SCI7660 Datasheet, PDF (1/6 Pages) Epson Company – DC-DC Converter

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PF1097-01
SCI7660C /M ^SCI760⁶B^0C0B/M0⁰B^B
DC-DC Converter
q 95% Typical Power Efficiency
q Doubled or Output Voltage
q Voltage Conversion (Positive ⇔ Negative)
s DESCRIPTION
The SCI7660C0B/M0B CMOS DC-DC Converter features high operational performance with low power dissipa-
tion. The booster generates a doubled output voltage from the input.
It is possible to drive the LSI that need another power supply than main power supply. (LCD drivers•Analog LSI
etc.) Its very low power requirement makes it ideal to supply handy equipments with power.
s FEATURES
s BLOCK DIAGRAM
q High performance with low power dissipation
q Simple conversion of VDD(-5V) to +VI(+5V), -2VI(-10V)
q Output current .......................... 30mA Max. (VDD = -5V)
q Power conversion efficiency .... 95% Typ.
q Cascade connection
VDD
OSC1
OSC2
CAP1+ CAP1–
CR Oscillator
(two device connected VDD = -5V, VO = -15V)
V1
q Low power ................................ Ideal for dry cell battery
Voltage Converter
V0
q On-chip CR oscillator
q Package ................................... DIP-8pin (plastic)
SOP4-8pin (plastic)
s VOLTAGE RELATIONS
1st side
VCC _{}
(+5V)
VDD=0V
GND ^{} V1=–5V
(–5V) ^{} V0=2V1=–10V
2nd side
s PIN CONFIGURATION
NC
1
OSC2 2
OSC1 3
VDD
4
8 V1
7 V0
6 CAP1–
5 CAP1+
s PIN DESCRIPTION
Pin Name Pin No.
Function
OSC1
OSC2
3
Oscillation resister connection terminal
2
VDD
4 Power supply terminal (positive, system supply VCC)
CAP1+ 5 Terminal for connection of capacitor for booster (positive)
CAP1– 6 Terminal for connection of capacitor for booster (negative)
VO
7 Output terminal at doubling
VI
8 Power supply terminal (negative, system supply GND)
1