DESCRIPTION
●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.
●FEATURES
●• 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 kHz to 250 kHz for the LM5642 and 200 kHz to
●500 kHz for the LM5642X
●• 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
●• Independent Enable/Soft-start Pins Allow Simple Sequential Startup Configuration.
●• Adjustable Cycle-by-cycle Current Limit
●• Input Under-voltage Lockout
●• Output Over-voltage Latch Protection
●• Output Under-voltage Protection with Delay
●• Thermal Shutdown
●• Self Discharge of Output Capacitors when the Regulator is OFF
●• TSSOP and HTSSOP (Exposed PAD) Packages
