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AS1382 Buck Converter

Small Solution 1A Step Down DC-DC Converter

The AS1382 is a high-efficiency, constant-frequency synchronous buck converter available in adjustable and fixed-voltage versions. The wide input voltage range (2.7V to 5.5V), automatic power save mode and minimal external component requirements make the AS1382 perfect for any single Li-Ion battery-powered application. Typical supply current with no load is 95μA and decreases to 0.04μA in shutdown mode.

An internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. The internally fixed switching frequency (2MHz, 3MHz or 4MHz) allows the usage of small surface mount external components.

Very low output voltages can be delivered with the internal 0.6V feedback reference voltage. The AS1382 is available in a 6-pin WL-CSP package.

Block diagram of the AS1382 Buck Converter

Key Features

  • Wide Input Voltage Range (2.7.V to 5.5.V)
  • High Efficiency up to 96%
  • Output Voltage Range: (0.6125V to 3.35V), Output Current of 1A
  • Switching Frequency
  • Integrated temperature monitoring

Key Benefits

  • Ideal for single Li-Ion battery powered applications
  • Extended battery life
  • Supports a variety of end applications
  • Over-temperature protection and shutdown
  • Cost effective, small package

AS1382 Applications

  • Mobile Communication Devices
  • Laptops and PDAs
  • Ultra Low Power Systems
  • Medical Instruments
  • Space Limited Applications with Low Power Consumption Requirements

AS1382 Product Facts

Input voltage [V] 2.7 to 5.5
Output voltage [V] 0.61 to 3.35
Output current [mA] 1A
Efficiency [%] Up to 96%
Iq [μA] 95uA
Architecture Synchronous Step Down
fmax [kHz] 4MHz
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Reset [POK] -
Package WL-CSP6, 0.4mm pitch