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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.

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
EoL Notification AS3701, AS3722, AS3728 EoL Notification (issued Nov-25-2021) English

Other information

Type Description Language
Block Diagram AS3728 Block Diagram English
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