Description; Features; Applications - Epson Power Supply IC S1F70000 Technical Manual

S1F76540 Series Charge Pumping DC/DC Converter &
Voltage Regulator

DESCRIPTION

The S1F76540C0A0/M0A0 is a CMOS process,
charge-pumping DC/DC converter and voltage regula-
tor featuring the very high efficiency but low power
consumption. An addition of four, three, or two exter-
nal capacitors can generate four-, three- or two-time
output voltage in negative direction than the input volt-
age. Also, the built-in voltage regulator can set any out-
put voltage of DC/DC converter and can output the
regulated voltage using two external resistances. As the
regulator output can have a negative temperature gradi-
ent that is required for LCD panels, it is optimum for the
LCD panel power supply.

FEATURES

• Charge-pumping, DC-to-DC converter (four-, three-
or two-time negative boosting)
• Built-in voltage regulator (regulated voltage output
circuit)
• High power conversion
efficiency
• Low current consumption : 130 A (V
• High output capacity
S1F70000 Series
Technical Manual
: 95%
= –5.0 V
I
during four-time
boosting, Typ.)
: 20 mA (Max.)
EPSON
• Input voltages
• DC/DC converter output
voltage
• Built-in reference voltage for
high-precision regulator
• Temperature gradient
function of regulator
output voltages
• Low standby current
(during power-off)
• Power-off by the external signal
• Full built-in oscillator circuit
• Lineup

APPLICATIONS

• Power supply of medium- and small-capacity LCD
panels
• Regulated power supply of battery driven devices
S1F76540 Series
: –2.4 to –5.5 V (during
four-time boosting)
: 2.4 to –7.3 V (during
three-time boosting)
: 2.4 to –11 V (during
two-time boosting)
: |Input voltage| 4
(Max.)
: 1.5 0.05 V (at C )
T0
: – 0.04, – 0.15, – 0.35,
– 0.55 (%/ C)
: 5.0 A
: S1F76540M0A0,
16-pin SSOP
: S1F76540C0A0,
16-pin DIP
2–15