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S1F76640 Series
S1F70000 Series EPSON 2–47
Technical Manual
S1F76640
Series
Recommended Operating Conditions
Note 1 : All voltages are based on the GND being 0V.
Note 2 : The figure below shows the recommended circuit for operation with low voltages (V
DD=1.8 to 2.2V):
Figure 6-2-1 Recommended Circuit Diagram for Low Voltage Operation (Example of 4 times
step-up circuit)
Note 3 : R
Lmin varies with input voltage. See Characteristics Graph (15).
Parameter Symbol
Rating
Unit Remarks
Min. Max.
Step-up start voltage
VSTA1 1.8 — V ROSC=1MΩ, C4≥10µF
C
L/C4≤1/20
Note 2
VSTA2 2.2 — V ROSC=1MΩ
Step-up stop voltage
VSTP — 1.8 V ROSC=1MΩ
Output load resistance
RL RLmin Note 3) — Ω —
Output load current
IO —20mA —
Oscillation frequency
fOSC 10 30 kHz —
External resistor ROSC 680 2000 kΩ —
for oscillation
Step-up capacitor
C1,C2,C3,C4
3.3 — µF—
Stabilization output
RRV 100 1000 kΩ —
regulation resistance
1
2
3
4
5
6
7
8
RV
V
REG
TC1
TC2
P
OFF
VSS
OSC1
OSC2
V
RI
VO
CAP3+
CAP2+
CAP2–
CAP1+
CAP1–
V
DD
16
15
14
13
12
11
10
9
V
I
C2 C4
C1
C3
+
+
+
–
D
1
RL
CL
(D1(VF(1F=1mA) is recommended to be not more than 0.6V.)
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