1. DESCRIPTION
S1F76540M0C Series Technical Manual
EPSON
1
(Rev.1.1)
1. DESCRIPTION
1.1 Description
S1F76540 consists of charge pump type DC/DC converter and voltage regulator with high efficiency and low
power consumption using the CMOS process.
The charge pump type DC/DC converter uses four (three or two) external capacitors to negatively generate the
output voltage, which is four times (triple or twice) higher than for the input voltage.
The voltage regulator uses two external resistors to set the output voltage generated by the DC/DC converter to
any value and supply the regulated output voltage. If necessary, you can provide the negative temperature
gradient characteristics to the regulated output voltage, and it is appropriate for LCD power.
S1F76540 turns the power off with an external signal, enabling you to reduce the wasteful current for system
suspension. It is therefore appropriate for battery-driven portable devices.
1.2 Features
•
Charge pump type DC/DC converter (negatively quadruple, triple, or double)
•
Built-in voltage regulator (voltage stabilization output circuit)
•
High-level conversion efficiency
･･････････
96
%
(VI= -5V, Typ.)
•
Low consumption current
････････････････
100mA (VI= -5V, At quadruple boosting, Typ.)
•
High output capability
･･･････････････････
20mA (Max.)
•
Input
voltage
range
･････････････････････
-2.4 to -5.5V (At quadruple boosting)
-2.4 to -7.3V (At 3rd boosting)
-2.4 to -11V (At double boosting)
•
DC/DC converter output voltage
･･････････
Input voltage
|
×
4 (At quadruple boosting, Max.)
•
Built-in for highly accurate regulator
･･･････
-1.5V
±
0.05V (At CT0)
standard voltage
•
Regulator output voltage temperature
･･･････
-0.05, -0.15, -0.35, -0.55 (
%
/
°
C)
gradient function
•
Standby current (At power-off)
････････････
5
µ
A (Max.)
•
Adding external parts enables quintuple or more high-magnification booster and regulator.
•
Power-off function by external signal
•
Completely-self-contained oscillation circuit
•
Compact and slim package product (SSOP2-16PIN)
•
This IC is not designed for strong radiation activity proof.
