High current switching regulator

The L4964 is a stepdown power switching regulator delivering 4A at a voltage variable from 5.1V to 28V.

Features of the device include overload protection, soft start, remote inhibit, thermal protection, a reset output for microprocessors and a PWM comparator input for synchronization in multichip configurations.

The L4964 is mounted in a 15-lead Multiwattâ plastic power package and requires very few external components.

Efficient operation at switching frequencies up to 120kHz allows a reduction in the size and cost of external filter components.

Key Features

  • CURRENT LIMITING
  • RESET OUTPUT
  • THERMAL SHUTDOWN
  • INPUT FOR REMOTE INHIBIT AND SYNCHRONUS PWM
  • VERY FEW EXTERNAL COMPONENTS
  • VERY HIGH EFFICIENCY (UP TO 90 %)
  • 4 A OUTPUT CURRENT
  • 0 TO 100 % DUTY CYCLE RANGE
  • 5.1 V TO 28 V OUTPUT VOLTAGE RANGE
  • SWITCHING FREQUENCY UP TO 120 KHz
  • SOFT START
  • PRECISE (± 3 %) ON-CHIP REFERENCE

Circuit Diagram

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Resources

Technical Documentation

Product Specifications
Description Version Size
DS0064 DS0064: High current switching regulator 1.2 1 MB

Publications and Collaterals

Brochures
Description Version Size
Brochure Power management guide 09.2017 3 MB
Support & Community


Sample & Buy

Part Number Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
L4964 MW 15L Tube Active 3.991 1000 NEC EAR99 MOROCCO MORE INFO DISTRIBUTOR AVAILABILITY
L4964HT MW 15L Tube Active 4.5 1000 NEC EAR99 - MORE INFO DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4964 ActiveMW 15LIndustrialEcopack1
L4964HT ActiveMW 15LIndustrialEcopack1
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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