L5973D013TR Description

Depending on the application requirements, the L5973D step-down monolithic power switching regulator can send more than 2 A of DC current to the load with a minimum switch current limit of 2.5 A. From 1.235 V to 35 V can be selected as the output voltage. The high current level is also made possible by an exposed-frame SO8 package, which allows for a reduction in Rth(j-amb) to about 40 °C/W.

To reduce the size of the external components, the device uses an internal P-channel D-MOS transistor (with a typical Rdson of 250 m) as the switching element. 250 kHz is the fixed switching frequency set by an internal oscillator.

L5973D013TR Features

• 2.5 A internal switch

• Operating input voltage from 4 V to 36 V

• 3.3 V / (±2%) reference voltage

• Output voltage adjustable from 1.235 V to 35 V

• Low dropout operation: 100 % duty cycle

• 250 kHz internally fixed frequency

• Voltage feedforward

• Zero load current operation

• Internal current limiting

• Inhibit for zero current consumption

• Synchronization

• Protection against feedback disconnection

• Thermal shutdown

L5973D013TR 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