Epson Power Supply S1F70000 - Manual (Page 58)

S1F76540 Series
S1F70000 Series
EPSON 2–15
Technical Manual
S1F76540
Series
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 : 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
APPLICATIONS
• Power supply of medium- and small-capacity LCD
panels
• Regulated power supply of battery driven devices
S1F76540 Series Charge Pumping DC/DC Converter &
Voltage Regulator