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LM2742 Dataheets PDF



Part Number LM2742
Manufacturers National Semiconductor
Logo National Semiconductor
Description N-Channel FET Synchronous Buck Regulator Controller
Datasheet LM2742 DatasheetLM2742 Datasheet (PDF)

LM2742 N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages PRELIMINARY March 2004 LM2742 N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages General Description The LM2742 is a high-speed, synchronous, switching regulator controller. It is intended to control currents of 0.7A to 20A with up to 95% conversion efficiencies. Power up and down sequencing is achieved with the power-good flag, adjustable soft-start and output enable features. The LM.

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LM2742 N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages PRELIMINARY March 2004 LM2742 N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages General Description The LM2742 is a high-speed, synchronous, switching regulator controller. It is intended to control currents of 0.7A to 20A with up to 95% conversion efficiencies. Power up and down sequencing is achieved with the power-good flag, adjustable soft-start and output enable features. The LM2742 operates from a low-current 5V bias and can convert from a 1V to 16V power rail. The part utilizes a fixedfrequency, voltage-mode, PWM control architecture and the switching frequency is adjustable from 50kHz to 2MHz by setting the value of an external resistor. Current limit is achieved by monitoring the voltage drop across the onresistance of the low-side MOSFET, which enables on-times on the order of 40ns, one of the best in the industry. The wide range of operating frequencies gives the.


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