Selectable 3.6V/3.3V/3.0V/2.5V 1A Synchronous Buck Converter
Selectable 3.6V/3.3V/3.0V/2.5V www.DataSheet4U.com 1A Synchronous Buck Converter
POWER MANAGEMENT Description
The SC194B...
Description
Selectable 3.6V/3.3V/3.0V/2.5V www.DataSheet4U.com 1A Synchronous Buck Converter
POWER MANAGEMENT Description
The SC194B is a synchronous step-down converter with integrated power devices. Four selectable output voltages suitable for portable device interface, memory function blocks, and 5V to 3.3V voltage conversion are available. Automatic selection of Power Save Mode (PSAVE) is supported which enhances efficiency. A 100% duty cycle mode allows operation for input voltages close to the required output voltage. The need for external components is minimized by providing internal feedback compensation, and allowing selection of the required output voltage by hard wiring VID code inputs. The maximum current rating of the internal MOSFET switches allows a DC output current of 1A. The switching frequency is nominally set to 1MHz, allowing the use of small inductors and capacitors. A flexible clocking scheme is used that allows synchronization to an external oscillator or control 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 PSAVE 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.
SC194B
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