DatasheetsPDF.com

SC631

Semtech
Part Number SC631
Manufacturer Semtech
Description Fixed 4.4V Output Charge Pump Regulator
Published May 12, 2013
Detailed Description SC631 Fixed 4.4V Output Charge Pump Regulator POWER MANAGEMENT Features „ „ „ „ „ „ „ „ „ „ „ Description The SC631 is ...
Datasheet PDF File SC631 PDF File

SC631
SC631

Overview
SC631 Fixed 4.
4V Output Charge Pump Regulator POWER MANAGEMENT Features „ „ „ „ „ „ „ „ „ „ „ Description The SC631 is a high-current voltage regulator using Semtech’s proprietary low-noise charge pump technology.
Performance is optimized for use in single Li-Ion battery cell applications.
The regulator provides the performance of a linear, low drop-out (LDO) voltage regulator when the input is greater than 4.
4V.
Unlike an LDO, dropout 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.
2μF bucket capacitors are required to deliver the full output current.
The charge pump provides a low EMI solution compared to inductive boost regulators.
The SC631’s 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 off 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 22μF output capacitor is used for decoupling the load and for smoothing mode transitions.
Hysteresis is provided to prevent chatter between charge pump modes.
The micro lead-frame package is both small and thermally efficient, measuring 2 x 2 x 0.
6 (mm).
Input voltage range — 2.
9V to 5.
5V VOUT tolerance — 4.
4V ±3% Continuous output current — 250mA Peak output current — 500mA Three charge pump modes: 1x, 1.
5x and 2x Output ripple ≤ 30mVPP for IOUT ≤ 400mA Short circuit, over-voltage, and over-temperature protection Soft-start functionality Shutdown current — 0.
1μA, typical Ultra thin package — 2 x 2 x 0.
6 (mm) Fully WEEE and RoHS compliant Applications „ „ „ „ „ „ „ „ Mobile phones Multi-LED backlit LCDs PMPs Digital video cameras Digital still cameras PDAs LED camera flash Audio amplifie...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)