AS7620 Buck Converter

HV DC-DC step-down converter, 32V, with dual power monitor


  • Input 3.6V to 32V
  • 500mA (typical) @1.2V to Vin
  • Up to 90% efficiency


  • 24V industrial supply rail
  • Flexible use
  • Good thermal performance

Product parameters

Input Voltage [V] 3.6 to 32
Output Voltage [V] AS7620-A: 1.2 to Vin \ AS7620-B: 3.3
Output Current [mA] 500 (typical)
Efficiency [%] 90 (max.)
Iq [µA] 30 (typical)
Architecture Hysteretic, async.
fmax [kHz] >250
Enable/SHDN [/SHDN] Yes
Reset [POK] Yes
Features Early power fail warning \ 100% duty cycle
Package QFN-12 (4x4 mm)

General Description

The AS7620 is a high-efficiency, high-voltage, hysteretic DC-DC step-down converter capable to drive 500mA (typical, 650mA peak) at 1.2V to Vin output with up to 90% efficiency. The devise operates on wide input voltage range, from 3.6V up to 32V. Low IQ current of 30μA and on-demand switching extends the battery life on low load applications.

Not Recommended for New Designs
ams AG is discontinuing production of this device.

This product suits for the following applications:

  • Industrial 24VDC applications like PLCs and robotics
  • Home security and building control applications
  • Solid state utility meters
  • Signage and LED column power
  • Sensor interfaces


Title Category Headline Buy
AS7620EvalKit Application Board Evaluation Kit for AS7620

Technical Documents

Type Description Language
Datasheet Document version 1.18 English


Type Description Language
EoL Notification AS2540, AS13xx, AS3668, AS3709, AS371x, AS7620 (issued 2019-Jun) English

Other Information

Type Description Language
Block Diagram AS7620 Block Diagram English
Block Diagram As7620 Application Diagram English