FA7764 Datasheet, PDF (5/18 Pages) Fuji Electric – FUJI Power Supply Control IC

4. Block diagram
FA7764
5. Description of the terminal functions
FA7764AN(SOP-8 E-Pad)
FA7764P(DIP-8)
Terminal
No.
1
2
3
4
5
6
7
8
1
CREG
VCC
8
1
CREG
VCC
8
2
ENB
3
RT
4
GND
Exposed PAD
on backside
OUT
7
VBIAS
6
IN
5
2
ENB
3
RT
4
GND
OUT
7
VBIAS
6
IN
5
Terminal
code
CREG
ENB
RT
GND
IN
VBIAS
OUT
VCC
Terminal function
Internal power supply output
ON/OFF control
(L, operation; H or open; standby mode)
Timing resister for the oscillator
Ground
Inverted input of error amplifier
Voltage input for internal power supply
VBIAS = up to 3.1 V; CREG is powered by VCC.
VBIAS: 3.1 V or more; CREG is powered by output
voltage.
Switching output
Power supply input
Remarks
Connect stabilization
capacitor
Supply from output voltage
Connect bypass capacitor
Fuji Electric Systems Co., Ltd.
AN-059E Rev.1.0
5
June.2010
http://www.fujielectric.co.jp/fdt/scd/