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 emperature 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 mA (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)