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S1F76600 Series CMOS DC/DC Converter (Voltage Doubler)
DESCRIPTION
The S1F76600 Series is a highly efficient CMOS DC/
DC converter for doubling an input voltage (from
–1.5V to –8V). This power-saving IC allows portable
computers and similar hand-held equipment to operate
from a single power supply, even when they incorporate
LSIs that operate at voltages different from those of
logic circuits, for example, LCD drivers and analog
LSIs.
The S1F76600C0B0 is available in 8-pin plastic DIPs,
and the S1F76600M0B0, in 8-pin plastic SOPs.
FEATURES
• 95% (Typ.) conversion efficiency
• Two output voltages, V
O
• 30mA maximum output current at 5V
• Connecting-in-series configuration obtains a higher
output voltage (V
=–5V, V
1
• Low operating voltage
• On-chip CR oscillator
• 8-pin plastic DIP and 8-pin plastic SOP
APPLICATIONS
• Fixed-voltage power supplies for battery-operated
equipment
• Power supplies for pagers, memory cards, calculators
and similar hand-held equipment
PIN DESCRIPTIONS
Pin No.
Pin name
1
NC
2
OSC2
3
OSC1
4
V
DD
5
CAP1+
6
CAP1–
7
V
O
8
V
I
S1F70000 Series
Technical Manual
, relative to V
and V
DD
I
=–15V at two-in-series).
0
No connection
Resistor connection. Open when using external clock
Resistor connection. Clock input when using external clock
Positive supply (system V
Positive charge-pump connection
Negative charge-pump connection
2 multiplier output
Negative supply (system ground)
EPSON
• Fixed-voltage power supplies for medical equipment
• Fixed-voltage power supplies for communications
equipment
• Uninterruptable power supplies
BLOCK DIAGRAM
V
DD
OSC1
CR oscillator
OSC2
V
I
Voltage converter
PIN ASSIGNMENTS
NC
1
OSC2
2
S1F76600M0B0
OSC1
3
V
4
DD
Description
)
CC
S1F76600 Series
CAP1+
CAP1–
V
O
8
V
I
7
V
O
6
CAP1–
/C0B0
5
CAP1+
1–1
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