Application Circuit Examples - Epson Power Supply IC S1F70000 Technical Manual

S1F76540 Series

APPLICATION CIRCUIT EXAMPLES

Four-time Booster and Regulator
Figure 2.8 gives a wiring example of four-time booster
and regulator that is the typical S1F76540 application.
This example boosts the input voltage (V
V
Figure 2.8 Wiring example of 4-time booster and regulator
Setup conditions of Figure 2.8
• Internal clock : ON (Low Output mode)
• Booster circuit : ON
• Regulator : ON (if C
Power-off procedure
• Set the P pin to logical low (V
OFF1
Regulator
• For the regulator setup and notes, see the "voltage regulator circuit" section.
Application in other setup conditions
1 When used in the High Output mode
• Connect the FC pin to the V
2 When changing the temperature coefficient (C
• Change the TC1 and TC2 pin setup by following the definition of Table 2.7.
2–30
) four times in
I
+
REG
+
R1
V
DD
C
I
V
I
= –0.04%/ C)
T
) to turn off all circuits.
I
pin.
I
negative direction, and outputs the regulated voltage at
V pin.
REG
C
O
1 V
O
C
REG
2 V
RI
R2
3 V
REG
4 RV
5 V
DD
6 FC
+
7 TC1
8 TC2
)
T
EPSON
C2P 16
+
C2N 15
C2
C3N 14
C3
C1
C1N 13
+
+
C1P 12
V 11
I
P 10
OFF1
P 9
OFF2
S1F70000 Series
Technical Manual