ROHM BU34TD3WG Technical data

A

CMOS LDO Regulators for Portable Devices

1ch 200mA
CMOS LDO Regulators

BUTD3WG Series

●Description

BUTD3WG series is high-performance FULL CMOS regulator with 200-mA output, which is mounted on versatile
package SSOP5 (2.9 mm  2.8 mm  1.25 mm). It has excellent noise characteristics and load responsiveness
characteristics despite its low circuit current consumption of 35A. It is most appropriate for various applications such as
power supplies for logic IC, RF, and camera modules.

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 F)

4) Low current consumption: 35 A

5) ON/OFF control of output voltage

6) With built-in over current protection circuit and thermal shutdown circuit

7) With built-in output discharge circuit

●Applications

Battery-powered portable equipment, etc.

●Line up matrix

■200 mA BU□□TD3WG Series

Product Name 10 12 15 18 1J 19 20 21 25 26

○ ○ ○ ○ ○ ○ ○ ○ ○ ○

No.11020EAT11

Package

BU□□TD3WG

○ ○ ○ ○ ○ ○ ○ ○ ○ -

Model name: BU□□

a

Symbol

a

TD3WG

□□

10 1.0 V(Typ.) 19 1.9 V(Typ.) 27 2.7 V(Typ.) 31 3.1 V(Typ.)

12 1.2 V(Typ.) 20 2.0 V(Typ.) 28 2.8 V(Typ.) 32 3.2 V(Typ.)

15 1.5 V(Typ.) 21 2.1 V(Typ.) 2J 2.85 V(Typ.) 33 3.3 V(Typ.)

18 1.8 V(Typ.) 25 2.5 V(Typ.) 29 2.9 V(Typ.) 34 3.4 V(Typ.)

1J 1.85 V(Typ.) 26 2.6 V(Typ.) 30 3.0 V(Typ.) - -

Output

voltage (V)

□□

Contents

Specification of output voltage

Output

voltage (V)

□□

Output

voltage (V)

□□

SSOP5 27 28 2J 29 30 31 32 33 34 -

Output

voltage (V)

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2012.02 - Rev.

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BU□□TD3WG Series

Absolute maximum ratings

Parameter Symbol Ratings Unit

Maximum applied power voltage VMAX -0.3 ~ +6.5 V

Power dissipation Pd 540*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

Technical Note

Recommended operating conditions

Parameter Symbol

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.

Ratings

Min. Typ. Max.

(*2)

0.47 － μF

(*2)

0.47 － μF

Unit Conditions

A ceramic capacitor is
recommended.

A ceramic capacitor is
recommended.

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2012.02 - Rev.

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BU□□TD3WG 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

+25m

V

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

- 280 540 mV

- 260 500 mV

Dropout Voltage VSAT

- 240 460 mV

- 220 420 mV

Line Regulation VDL - 2 20 mV

VRR=-20dBv, fRR=1kHz,
IOUT=10mA

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 of each Output Voltage

(Ta=25℃, STBY=VIN, Cin=0.47μF, Co=0.47μF, unless otherwise noted.)

Output Voltage Parameter Min. Typ. Max. Unit

80 160 -

Conditions

VIN=1.7V

1.0, 1.2V
200 - - VIN=2.1V

Maximum

1.5V

output

current

60 120 - VIN=1.8V

mA

200 - - VIN=2.2V

1.8V, 1.85V, 1.9V, 2.0V, 2.1V 200 - - VIN=VOUT+0.6V

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2012.02 - Rev.

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BU□□TD3WG Series

Block diagram, recommended circuit diagram, and pin configuration diagram

BU□□TD3WG

VIN

Cin

VSTBY

VIN

GND

STBY

1

VREF

2

3

OCP

TSD

STBY

Discharge

VOUT

5

4

VOUT

Co

N.C.

PIN
No.

1 VIN Power input

2 GND Grounding

3 STBY

4 N.C. NO CONNECT

Technical Note

Symbol Function

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

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

Fig.1 Recommended circuit diagram

Input / Output terminal equivalent circuit schematic

5pin (VOUT) 2pin (GND) 3pin (STBY) 1pin (VIN)

IN

V

VOUT

Fig.2 Input / Output equivalent circuit

5 VOUT Voltage output

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2012.02 - Rev.

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BU□□TD3WG Series

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.

Technical Note

Capacity value of ceramic capacitor - DC bias characteristics

10

0

-10

-20

-30

-40

-50

-60

-70

Capacitance Change [%]

-80

-90

-100

10-V withstand voltag e
F char acteri sti cs

00.511.52 2.533.54

Fig.3 Capacity – bias characteristics

Cout=0.47μF Cin=0.47μF Temp=+25℃

100

10

1

ESR [Ω]

ESR　[Ω]

0.1

0.01

0 50 100 150 200

Fig.4 Stability area characteristics (Example)

Example

(

)

10-V wit hstand voltag e
B charac teri stic s

10-V wit hstand voltag e
F characteristics

DC Bias Voltage [V]

Unstable region

Stable region

IOUT [mA]

4-V wit hstand volt age
X6S character istic s

10-V withstand voltag e
B1charac teri sti cs
GRM188 B11A105KA61D

6.3-V withstand voltag e
B characteristi cs

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2012.02 - Rev.

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BU□□TD3WG Series

●Reference data BU12TD3WG (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)

VIN= STBY

100

Io=0uA

80

60

40

Gnd Current (uA)

20

0

00.511.522.533.544.555.5

Fig.5. Output Voltage

Fig.6. Line Regulation

Fig.7. Circuit Current IGND

1.6

1.4

1.2

1.0

0.8

0.6

0.4

STBY Pin Cu rrent (u A)

0.2

0.0

00.511.522.5 33.544.555.5

Temp=85°C

Temp=25°C

Temp=-40°C

Input Voltage (V)

Fig.8. VSTBY - ISTBY

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.9. IOUT - 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)

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

Output Current (A)

VIN=5.5V

VIN=2.5V

STBY= 1.5V

1.5

VIN= 2.5V

Io=0mA

1.0

Temp=25°C

0.5

Output Voltage (V)

Temp=85°C

0.0

00.511.5

Temp=-40°C

STBY V oltage (V )

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.11. OCP Threshold Fig.12. STBY Threshold Fig.13. VOUT - Temp

Technical Note

Temp=85°

Temp=25°C

Temp=-40°C

VIN= STBY

Input Voltage (V )

Temp=25°C

Temp ( °C)

Temp=85°C

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)

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

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© 2012 ROHM Co., Ltd. All rights reserved.

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)

6/42

VIN= 2.5V
STBY=0V

2012.02 - Rev.

A

BU□□TD3WG Series

p

g

(

)

p

g

(

)

p

(

)

●Reference data BU12TD3WG (Ta=25℃ unless otherwise specified.)

1.25

V
e

1.20

1.15

ut Volta

Out

1.10

IOUT=0mA→50mA

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

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

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

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

1.25

V
e

1.20

1.15

ut Volta

Out

1.10

Fig.22. Load Response

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7/42

Fig.21. Load Response

IOUT=100mA→50mA

Fig.23. Load Response

2012.02 - Rev.

Out

ut Current

100

50

mA

0

A

BU□□TD3WG Series

●Reference data BU12TD3WG (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

Iout=0mA

STBY=1.5→0V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

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

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

Fig.28. Discharge Time

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8/42

Fig.29. VIN Response

2012.02 - Rev.

A

BU□□TD3WG Series

●Reference data BU15TD3WG (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

Fig.33. VSTBY - ISTBY

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.34. IOUT - IGND

2.0

Temp=25°C

1.8

1.6

1.4

VIN=2.0V

1.2

1.0

0.8

0.6

Output Voltage (V)

0.4

0.2

0.0

0 0.1 0.2 0.3 0.4 0.5 0.6

Output Current (A )

VIN=2.5V

VIN=5.5V

STBY=1.5V

2.0

VIN= 3.8V

Io=0mA

1.5

1.0

Temp=25°C

Temp=85°C

0.5

Output Voltage (V)

0.0

00.511.5

STBY V oltage (V)

VIN= STBY

Temp=-40°C

Technical Note

100

IO=0uA VIN=ST BY

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

Fig.36. OCP Threshold

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)

Fig.39. IGND vs Temp Fig.40. IGND vs Temp (STBY)

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

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)

9/42

VIN= 2.5V
STBY=0V

2012.02 - Rev.

A

BU□□TD3WG Series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU15TD3WG (Ta=25℃ unless otherwise specified.)

1.55

V
e

1.50

1.45

ut Volta

Out

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

1.60

V
e

1.50

1.40

ut Volta

Out

1.30

Output Current (mA)

200

100

0

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

Output Voltage (V)

1.45

1.15

Fig.42. Load Response

IOUT=100mA→0mA

1.30

1.60

V

1.25

e

1.55

1.20

1.50

ut Volta

Output Voltage (V)

1.15

Out

1.45

Fig.44. Load Response

IOUT=200mA→0mA

1.40

1.70

V

1.30

e

1.60

1.20

1.50

ut Volta

Output Voltage (V)

Out

1.10

1.40

Output Current (mA)

100

100

50

50

0

0

Output Current (mA)

Output Current (mA)

100

100

50

50

0

0

Output Current (mA)

Output Current (mA)

200

200

100

100

0

0

Fig.45. Load Response

IOUT=50mA→100mA

1.55

V
e

1.50

1.45

ut Volta

Out

1.40

Output Current (mA)

100

50

0

1.60

V
e

1.55

1.50

ut Volta

Out

1.45

Fig.47. Load Response

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10/42

Fig.46. Load Response

IOUT=100mA→50mA

Fig.48. Load Response

2012.02 - Rev.

Output Current (mA)

100

50

0

A

BU□□TD3WG Series

●Reference data BU15TD3WG (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

Iout=0mA

STBY=1.5→0V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

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

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

Fig.53. Discharge Time

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11/42

Fig.54. VIN Response

2012.02 - Rev.

A

BU□□TD3WG Series

●Reference data BU18TD3WG (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

Fig.58. VSTBY - ISTBY

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.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

VIN=2.3V

Output Current (mA )

VIN=2.8V

Temp=25°C

STBY=1.5V

2.0

VIN= 3.8V

Io=0mA

1.5

1.0

Temp=25°C

Temp=85°C

0.5

Output Voltage (V)

0.0

0 0.5 1 1.5

STBY Voltage (V )

Fig.61. OCP Threshold Fig.62. STBY Threshold Fig.63. VOUT - Temp

VIN=ST BY

Temp=-40°C

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

Temp=-40°C

Input Voltage (V)

Temp=25°C

Temp=85°C

Output Current (A)

Temp ( °C)

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

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)

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

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© 2012 ROHM Co., Ltd. All rights reserved.

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)

12/42

VIN= 2.8V

STBY=0V

2012.02 - Rev.

A

BU□□TD3WG Series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU18TD3WG (Ta=25℃ unless otherwise specified.)

IOUT=0mA→50mA

1.85

V
e

1.80

1.75

ut Volta

Out

1.70

Output Current (mA)

100

50

0

Fig.66. Load Response

IOUT=0mA→100mA

1.85

V
e

1.80

1.75

ut Volta

Out

1.70

Output Current (mA)

100

50

0

Fig.68. Load Response

IOUT=0mA→200mA

1.90

V
e

1.80

1.70

ut Volta

Out

1.60

Output Current (mA)

200

100

0

Fig.70. Load Response

Technical Note

IOUT=50mA→0mA

1.90

V
e

1.85

1.80

ut Volta

Out

1.75

Fig.67. Load Response

IOUT=100mA→0mA

1.90

V
e

1.85

1.80

ut Volta

Out

1.75

Fig.69. Load Response

IOUT=200mA→0mA

2.00

V
e

1.90

1.80

ut Volta

Out

1.70

Fig.71. Load Response

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

IOUT=50mA→100mA

1.90

V
e

1.80

1.70

ut Volta

Out

1.60

Output Current (mA)

100

50

0

Fig.72. Load Response

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13/42

IOUT=100mA→50mA

1.85

V
e

1.80

1.75

ut Volta

Out

1.70

Output Current (mA)

100

50

0

Fig.73. Load Response

2012.02 - Rev.

A

BU□□TD3WG Series

●Reference data BU18TD3WG (Ta=25℃ unless otherwise specified.)

STBY=0→1.5V

STBY Voltage (V)

2.0

1.0

0.0

2.0

1.0

0.0

Output Voltage (V)

Fig.74. Start Up Time

Iout=0mA

VIN=STBY=0→2.8V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

4.0

2.0

0.0

Fig.76. Start Up Time

(VIN=STBY) Iout=0mA

Iout=0mA

STBY=1.5→0V

2.0

1.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

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

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

Fig.78. Discharge Time

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14/42

Fig.79. VIN Response

2012.02 - Rev.

A

BU□□TD3WG Series

)

●Reference data BU19TD3WG (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

00.511.522.5 33.544.555.5

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

Input Voltage (V)

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)

Fig.80. Output Voltage

Fig.81. 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

Fig.83. VSTBY - ISTBY

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.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

Output Current (A)

Fig.86. OCP Threshold

VIN=2.9V

VIN=2 .4V

Tem p=2 5°C

STBY=1.5V

2.0

VIN= 3.9V

Io=0mA

1.5

1.0

Temp=25°C

Temp=85°C

0.5

Output Voltage (V)

0.0

0 0.5 1 1.5

STBY Voltage (V )

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

VIN= STBY

Temp=-40°C

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

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)

VIN= 2.9V

STBY=0V

Fig.89. IGND - Temp Fig.90. IGND - Temp (STBY)

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© 2012 ROHM Co., Ltd. All rights reserved.

15/42

2012.02 - Rev.

A

BU□□TD3WG Series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU19TD3WG (Ta=25℃ unless otherwise specified.)

1.95

V
e

1.90

1.85

ut Volta

Out

1.80

IOUT=0mA→50mA

Output Current (mA)

100

50

0

Fig.91. Load Response

IOUT=0mA→100mA

1.95

V
e

1.90

1.85

ut Volta

Out

1.80

Output Current (mA)

100

50

0

Fig.93. Load Response

IOUT=0mA→200mA

2.00

V
e

1.90

1.80

ut Volta

Out

1.70

Output Current (mA)

200

100

0

Technical Note

IOUT=50mA→0mA

1.90

V
e

1.85

1.80

ut Volta

Out

1.75

Fig.92. Load Response

IOUT=100mA→0mA

1.90

V
e

1.85

1.80

ut Volta

Out

1.75

Fig.94. Load Response

IOUT=200mA→0mA

2.00

V
e

1.90

1.80

ut Volta

Out

1.70

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Fig.95. Load Response

IOUT=50mA→100mA

1.95

V
e

1.90

1.85

ut Volta

Out

1.80

Output Current (mA)

100

50

0

1.90

V
e

1.85

1.80

ut Volta

Out

1.75

Fig.97. Load Response

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16/42

Fig.96. Load Response

IOUT=100mA→50mA

Fig.98. Load Response

2012.02 - Rev.

Output Current (mA)

100

50

0

A

BU□□TD3WG Series

p

g

(

)

●Reference data BU19TD3WG (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

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

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

Fig.103. Discharge Time

Fig.104. VIN Response

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17/42

2012.02 - Rev.

A

BU□□TD3WG Series

●Reference data BU25TD3WG (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

Fig.108. VSTBY - ISTBY

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.109. IOUT - IGND

0.35

0.30

0.25

0.20

0.15

0.10

Dropout Voltage ( V)

0.05

0.00

0 0.05 0.1 0.15 0.2

Temp=25°C

Temp=-40°C

Output Current (A)

Temp=85°C

VIN = 0.98 x VOUT

STBY=1.5V

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

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

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

Fig.110. 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.113. STBY Threshold

Temp=-40°C

VIN= 3.5V

Io=0mA

Temp=25°C

Temp=85°C

Input Voltage (V)

Temp=25°C

Output Current (A)

STBY Voltage (V )

VIN= STBY

Temp=85°C

Temp=25°C

Temp=-40°C

VIN= 3.5V

STBY=1.5V

Temp=85°C

Temp=-40°C

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)

Fig.114. VOUT - Temp Fig.115. IGND - Temp Fig.116. IGND - Temp (STBY)

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© 2012 ROHM Co., Ltd. All rights reserved.

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)

18/42

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)

2012.02 - Rev.

VIN= 3.5V

STBY=0V

A

BU□□TD3WG Series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU25TD3WG (Ta=25℃ unless otherwise specified.)

IOUT=0mA→50mA

2.55

V
e

2.50

2.45

ut Volta

Out

2.40

Output Current (mA)

100

50

0

Fig.117. Load Response

IOUT=0mA→100mA

2.55

V
e

2.50

2.45

ut Volta

Out

2.40

Output Current (mA)

100

50

0

Fig.119. Load Response

IOUT=0mA→200mA

2.60

V
e

2.50

2.40

ut Volta

Out

2.30

Output Current (mA)

200

100

0

Technical Note

IOUT=50mA→0mA

2.55

V
e

2.50

2.45

ut Volta

Out

2.40

Fig.118. Load Response

IOUT=100mA→0mA

2.55

V
e

2.50

2.45

ut Volta

Out

2.40

Fig.120. Load Response

IOUT=200mA→0mA

2.60

V
e

2.50

2.40

ut Volta

Out

2.30

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Output Current (mA)

200

100

0

Fig.121. Load Response

IOUT=50mA→100mA

2.55

V
e

2.50

2.45

ut Volta

Out

2.40

Output Current (mA)

100

50

0

V
e

2.55

2.50

ut Volta

Out

2.45

Fig.123. Load Response

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19/42

Fig.122. Load Response

IOUT=100mA→50mA

Fig.124. Load Response

2012.02 - Rev.

Output Current (mA)

100

50

0

A

BU□□TD3WG Series

p

g

(

)

●Reference data BU25TD3WG (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

Iout=0mA

4.0

2.0

0.0

Output Voltage (V)

STBY=1.5→0V

STBY Voltage (V)

1.0

0

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

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

Fig.129. Discharge Time

Fig.130. VIN Response

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© 2012 ROHM Co., Ltd. All rights reserved.

20/42

2012.02 - Rev.

A

BU□□TD3WG Series

●Reference data BU26TD3WG (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

Fig.134. VSTBY - ISTBY

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.135. IOUT - IGND

0.35

0.30

0.25

0.20

0.15

0.10

Dropout Voltage ( V)

0.05

0.00

0 0.05 0.1 0.15 0.2

Temp=25°C

Temp=-40°C

Output Current (A)

Temp=85°C

VIN = 0.98 x VOUT

STBY=1.5V

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

VIN= STBY

VIN=3.1V

STBY=1.5V

Technical Note

100

IO=0uA

80

60

40

Gn d Cu rren t (uA )

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

Fig.136. 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.139. STBY Threshold

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 )

VIN=ST BY

Temp=85°C

Temp=25°C

Temp=-40°C

Temp=-40°C

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)

Fig.140. VOUT - Temp Fig.141. IGND - Temp Fig.142. IGND - Temp (STBY)

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© 2012 ROHM Co., Ltd. All rights reserved.

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)

21/42

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)

2012.02 - Rev.

VIN= 3.6V

STBY=0V

A

BU□□TD3WG Series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU26TD3WG (Ta=25℃ unless otherwise specified.)

IOUT=0mA→50mA

2.65

V
e

2.60

2.55

ut Volta

Out

2.50

Output Current (mA)

100

50

0

Fig.143. Load Response

IOUT=0mA→100mA

2.65

V
e

2.60

2.55

ut Volta

Out

2.50

Output Current (mA)

100

50

0

Fig.145. Load Response

IOUT=0mA→200mA

2.70

V
e

2.60

2.50

ut Volta

Out

2.40

Output Current (mA)

200

100

0

Technical Note

IOUT=50mA→0mA

2.70

V
e

2.65

2.60

ut Volta

Out

2.55

Fig.144. Load Response

IOUT=100mA→0mA

2.70

V
e

2.65

2.60

ut Volta

Out

2.55

Fig.146. Load Response

IOUT=200mA→0mA

2.80

V
e

2.70

2.60

ut Volta

Out

2.50

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Fig.147. Load Response

IOUT=50mA→100mA

2.65

V
e

2.60

2.55

ut Volta

Out

2.50

Output Current (mA)

100

50

0

2.62

V
e

2.61

2.60

ut Volta

Out

2.59

Fig.149. Load Response

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© 2012 ROHM Co., Ltd. All rights reserved.

22/42

Fig.148. Load Response

IOUT=100mA→50mA

Fig.150. Load Response

2012.02 - Rev.

Output Current (mA)

100

50

0

A

BU□□TD3WG Series

p

g

(

)

●Reference data BU26TD3WG (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

Iout=0mA

STBY=1.5→0V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

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

V
e

2.60

ut Volta

2.55

Out

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

Fig.155. Discharge Time

Fig.156. VIN Response

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© 2012 ROHM Co., Ltd. All rights reserved.

23/42

2012.02 - Rev.

A

BU□□TD3WG Series

●Reference data BU27TD3WG (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

Fig.160. VSTBY - ISTBY

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.161. IOUT - IGND

0.35

0.30

0.25

0.20

0.15

0.10

Dropout Voltage (V)

0.05

0.00

Temp=25°C

Temp=-40°C

0 0.05 0.1 0.15 0.2

Output Current (A)

Temp=85°C

VIN = 0.98 x VOUT

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

VIN=3 .6V

Output Current (A)

Fig.163. Dropout Voltage

Fig.164. OCP Threshold

VIN= STBY

VIN=3. 1V

Temp =25° C

STBY=1.5V

Technical Note

100

IO=0uA

80

60

40

Gn d Cu rren t (uA )

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

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 )

VIN=ST BY

Temp=85°C

Temp=25°C

Temp=-40°C

Temp=85°C

Temp=-40°C

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)

Fig.166. VOUT - Temp Fig.167. IGND - Temp Fig.168. IGND - Temp (STBY)

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© 2012 ROHM Co., Ltd. All rights reserved.

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)

24/42

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)

2012.02 - Rev.

VIN= 3.7V

STBY=0V

A

BU□□TD3WG Series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU27TD3WG (Ta=25℃ unless otherwise specified.)

IOUT=0mA→50mA

2.75

V
e

2.70

2.65

ut Volta

Out

2.60

Output Current (mA)

100

50

0

Fig.169. Load Response

IOUT=0mA→100mA

2.75

V
e

2.70

2.65

ut Volta

Out

2.60

Output Current (mA)

100

50

0

Fig.171. Load Response

IOUT=0mA→200mA

2.80

V
e

2.70

2.60

ut Volta

Out

2.50

Output Current (mA)

200

100

0

Fig.173. 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

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

IOUT=50mA→100mA

2.75

V
e

2.70

2.65

ut Volta

Out

2.60

Fig.175. Load Response

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© 2012 ROHM Co., Ltd. All rights reserved.

Output Current (mA)

100

50

0

IOUT=100mA→50mA

2.80

V
e

2.75

2.70

ut Volta

Out

2.65

Fig.176. Load Response

25/42

2012.02 - Rev.

Output Current (mA)

100

50

0

A

BU□□TD3WG Series

p
g

(

)

●Reference data BU27TD3WG (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

Iout=0mA

STBY=1.5→0V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

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

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

Fig.181. Discharge Time

Fig.182. VIN Response

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© 2012 ROHM Co., Ltd. All rights reserved.

26/42

2012.02 - Rev.

A

BU□□TD3WG Series

)

●Reference data BU28TD3WG (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

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

Fig.186. VSTBY - ISTBY

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.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

Output Current (A)

VIN = 0.98 x VOUT

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

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 )

Fig.185. Circuit Current IGND

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

VIN=ST BY

Temp=85°C

Temp=25°C

Temp=-40°C

Temp=-40°C

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)

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= 3.8V

STBY= 0V

Fig.192. VOUT - Temp Fig.193. IGND - Temp Fig.194. IGND - Temp (STBY)

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© 2012 ROHM Co., Ltd. All rights reserved.

27/42

2012.02 - Rev.

A

BU□□TD3WG Series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU28TD3WG (Ta=25℃ unless otherwise specified.)

2.85

V
e

2.80

2.75

ut Volta

Out

2.70

IOUT=0mA→50mA

Output Current (mA)

100

50

0

Fig.195. Load Response

IOUT=0mA→100mA

2.85

V
e

2.80

2.75

ut Volta

Out

2.70

Output Current (mA)

100

50

0

Fig.197. Load Response

IOUT=0mA→200mA

2.90

V
e

2.80

2.70

ut Volta

Out

2.60

Output Current (mA)

200

100

0

Technical Note

2.90

V
e

2.85

2.80

ut Volta

Out

2.75

Fig.196. Load Response

IOUT=100mA→0mA

2.90

V
e

2.85

2.80

ut Volta

Out

2.75

Fig.198. Load Response

IOUT=200mA→0mA

3.00

V
e

2.90

2.80

ut Volta

Out

2.70

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Fig.199. Load Response

IOUT=50mA→100mA

2.85

V
e

2.80

2.75

ut Volta

Out

2.70

Output Current (mA)

100

50

0

2.90

V
e

2.85

2.80

ut Volta

Out

2.75

Fig.201. Load Response

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28/42

Fig.200. Load Response

IOUT=100mA→50mA

Fig.202. Load Response

2012.02 - Rev.

Output Current (mA)

100

50

0

A

BU□□TD3WG Series

p

g

(

)

●Reference data BU28TD3WG (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

Iout=0mA

STBY=1.5→0V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

Technical Note

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

V
e

2.80

2.79

ut Volta

Out

2.78

STBY Voltage (V)

2.0

1.0

0.0

STBY Voltage (V)

4.0

2.0

0.0

Input Voltage (V)

5.8

4.8

3.8

Fig.207. Discharge Time

Fig.208. VIN Response

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© 2012 ROHM Co., Ltd. All rights reserved.

29/42

2012.02 - Rev.

A

BU□□TD3WG Series

Technical Note

●Reference data BU30TD3WG (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 3.13.23.33.4 3.53.6

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

Input Voltage (V)

VIN=ST BY

100

Io=0uA VIN= STBY

80

60

40

Gnd Curr ent (uA)

20

0

00.511.522.533.544.555.5

Input Voltage (V)

Temp=85°C

Temp=25°C

Temp=-40°C

Fig.209. Output Voltage

Fig.210. Line Regulation

Fig.211. 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

Fig.212. VSTBY - ISTBY

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 Current (A )

Fig.213. IOUT - 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

Temp=85°C

Output Current (A)

Fig.214. Load Regulation

0.30

0.25

0.20

0.15

0.10

Dropout Voltage ( V)

0.05

0.00

0 0.05 0.1 0.15 0.2

Temp=25°C

Temp=-40°C

Output Current (A)

Temp=85°C

VIN = 0.98 x VOUT

STBY=1.5V

3.5

3.0

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

VIN=5.5V

0 0.10.20.30.40.50.6

VIN=4.0V

VIN=3.5V

Temp=25°C

STBY= 1.5V

Output Current (A )

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

Temp=-40°C

STBY V oltage (V)

Fig.215. Dropout Voltage Fig.216. OCP Threshold Fig.217. STBY 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)

Fig.218. VOUT - Temp Fig.219. IGND - Temp Fig.220. IGND - Temp (STBY)

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© 2012 ROHM Co., Ltd. All rights reserved.

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)

30/42

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)

2012.02 - Rev.

VIN= 4.0V

STBY=0V

A

BU□□TD3WG Series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU30TD3WG (Ta=25℃ unless otherwise specified.)

IOUT=0mA→50mA

3.05

V
e

3.00

2.95

ut Volta

Out

2.90

Output Current (mA)

100

50

0

Fig.221. Load Response

IOUT=0mA→100mA

3.05

V
e

3.00

2.95

ut Volta

Out

2.90

Output Current (mA)

100

50

0

Fig.223. Load Response

IOUT=0mA→200mA

3.10

V
e

3.00

2.90

ut Volta

Out

2.80

Output Current (mA)

200

100

0

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

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Fig.225. Load Response

IOUT=50mA→100mA

3.05

V
e

3.00

2.95

ut Volta

Out

2.90

Output Current (mA)

100

50

0

3.10

V
e

3.05

3.00

ut Volta

Out

2.95

Fig.227. Load Response

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© 2012 ROHM Co., Ltd. All rights reserved.

31/42

Fig.226. Load Response

IOUT=100mA→50mA

Fig.228. Load Response

2012.02 - Rev.

Output Current (mA)

100

50

0

A

BU□□TD3WG Series

p

g

(

)

●Reference data BU30TD3WG (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

Iout=0mA

STBY=1.5→0V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

4.0

2.0

0.0

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

2.71

V
e

2.70

2.69

ut Volta

Out

2.68

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

Fig.233. Discharge Time

Fig.234. VIN Response

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© 2012 ROHM Co., Ltd. All rights reserved.

32/42

2012.02 - Rev.

A

BU□□TD3WG Series

Technical Note

●Reference data BU31TD3WG (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)

VIN=STBY

100

IO=0uA

80

60

40

Gnd Current (uA)

20

0

00.511.522.533.544.555.5

Input Voltage (V)

VIN=STBY

Temp=85°

Temp=25°

Temp=-40°C

Fig.235. Output Voltage

Fig.236. Line Regulation

Fig.237. 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

Fig.238. VSTBY - ISTBY

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.239. IOUT - IGND

3.15

VIN= 4.1V

STBY=1.5V

3.13

3.11

3.09

Output Voltage (V)

3.07

3.05

Temp=25°C

Temp=-40°C

0 0.05 0.1 0.15 0.2

Output Current (A)

Fig.240. Load Regulation

Temp=85°C

0.30

0.25

0.20

0.15

0.10

Dropout Voltage ( V)

0.05

0.00

Temp=25°C

Temp=-40°C

0 0.05 0.1 0.15 0.2

Output Current (A)

Temp=85°C

VIN = 0.98 x VOUT

STBY=1.5V

3.5

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

VIN=4.1V

Output Current (A)

VIN=3.6V

Temp=25°C

STBY=1.5V

3.5

VIN=4.1V

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

0 0.5 1 1.5

STBY Voltage (V)

Temp=-40°C

Fig.241. Dropout Voltage Fig.242. OCP Threshold Fig.243. STBY 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)

Fig.244. VOUT - Temp Fig.245. IGND - Temp Fig.246. IGND - Temp (STBY)

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© 2012 ROHM Co., Ltd. All rights reserved.

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)

33/42

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)

2012.02 - Rev.

VIN= 4.1V
STBY=0V

A

BU□□TD3WG Series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

●Reference data BU31TD3WG (Ta=25℃ unless otherwise specified.)

3.15

V
e

3.10

3.05

ut Volta

Out

3.00

IOUT=0mA→50mA

Output Current (mA)

100

50

0

Fig.247. Load Response

IOUT=0mA→100mA

3.15

V
e

3.10

3.05

ut Volta

Out

3.00

Output Current (mA)

100

50

0

Fig.249. Load Response

IOUT=0mA→200mA

3.20

V
e

3.10

3.00

ut Volta

Out

2.90

Output Current (mA)

200

100

0

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

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Fig.251. Load Response

IOUT=50mA→100mA

3.15

V
e

3.10

3.05

ut Volta

Out

3.00

Output Current (mA)

100

50

0

3.20

V
e

3.15

3.10

ut Volta

Out

3.05

Fig.253. Load Response

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© 2012 ROHM Co., Ltd. All rights reserved.

34/42

Fig.252. Load Response

IOUT=100mA→50mA

Fig.254. Load Response

2012.02 - Rev.

Output Current (mA)

100

50

0

A

BU□□TD3WG Series

p

g

(

)

●Reference data BU31TD3WG (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

Iout=0mA

STBY=1.5→0V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

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

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

Fig.259. Discharge Time

Fig.260. VIN Response

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© 2012 ROHM Co., Ltd. All rights reserved.

35/42

2012.02 - Rev.

A

BU□□TD3WG Series

●Reference data BU33TD3WG (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

Fig.264. VSTBY - ISTBY

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.265. IOUT - IGND

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

Output Current (A)

VIN = 0.98 x VOUT

STBY=1.5V

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 Fig.269. STBY Threshold

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)

Fig.266. Load Regulation

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)

Temp=85°C

Temp=25°C

Temp=-40°C

Temp=-40°C

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)

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

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© 2012 ROHM Co., Ltd. All rights reserved.

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)

36/42

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)

2012.02 - Rev.

VIN= 4.3V
STBY=0V

A

BU□□TD3WG Series

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p

g

(

)

p
g

(

)

●Reference data BU33TD3WG (Ta=25℃ unless otherwise specified.)

3.35

V
e

3.30

3.25

ut Volta

Out

3.20

IOUT=0mA→50mA

Output Current (mA)

100

50

0

Fig.273. Load Response

3.35

V
e

3.30

3.25

ut Volta

Out

3.20

IOUT=0mA→100mA

Output Current (mA)

100

50

0

Fig.275. Load Response

3.40

V
e

3.30

3.20

ut Volta

Out

3.10

IOUT=0mA→200mA

Output Current (mA)

200

100

0

Technical Note

IOUT=50mA→0mA

3.40

V
e

3.35

3.30

ut Volta

Out

3.25

Fig.274. Load Response

IOUT=100mA→0mA

3.40

V
e

3.35

3.30

ut Volta

Out

3.25

Fig.276. Load Response

IOUT=200mA→0mA

3.50

V
e

3.40

3.30

ut Volta

Out

3.20

Output Current (mA)

100

50

0

Output Current (mA)

100

50

0

Output Current (mA)

200

100

0

Fig.277. Load Response

IOUT=50mA→100mA

3.35

V
e

3.30

3.25

ut Volta

Out

3.20

Output Current (mA)

100

50

0

V
e

ut Volta

Out

Fig.279. Load Response

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© 2012 ROHM Co., Ltd. All rights reserved.

37/42

Fig.278. Load Response

IOUT=100mA→50mA

3.40

3.35

3.30

3.25

Fig.280. Load Response

Output Current (mA)

100

50

0

2012.02 - Rev.

A

BU□□TD3WG Series

p

g

(

)

●Reference data BU33TD3WG (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

Iout=0mA

STBY=1.5→0V

4.0

2.0

0.0

Output Voltage (V)

STBY Voltage (V)

2.0

1.0

0.0

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

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

Fig.285. Discharge Time

Fig.286. VIN Response

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BU□□TD3WG 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

Layout of Board for Measurement

Top Layer (Top View)

IC Implementation Position

Bottom Layer (Top View)

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

Board Material Glass epoxy resin (Double-side board)

Board Size 70 mm x 70 mm x 1.6 mm

Wiring Rate

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

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

Through Hole Diameter 0.5mm x 6 holes

Power Dissipation 0.54W
Thermal Resistance θja=185.2℃/W

0.6

[W]

Pd

0.5

0.4

0.3

0.2

0.54W

Standard ROHM

Board

* Please design the margin so that PMAX

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

0.1

Fig.287. SSOP5 Power dissipation heat reduction characteristics (Reference)

0

0 25 50 75 100 125

Ta [℃]

85

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2012.02 - Rev.

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BU□□TD3WG Series

●Device Name and Marking

Device Name: BUXXTD3WG

Symbol Description

a

●Package dimensions (SSOP5)

a

XX Output Voltage

10 1.0V typ. F0

12 1.2V typ. F1

15 1.5V typ. F2

18 1.8V typ. F3

1J 1.85V typ. F4

19 1.9V typ. F5

20 2.0V typ. F6

21 2.1V typ. F7

25 2.5V typ. F8

26 2.6V typ. F9

27 2.7V typ. G0

28 2.8V typ. G1

2J 2.85V typ. G2

29 2.9V typ. G3

30 3.0V typ. G4

31 3.1V typ. G5

32 3.2V typ. G6

33 3.3V typ. G7

34 3.4V typ. G8

Mark

Marking

Lot No.

( UNIT : mm )

Fig.288. Package dimensions

Technical Note

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2012.02 - Rev.

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BU□□TD3WG Series

Technical Note

Other notes

- 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.

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

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

- 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.

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

- 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.

- 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.

- About over current protection circuit
Output has a built-in over current 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.

- 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.

 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.

Reverse current

VIN

OUT

STBY

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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2012.02 - Rev.

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BU□□TD3WG Series

●Ordering part number

B U 1 0 T D 3 W G - T R

ROHM type

Output voltage

10 : 1.0V
12 : 1.2V
15 : 1.5V
18 : 1.8V
1J : 1.85V
19 : 1.9V
20 : 2.0V
21 : 2.1V
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

Series

SSOP5

<Tape and Reel information>

Quantity

Direction
of feed

2.8±0.2

1.25Max.

1.1±0.05

°

S

+0.05

−0.04

4

0.13

+

6

°

°

−4

0.2Min.

+0.05

−0.03

2.9±0.2

5

4

+0.2

−0.1

1.6

12

3

0.42

0.95

0.05±0.05

0.1 S

(Unit : mm)

Package
G: SSOP5

Embossed carrier tapeTape
3000pcs

TR

The direction is the 1pin of product is at the upper right when you hold

()

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

Reel

Order quantity needs to be multiple of the minimum quantity.

∗

Technical Note

Packaging and forming specification
TR : Embossed tape and reel

1pin

Direction of feed

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2012.02 - Rev.

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 efforts 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 injur y (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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Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.

ROHM Customer Support System

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R1120

A