Description:
The L5972D is a step down monolithic power switching regulator with a minimum switch current
limit of 2A so it is able to deliver more than 1.5A DC current to the load depending on the
application conditions. The output voltage can be set from 1.235V to 35V. The device uses an internal P-Channel D-MOS transistor (with a typical Rdson of 250mΩ) as switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency
at 250kHz. Having a minimum input voltage of 4.4V only, it is particularly suitable for 5V bus, available in all computer related applications. Pulse by pulse current limit with the internal
frequency modulation offers an effective constant current short circuit protection.
Features
■ 2A internal switch
■ Operating input voltage from 4.4V to 36V
■ Output voltage adjustable from 1.235V to 35V
■ Low dropout operation: 100% duty cycle
■ 250kHz Internally fixed frequency
■ Voltage feedforward
■ Zero load current operation
■ Internal current limiting
■ Protection against feedback disconnection
■ Thermal shutdown
Applications
■ Consumer: STB, DVD, TV, VCR, car radio,LCD monitors
■ Networking: XDSL, modems, DC-DC modules
■ Computer: printers, audio/graphic cards,optical storage, hard disk drive
■ Industrial: changers, car battery, DC-DC converters
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Datasheet