PF754-03
SCI7654M
0A
/C
0A
DC/DC Converter
Double/Triple/Quadruple Boosting
95% Excellent Power Conversion Efficiency
Built-in Voltage Regulator
DESCRIPTION
The SCI7654 is a highly efficient, but low power-consumption DC-to-DC converter based on the advanced CMOS
technologies. It can generate an output voltage double/triple/quadruple times higher than the input (in negative
direction) if 4/3/2 external capacitors are attached.
With a built-in voltage regulator, the SCI7654 can provide a stable output by setting the DC/DC output to any voltage
via two external resistors. This is optimum to the LCD panel power supply as the stable output can have the negative
temperature gradient required for an LCD panel.
FEATURES
An input voltage can be boosted double/triple/quadruple to negative potential.
Input voltages: –2.4 to –5.5V (quadruple boosting), –2.4 to –7.3V (triple boosting), –2.4 to –11.0V (double
boosting)
Excellent vol tage conversion efficiency: 95% (Typ.)
Large output current: 20 mA (Max.) during quadruple boosting
Built-in voltage regulator (for stable voltage output)
Built-in reference voltage source for accurate regulation: –1.5
±0.05V
(CT0)
Regulator output voltage temperature gradient function: –0.04, –0.15, –0.35, –0.55%/˚C
Low current consumption: 130
µA
(Typ.)
Low standby current: 5.0
µA
(Max.)
Built-in oscillator circuit
5/6-time voltage boosting in negative potential by serial connection
Package: SCI7654M
0A
SSOP2-16pin (plastic), SCI7654C
0A
DIP-16pin (plastic)
BLOCK DIAGRAM
V
DD
POFF1
POFF2
Power-Off
Control
Ref. Voltage
Circuit
TC1
TC2
FC
Clock
Generator
Booster Control
Voltage Regulator
RV
V
REG
V
RI
V
IN
Voltage Converter
V
OUT
C1P
C1N
C3N
C2P
C2N
EPSON [ EPSON COMPANY ]
