ams AG - global leader in the design and manufacture of high performance analog ICs (integrated circuits)

AS3728 Power Management Unit

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


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.

Key Features

  • 2 phases with separate control input
  • Separate low side & 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

Key Benefits

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

Product Facts

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
Audio ADC
Audio features
General purpose ADC
Customizable startup sequences
Package WL-CSP24 (2.415x 1.615)

Additional Information


The device is a high current dual-phase DC-DC power stage and ideal for mobile phones, tablets and notebooks.

Supported Processors - Reference Design

Reference designs from processor vendors and partners of ams are available for many processor types.