Fixed 4.4V Output Charge Pump Regulator

The SC631 is a high-current voltage Regulator using Semtechs proprietary low-noise Charge Pump technol- ogy. Performance is optimized for use in single Li-Ion battery cell applications. The Regulator provides the per- formance of a linear, low drop-out (LDO) voltage Regulator when the input is greater than 4.4V. Unlike an LDO drop- out is avoided when the input is less than 4.4V. Instead, a Charge Pump is activated to provide voltage boost and the head-room needed for voltage regulation. Only two 2.2F bucket capacitors are required to deliver the full output current. The Charge Pump provides a low EMI solution compared to inductive boost Regulators The SC631s Charge Pump has three modes of operation: 2x, 1.5x, and 1x modes. The 2x and 1.5x modes deliver current to the load in each of two phases. The 1x mode turns of the Charge Pump delivering current through an LDO When active, the Charge Pump provides low-ripple operation at 200kHz, which is typically less than 30mVpp at the output. The SC631 is capable of delivering 250mA continuous current, with peak current to 500mA. A 22F output capacitor is used for decoupling the load and for smoothing mode transitions. Hysteresis is provided to prevent chatter between Charge Pump modes. By Semtech Corporation
SC631 's PackagesSC631 's pdf datasheet
SC631ULTRT




SC631 Pinout, Pinouts
SC631 pinout,Pin out
This is one package pinout of SC631,If you need more pinouts please download SC631's pdf datasheet.

SC631 Application circuits
SC631 circuits
This is one application circuit of SC631,If you need more circuits,please download SC631's pdf datasheet.


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