S1f76600 series, Description, Features – Epson Power Supply S1F70000 User Manual
Page 18: Applications, Block diagram, Pin assignments, Pin descriptions, Block diagram pin assignments pin descriptions
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 V
DD
and V
I
• 30mA maximum output current at 5V
• Connecting-in-series configuration obtains a higher
output voltage (V
1
=–5V, V
0
=–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
4
V
DD
Positive supply (system V
CC
)
5
CAP1+
Positive charge-pump connection
6
CAP1–
Negative charge-pump connection
7
V
O
×
2 multiplier output
8
V
I
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