鈬?/div>
Negative)
s
DESCRIPTION
The SCI7660C
0B
/M
0B
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鈥nalog LSI
etc.) Its very low power requirement makes it ideal to supply handy equipments with power.
s
FEATURES
q
High performance with low power dissipation
q
Simple conversion of V
DD
(-5V) to +V
I
(+5V), -2V
I
(-10V)
q
Output current .......................... 30mA Max. (V
DD
= -5V)
q
Power conversion efficiency .... 95% Typ.
q
Cascade connection
(two device connected V
DD
= -5V, V
O
= -15V)
q
Low power ................................ Ideal for dry cell battery
q
On-chip CR oscillator
q
Package ................................... DIP-8pin (plastic)
SOP4-8pin (plastic)
s
BLOCK DIAGRAM
CAP1+
V
DD
OSC1
OSC2
V
1
CR Oscillator
CAP1鈥?/div>
Voltage Converter
V
0
s
VOLTAGE RELATIONS
V
CC
.................
V
DD
=0V
(+5V)
1st side
GND
.................
V
1
=鈥?V
(鈥?V)
.................
V
0
=2V
1
=鈥?0V
2nd side
s
PIN CONFIGURATION
NC
OSC2
OSC1
V
DD
1
2
3
4
8
7
6
5
V
1
V
0
CAP1鈥?/div>
CAP1+
s
PIN DESCRIPTION
Pin Name Pin No.
OSC1
OSC2
V
DD
CAP1+
CAP1鈥?/div>
V
O
V
I
3
2
4
5
6
7
8
Function
Oscillation resister connection terminal
Power supply terminal (positive, system supply V
CC
)
Terminal for connection of capacitor for booster (positive)
Terminal for connection of capacitor for booster (negative)
Output terminal at doubling
Power supply terminal (negative, system supply GND)
1
1
2
3
4
5
6
