LM5642 Overview
The LM5642 series consists of two current mode synchronous buck regulator controllers operating 180° out of phase with each other at a normal switching frequency of 200kHz for the LM5642 and at 375kHz for the LM5642X. Out of phase operation reduces the input RMS ripple current, thereby significantly reducing the required input capacitance. The switching frequency can be synchronized to an external clock between 150...
LM5642 Key Features
- 2 Two Synchronous Buck Regulators
- 180° Out of Phase Operation
- 200 kHz Fixed Nominal Frequency: LM5642
- 375 kHz Fixed Nominal Frequency: LM5642X
- Synchronizable Switching Frequency from 150
- 4.5V to 36V Input Range
- 50 µA Shutdown Current
- Adjustable Output from 1.3V to 90% of Vin
- 0.04% (Typical) Line and Load Regulation Accuracy
- Current Mode Control with or without a Sense Resistor
