ROHM BU6655NUX Technical data

CMOS LDO Regulators for Portable Equipments

3ch CMOS LDO Regulators

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

●Description

BU6650NUX, BU6651NUX, BU6652NUX, BU6653NUX, BU6654NUX, BU6655NUX are high-performance 3ch FULL
CMOS regulator with 200-mA outputs, which is mounted on small package VSON008X2030(2.0 mm  3.0 mm  0.6 mm).
It has excellent noise characteristics and load responsiveness characteristics despite its low circuit current consumption of
120 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 1.5 V & 1.8 V products)

2) High ripple rejection: 70 dB (Typ., 1 kHz, VOUT≦1.8 V)

3) Compatible with small ceramic capacitor (CIN=2.2F, Co=1.0 F)

4) Low current consumption: 120 A

5) ON/OFF control pin (STBY) of output voltage

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

7) With built-in output discharge circuit

8) Adopting small package VSON008X2030

●Applications

Battery-powered portable equipment, etc.

●Line up matrix

■ 200 mA BU665□NUX Series

Product Name VOUT1 VOUT2 VOUT3 Package

BU6650NUX 2.8V 2.8V 1.8V

BU6651NUX 2.8V 1.8V 1.5V

BU6652NUX 2.8V 2.8V 1.5V

BU6653NUX 2.8V 1.8V 1.8V

BU6654NUX 3.3V 1.8V 1.5V

BU6655NUX 3.3V 2.8V 1.8V

VSON008X2030

No.11020EFT06

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2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

Technical Note

●Absolute maximum rating

Parameter Symbol Ratings Unit

Maximum applied power voltage VMAX -0.3 ~ +6.0 V

Power dissipation Pd 660*1 MW

Maximum junction temperature TjMAX +125 °C

Operational temperature range Topr -40 ~ +85 °C

Storage temperature range Tstg -55 ~ +125 °C

*1 PCB (70 mm  70 mm, thickness 1.6-mm glass epoxy) a standard ROHM board is implemented. Reduced to 6.6 mW/C when used at Ta=25C or higher.

●Recommended operating range (Do not exceed Pd.)

Parameter Symbol Ratings Unit

Input power supply voltage VIN 2.5 ~ 5.5 V

Maximum output current IMAX 200 mA

●Recommended operating conditions

Parameter Symbol

Input capacitor CIN 1.0*

Output capacitor CO 0.5*

*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

2.2 － μF A ceramic capacitor is recommended.

2

1.0 － μF A ceramic capacitor is recommended.

Unit Conditions

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2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

●Electrical characteristics

(Ta=25C, VIN=VOUT+1.0 V (VIN=3.5 V on VOUT=1.8 V and1.5 V products), STBY=1.5 V, CIN=2.2 F, C O=1.0 F, unless
otherwise specified)

Limits

Parameter Symbol

Min. Typ. Max.

Unit Conditions

Technical Note

VOUT

Output voltage VOUT

IIN1 - 40 95 μA

Operating current

Circuit current (at STBY) ISTBY - - 1 μA STBY=0 V

Ripple rejection RR 55

Input / Output
voltage difference

Line regulation VDL - 2 20 mV

IIN2 - 80 190 μA

IIN3 - 120 285 μA

VSAT

×0.99

VOUT

-25mV

- 360 720

- 300 600

- 220 460

VOUT

70

65

VOUT

×1.01

VOUT

+25mV

- dB

V

mV

IOUT=10 μA, VOUT≥2.5 V

IOUT=10 μA, VOUT<2.5 V

IOUT=0mA
STBY×1=1.5V, STBY×2=0V

IOUT=0mA
STBY×2=1.5V, STBY×1=0V

IOUT=0mA
STBY×3=1.5V

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

1.5 V≦VOUT≦1.8 V
VRR=-20dBv, fRR=1 kHz,
IOUT=10 mA

2.5 V≦VOUT
VOUT=2.8V

(VIN=0.98*VOUT, IOUT=200 mA)
VOUT=3.3V

(VIN=0.98*VOUT, IOUT=200 mA)
VOUT=3.3V

(VIN=0.98*VOUT, IOUT=150 mA)
VIN=VOUT+1.0 V to 5.5 V,

IOUT=10 μA

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

Over current protection
detection current

Output short-circuit current ISHORT 20 70 150 mA Vo=0 V

Output discharge resistance RDSC 20 50 80 Ω VIN=4.0 V, STBY=0 V

Standby pull down resistance RSTB 500 1000 2000 kΩ

ON VSTBH 1.5 - 5.5 V Output Voltage ON

Control Voltage

OFF VSTBL -0.3 - 0.3 V Output Voltage OFF

* This product does not have radiation-proof design.

ILMAX 220 350 700 mA Vo=VOUT*0.8

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2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

●Block diagram, recommended circuit diagram, and package dimensions (VSON008X2030)

VIN

CIN

STBY1

VREF

STBY

OCP

Device Mark a

VOUT1

COUT

Lot No.

STBY2

VREF

VOUT2

STBY

COUT

OCP

STBY3

VREF

VOUT3

STBY

COUT

OCP

Fig.1 Block diagram

Technical Note

Fig.2 Package dimensions

●Pin configuration diagram

PIN No. PIN NAME DESCRIPTION

1 VIN INPUT Pin

2 STBY1

3 STBY2

4 STBY3

OUTPUT1 CONTROL Pin

( High : ON, Low : OFF )

OUTPUT2 CONTROL Pin

( High : ON, Low : OFF )

OUTPUT3 CONTROL Pin

( High : ON, Low : OFF )

Series Name Device Mark a

BU6650NUX U 6 6 5 0
BU6651NUX U 6 6 5 1
BU6652NUX U 6 6 5 2
BU6653NUX U 6 6 5 3
BU6654NUX U 6 6 5 4
BU6655NUX U 6 6 5 5

Device Mark

5 GND GROUND Pin
6 VOUT3 OUTPUT3 Pin

7 VOUT2 OUTPUT2 Pin
8 VOUT1 OUTPUT1 Pin

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

2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

●Input/Output terminal equivalent circuit schematic

6,7,8pin (VOUT) 5pin (GND) 2,3,4pin (STBY) 1pin (VIN)

IN

V

VIN

VOUT

STBY

Fig.3 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.

Capacity value of ceramic capacitor - DC bias characteristics

10

0

-10

-20

-30

-40

-50

-60

-70

Capacitance Change [%]

-80

-90

-100

10-V wi thstand volt age
F char acter isti cs

00.511.5 22.533.54

Example

(

DC Bias Voltage [V]

Fig.4 Capacity – bias characteristics

●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.

100

10

ESR [Ω]

0.1

0.01

Unstable area

1

0 50 100 150 200

Stability area

IOUT [ mA]

Technical Note

)

10-V withstand voltag e
B1char acter ist ics
GRM 188B11A105KA61 D

10-V wi thstand vol tage
B characteristics

6.3-V withst and voltage
B char acteri sti cs

10-V withstand voltag e
F char acter isti cs

4-V withstand voltag e
X6S characteristi cs

Fig.5 Stability area characteristics (Example)

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2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

●Reference data total device (Ta=25ºC unless otherwise specified.)

Technical Note

50.00

40.00

30.00

20.00

Input Current (uA)

10.00

0.00

-40 -15 10 35 60 85

Temp ( °C)

Fig. 6 Iin1 vs. Temp

100.00

80.00

60.00

40.00

Input Current (uA)

20.00

0.00

-40 -15 10 35 60 85

Temp ( °C)

Fig. 7 Iin2 vs. Temp

1.000

0.900

0.800

0.700

0.600

0.500

0.400

0.300

0.200

Gnd Current (uA)

0.100

0.000

-0.1 00

-40 -15 10 35 60 85

Temp. (° C)

Fig. 9 Istby vs Temp (STBY)

VIN= 3.8V
STBY=0V

3.50

VIN= 3.8V

3.00

2.50

2.00

1.50

1.00

Output Voltage (V)

0.50

0.00

00.511.5

Temp.= 85°C
Temp.= 25°C
Temp.= -40°C

STBY Voltage (V)

Fig. 10 STBY Threshold

●Reference data Vo=3.3V (Ta=25ºC unless otherwise specified.)

3.5

3.0

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

00.511.522.533.544.555.5

Fig. 11 Output Voltage

Vin V oltage (V)

IO=0uA
IO=100uA
IO=50mA
IO=200mA

Temp.=25°C
VIN = STBY

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

3.2 3.3 3.4 3.5 3.6 3.7

Vin V oltage (V)

Fig. 12 Line Regulation

IO=0uA
IO=100uA
IO=50mA
IO=200mA

Temp=25°C
VIN = STBY

150.00

120.00

90.00

60.00

Input C ur rent (u A)

30.00

0.00

-40 -15 10 35 60 85

Temp ( °C)

Fig. 8 Iin3 vs. Temp

100

80

60

40

Gnd Cur rent (uA)

20

0

00.511.522.533.544.555.5

Temp.=-40°C
Temp.=25°C
Temp.=85°C

Vin V oltage (V )

Fig. 13 Circuit Current IGND

IO=0uA

VIN = STBY

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.=25°C

Temp.=85°C

VIN=0.98 x VOUT

STBY = 1.5V

Output Current (A)

Fig. 14 Dropout Voltage

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10

8

6

4

STBY C urr ent (uA)

2

0

00.51 1.522.533.54 4.555.5

Temp.=-40°C

V

STBY

Temp.=85°C

Temp.=25°C

VIN = STBY

Voltage (V )

Fig. 15 STBY Input Current Fig. 16 IOUT - IGND

120

110

100

90

80

70

60

Gnd Cur rent (uA)

50

40

0 0.05 0.1 0.15 0.2

Temp.=85°C

Temp.=25°C

Temp.=-40°C

Output Current (A )

2011.09 - Rev.F

VIN = 4.3V

STBY = 1.5V

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

Technical Note

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

0 0.05 0.1 0.15 0.2

Temp.=25°C

Temp.=85°C

Temp.=-40°C

VIN = 4.3V

STBY = 1.5V

3.50

3.00

2.50

2.00

1.50

1.00

Output Voltage (V)

0.50

0.00

0 0.1 0.2 0.3 0.4 0.5 0.6

Output Current (A)

Fig. 17 Load Regulation Fig. 19 STBY Threshold Fig. 18 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

50.00

40.00

30.00

20.00

Gnd Cur rent (uA)

10.00

0.00

-40 -15 10 35 60 85

VIN=5.5V

Output Current (A )

Temp. ( °C)

VIN=3.8V

VIN=4.3V

STBY = 1.5V

Temp=25

VIN=4. 3V

STBY=1.5V

Io=0mA

3.50

VIN= 4.3V

3.00

2.50

2.00

1.50

1.00

Output Voltage (V)

℃

0.50

0.00

00.511.5

Temp.=85°C
Temp.=25°C
Temp.=-40°C

STBY V oltage (V)

1.000

0.900

0.800

0.700

0.600

0.500

0.400

0.300

0.200

Gnd Cur rent (uA)

0.100

0.000

-0.1 00

-40 -15 10 35 60 85

VIN= 4.3V
STBY=0V

Temp. ( °C)

80

70

60

50

40

30

20

Ripple Rejection (dB)

10

Vin= 4.3V
Io=10mA
Ta = 2 5℃

0

0.1 1 10 100 1000

Frequency (kHz)

Fig. 23 Ripple Rejection VS Freq.

80

f=0.1kHz

f=10kHz

f=100kHz

f=1kHz

Co= 1.0 μF
Cin=none
Iout=10mA
temp=25℃

70

60

50

40

30

20

Ripple Rejection [dB]

10

0

3.3 4.3 5.3
Input Vo ltage VIN[V]

Fig. 24 Ripple Rejection VS VIN

Fig. 22 IGND vs Temp (STBY) Fig. 21 IGND vs Temp Fig. 20 VOUT vs Temp

1.8

1.6

1.4

1.2

Co=1.0μF
Cin=1.0μF
Iout=10mA
temp=25℃

1

0.8

0.6

0.4

0.2

Ou tput Noise Density [μV /√ H z]

0

0.1 1 10 100
Frequency f [kHz]

Fig. 25 Output Noise Spectral

Density VS Freq.

Fig. 26 Load Response

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Fig. 27 Load Response

2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

Fig. 28 Load Response Fig. 29 Load Response

Technical Note

Fig. 30 Load Response

Current Pulse=10kHz

Fig. 32 Load Response

Current Pulse=100kHz

Fig. 31 Load Response

Current Pulse=10kHz

Fig. 33 Load Response

Current Pulse=100kHz

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2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

Technical Note

Fig. 34 Start Up Time

Iout = 0mA

Fig. 35 Start Up Time

Iout = 200mA

Fig. 36 Start Up Time (STBY=VIN)

Iout = 0mA

Fig. 37 Start Up Time(STBY=VIN)

Iout = 200mA

Fig. 38 Discharge Time

Iout = 0mA

Fig. 39 VIN Response

Iout = 10mA

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2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

●Reference data Vo=2.8V (Ta=25ºC unless otherwise specified.)

3.5

3.0

2.5

2.0

1.5

1.0

Output Voltage (V)

0.5

0.0

00.511.522.533.544.555.5

Fig. 40 Output Voltage

Vin V oltage (V)

IO=0uA
IO= 100uA
IO=50mA
IO=200mA

Temp.=25°C

VIN = ST BY

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

2.7 2.8 2.9 3 3.1 3.2

IO=0uA
IO=100uA
IO=50mA
IO=200mA

Vin V oltage (V)

Fig. 41 Line Regulation

Temp.=25°C

VIN = STBY

100

IO=0uA

VIN = ST BY

80

60

40

Gnd Curr ent (uA)

20

0

00.511.522.533.544.555.5

Fig. 42 Circuit Current IGND

0.40

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

10

8

6

4

STBY C urr ent (uA)

2

0

Temp. =- 40°C

00.511.522.5 33.544.555.5

Temp.=85°C

Temp.=25°C

STBY Voltage (V)

VIN = STBY

120

110

100

90

80

70

60

Gnd Curr ent (uA)

50

40

0 0.05 0.1 0.15 0.2

Fig. 43 Dropout Voltage

Fig. 44 STBY Input Current Fig. 45 IOUT - IGND

Output Voltage (V)

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

Fig. 46 Load Regulation Fig. 47 OCP Threshold

Fig. 48 VOUT vs Temp

80

70

60

50

40

30

20

Ripple Rejection (dB)

10

0

0.1 1 10 100 1000

Vin= 3.8V
Io=10mA
Ta = 25 ℃

Frequency (kHz)

80

f=0.1kHz

70

60

50

f=1kHz

f=1 0kHz

40

30

20

Ripple Rejection [dB]

f=100kHz

10

0

2.8 3.8 4.8
Input Vol tage VIN[V]

Co=1.0μF
Cin=none
Iout=10mA
temp=25℃

1.6

1.4

1.2

1

0.8

0.6

0.4

0.2

Output Noise Density [μV/√Hz]

0

0.1 1 10 100

Fig. 49 Ripple Rejection VS Freq.

Fig. 50 Ripple Rejection VS VIN

Fig. 51 Output Noise Spectral

Density VS Freq.

Technical Note

Temp.=- 40°C

Temp.=25° C
Temp.=85° C

Vin Voltage ( V)

Temp. =85°C

Temp.=25°C

Temp. =- 40°C

VIN = 3.8V

STBY = 1.5V

Output Currnt (A )

VIN= 3.8V

STBY= 1.5V

Io=0.1mA

Temp. (°C)

Co=1.0μF
Cin=1.0μF
Iout=10mA
temp=25℃

Frequency f [kHz]

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2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

Fig. 52 Load Response

Fig. 53 Load Response

Fig. 54 Load Response

Fig. 55 Load Response

⇔

⇔

Fig. 56 Load Response

Current Pulse=10kHz

Fig. 57 Load Response

Current Pulse=10kHz

⇔

⇔

Fig. 58 Load Response

Current Pulse=100kHz

Fig. 59 Load Response

Current Pulse=100kHz

Technical Note

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2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

Fig. 60 Start Up Time

Iout = 0mA

Fig. 63 Start Up Time(STBY=VIN)

Iout = 200mA

Fig. 61 Start Up Time

Iout = 200mA

Fig. 64 Discharge Time

Iout = 0mA

Fig. 62 Start Up Time (STBY=VIN)

Technical Note

Iout = 0mA

Fig. 65 VIN Response

Iout = 10mA

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2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

●Reference data Vo=1.8V (Ta=25ºC unless otherwise specified.)

3.5

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

Vin V oltage (V )

Temp=25°C
VIN = STBY

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

1.75 1.85 1.95 2.05 2.15 2.25 2.35

Temp=25°C

VIN = STBY

IO=0uA
IO= 100uA
IO=50mA
IO=200mA

Vin V oltage (V)

100

80

60

40

Gnd Cur rent (uA)

20

0

00.511.522.533.544.555.5

Fig. 66 Output Voltage

Fig. 67 Line Regulation

Fig. 68 Circuit Current IGND

140

120

100

80

60

40

Gnd Cur rent (uA)

20

0

00.511.522.533.544.555.5

Temp=-40°C

Temp=25°C
Temp=85°C

Vin V oltage (V)

Fig. 69 Circuit Current IGND

IO=200mA

VIN = STBY

10

8

6

4

STBY C urr ent (uA)

2

0

00.51 1.522.533.54 4.555.5

Temp=-40°C

Temp=85°C

Temp=25°C

VIN = STBY

STBY Voltage (V )

Fig. 70 STBY Input Current Fig. 71 IOUT - IGND

120

110

100

90

80

70

60

Gnd Current (uA)

50

40

0 0.05 0.1 0.15 0.2

Output Voltage (V)

Output Voltage (V)

3.50

3.00

2.50

2.00

1.50

1.00

Output Voltage (V)

0.50

0.00

00.511.5

Fig. 72 Load Regulation Fig. 74 STBY Threshold Fig. 73 OCP Threshold

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 ( °C)

VIN= 3.5V

STBY=1.5V

Io=0.1mA

50.00

40.00

30.00

20.00

Input Curr ent (uA)

10.00

0.00

-40 -15 10 35 60 85

Temp ( °C)

VIN= 3.5V

STBY= 1.5V

Io=0mA

1.000

0.900

0.800

0.700

0.600

0.500

0.400

0.300

0.200

Gnd C urrent (uA)

0.100

0.000

-0.100

-40 - 15 10 35 60 85

Technical Note

Temp=-40°C

Temp=25°C
Temp=85°C

Vin V oltage (V)

Temp=25°C

Output Current (A)

Temp=85°C
Temp=25°C

Temp=-40°C

STBY V oltage (V)

Temp ( °C)

Temp=85°C

Temp= -40°C

IO=0uA

VIN = STBY

VIN = 3.5V

STBY = 1.5V

VIN= 3.5V

STBY= 0V

Fig. 75 VOUT vs. Temp

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Fig. 77 IGND vs. Temp (STBY) Fig. 76 IGND vs. Temp

2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

80

70

60

50

40

30

20

Ripple Rejection (dB)

10

0

0.1 1 10 100 1000

Vin= 3.5V
Io=10mA
Ta = 25℃

Frequency (kHz)

80

f=0 .1kHz

70

60

50

40

30

20

Ripple Rejection [dB]

10

0

2.5 3.5 4.5 5.5

f=1 kHz

f=10kHz

f=100kHz

Input Vol tage VIN[V]

Co=1.0μF
Cin=none
Iout=10mA
temp=25℃

0.7

0.6

0.5

0.4

0.3

0.2

0.1

Output Noise Density [μV/√Hz]

0

0.1 1 10 100

Fig. 78 Ripple Rejection VS Freq.

Fig. 79 Ripple Rejection VS VIN

Fig. 80 Output Noise Spectral

Density VS Freq.

Fig. 81 Load Response

Fig. 82 Load Response

Fig. 83 Load Response Fig. 84 Load Response

Technical Note

Co=1.0μF
Cin=1.0μF
Iout=10mA
temp=25℃

Frequency f [kHz]

⇔

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Fig. 85 Load Response

Current Pulse=10kHz

Fig. 86 Load Response

Current Pulse=10kHz

2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

⇔

Technical Note

Fig. 89 Start Up Time

Iout = 0mA

Fig. 92 Start Up Time(STBY=VIN)

Iout = 200mA

Fig. 87 Load Response

Current Pulse=100kHz

Fig. 90 Start Up Time

Iout = 200mA

Fig. 93 Discharge Time

Iout = 0mA

Fig. 88 Load Response

Current Pulse=100kHz

Fig. 91 Start Up Time (STBY=VIN)

Iout = 0mA

Fig. 94 VIN Response

Iout = 10mA

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

2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

●Reference data Vo=1.5V (Ta=25ºC unless otherwise specified.)

1.8

1.5

1.2

0.9

0.6

Output Voltage (V)

0.3

0.0

00.511.522.533.544.555.5

Fig. 95 Output Voltage Fig. 96 Line Regulation

IO=0uA
IO=100uA
IO=50mA
IO=200mA

Vin V oltage (V)

Temp=25°C
VIN = STBY

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

1.25 1.35 1.45 1.55 1.65 1.75 1.85 1.95 2.05 2.15 2.25

Temp= 25°C

VIN = STBY

IO=0uA
IO= 100uA
IO=50mA
IO=200mA

Vin V oltage (V)

100

80

60

40

Gnd Cur rent (uA)

20

0

00.511.522.533.544.555.5

Fig. 97 Circuit Current IGND

Technical Note

Temp=-40°C

Temp=25°C
Temp=85°C

Vin V oltage (V )

IO=0uA

VIN = STBY

140

120

100

80

60

40

Gnd Current (uA)

20

0

00.511.522.533.544.555.5

Temp=-40°C

Temp=25°C
Temp=85°C

Vin V oltage (V )

IO=200mA

VIN = STBY

10

8

6

4

STBY C urr ent (uA)

2

0

00.51 1.522.533.544.555.5

Temp= -40°C

Temp=85°C

Temp=25°C

STBY V oltage ( V)

VIN = STBY

120

110

100

90

80

70

60

Gnd Cur rent (uA)

50

40

0 0.05 0.1 0.15 0.2

Output Current (A )

Fig. 98 Circuit Current IGND Fig. 99 STBY Input Current Fig. 100 IOUT - IGND

Fig. 101 Load Regulation

3.50

Temp=25℃

3.00

2.50

2.00

1.50

1.00

Output Voltage (V)

0.50

0.00

0 0.1 0.2 0.3 0.4 0.5 0.6

VIN=5.5V

VIN=2.0V

Output Current (A)

Fig. 102 OCP Threshold

VIN=3.5V

STBY=1.5V

2.00

1.75

1.50

1.25

1.00

0.75

0.50

Output Voltage (V)

0.25

0.00

00.5 11.5

STBY V oltage (V)

Fig. 103 STBY Threshold

Temp=25°C

Temp=85°C
Temp=25°C

Temp=-40°C

Temp=85°C

Temp=-40°C

VIN = 3.5V

STBY = 1.5V

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

Temp ( °C)

VIN= 3.5V

STBY=1.5V

Io=0.1mA

50.00

40.00

30.00

20.00

Input Curr ent (uA)

10.00

0.00

-40 -15 10 35 60 85

Temp ( °C)

VIN= 3.5V

STBY=1.5V

Io=0mA

Fig. 104 VOUT vs. Temp

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

1.000

0.900

0.800

0.700

0.600

0.500

0.400

0.300

0.200

Gnd Cu rrent (uA)

0.100

0.000

-0.100

-40 - 15 10 35 60 85

Temp ( °C)

Fig. 106 IGND vs. Temp (STBY) Fig. 105 IGND vs. Temp

2011.09 - Rev.F

VIN= 3.5V

STBY= 0V

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

f

80

70

60

50

40

30

20

Ripple Rejection (dB)

10

0

0.1 1 10 100 1000

Fig. 107 Ripple Rejection vs. Freq.

Vin= 3.5V
Io=10mA
Ta = 25℃

Frequency (kHz)

80

=0.1kHz

70

60

50

40

30

20

Ripple Rejection [dB]

10

0

2.5 3.5 4.5 5.5

f=1kHz

f=10kHz

f=100kHz

Input Voltage VIN[V]

Co= 1.0 μF
Cin=none
Iout=10mA
temp=25℃

Fig. 108 Ripple Rejection vs. VIN

(Iout=10 mA)

0.7

0.6

0.5

0.4

0.3

0.2

0.1

Output Noise Density [μV/√ Hz]

0

0.1 1 10 100

Fig. 109 Output Noise Spectral Density

Fig. 110 Load Response Fig. 111 Load Response

Fig. 112 Load Response

Fig. 113 Load Response

Fig. 114 Load Response

Current Pulse=10 kHz

Fig. 115 Load Response

Current Pulse=10 kHz

Technical Note

Co=1.0μF
Cin=1.0μF
Iout =10 mA
temp=25℃

Frequency f [kHz]

vs. Freq.

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

2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

Fig. 116 Load Response

Current Pulse=100 kHz

Fig. 117 Load Response

Current Pulse=100 kHz

Fig. 118 Start-up Time

Iout = 0 mA

Fig. 121 Startup Time (STBY=VIN)

Iout = 200mA

Fig. 119 Start-up Time

Iout = 200 mA

Fig. 122 Discharge Time

Iout = 0 mA

Fig. 120 Start-up Time (STBY=VIN)

Fig. 123 VIN Response

Technical Note

Iout = 0 mA

Iout = 10 mA

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

2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

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 (P

MAX)

MAX=(VIN-VOUT1)×IOUT1(MAX.)＋(VIN-VOUT2)×IOUT2(MAX.)＋(VIN-VOUT3)×IOUT3(MAX.)

P

IN : Input voltage VOUT1,2,3 : Output voltage IOUT(MAX) : Maximum output current)

(V

0.7

0.6

0.66W

0.5

0.4

0.3

Pd [W]

0.2

0.1

0

0 25 50 75 100 125

Ta [℃]

85

* Please design the margin so that P

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

- Standard ROHM board ­Size: 70 mm  70 mm  1.6 mm
Material : Glass epoxy board

MAX

Fig.124 VSON008X2030 Power dissipation heat reduction characteristics (Reference)

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

2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

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 miss-attachment
Please be careful regarding the IC direction and misalignment at attachment onto a printed circuit board. Miss-attachment
may cause a break of IC. Short caused by foreign matter between outputs, output and power supply, or GND 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 1.5 V or more to put each
channel into an operating state. Do not fix STBY terminal voltage to 0.3 V or more and 1.5 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 V

IN-VOUT terminals.

Reverse current

VIN

OUT

STBY

GND

Fig.125 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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20/21

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

2011.09 - Rev.F

BU6650NUX,BU6651NUX,BU6652NUX,BU6653NUX,BU6654NUX,BU6655NUX

●Ordering part number

B U 6 5 5 0 N U X - T R

Part No. Part No.

6650
6651
6652
6653
6654
6655

VSON008X2030

2.0±0.1

0.6MAX

0.08 S

C0.25

0.3±0.1

0.25

1.5±0.1

0.5

1PIN MARK

+0.03

4

518

+0.05

0.25

−0.04

3.0±0.1

−0.02

0.02

S

(0.12)

1.4±0.1

(Unit : mm)

Package

NUX: VSON008X2030

<Tape and Reel information>

Embossed carrier tapeTape

Quantity

Direction
of feed

4000pcs
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

Packaging and forming specification
TR: Embossed tape and reel

1pin

Order quantity needs to be multiple of the minimum quantity.

∗

Direction of feed

Technical Note

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

2011.09 - Rev.F

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 injur y, 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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© 2011 ROHM Co., Ltd. All rights reserved.

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

ROHM Customer Support System

http://www.rohm.com/contact/

R1120

A