Light Management Unit With 4 LDOs And SemPulse® Interface

The SC644 is a high efciency Charge Pump LED Driver using Semtech’s proprietary Charge Pump technology. Performance is optimized for use in single cell Li-ion battery applications. Display backlighting is provided through six matched current sinks with integrated fade-in and fade-out con- trols. The LEDs CAN be driven as a single set or as two diferent sets (for main and sub displays) with indepen- dent controls. Four low noise, low dropout (LDO) Regulators are provided to supply power for camera module I/O and other peripheral circuits. The SC644 uses the proprietary SemPulse® single wire Interface This Interface controls all functions of the device, including backlight currents and LDO voltage outputs. The single wire Interface minimizes Microcontroller and Interface pin counts. The SC644 enters sleep mode when all the LED Drivers are disabled. In this mode, the quiescent current is reduced while the device continues to monitor the SemPulse inter- face. Any combination of LDOs may be enabled when in sleep mode. By Semtech Corporation
SC644 's PackagesSC644 's pdf datasheet

SC644 Pinout, Pinouts
SC644 pinout,Pin out
This is one package pinout of SC644,If you need more pinouts please download SC644's pdf datasheet.

SC644 Application circuits
SC644 circuits
This is one application circuit of SC644,If you need more circuits,please download SC644's pdf datasheet.

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