Epson Power Supply S1F70000 - Manual (Page 27)

S1F76620 Series
1–10 EPSON
S1F70000 Series
Technical Manual
DESCRIPTION
S1F76620 is a high efficiency and low power consump-
tion CMOS DC/DC converter. It enables to obtain 2
times step-up output (3.0 to 16V) from input voltage
(1.5 to 8V). Also, S1F76620 enable to drive ICs (liquid
crystal driver, analog IC, etc.), which require another
power supply in addition to logic main power supply,
with a single power supply, and it is suitable for micro
power IC of hand-held computers, handy devices, etc.
due to its small power consumption.
FEATURES
(1) High efficiency and low power consumption
CMOS DC/DC converter
(2) Easy voltage conversion from input voltage V DD (5V)
to positive potential side or negative potential side
• Input V
DD (5V) to output –V DD (–5V),
2V DD (10V)
(3) Output current : Max. 30mA
(V DD = 5V)
(4) Power conversion efficiency : Typ. 95%
(5) Possibility of series connection
(In 2-piece use, V DD = 5V, V O = 15V)
(6) Low voltage operation : Suitable for
battery drive
(7) Built-in CR oscillator
(8) SOP4-8pin ······························ S1F76620M0A0
Bare Chip ······························· S1F76620D0A0
BLOCK DIAGRAM
V DD V O
CAP1+ CAP1–
OSC1
OSC2
P OFF
GND
Voltage conversion circuit
CR oscillator
S1F76620 Series CMOS DC/DC Converter (Voltage Doubler)