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AS3729B Power Management Unit

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

Features

2 phases with separate control input
Separate power NMOS and PMOS for 4A per phase
Stand-alone zero-crossing operation
Integrated temperature monitoring
WL-CSP16: 1.615mm x 1.615mm, 0.4mm pitch

Benefits

Support for single or dual operation
2 x 4A output stages are running on 2.7MHz
Overtemperature protection
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]
Charger
Customizable Startup Sequences
Package	WL-CSP16 (1.615 x 1.615)

General description

The AS3729B 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-OSRAM AG is discontinuing production of this device.

This product suits for the following applications:

Mobile phones
Tablets
Notebooks

Tools

Title	Category	Headline	Buy
AS3715EvalKit	Application Board	Evaluation Kit for AS3715

Technical documents

	Type	Description	Language
	Datasheet	Document version 1-03	English

Notifications

Type	Description	Language
EoL Notification	WITHDRAWAL of EOL for AS3729B-BWLT and AS3729B-BWLM (issued 2020-Jan)	English
EoL Notification	AS252x, AS36xx, AS37xx_AS3956 (issued 2019-Sep)	English
EoL Notification	AS3729B-BWLx EoL Notification (issued Nov-22-2021)	English

Other information

	Type	Description	Language
	Block Diagram	AS3729B Block Diagram	English