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AS3721 Power Management Unit

4 buck DC-DC, 24A DC-DC controller, 12 LDOs, general purpose ADC


  • 4 DC-DC step-down regulators (3-4MHz)
  • 3 DC-DC step-down controller
  • 11 universal LDOs
  • Low power real time clock (<1uA)
  • Programmable stand-by sequence


  • Compact design due to small coils for IO and memory voltage generation
  • High current generation with external power stages to minimize PMIC power dissipation
  • Multiple independent voltage rails for general purpose IO supplies

Product parameters

DC-DC Step Up Converters
DC-DC Step Down Converters 8-phase + 2-phase + 2-phase + 4A +2A + 2x1.5A
Special LDOs [mA]
Universal LDOs [mA] 12x300
Current Sinks [mA]
Charge Pump [V/mA]
Audio DAC [dB SNR]
Audio ADC [dB SNR]
Audio Features
General Purpose ADC [bit] 10, 12-channel
Customizable Startup Sequences Programmable
Package BGA-124 (8x8mm)

General description

The programmable power management unit AS3721 features 4x DC-DC buck converters, 3x buck converter (6A to 24A) and 12 low noise LDOs. The high level of integration and the 4MHz switching frequencies ensure small system footprint.

This product suits for the following applications:

  • Tablet PCs
  • Netbooks
  • Portable media players
  • Solid state disk drives
  • Embedded systems


Title Category Headline Buy
AS3721/29EvalKit Application Board Evaluation Kit for AS3721/29

Environmental documents

Type Description Language
Material Declaration Form MDF_190120013_AS3721-BCTT-00 English
Material Declaration Form MDF_190120013_AS3721-BCTT-00 English

Other information

Type Description Language
Block Diagram AS3721 Block Diagram English
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