SCI7661C Datasheet, PDF (1/9 Pages) Epson Company – DC-DC Converter

PF110-10
SCI7661COA/MOA
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DC-DC Converter
q 95% Typical Power Efficiency
q Doubled or Tripled Output Voltage
q Internal Voltage Regulator
s DESCRIPTION
The SCI7661C_OA/M_OACMOS DC-DC Converter features high operational performance with low power dissipation.
It consists of two major parts: the booster circuitry and the regulator circuitry. The booster generates a doubled
output voltage(–2.4 to –12V) or tripled output voltage(–3.6 to –18V) from the input (–1.2 to –6V). The regulator is
capable of setting the output to any desired voltage. The regulated voltage can be given one of the three threshold
temperature gradients.
s FEATURES
q High performance with low power dissipation
q Simple conversion of V_IN (–5V) to |V_IN| (+5V),
2 |V_IN| (+10V), 2V_IN (–10V) or 3V_IN(–15V)
q On-chip output voltage regulator
q Power conversion efficiency–Typ. 95%
q Temperature gradient for LCD power supply – 0.1% / °C, 0.4%/°C or 0.6%/ °C
q Power off by external signals – Stationary current at power off – Max. 2 µA
q Cascade connection–two device connected:
V_IN=–5V, V_OUT=–20V
q On-chip C'–R oscillator
q Package .................................... SCI7661C_0A: DIP-14pin(plastic)
SCI7661M_0A: SOP5-14pin(plastic)
s BLOCK DIAGRAM
SCI7661M_AA: SSOP2-16pin(plastic)
V_DD
OSC1
OSC2
V_IN
CAP1–
CAP1+
CAP2–
CAP2+
CR
Oscillator
Voltage
Converter
(I)
Voltage
Converter
(II)
Booster
Regurator
TC1
TC2
P_off
RV
V_reg
V_out