5 1 1.5

STBY Voltage (V )

Fig.87. STBY Threshold Fig.88. VOUT - Temp

60

VIN= 2.9V

STBY=1.5V

50

Io=0µA

40

30

20

Gnd Current (uA)

10

0

-40 -15 10 35 60 85

Temp ( °C)

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Gnd Current (uA)

0.2

0.1

0.0

-40 -15 10 35 60 85

Temp ( °C)

Fig.89. IGND - Temp

Fig.90. IGND - Temp (STBY)

VIN= STBY

Temp=-40°C

VIN= 2.9V
STBY=0V

Technical Note

100

IO=0uA

80

60

40

Gnd Current (uA)

20

0

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5

Input Voltage (V)

Fig.82. Circuit Current IGND

1.95

1.94

1.93

1.92

1.91

1.90

1.89

1.88

Output Voltage (V)

1.87

1.86

1.85

0 0.05 0.1 0.15 0.2

Temp=25°C

Temp=-40°C

Output Current (A)

Fig.85. Load Regulation

1.95

1.94

1.93

1.92

1.91

1.90

1.89

1.88

Output Voltage (V)

1.87

1.86

1.85

-40 - 15 10 35 60 85

Temp ( °C)

VIN= STBY

Temp=85°C

Temp=25°C

Temp= -40°C

VIN= 2.9V

STBY=1.5V

Temp=85°C

VIN= 2.9V

STBY=1.5V

Io=100µA

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© 2011 ROHM Co., Ltd. All rights reserved.

14/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU19TD2WNVX (Ta=25℃ unless otherwise specified.)

IOUT=0mA→50mA

V
e

ut Volta

Out

1.95

1.90

1.85

1.80

Output Current (mA)

100

50

0

Fig.91. Load Response

IOUT=0mA→100mA

V
e

ut Volta

Out

1.95

1.90

1.85

1.80

Output Current (mA)

100

50

0

Fig.93. Load Response

IOUT=0mA→200mA

V
e

ut Volta

Out

2.00

1.90

1.80

1.70

Output Current (mA)

200

100

0

Fig.95. Load Response

IOUT=50mA→100mA

V
e

ut Volta

Out

1.95

1.90

1.85

1.80

Output Current (mA)

100

50

0

Fig.97. Load Response

V
e

ut Volta

Out

V
e

ut Volta

Out

V
e

ut Volta

Out

V
e

ut Volta

Out

2.00

1.95

1.90

1.85

2.00

1.95

1.90

1.85

2.10

2.00

1.90

1.80

2.00

1.95

1.90

1.85

Technical Note

IOUT=50mA→0mA

Fig.92. Load Response

IOUT=100mA→0mA

Fig.94. Load Response

IOUT=200mA→0mA

Fig.96. Load Response

IOUT=100mA→50mA

Fig.98. Load Response

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Output Current (mA)

100

50

0

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© 2011 ROHM Co., Ltd. All rights reserved.

15/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

●Reference data BU19TD2WNVX (Ta=25℃ unless otherwise specified.)

STBY=0→1.5V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.99. Start Up Time

Iout=0mA

VIN=STBY=0→2.9V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

4.0

2.0

0.0

Fig.101. Start Up Time
(VIN=STBY) Iout=0mA

STBY=1.5→0V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.103. Discharge Time

Technical Note

STBY=0→1.5V

2.0

1.0

0.0

Output Voltage (V)

Fig.100. Start Up Time

Iout=200mA

VIN=STBY=0→2.9V

2.0

1.0

0.0

Output Voltage (V)

Fig.102. Start Up Time

(VIN=STBY) Iout=200mA

VIN=2.9V→3.9V→2.9V

1.91

V
e

1.90

1.89

ut Volta

Out

1.88

Fig.104. VIN Response

STBY Voltage (V)

2.0

1.0

0.0

STBY Voltage (V)

4.0

2.0

0.0

Input Voltage (V)

4.9

3.9

2.9

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16/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Reference data BU25TD2WNVX (Ta=25℃ unless otherwise specified.)

3.5

Temp=25°C

3.0

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

00.511.522.533.544.555.5

Io=0uA
Io=100uA
Io=50mA
Io=200mA

Input Voltage (V)

VIN= STBY

2.55

Temp=25°C

2.54

2.53

2.52

2.51

2.50

2.49

2.48

Output Voltage (V)

2.47

2.46

2.45

2.4 2.5 2.6 2.7 2.8 2.9 3 3.1

Io=0uA
Io=100uA
Io=50mA
Io=200mA

Input Voltage (V)

Fig.105. Output Voltage Fig.106. Line Regulation

1.6

1.4

1.2

1.0

0.8

0.6

0.4

STBY Pin Curr ent ( uA)

0.2

0.0

00.511.522.5 33.544.555.5

Temp=85°C

Temp=25°C

Input Voltage (V)

Temp=- 40°C

100

VIN= 3.5V

STBY=1.5V

80

60

40

Gnd Current (uA)

20

0

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=-40°C

Temp=25°C

Output Current (A)

Fig.108. VSTBY - ISTBY

Fig.109. IOUT - IGND

0.35

0.30

0.25

0.20

0.15

Dropout Voltage ( V)

Temp= -40°C

0.10

0.05

0.00

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=25°C

VIN = 0.98 x VOUT

STBY=1.5V

Output Current (A)

3.0

Temp =25° C

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

VIN=5.5V

0 0.1 0.2 0.3 0.4 0.5 0.6

VIN=3 .5V

Output Current (A)

VIN=3.0V

Fig.111. Dropout Voltage

Fig.112. OCP Threshold

2.55

2.54

2.53

2.52

2.51

2.50

2.49

2.48

Output Voltage ( V)

2.47

2.46

2.45

-40 -15 10 35 60 85

Temp ( °C)

VIN= 3.5V

STBY=1.5V

Io=0.1mA

60

VIN= 3.5V

STBY=1.5V

50

Io=0mA

40

30

20

Gnd Current (uA)

10

0

-40 -15 10 35 60 85

Temp ( °C)

Fig.114. VOUT - Temp

Fig.115. IGND - Temp

VIN= STBY

STBY=1.5V

Technical Note

100

IO=0uA

80

60

40

Gnd Current (uA)

20

0

00.511.522.533.544.555.5

Input Voltage (V)

Fig.107. Circuit Current IGND

2.55

2.54

2.53

2.52

2.51

2.50

2.49

2.48

Output Voltage (V)

2.47

2.46

2.45

0 0.05 0.1 0.15 0.2

Temp=25°C

Temp=-40°C

Output Current (A)

Fig.110. Load Regulation

3.0

VIN= 3.5V

2.5

Io=0mA

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

Temp=25°C

Temp=85°C

0 0.5 1 1.5

STBY Voltage (V )

Fig.113. STBY Threshold

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Gnd Current (uA)

0.2

0.1

0.0

-40 -15 10 35 60 85

Temp ( °C)

Fig.116. IGND - Temp (STBY)

Temp=85°C

Temp=25°C

Temp=85°C

Temp=-40°C

VIN= STBY

Temp= -40°C

VIN= 3.5V

STBY=1.5V

VIN= 3.5V

STBY=0V

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17/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU25TD2WNVX (Ta=25℃ unless otherwise specified.)

IOUT=0mA→50mA

V
e

ut Volta

Out

2.55

2.50

2.45

2.40

Output Current (mA)

100

50

0

Fig.117. Load Response

IOUT=0mA→100mA

V
e

ut Volta

Out

2.55

2.50

2.45

2.40

Output Current (mA)

100

50

0

Fig.119. Load Response

IOUT=0mA→200mA

V
e

ut Volta

Out

2.60

2.50

2.40

2.30

Output Current (mA)

200

100

0

Fig.121. Load Response

IOUT=50mA→100mA

V
e

ut Volta

Out

2.55

2.50

2.45

2.40

Output Current (mA)

100

50

0

Fig.123. Load Response

V
e

ut Volta

Out

V
e

ut Volta

Out

V
e

ut Volta

Out

V
e

ut Volta

Out

2.70

2.65

2.50

2.45

2.60

2.55

2.50

2.45

2.70

2.60

2.50

2.40

2.0

2.55

2.50

2.45

Technical Note

IOUT=50mA→0mA

Fig.118. Load Response

IOUT=100mA→0mA

Fig.120. Load Response

IOUT=200mA→0mA

Fig.122. Load Response

IOUT=100mA→50mA

Fig.124. Load Response

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Output Current (mA)

200

100

0

Output Current (mA)

100

50

0

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© 2011 ROHM Co., Ltd. All rights reserved.

18/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

●Reference data BU25TD2WNVX (Ta=25℃ unless otherwise specified.)

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.125. Start Up Time

Iout=0mA

VIN=STBY=0→3.5V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

4.0

2.0

0.0

Fig.127. Start Up Time
(VIN=STBY) Iout=0mA

STBY=1.5→0V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0

Fig.129. Discharge Time

Technical Note

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

Fig.126. Start Up Time

Iout=200mA

VIN=STBY=0→3.5V

4.0

2.0

0.0

Output Voltage (V)

Fig.128. Start Up Time

(VIN=STBY) Iout=200mA

VIN=3.5V→4.5V→3.5V

2.51

V
e

2.50

2.49

ut Volta

Out

2.48

Fig.130. VIN Response

STBY Voltage (V)

2.0

1.0

0.0

STBY Voltage (V)

4.0

2.0

0.0

Input Voltage (V)

5.5

4.5

3.5

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© 2011 ROHM Co., Ltd. All rights reserved.

19/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Reference data BU26TD2WNVX (Ta=25℃ unless otherwise specified.)

3.0

Temp=25°C

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

00.511.522.533.544.555.5

Io=0uA
Io=1 00uA
Io=50mA
Io=200mA

Input Voltage (V)

VIN= STBY

2.65

Temp=25°C

2.64

2.63

2.62

2.61

2.60

2.59

2.58

Output Voltage (V)

2.57

2.56

2.55

2.5 2.6 2.7 2.8 2.9 3 3.1 3.2

Io=0uA
Io=100uA
Io=50mA
Io=200mA

Input Voltage (V)

Fig.131. Output Voltage

Fig.132. Line Regulation

1.6

1.4

1.2

1.0

0.8

0.6

0.4

STBY Pin Curr ent ( uA)

0.2

0.0

00.511.522.5 33.544.555.5

Temp=85°C

Temp=25°C

Input Voltage (V)

Temp=- 40°C

100

VIN= 3.6V

STBY=1.5V

80

60

40

Gnd Current (uA)

20

0

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=-40°C

Temp=25°C

Output Current (A)

Fig.134. VSTBY - ISTBY

Fig.135. IOUT - IGND Fig.136. Load Regulation

0.35

0.30

0.25

0.20

0.15

Dropout Voltage ( V)

Temp=-40°C

0.10

0.05

0.00

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=25°C

VIN = 0.98 x VOUT

STBY=1.5V

Output Current (A)

3.0

Temp=25°C

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

VIN=5.5V

0 0.1 0.2 0.3 0.4 0.5 0.6

Output Current (A)

VIN=3.6V

Fig.137. Dropout Voltage

Fig.138. OCP Threshold

2.65

2.64

2.63

2.62

2.61

2.60

2.59

2.58

Output Voltage (V)

2.57

2.56

2.55

-40 -15 10 35 60 85

Temp ( °C)

VIN= 3.6V

STBY=1.5V

Io=0.1mA

60

VIN= 3.6V

STBY=1.5V

50

Io=0mA

40

30

20

Gnd Current (uA)

10

0

-40 -15 10 35 60 85

Temp ( °C)

Fig.140. VOUT - Temp

Fig.141. IGND - Temp Fig.142. IGND - Temp (STBY)

VIN= STBY

VIN=3.1V

STBY=1.5V

Technical Note

100

IO=0uA

80

60

40

Gn d Cu rren t (u A)

20

0

00.511.522.533.544.555.5

Fig.133. Circuit Current IGND

2.65

2.64

2.63

2.62

2.61

2.60

2.59

2.58

Output Voltage (V)

2.57

2.56

2.55

0 0.05 0.1 0.15 0.2

3.0

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

0 0.5 1 1.5

Fig.139. STBY Threshold

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Gnd Current (uA)

0.2

0.1

0.0

-40 -15 10 35 60 85

VIN= 3.6V

STBY=1.5V

Temp=-40°C

VIN= 3.6V

Io=0mA

Temp=25°C

Temp=85°C

Input Voltage (V)

Temp=25°C

Temp=85°C

Output Current (A)

STBY Voltage (V )

Temp ( °C)

VIN=ST BY

Temp=85°C

Temp= 25°C

Temp=-40°C

Temp=-40°C

VIN= 3.6V

STBY=0V

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© 2011 ROHM Co., Ltd. All rights reserved.

20/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU26TD2WNVX (Ta=25℃ unless otherwise specified.)

V
e

ut Volta

Out

2.65

2.60

2.55

2.50

IOUT=0mA→50mA

Fig.143. Load Response

Output Current (mA)

100

50

0

V
e

ut Volta

Out

IOUT=0mA→100mA

2.65

2.60

2.55

2.50

Output Current (mA)

100

50

0

Fig.145. Load Response

V
e

ut Volta

Out

2.70

2.60

2.50

2.40

IOUT=0mA→200mA

Output Current (mA)

200

100

0

Fig.147. Load Response

V
e

ut Volta

Out

2.65

2.60

2.55

2.50

IOUT=50mA→100mA

Output Current (mA)

100

50

0

Fig.149. Load Response

V
e

ut Volta

Out

V
e

ut Volta

Out

V
e

ut Volta

Out

V
e

ut Volta

Out

2.60

2.59

2.60

2.55

2.62

2.61

2.70

2.65

2.60

2.55

2.80

2.70

2.60

2.50

2.70

2.65

Technical Note

IOUT=50mA→0mA

Fig.144. Load Response

IOUT=100mA→0mA

Fig.146. Load Response

IOUT=200mA→0mA

Fig.148. Load Response

IOUT=100mA→50mA

Fig.150. Load Response

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Output Current (mA)

100

50

0

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© 2011 ROHM Co., Ltd. All rights reserved.

21/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

●Reference data BU26TD2WNVX (Ta=25℃ unless otherwise specified.)

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.151. Start Up Time

Iout=0mA

VIN=STBY=0→3.6V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

4.0

2.0

0.0

Fig.153. Start Up Time
(VIN=STBY) Iout=0mA

STBY=1.5→0V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.155. Discharge Time

V
e

ut Volta

Out

Technical Note

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

Fig.152. Start Up Time

Iout=200mA

VIN=STBY=0→3.6V

4.0

2.0

0.0

Output Voltage (V)

Fig.154. Start Up Time

(VIN=STBY) Iout=200mA

VIN=3.6V→4.6V→3.6V

2.65

2.60

2.55

Fig.156. VIN Response

STBY Voltage (V)

2.0

1.0

0.0

STBY Voltage (V)

4.0

2.0

0.0

Input Voltage (V)

5.6

4.6

3.6

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© 2011 ROHM Co., Ltd. All rights reserved.

22/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Reference data BU27TD2WNVX (Ta=25℃ unless otherwise specified.)

3.0

Temp=25°C

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

00.511.522.533.544.555.5

Io=0uA
Io=1 00uA
Io=50mA
Io=200mA

Input Voltage (V)

VIN= STBY

2.75

Temp=25°C

2.74

2.73

2.72

2.71

2.70

2.69

2.68

Output Voltage (V)

2.67

2.66

2.65

2.62.72.82.9 3 3.13.23.3

Io=0uA
Io=100uA
Io=50mA
Io=200mA

Input Voltage (V)

Fig.157. Output Voltage Fig.158. Line Regulation

1.6

1.4

1.2

1.0

0.8

0.6

0.4

STBY Pin Curr ent ( uA)

0.2

0.0

00.511.522.5 33.544.555.5

Temp=85°C

Temp=25°C

Input Voltage (V)

Temp=- 40°C

100

VIN= 3.7V

STBY=1.5V

80

60

40

Gnd Current (uA)

20

0

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=-40°C

Temp=25°C

Output Current (A)

Fig.160. VSTBY - ISTBY

Fig.161. IOUT - IGND

0.35

0.30

0.25

0.20

Temp=-40°C

0.15

0.10

Dropout Voltage (V)

0.05

0.00

0 0.05 0 .1 0.15 0.2

Fig.163. Dropout Voltage

Temp=85°C

Temp=25°C

VIN = 0.98 x VOUT

Output Current (A)

STBY=1.5V

3.0

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

0 0.1 0.2 0.3 0.4 0.5 0.6

VIN=5.5V

VIN=3 .6V

Output Current (A)

Fig.164. OCP Threshold

2.75

2.74

2.73

2.72

2.71

2.70

2.69

2.68

Output Voltage (V)

2.67

2.66

2.65

-40 -15 10 35 60 85

Temp ( °C)

VIN= 3.7V

STBY=1.5V

Io=0.1mA

60

VIN= 3.7V

STBY=1.5V

50

Io=0.1mA

40

30

20

Gnd Current (uA)

10

0

-40 -15 10 35 60 85

Temp ( °C)

Fig.166. VOUT - Temp Fig.167. IGND - Temp

VIN= STBY

VIN=3. 1V

Temp =25° C

STBY=1.5V

Technical Note

100

IO=0uA

80

60

40

Gn d Cu rren t (u A)

20

0

00.511.522.533.544.555.5

Fig.159. Circuit Current IGND

2.75

2.74

2.73

2.72

2.71

2.70

2.69

2.68

Output Voltage (V)

2.67

2.66

2.65

0 0.05 0 .1 0.15 0.2

Fig.162. Load Regulation

3.0

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

0 0.5 1 1.5

Fig.165. STBY Threshold

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Gnd Current (uA)

0.2

0.1

0.0

-40 -15 10 35 60 85

Fig.168. IGND - Temp (STBY)

VIN= 3.7V

STBY=1.5V

Temp=-40°C

VIN= 3.7V

Io=0mA

Input Voltage (V)

Temp=25°C

Output Current (A)

Temp=25°C

Temp=85°C

STBY Voltage (V )

Temp ( °C)

VIN=ST BY

Temp= 85°C

Temp= 25°C

Temp= -40°C

Temp=85°C

Temp=-40°C

VIN= 3.7V

STBY=0V

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© 2011 ROHM Co., Ltd. All rights reserved.

23/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU27TD2WNVX (Ta=25℃ unless otherwise specified.)

IOUT=0mA→50mA

V
e

ut Volta

Out

2.75

2.70

2.65

2.60

Output Current (mA)

100

50

0

Fig.169. Load Response

IOUT=0mA→100mA

V
e

ut Volta

Out

2.75

2.70

2.65

2.60

Output Current (mA)

100

50

0

Fig.171. Load Response

IOUT=0mA→200mA

V
e

ut Volta

Out

2.80

2.70

2.60

2.50

Output Current (mA)

200

100

0

Fig.173. Load Response

IOUT=50mA→100mA

V
e

ut Volta

Out

2.75

2.70

2.65

2.60

Output Current (mA)

100

50

0

Fig.175. Load Response

Technical Note

IOUT=50mA→0mA

2.80

V
e

2.75

2.70

ut Volta

Out

2.65

Fig.170. Load Response

IOUT=100mA→0mA

2.80

V
e

2.75

2.70

ut Volta

Out

2.65

Fig.172. Load Response

IOUT=200mA→0mA

2.90

V
e

2.80

2.70

ut Volta

Out

2.60

Fig.174. Load Response

IOUT=100mA→50mA

2.80

V
e

2.75

2.70

ut Volta

Out

2.65

Fig.176. Load Response

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Output Current (mA)

100

50

0

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© 2011 ROHM Co., Ltd. All rights reserved.

24/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

●Reference data BU27TD2WNVX (Ta=25℃ unless otherwise specified.)

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.177. Start Up Time

Iout=0mA

VIN=STBY=0→3.7V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

4.0

2.0

0.0

Fig.179. Start Up Time

(VIN=STBY) Iout=0mA

STBY=1.5→0V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.181. Discharge Time

Technical Note

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

Fig.178. Start Up Time

Iout=200mA

VIN=STBY=0→3.7V

4.0

2.0

0.0

Output Voltage (V)

Fig.180. Start Up Time

(VIN=STBY) Iout=200mA

2.71

V
e

2.70

2.69

ut Volta

Out

2.68

Fig.182. VIN Response

STBY Voltage (V)

2.0

1.0

0.0

STBY Voltage (V)

4.0

2.0

0.0

Input Voltage (V)

5.7

4.7

3.7

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© 2011 ROHM Co., Ltd. All rights reserved.

25/41

2011.07 - Rev.C

BU□□TD2WNVX series

)

●Reference data BU28TD2WNVX (Ta=25℃ unless otherwise specified.)

3.0

Temp=25°C

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

00.511.522.533.544.555.5

Io=0uA
Io=1 00uA
Io=50mA
Io=200mA

Input Voltage (V)

VIN= STBY

2.85

Temp=25°C VIN=ST BY

2.84

2.83

2.82

2.81

2.80

2.79

2.78

Output Voltage (V)

2.77

2.76

2.75

2.7 2.8 2.9 3 3.1 3.2 3.3 3.4

Io=0uA
Io=1 00uA
Io=50mA
Io=200mA

Input Voltage (V)

Fig.183. Output Voltage Fig.184. Line Regulation Fig.185. Circuit Current IGND

1.6

1.4

1.2

1.0

0.8

0.6

0.4

STBY Pin Curr ent ( uA)

0.2

0.0

00.511.522.5 33.544.555.5

Temp=85°C

Temp=25°C

Input Voltage (V)

Temp=- 40°C

100

VIN= 3.8V

STBY= 1.5V

80

60

40

Gnd Curr ent (uA)

20

0

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=-40°C

Temp=25°C

Output Current (A )

Fig.186. VSTBY - ISTBY

Fig.187. IOUT - IGND

0.35

0.30

0.25

0.20

0.15

Temp=-40°C

0.10

Dropout Voltage (V)

0.05

0.00

0 0.05 0 .1 0.15 0.2

Temp=85°C

Temp=25°C

VIN = 0.98 x VOUT

Output Current (A)

STBY=1.5V

3.0

2.5

2.0

1.5

1.0

Output Voltage (V

0.5

0.0

VIN=5.5V

0 0.1 0.2 0.3 0.4 0.5 0.6

Output Current (A)

VIN=3.8V

Fig.189. Dropout Voltage

Fig.190. OCP Threshold

2.85

2.84

2.83

2.82

2.81

2.80

2.79

2.78

Output Voltage (V)

2.77

2.76

2.75

-40 -15 10 35 60 85

Temp ( °C)

VIN= 3.8V

STBY= 1.5V

Io=0.1mA

60

VIN= 3.8V

STBY= 1.5V

50

Io=0mA

40

30

20

Gnd Current (uA)

10

0

-40 -15 10 35 60 85

Temp ( °C)

Fig.192. VOUT - Temp

Fig.193. IGND - Temp Fig.194. IGND - Temp (STBY)

VIN=3 .3V

Tem p=2 5°C

STBY=1.5V

Technical Note

100

Io=0uA

80

60

40

Gnd Cur rent (uA)

20

0

00.511.522.533.544.555.5

Input Voltage (V )

2.85

VIN= 3.8V

2.84

STBY=1.5V

2.83

2.82

2.81

2.80

2.79

2.78

Output Voltage (V)

2.77

2.76

Temp=-40°C

2.75

0 0.05 0 .1 0.15 0.2

Temp=25°C

Temp=85°C

Output Current (A)

Fig.188. Load Regulation

3.0

VIN= 3.8V

2.5

Io=0mA

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

Temp=25°C

Temp=85°C

00.511.5

STBY V oltage (V)

Fig.191. STBY Threshold

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Gnd Current (uA)

0.2

0.1

0.0

-40 -15 10 35 60 85

Temp ( °C)

VIN=ST BY

Temp=85°C

Temp=25°C

Temp=-40°C

Temp=-40°C

VIN= 3.8V

STBY= 0V

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© 2011 ROHM Co., Ltd. All rights reserved.

26/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU28TD2WNVX (Ta=25℃ unless otherwise specified.)

IOUT=0mA→50mA

V
e

ut Volta

Out

2.85

2.80

2.75

2.70

Output Current (mA)

100

50

0

Fig.195. Load Response

IOUT=0mA→100mA

V
e

ut Volta

Out

2.85

2.80

2.75

2.70

Output Current (mA)

100

50

0

Fig.197. Load Response

IOUT=0mA→200mA

V
e

ut Volta

Out

2.90

2.80

2.70

2.60

Output Current (mA)

200

100

0

Fig.199. Load Response

IOUT=50mA→100mA

V
e

ut Volta

Out

2.85

2.80

2.75

2.70

Output Current (mA)

100

50

0

Fig.201. Load Response

V
e

ut Volta

Out

2.80

2.75

2.90

2.85

V
e

ut Volta

Out

V
e

ut Volta

Out

V
e

ut Volta

Out

2.80

2.75

2.80

2.75

2.80

2.70

2.90

2.85

2.90

2.85

3.00

2.90

Technical Note

Fig.196. Load Response

IOUT=100mA→0mA

Fig.198. Load Response

IOUT=200mA→0mA

Fig.200. Load Response

IOUT=100mA→50mA

Fig.202. Load Response

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Output Current (mA)

100

50

0

www.rohm.com

© 2011 ROHM Co., Ltd. All rights reserved.

27/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

●Reference data BU28TD2WNVX (Ta=25℃ unless otherwise specified.)

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.203. Start Up Time

Iout=0mA

VIN=STBY=0→3.8V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

4.0

2.0

0.0

Fig.205. Start Up Time

(VIN=STBY) Iout=0mA

4.0

2.0

0.0

Output Voltage (V)

STBY=1.5→0V

STBY Voltage (V)

2.0

1.0

0.0

Fig.207. Discharge Time

V
e

ut Volta

Out

Technical Note

STBY Voltage (V)

2.0

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

Fig.204. Start Up Time

Iout=200mA

VIN=STBY=0→3.8V

4.0

2.0

0.0

Output Voltage (V)

Fig.206. Start Up Time

(VIN=STBY) Iout=200mA

VIN=3.8→4.8V→3.8V

2.81

2.80

2.79

2.78

Fig.208. VIN Response

1.0

0.0

STBY Voltage (V)

4.0

2.0

0.0

Input Voltage (V)

5.8

4.8

3.8

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© 2011 ROHM Co., Ltd. All rights reserved.

28/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Reference data BU30TD2WNVX (Ta=25℃ unless otherwise specified.)

3.5

Temp=25°C

3.0

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

00.511.522.533.544.555.5

Io=0uA
Io=1 00uA
Io=50mA
Io=200mA

Input Voltage (V)

VIN= STBY

3.05

Temp=25°C

3.04

3.03

3.02

3.01

3.00

2.99

2.98

Output Voltage (V)

2.97

2.96

2.95

2.9 3 3.13.2 3.33.4 3.53.6

Io=0uA
Io=1 00uA
Io=50mA
Io=2 00mA

Input Voltage (V)

Fig.209. Output Voltage Fig.210. Line Regulation

1.6

1.4

1.2

1.0

0.8

0.6

0.4

STBY Pin Curr ent ( uA)

0.2

0.0

00.511.522.5 33.544.555.5

Temp=85°C

Temp=25°C

Input Voltage (V)

Temp=-40°C

100

VIN= 4.0V

STBY= 1.5V

80

60

40

Gnd Current (uA)

20

0

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=-40°C

Temp=25°C

Output Cur rent (A )

Fig.212. VSTBY - ISTBY

Fig.213. IOUT - IGND

0.30

0.25

0.20

0.15

0.10

Dropout Voltage ( V)

0.05

0.00

Temp= -40°C

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=25°C

VIN = 0.98 x VOUT

STBY=1.5V

Output Current (A)

3.5

3.0

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

0 0.10.20.30.40.50.6

VIN=5.5V

VIN=3.5V

Output Current (A )

Fig.215. Dropout Voltage

Fig.216. OCP Threshold

3.05

3.04

3.03

3.02

3.01

3.00

2.99

2.98

Output Voltage (V)

2.97

2.96

2.95

-40 -15 10 35 60 85

Temp ( °C)

VIN= 4.0V

STBY=1.5V

Io=0.1mA

60

VIN= 4.0V

STBY=1.5V

50

Io=0mA

40

30

20

Gnd Curr ent (uA)

10

0

-40 -15 10 35 60 85

Temp ( °C)

Fig.218. VOUT - Temp

Fig.219. IGND - Temp Fig.220. IGND - Temp (STBY)

VIN=ST BY

VIN=4.0V

Temp=25°C

STBY= 1.5V

Technical Note

100

Io=0uA VIN= STBY

80

60

40

Gnd Curr ent (uA)

20

0

00.511.522.533.544.555.5

Input Voltage (V)

Fig.211. Circuit Current IGND

3.05

VIN= 4.0V

3.04

STBY=1.5V

3.03

3.02

3.01

3.00

2.99

2.98

Output Voltage (V)

2.97

Temp=-40°C

2.96

2.95

0 0.05 0.1 0.15 0.2

Temp=25°C

Output Current (A)

Fig.214. Load Regulation

3.5

VIN= 4.0V

3.0

Io=0mA

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

Temp=25°C

Temp=85°C

00.511.5

STBY V oltage (V)

Fig.217. STBY Threshold

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Gnd Current (uA)

0.2

0.1

0.0

-40 -15 10 35 60 85

Temp ( °C)

Temp=85°C

Temp=85°C

Temp=25°C

Temp=-40°C

Temp=-40°C

VIN= 4.0V
STBY=0V

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© 2011 ROHM Co., Ltd. All rights reserved.

29/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU30TD2WNVX (Ta=25℃ unless otherwise specified.)

IOUT=0mA→50mA

V
e

ut Volta

Out

3.05

3.00

2.95

2.90

Output Current (mA)

100

50

0

Fig.221. Load Response

IOUT=0mA→100mA

V
e

ut Volta

Out

3.05

3.00

2.95

2.90

Output Current (mA)

100

50

0

Fig.223. Load Response

IOUT=0mA→200mA

V
e

ut Volta

Out

3.10

3.00

2.90

2.80

Output Current (mA)

200

100

0

Fig.225. Load Response

IOUT=50mA→100mA

V
e

ut Volta

Out

3.05

3.00

2.95

2.90

Output Current (mA)

100

50

0

Fig.227. Load Response

Technical Note

IOUT=50mA→0mA

3.10

V
e

3.05

3.00

ut Volta

Out

2.95

Fig.222. Load Response

IOUT=100mA→0mA

3.10

V
e

3.05

3.00

ut Volta

Out

2.95

Fig.224. Load Response

IOUT=200mA→0mA

3.20

V
e

3.10

3.00

ut Volta

Out

2.90

Fig.226. Load Response

IOUT=100mA→50mA

3.10

V
e

3.05

3.00

ut Volta

Out

2.95

Fig.228. Load Response

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Output Current (mA)

100

50

0

www.rohm.com

© 2011 ROHM Co., Ltd. All rights reserved.

30/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

●Reference data BU30TD2WNVX (Ta=25℃ unless otherwise specified.)

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.229. Start Up Time

Iout=0mA

VIN=STBY=0→4.0V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

4.0

2.0

0.0

Fig.231. Start Up Time

(VIN=STBY) Iout=0mA

4.0

2.0

0.0

Output Voltage (V)

STBY=1.5→0V

STBY Voltage (V)

4.0

2.0

0.0

Fig.233. Discharge Time

Technical Note

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

Fig.230. Start Up Time

Iout=200mA

VIN=STBY=0→4.0V

4.0

2.0

0.0

Output Voltage (V)

Fig.232. Start Up Time

(VIN=STBY) Iout=200mA

VIN=4.0→5.0V→4.0V

3.01

V
e

3.00

2.99

ut Volta

Out

2.98

Fig.234. VIN Response

STBY Voltage (V)

2.0

1.0

0.0

STBY Voltage (V)

4.0

2.0

0.0

Input Voltage (V)

6.0

5.0

4.0

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© 2011 ROHM Co., Ltd. All rights reserved.

31/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Reference data BU31TD2WNVX (Ta=25℃ unless otherwise specified.)

3.5

Temp=25°C

3.0

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

00.511.522.533.544.555.5

Io=0uA
Io=1 00uA
Io=50mA
Io=200mA

Input Voltage (V)

VIN= STBY

3.15

3.14

Temp=25°C

3.13

3.12

3.11

3.10

3.09

3.08

3.07

Output Voltage (V)

3.06

3.05

3 3.1 3.2 3.3 3.4 3.5 3.6 3.7

Io=0uA
Io=100uA
Io=50mA
Io=200mA

Input Voltage (V)

Fig.235. Output Voltage

Fig.236. Line Regulation

1.6

1.4

1.2

1.0

0.8

0.6

0.4

STBY Pin Curr ent ( uA)

0.2

0.0

00.511.522.5 33.544.555.5

Temp=85°C

Temp=25°C

Input Voltage (V)

Temp=-40°C

100

VIN= 4.1V

STBY= 1.5V

80

60

40

Gnd Curr ent (uA)

20

0

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=-40°C

Temp=25°C

Output Current (A )

Fig.238. VSTBY - ISTBY

Fig.239. IOUT - IGND Fig.240. Load Regulation

0.30

0.25

0.20

0.15

Temp=-40°C

0.10

Dropout Voltage ( V)

0.05

0.00

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=25°C

VIN = 0.98 x VOUT

Output Current (A)

STBY=1.5V

3.5

3.0

2.5

VIN=5.5V

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

0 0.1 0.2 0.3 0.4 0.5 0.6

VIN=4.1V

Output Current (A)

VIN=3.6V

Fig.241. Dropout Voltage

Fig.242. OCP Threshold

3.15

VIN=4.1V

3.14

STBY=1.5V

3.13

Io=0.1mA

3.12

3.11

3.10

3.09

3.08

3.07

Output Voltage (V)

3.06

3.05

-40 -15 10 35 60 85

Temp (°C)

60

VIN=4.1V

50

STBY=1.5V

Io=0mA

40

30

20

Gnd Current (uA)

10

0

-40 -15 10 35 60 85

Temp (°C)

Fig.244. VOUT - Temp

Fig.245. IGND - Temp Fig.246. IGND - Temp (STBY)

VIN=STBY

Temp=25°C

STBY=1.5V

Technical Note

100

IO=0uA

80

60

40

Gnd Current (uA)

20

0

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5

Input Voltage (V)

Fig.237. Circuit Current IGND

3.15

VIN= 4.1V

STBY=1.5V

3.13

3.11

3.09

Output Voltage (V)

3.07

3.05

3.5

3.0

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

0 0.5 1 1.5

Fig.243. STBY Threshold

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Gnd Current (uA)

0.2

0.1

0.0

-40 -15 10 35 60 85

Temp=25°C

Temp= -40°C

0 0.05 0.1 0.15 0.2

Output Current (A)

VIN=4.1V

Io=0mA

Temp=25°C

Temp=85°C

STBY Voltage (V)

Temp ( °C)

VIN=STBY

Temp=85°

Temp=25°

Temp=-40°C

Temp=85°C

Temp=-40°C

VIN= 4.1V

STBY=0V

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© 2011 ROHM Co., Ltd. All rights reserved.

32/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU31TD2WNVX (Ta=25℃ unless otherwise specified.)

IOUT=0mA→50mA

V
e

ut Volta

Out

3.15

3.10

3.05

3.00

Output Current (mA)

100

50

0

Fig.247. Load Response

IOUT=0mA→100mA

V
e

ut Volta

Out

3.15

3.10

3.05

3.00

Output Current (mA)

100

50

0

Fig.249. Load Response

IOUT=0mA→200mA

V
e

ut Volta

Out

3.20

3.10

3.00

2.90

Output Current (mA)

200

100

0

Fig.251. Load Response

IOUT=50mA→100mA

V
e

ut Volta

Out

3.15

3.10

3.05

3.00

Output Current (mA)

100

50

0

Fig.253. Load Response

Technical Note

IOUT=50mA→0mA

3.20

V
e

3.15

3.10

ut Volta

Out

3.05

Fig.248. Load Response

IOUT=100mA→0mA

3.20

V
e

3.15

3.10

ut Volta

Out

3.05

Fig.250. Load Response

IOUT=200mA→0mA

3.30

V
e

3.20

3.10

ut Volta

Out

3.00

Fig.252. Load Response

IOUT=100mA→50mA

3.20

V
e

3.15

3.10

ut Volta

Out

3.05

Fig.254. Load Response

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Output Current (mA)

100

50

0

www.rohm.com

© 2011 ROHM Co., Ltd. All rights reserved.

33/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

●Reference data BU31TD2WNVX (Ta=25℃ unless otherwise specified.)

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.255. Start Up Time

Iout=0mA

VIN=STBY=0→4.1V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

4.0

2.0

0.0

Fig.257. Start Up Time

(VIN=STBY) Iout=0mA

STBY=1.5→0V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.259. Discharge Time

Technical Note

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

Fig.256. Start Up Time

Iout=200mA

VIN=STBY=0→4.1V

4.0

2.0

0.0

Output Voltage (V)

Fig.258. Start Up Time

(VIN=STBY) Iout=200mA

VIN=4.1V→5.1V→4.1V

3.11

V
e

3.10

3.09

ut Volta

Out

3.08

Fig.260. VIN Response

STBY Voltage (V)

2.0

1.0

0.0

STBY Voltage (V)

4.0

2.0

0.0

Input Voltage (V)

6.1

5.1

4.1

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© 2011 ROHM Co., Ltd. All rights reserved.

34/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Reference data BU33TD2WNVX (Ta=25℃ unless otherwise specified.)

3.5

Temp=25°C

3.0

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

00.511.522.533.544.555.5

Io=0uA
Io=1 00uA
Io=50mA
Io=200mA

Input Voltage (V)

VIN= STBY

3.35

Temp=25°C

3.34

3.33

3.32

3.31

3.30

3.29

3.28

Output Voltage (V)

3.27

3.26

3.25

3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9

Io=0uA
Io=100uA
Io=50mA
Io=200mA

Input Voltage (V)

Fig.261. Output Voltage Fig.262. Line Regulation

1.6

1.4

1.2

1.0

0.8

0.6

0.4

STBY Pin Curr ent ( uA)

0.2

0.0

00.511.522.5 33.544.555.5

Temp=25°C

Temp=85°C

Temp= -40°C

Input Voltage (V)

100

VIN= 4.3V

STBY= 1.5V

80

60

40

Gnd Curr ent (uA)

20

0

0 0.05 0.1 0.15 0.2

Temp=85°C

Temp=-40°C

Temp=25°C

Output Current (A )

Fig.264. VSTBY - ISTBY

Fig.265. IOUT - IGND Fig.266. Load Regulation

0.30

0.25

0.20

0.15

Temp= -40°C

0.10

Dropout Voltage (V)

0.05

0.00

0 0.05 0 .1 0.15 0.2

Temp=85°C

Temp=25°C

VIN = 0.98 x VOUT

STBY=1.5V

Output Current (A)

3.50

3.00

2.50

2.00

1.50

1.00

Output Voltage (V)

0.50

0.00

VIN=5.5V

0 0.1 0.2 0.3 0.4 0.5 0.6

Output Current (A )

VIN=4.3V

Fig.267. Dropout Voltage Fig.268. OCP Threshold

3.35

3.34

3.33

3.32

3.31

3.30

3.29

3.28

Output Voltage (V)

3.27

3.26

3.25

-40 -15 10 35 60 85

Temp ( °C)

VIN= 4.3V

STBY=1.5V

Io=0.1mA

60

VIN= 4.3V

STBY=1.5V

50

Io=0mA

40

30

20

Gnd Curr ent (uA)

10

0

-40 -15 10 35 60 85

Temp ( °C)

Fig.270. VOUT - Temp Fig.271. IGND - Temp Fig.272. IGND - Temp (STBY)

VIN=ST BY

VIN=3.8V

Temp=25°C

STBY=1.5V

Technical Note

100

Io=0uA VIN= STBY

80

60

40

Gnd Curr ent (uA)

20

0

00.511.522.533.544.555.5

Input Voltage (V)

Fig.263. Circuit Current IGND

3.35

VIN= 4.3V

3.34

STBY=1.5V

3.33

3.32

3.31

3.30

3.29

3.28

Output Voltage (V)

3.27

3.26

Temp= -40°C

3.25

0 0.05 0 .1 0.15 0.2

Temp=25°C

Temp=85°C

Output Current (A)

3.5

VIN= 4.3V

3.0

Io=0mA

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

Temp=25°C

Temp=85°C

00.511.5

STBY V oltage (V)

Fig.269. STBY Threshold

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

Gnd Curr ent (uA)

0.2

0.1

0.0

-40 -15 10 35 60 85

Temp ( °C)

Temp=85°C

Temp=25°C

Temp=-40°C

Temp=-40°C

VIN= 4.3V

STBY=0V

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© 2011 ROHM Co., Ltd. All rights reserved.

35/41

2011.07 - Rev.C

BU□□TD2WNVX series

p
g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU33TD2WNVX (Ta=25℃ unless otherwise specified.)

IOUT=0mA→50mA

V
e

ut Volta

Out

3.35

3.30

3.25

3.20

Output Current (mA)

100

50

0

Fig.273. Load Response

IOUT=0mA→100mA

V
e

ut Volta

Out

3.35

3.30

3.25

3.20

Output Current (mA)

100

50

0

Fig.275. Load Response

V
e

ut Volta

Out

3.40

3.30

3.20

3.10

IOUT=0mA→200mA

Output Current (mA)

200

100

0

Fig.277. Load Response

IOUT=50mA→100mA

V
e

ut Volta

Out

3.35

3.30

3.25

3.20

Output Current (mA)

100

50

0

Fig.279. Load Response

V
e

ut Volta

Out

V
e

ut Volta

Out

V
e

ut Volta

Out

V
e

ut Volta

Out

IOUT=50mA→0mA

3.40

3.35

3.30

3.25

Fig.274. Load Response

IOUT=100mA→0mA

3.40

3.35

3.30

3.25

Fig.276. Load Response

IOUT=200mA→0mA

3.50

3.40

3.30

3.20

Fig.278. Load Response

IOUT=100mA→50mA

3.40

3.35

3.30

3.25

Fig.280. Load Response

Technical Note

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Output Current (mA)

100

50

0

www.rohm.com

© 2011 ROHM Co., Ltd. All rights reserved.

36/41

2011.07 - Rev.C

BU□□TD2WNVX series

p

g

(

)

●Reference data BU33TD2WNVX (Ta=25℃ unless otherwise specified.)

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Fig.281. Start Up Time

Iout=0mA

VIN=STBY=0→4.3 V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

4.0

2.0

0.0

Fig.283. Start Up Time
(VIN=STBY) Iout=0mA

4.0

2.0

0.0

Output Voltage (V)

STBY=1.5→0V

STBY Voltage (V)

2.0

1.0

0.0

Fig.285. Discharge Time

Technical Note

STBY=0→1.5V

4.0

2.0

0.0

Output Voltage (V)

Fig.282. Start Up Time

Iout=200mA

VIN=STBY=0→4.3V

4.0

2.0

0.0

Output Voltage (V)

Fig.284. Start Up Time

(VIN=STBY) Iout=200mA

VIN=4.3V→5.3V→5.3V

3.31

V
e

3.30

3.29

ut Volta

Out

3.28

Fig.286. VIN Response

STBY Voltage (V)

2.0

1.0

0.0

STBY Voltage (V)

4.0

2.0

0.0

Input Voltage (V)

6.3

5.3

4.3

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2011.07 - Rev.C

BU□□TD2WNVX series

Technical Note

 About power dissipation (Pd)

As for power dissipation, an approximate estimate of the heat reduction characteristics and internal power consumption of
IC are shown, so please use these for reference. Since power dissipation changes substantially depending on the
implementation conditions (board size, board thickness, metal wiring rate, number of layers and through holes, etc.), it is
recommended to measure Pd on a set board. Exceeding the power dissipation of IC may lead to deterioration of the original
IC performance, such as causing operation of the thermal shutdown circuit or reduction in current capability. Therefore, be
sure to prepare sufficient margin within power dissipation for usage.

Calculation of the maximum internal power consumption of IC (PMAX)

PMAX=(VIN-VOUT)×IOUT(MAX.) (VIN: Input voltage VOUT: Output voltage IOUT(MAX): Maximum output current)

○Measurement conditions

Standard ROHM Board Evaluation Board 1

Layout of Board for
Measurement

Top Layer (Top View) Top Layer (Top View)

IC Implementation
Position

Bottom Layer (Top View) Bottom Layer (Top View)

Measurement State With board implemented (Wind speed 0 m/s) With board implemented (Wind speed 0 m/s)

Board Material Glass epoxy resin (Double-side board) Glass epoxy resin (Double-side board)

Board Size 70 mm x 70 mm x 1.6 mm 40 mm x 40 mm x 1.6 mm

Wiring
Rate

Top layer Metal (GND) wiring rate: Approx. 0% Metal (GND) wiring rate: Approx. 50%

Bottom layer Metal (GND) wiring rate: Approx. 50% Metal (GND) wiring rate: Approx. 50%

Through Hole Diameter 0.5mm x 6 holes Diameter 0.5mm x 25 holes

Power Dissipation

Thermal Resistance

0.56W 0.39W

θja=178.6°C/W

θja=256.4℃/W

0.6

Pd [W]

0.5

0.4

0.3

0.2

0.1

0.56W

0.39W

Evaluation Board 1

Standard ROHM Board

* Please design the margin so that PMAX

becomes is than Pd (PMAXPd) within the
usage temperature range.

0

0 25 50 75 100 125

Ta [℃]

85

Figure 287. SSON004X1010 Power dissipation heat reduction characteristics (Reference)

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38/41

2011.07 - Rev.C

BU□□TD2WNVX series

●Device Name and Marking

Device Name： BU□□TD2WNVX

a

Symbol Description

□□

10 1.0V typ. A
12 1.2V typ. B
15 1.5V typ. C
18 1.8V typ. D
1J 1.85V typ. E
19 1.9V typ. F
20 2.0V typ. G
2A 2.05V typ. r

a

21 2.1V typ. 0
23 2.3V typ. 1
25 2.5V typ. H
26 2.6V typ. J
27 2.7V typ. K
28 2.8V typ. L
2J 2.85V typ. M
29 2.9V typ. N
30 3.0V typ. P
31 3.1V typ. Q
32 3.2V typ. R
33 3.3V typ. U
34 3.4V typ. Y

Output

Voltage

Marking

Lot No.

4 VIN

1 VOUT

3 STBY

2 GND

Fig.288. Package dimension and Marking

Technical Note

Marking

Heatshink is

connected to GND

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39/41

2011.07 - Rev.C

BU□□TD2WNVX series

Technical Note

●Notes for use

1) About absolute maximum rating
Breakage may occur when absolute maximum ratings such as applied voltage and operating temperature range are
exceeded. Short mode or open mode cannot be specified at occurrence of a break, so please prepare physical safety
measures (e.g., fuse) if such special mode in which the absolute maximum rating is exceeded can be assumed.

2) About GND potential
Please be sure that the potential of the GND terminal is the lowest in any operating condition.

3) About thermal design
Please provide thermal design with sufficient margin, taking power dissipation (Pd) in actual usage conditions into
consideration.

4) About short between pins and misattachment
Please be careful regarding the IC direction and misalignment at attachment onto a printed circuit board. Misattachment
may cause a break of IC. Short caused by foreign matter between outputs, output and power supply, or GNDs may also
lead to a break.

5) About operation in a strong electromagnetic field
Please note that usage in a strong electromagnetic field may cause malfunction.

6) About common impedance
Please give due consideration to wiring of the power source and GND by reducing common-mode ripple or making ripple
as small as possible (e.g., making the wiring as thick and short as possible, or reducing ripple by LC), etc.

7) About STBY terminal voltage
Set STBY terminal voltage to 0.3 V or less to put each channel into a standby state and to 1.2 V or more to put each
channel into an operating state. Do not fix STBY terminal voltage to 0.3 V or more and 1.2 V or less or do not lengthen
the transition time. This may cause malfunction or failure.
When shorting the VIN terminal and STBY terminal for usage, the status will be “STBY=VIN=LOW” at turning the power
OFF, and discharge of the VOUT terminal cannot operate, which means voltage may remain for a certain time in the
VOUT terminal. Since turning the power ON again in this state may cause overshoot, turn the power ON for use after the
VOUT terminal is completely discharged.

8) About overcurrent protection circuit
Output has a built-in overcurrent protection circuit, which prevents IC break at load short. Note that this protection circuit
is effective for prevention of breaks due to unexpected accidents. Please avoid usage by which the protection circuit
operates continuously.

9) About thermal shutdown
Output is OFF when the thermal circuit operates since a temperature protection circuit is built in to prevent thermal
breakdown. However, it recovers when the temperature returns to a certain temperature. The thermal circuit operates at
emergency such as overheating of IC. Since it is prepared to prevent IC breakdown, please do not use it in a state in
which protection works.

Reverse current

 About reverse current

For applications on which reverse current is assumed to flow into IC,
it is recommended to prepare a path to let the current out by
putting a bypass diode between the VIN-VOUT terminals.

VIN

STBY

OUT

GND

Fig. 289. Example of bypass diode connection

 About testing on a set board

When connecting a capacitor to a terminal with low impedance for testing on a set board, please be sure to discharge for
each process since IC may be stressed. As a countermeasure against static electricity, prepare grounding in the assembly
process and take sufficient care in transportation and storage. In addition, when connecting a capacitor to a jig in a testing
process, please do so after turning the power OFF and remove it after turning the power OFF.

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40/41

2011.07 - Rev.C

BU□□TD2WNVX series

)

Technical Note

●Ordering part number

B U 1 2 T D 2 W N V X - T L

Part No. Output Voltage

SSON004X1010

1PIN MARK

0.6MAX

0.05

0.48±0.05

45º

0.32±0.1

0.48±0.05

0.25±0.05

10 : 1.0V
12 : 1.2V
15 : 1.5V
18 : 1.8V
1J : 1.85V
19 : 1.9V
20 : 2.0V
2A: 2.05V
21 : 2.1V
23 : 2.3V
25 : 2.5V
26 : 2.6V
27 : 2.7V
28 : 2.8V
2J : 2.85V
29 : 2.9V
30 : 3.0V
31 : 3.1V
32 : 3.2V
33 : 3.3V
34 : 3.4V

1.0±0.1

+0.03

0.65±0.05
3-C0.18

R0.05

1

423

0.07±0.1

1.0±0.1

−0.02

0.02

Line up

Package

NVX : SSON004X1010

Packaging and forming specification

TL: Embossed tape and reel

<Tape and Reel information>

Embossed carrier tapeTape

0.25±0.1

(0.12)

Quantity

S

(Unit : mm

Direction
of feed

5000pcs
TL

The direction is the 1pin of product is at the lower left when you hold

()

reel on the left hand and you pull out the tape on the left hand

Direction of feed

Reel

1pin

Order quantity needs to be multiple of the minimum quantity.

∗

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2011.07 - Rev.C

Notes

No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.

The content specied herein is subject to change for improvement without notice.

The content specied herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specications,
which can be obtained from ROHM upon request.

Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.

Great care was taken in ensuring the accuracy of the information specied in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.

The technical information specied herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.

The Products specied in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, ofce-automation equipment, commu­nication devices, electronic appliances and amusement devices).

The Products specied in this document are not designed to be radiation tolerant.

While ROHM always makes effor ts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.

Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, re or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, re control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.

The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel­controller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.

If you intend to export or ship overseas any Product or technology specied herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.

Notice

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More detail product informations and catalogs are available, please contact us.

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R1120

A