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AS3728 Power Management Unit

8A HV dual-phase power stage (2 x 4A)


  • 2 phases with separate control input
  • Separate low side and high side power NMOS for 4A per phase
  • Stand-alone zero-crossing operation
  • Integrated temperature monitoring
  • 12V operating range
  • WL-CSP24: 2.415mm x 1.615mm, 0.4mm pitch


  • Support for single or dual-phase operation
  • 2 x 4A output stages are running on 3MHz
  • Overtemperature protection
  • Direct conversion from standard 12V rails
  • Cost effective, small package

Product parameters

DC-DC Step Up Converters
DC-DC Step Down Converters 2-phase power stage with 2x4A
Special LDOs [mA]
Universal LDOs [mA]
Current Sinks [mA]
Charge Pump [V/mA]
Audio DAC [dB SNR]
Audio ADC [dB SNR]
Audio Features
General Purpose ADC [bit]
Customizable Startup Sequences
Package WL-CSP24 (2.415x 1.615)

General Description

The AS3728 is a companion chip for the AS3715/21/22 PMICs containing control circuitry and power FETs for 2 phases. Up to 4 ICs can be used in parallel to achieve 32A drive capability.

Not Recommended for New Designs
ams AG is discontinuing production of this device. Final lifetime buy order must be placed by June 30, 2021. Please contact your local sales representative for further information.

This product suits for the following applications:

  • Mobile phones
  • Tablets
  • Notebooks


Title Category Headline Buy
AS3722/28EvalKit Application Board Evaluation Kit for AS3722/28

Technical Documents

Type Description Language
Datasheet Document version 1-03 English

Environmental Documents

Type Description Language
RoHS Certificate RoHS Certificate_AS3728 English


Type Description Language
EoL Notification AS1xxx, AS25xx, AS3xxx, AS73211, AS89020, SL900A, TMD4704 (issued 2020-Dec) English

Other Information

Type Description Language
Block Diagram AS3728 Block Diagram English
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