DatasheetsPDF.com

SC194B

Semtech
Part Number SC194B
Manufacturer Semtech
Description Selectable 3.6V/3.3V/3.0V/2.5V 1A Synchronous Buck Converter
Published May 1, 2010
Detailed Description Selectable 3.6V/3.3V/3.0V/2.5V www.DataSheet4U.com 1A Synchronous Buck Converter POWER MANAGEMENT Description The SC194B...
Datasheet PDF File SC194B PDF File

SC194B
SC194B

Overview
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 Features ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ ‹ Up to 95% efficiency PSAVE operation to maximize efficiency Output current — 1A Input range — 2.
7V to 5.
5V Four selectable output voltages Quiescent current — 17μA in PSAVE Dynamic voltage positioning capability Fixed 1MHz frequency or 750kHz to 1.
25MHz synchronized operation Current mode operation for excellent line and load transient response 100% duty cycle in dropout Soft-start Over-temperature and short-circuit protection Lead-free package — 3mm x 3mm MLPD Applications ‹ ‹ ‹ ‹ ‹ ‹ ‹ PDA Pocket...


Similar Datasheet


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