LM5642, LM5642X
www.ti.com SNVS219K – JUNE 2003 – REVISED APRIL 2013 LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator
Synchronization
Check for Samples: LM5642, LM5642X FEATURES DESCRIPTION The LM5642 series consists of two current mode
synchronous buck regulator controllers operating
180В° out of phase with each other at a normal
switching frequency of 200kHz for the LM5642 and at
375kHz for the LM5642X. 1 2 Two Synchronous Buck Regulators
180В° Out of Phase Operation
200 kHz Fixed Nominal Frequency: LM5642
375 kHz Fixed Nominal Frequency: LM5642X
Synchronizable Switching Frequency from 150
kHz to 250 kHz for the LM5642 and 200 kHz to
500 kHz for the LM5642X
4.5V to 36V Input Range
50 ВµA 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
Independent Enable/Soft-start Pins Allow
Simple Sequential Startup Configuration. …
