Epson S1F70000 User Manual

S1F70000 Series

2–15

Technical Manual

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.

• 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

: 95%

• Low current consumption : 130 

µ

A (V

I 

= –5.0 V

during four-time
boosting, Typ.)

• High output capacity

: 20 mA (Max.)

• Input voltages

: –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)

• DC/DC converter output

voltage

: |Input voltage| 

×

 4

(Max.)

• Built-in reference voltage for

high-precision regulator

: 1.5 

±

 0.05 V (at C

T0

)

• Temperature gradient

function of regulator
output voltages

: – 0.04, – 0.15, – 0.35,

– 0.55 (%/

°

C)

• Low standby current

(during power-off)

: 5.0 

µ

A

• Power-off by the external signal
• Full built-in oscillator circuit
• Lineup

: S1F76540M0A0,

16-pin SSOP

: S1F76540C0A0,

16-pin DIP

• Power supply of medium- and small-capacity LCD

panels

• Regulated power supply of battery driven devices