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Manufacturer Part #

AS1331 EB

Evaluation Board for the AS1331 Buck-Boost Convert IC

Mfr. Name: ams
Standard Pkg:
Product Variant Information section
Date Code: 1214
Product Specification Section
Technical Attributes
Attributes Table
Application Type: DC/DC Converters
Core Supported: AS1331
Features & Applications

The AS1331 EB Evaluation Kit for AS1331 Buck-Boost Converter with RoHS/ Pb-free compliant. The AS1331 is designed to work with the AS1331 adjustable or fixed output voltage version.

The difference between these two versions is the configuration of the resistor divider R1/R2. Before using the Demoboard please make sure which chip is on the board and check whether R1/R2 configuration matches the AS1331 version. The marking of the chip can be found printed on the IC soldered on the board.

The AS1331 includes two N-channel MOSFET switches and two P-channel switches. Also following features are implemented: a quiescent current of typically 22 μA (ideal for battery power applications), a shutdown current less than 1 μA, current limiting, thermal shutdown and output disconnect. The AS1331 is available in a 10-pin 3x3 mm TDFN package with fixed and adjustable output voltage.


  • Input Voltage Range: 1.8 V to 5.5 V
  • Output Voltages:
  • Fixed: 2.5 V, 3.0 V, 3.3 V
  • Adjustable: 2.5 V to 3.3 V
  • Output Current: 300 mA @ 3.3 V
  • Up to 90% efficiency
  • Power Good
  • Output Disconnection in Shutdown
  • Automatic transition between Buck and Boost mode
  • Ultra Low Quiescent Current: 22 μA, Shutdown Current <1 μA (Active Low)
  • Short-Circuit Protection
  • Low Battery detection
  • Over Temperature Protection
  • 10-pin 3x3 mm TDFN package


  • Handheld computers
  • Handheld instruments
  • Portable music players and PDA’s
  • Two and three cell Alkaline, NiCd or NiMH or single cell Li battery powered products
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