SCI7654C0A Datasheet | Epson Company

DESCRIPTION The SCI7654 is a highly efficient, but low power-consumption DC-to-DC converter based on the advanced CMOS technologies. It can generate an output voltage double/triple/quadruple times higher than the input (in negative direction) if 4/3/2 external capacitors are attached. With a built-in voltage regulator, the SCI7654 can provide a stable output by setting the DC/DC output to any voltage via two external resistors. This is optimum to the LCD panel power supply as the stable output can have the negative temperature gradient required for an LCD panel. FEATURES An input voltage can be boosted double/triple/quadruple to negative potential. Input voltages: - 2.4 to - 5.5V (quadruple boosting), - 2.4 to - 7.3V (triple boosting), - 2.4 to - 11.0V (double boosting) Excellent vol tage conversion efficiency: 95% (Typ.) Large output current: 20 m A (Max.) during quadruple boosting Built-in voltage regulator (for stable voltage output) Built-in reference voltage source for accurate regulation: - 1.5 ± 0.05V (CT0) Regulator output voltage temperature gradient function: - 0.04, - 0.15, - 0.35, - 0.55%/˚C Low current consumption: 130 µA (Typ.) Low standby current: 5.0 µA (Max.) Built-in oscillator circuit 5/6-time voltage boosting in negative potential by serial connection Package: SCI7654M0A SSOP2-16pin (plastic), SCI7654C0A DIP-16pin (plastic) BLOCK DIAGRAM VDD POFF1 POFF2 Power-Off Control Ref. Voltage Circuit TC1 TC2 Clock Generator Booster Control Voltage Regulator RV VREG VRI Voltage Converter VOUT C1P C1N C3N C2P C2N .. SCI7654M0A/C0A PIN CONFIGURATION SSOP2-16pin/DIP-16pin VOUT VRI VREG RV VDD FC TC1 TC2 1 2 3 4 5 6 7 8 16 C2P 15 C2N 14 C3N 13 C1N 12 C1P 11 VIN 10 POFF1 9 POFF2 PIN DESCRIPTION Pin No. 1 2 3 4 5 6 Pin Name VOUT VRI VREG RV VDD FC Voltage output Regulator input Regulator output Input for regulator output voltage adjustment Input voltage pin (Positive) Internal clock rate switch input, and clock input in serial/parallel...