L5973D Description

The STMicroelectronics L5973D is a step-down monolithic power switching regulator with a minimum switch current limit of 2.5 A, allowing it to provide more than 2 A DC current to the load depending on the application conditions. The L5973D uses an internal P-Channel D-MOS transistor (with a type of 200 m?) as a switching element to avoid the use of a bootstrap capacitor and guarantee high efficiency.

L5973D Features

• Zero loads current operation

• Internal current limiting

• Inhibit for zero current consumption

• Output voltage adjustable from 1.235 V to 35 V

• Low dropout operation: 100 % duty cycle

• 250 kHz internally fixed frequency

• Voltage feedforwardSynchronization

• 2.5 A internal switch

• Operating input voltage from 4 V to 36 V

• 3.3 V / (±2%) reference voltage

• Synchronization

• Protection against feedback disconnection

• Thermal shutdown

L5973D Applications

• Networking: XDSL, modems, DC-DC modules

• Computer: printers, audio/graphic cards, optical storage, hard disk drive

• Consumer: STB, DVD, TV, VCR, car radio, LCD monitors

• Industrial: changers, car battery, DC-DC converters