AS3728 Power Management Unit
8A HV dual-phase power stage (2 x 4A)
Features
- 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
Benefits
- 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] | |
| Charger | |
| 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
Tools
| 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 |
Notifications
| 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 |
Related Boards
Evaluation Kit for AS3722/28
AS3722/28EvalKit
The AS3722/28 Evaluation Kit allows you to easily evaluate the principle functionality of the AS3722 power management unit. All functions and registers can be controlled via the included PC GUI software.
Key Features:
- 4 DC-DC step-down regulators (3-4 MHz)
- 3 DC-DC step-down controller
- 11 universal LDOs
- RTC
- Supervisor with interrupt generation and selectable warning levels
- General purpose IOs
- ADC with intern and external sources
- OTP programmable boot and power-down sequence
- Stand-by function with programmable sequence and voltages
- Control interface
- Package: 124-pin CTBGA (8x8mm), 0.5mm pitch
Applications:
The device is suitable for tablet PCs, netbooks, portable media players, portable navigation devices, and mobile internet devices.