SC194A Datasheet PDF | Semtech Corporation

Semtech Corporation SC194A

The SC194A is a synchronous step-down converter with integrated power devices. The SC194A is designed for single-cell Li-Ion battery applications, but can also be used in ﬁxed 3.3V or 5V applications. The switching frequency is nominally set to 1MHz, allowing the use of small inductors and capacitors.

Part No.	SC194A
Datasheet	SC194A Download
Manufacturer	Semtech Corporation
Description	1A Synchronous Buck Converter
Buy	Stock & Price

DESCRIPTION

The 1.3A maximum current rating of the internal MOSFET switches allows a DC output current of 1A. The SC194A has a ﬂexible clocking methodology that allows it to be synchronized to an external oscillator or controlled by the internal oscillator. The device can operate in either forced PWM mode or in PSAVE mode. If PSAVE mode is enabled the part will automatically enter PFM at light loads to maintain maximum efﬁciency across the full load range. For noise sensitive applications, PSAVE mode can be disabled by synchronizing to an external oscillator, or pulling the SYNC/PWM pin high. Shutdown turns off all the control circuitry to achieve a typical shutdown current of 0.1μA.

FEATURES

Up to 93% efﬁciency Output current - 1A Input range - 2.7V to 5.5V Quiescent current - 17μA Four selectable output voltages Dynamic voltage positioning capability Fixed 1MHz frequency or 750kHz to 1.25MHz synchronized operation PSAVE operation to maximize efﬁciency at l...