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 - 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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