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L4973 - 3.5A step down switching regulator

General Description

The L4973 is a step down monolithic power switching regulator delivering 3.5 A at fixed voltages of 3.3 V or 5.1 V and using a simple external divider output adjustable voltage up to 50 V.

Key Features

  • Up to 3.5 A step down converter.
  • Operating input voltage from 8 V to 55 V.
  • 3.3 V and 5.1 V (±1 %) fixed output, and adjustable outputs from:.
  • 0.5 V to 50 V (3.3 type).
  • 5.1 V to 50 V (5.1 type).
  • Frequency adjustable up to 300 kHz.
  • Voltage feed forward.
  • Zero load current operation (min. 1 mA).
  • Internal current limiting (pulse by pulse and HICCUP mode).
  • Precise 5.1 V (1.5%) reference voltage externally availa.

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Other Datasheets by STMicroelectronics

Part Number Description
L4973D3.3 3.5A STEP DOWN SWITCHING REGULATOR
L4973D5.1 3.5A STEP DOWN SWITCHING REGULATOR
L4973V3.3 3.5A STEP DOWN SWITCHING REGULATOR
L4973V5.1 3.5A STEP DOWN SWITCHING REGULATOR
L497 HALL EFFECT PICKUP IGNITION CONTROLLER

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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L4973 3.5 A step down switching regulator Datasheet - production data • Thermal shutdown • Output over voltage protection • Soft-start function SO-20 (12+4+4) Features • Up to 3.5 A step down converter • Operating input voltage from 8 V to 55 V • 3.3 V and 5.1 V (±1 %) fixed output, and adjustable outputs from: – 0.5 V to 50 V (3.3 type) – 5.1 V to 50 V (5.1 type) • Frequency adjustable up to 300 kHz • Voltage feed forward • Zero load current operation (min. 1 mA) • Internal current limiting (pulse by pulse and HICCUP mode) • Precise 5.1 V (1.5%) reference voltage externally available • Input/output synchronization function • Inhibit for zero current consumption (100 mA typ.