Technical Note

2/14

www.rohm.com

2011.05 - Rev.A

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

BD9775FV

●

Electrical characteristics (Ta=25℃, VCC=13.2V, fosc=100kHz, CTL1=3V, CTL2=3V)

Parameter

Symbol

Limits

Unit

Condition

Min.

Typ.

Max.

【

Whole Device】

Stand-by Current

Iccst

－

－

5

µA

CTL1,CTL2=0V

Circuit Current

Icc

2.5

4.2

7

mA

FB1,FB2=0V

【

Reference Voltage】

VREF Output Voltage

Vref

2.97

3.00

3.03

V

Io=-1mA

Line Regulation

DVli

－

－

10

mV

Vcc=7 to 18V,Io=-1mA

Load Regulation

DVlo

－

－

10

mV

Io=-0.1mA to -2mA

Short Output Current

Ios

-60

-22

-5

mA

【

Internal Voltage Regulator】

VREGA Output Voltage

Vrega

4.5

5.0

5.5

V

Switching with COUT=5000pF

VREGB Output Voltage

Vregb

VCC-5.5

VCC-5.0

VCC-4.5

V

Switching with COUT=5000pF

VREGB Dropout Voltage

Vdregb

－

1.8

2.2

V

VREGB to GND Voltage

【

Oscillator】

Oscillating Frequency

fosc

90

100

110

kHz

RT=27kΩ,CT=470pF

Frequency Tolerance

Dfosc

－

－

2

%

Vcc=7 to 18V

【

Synchronized Frequency】

Synchronized Frequency

fosc2

－

120

－

kHz

FIN=120kHz

FIN Threshold Voltage

Vthfin

1.2

1.4

1.6

V

FIN Input Current

IFIN

-1

－

1

µA

VFIN=1.4V

【

Error Amplifier】

Threshold Voltage

Vthea

0.98

1.00

1.02

V

INV Input Bias Current

Ibias

-1

－

1

µA

Voltage Gain

Av

－

70

－

dB

DC

Band Width

Bw

－

2.0

－

MHz

Av=0dB

Maximum Output Voltage

Vfbh

2.2

2.4

2.6

V

INV=0.5V

Minimum Output Voltage

Vfbl

－

－

0.1

V

INV=1.5V

Output Sink Current

Isink

0.5

2

5.2

mA

FB1,2 Terminal

Output Source Current

Isource1

-170

-110

-70

µA

FB1 Terminal

Isource2

-200

-130

-85

µA

FB2 Terminal