Pin Descriptions - Epson Power Supply IC S1F70000 Technical Manual

S1F71200 Series

PIN DESCRIPTIONS

Pin No. Pin name
1 V
DD1
2 V
DD2
3 EXO
4 V
O
5 SRC
6 I
REF
7 V
REF
8 (N.C)
9 POFFX
10 V
C
11 SWC
12 V
SW
13 V
SS
14 SSC
15 I
SENSE
16 SWO
4–44
Pin type Power system
Power supply
Power supply
Output
—
—
Output
Output
—
Input
Input
—
—
—
—
Input
Output
V Power pin 1 (+), Input power pin
DD1
Power pin 2 (+), Power pin for series regulator
V
DD2
circuit
V PNP transistor base drive pin for series regulator
DD2
— Step-up/step-down output feedback pin
Series regulator phase compensation capaci-
—
tor connection pin
Reference resistor connection pin. Connect a
V
DD1
100k resistor between the V
Reference voltage pin. Connect a 0.1 F
V
DD1
capacitance between the V
— No connection
Power off control pin.
V During normal operation : POFFX = V
DD1
At power off time
Step-up output voltage setting pin.
V For setting V
DD1
For setting V
Switching regulator phase compensation
—
capacitor connection pin
— Step-up output feedback pin
— Power pin (–), Ground pin
V Capacitor connection pin for soft start
DD1
V Overcurrent detection pin
DD1
V Step-up switching power transistor drive pin
DD1
EPSON
Description
pins.
SS
pins.
SS
: POFFX = V
= V + 1.0V : V
SW O C
= V + 0.5V : V
SW O C
S1F70000 Series
Technical Manual
DD1
SS
= V
DD1
= V
SS