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S1F76600 Series
S1F70000 Series EPSON 1–1
Technical Manual
S1F76600
Series
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, relative to VDD and VI
• 30mA maximum output current at 5V
• Connecting-in-series configuration obtains a higher
output voltage (V
1=–5V, V0=–15V at two-in-series).
• 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
• Fixed-voltage power supplies for medical equipment
• Fixed-voltage power supplies for communications
equipment
• Uninterruptable power supplies
BLOCK DIAGRAM
PIN ASSIGNMENTS
PIN DESCRIPTIONS
V
DD
OSC2
V
I
CAP1–
V
O
CAP1+
Voltage converter
CR oscillator
OSC1
Pin No. Pin name Description
1 NC No connection
2 OSC2 Resistor connection. Open when using external clock
3 OSC1 Resistor connection. Clock input when using external clock
4VDD Positive supply (system VCC)
5 CAP1+ Positive charge-pump connection
6 CAP1– Negative charge-pump connection
7VO ×2 multiplier output
8VI Negative supply (system ground)
S1F76600 Series CMOS DC/DC Converter (Voltage Doubler)
1
2
3
4
S1F76600M0B0
/C0B0
NC
OSC2
OSC1
V
DD
V
I
V
O
CAP1–
CAP1+
8
7
6
5