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AS1312 Boost Converter

Ultra low 1µA quiescent current


  • Wide input voltage range (0.7V to 5.0V)
  • Low shutdown current of less than 100nA
  • Low quiescent current of 1µA
  • Peak output current of 200mA
  • 94% efficiency
  • 8-pin WL-CSP with 0.4mm pitch


  • Ideal for single Li-ion battery powered applications
  • Extended battery life
  • Less power consumption
  • Supports a variety of end applications
  • Overtemperature protection and shutdown
  • Early power fail warning

Product parameters

Input Voltage [V] 0.7 to 5.0
Output Voltage [V] 2.5 to 5.0
Output Current [mA] 100
Efficiency [%] 94
Iq [µA] 1
Architecture Hysteretic
fmax [kHz]
Enable/SHDN [/SHDN] Yes
Reset [POK] Yes
Features Low battery detection, fixed output voltage
Package 8-pin (2x2) TDFN, 8-pin WL-CSP with 0.4mm pitch

General Description

The AS1312 is an ultra low IQ hysteretic DC-DC step-up converter. The AS1312 achieves an efficiency of up to 94% and is designed to operate from a +0.7V to +5.0V supply, the output voltage is fixed in 50mV steps from +2.5V to 5.0V. In order to save power the AS1312 features a shutdown mode, where it draws less than 100nA. In shutdown mode the battery is not connected to the output. If the input voltage exceeds the output voltage the device is in a feedthrough mode and the input is directly connected to the output voltage. In light load operation, the device enters a sleep mode when most of the internal operating blocks are turned off in order to save power. This mode is active approximately 50μs after a current pulse provided that the output is in regulation. The AS1312 also offers an adjustable low battery detection. If the battery voltage decreases below a threshold defined by two external resistors on pin LBI, the LBO output is pulled to logic low. LBO is working as Power-OK when LBI is connected to GND. The AS1312 is available in a 8-pin (2x2) TDFN and a 0.4mm pitch 8-pin WL-CSP package.

This product suits for the following applications:

  • Handheld devices
  • Battery-powered products


Title Category Headline Buy
AS1312EvalKit Application Board Evaluation Kit for AS1312

Technical Documents

Name Type Description Version Language
AS1312_BD000333_1-00.png Block Diagram AS1312 Block Diagram 1-00 English
AS1312_DS000311_2-00.pdf Datasheet Document version 1-19 2-00 English
AS11xx_AS13xx_AS17xx_AS349x_AS36xx_EN000160_1-00.pdf EoL Notification AS11xx_AS13xx_AS17xx_AS349x_AS36xx (issued 2018-Oct) 1-00 English
AS1111_AS13xx_selected variants_EN000125_1-00.pdf EoL Notification AS1111_AS1312_AS1313_AS1345_AS1376 selected variants (issued 2016-Dec) 1-00 English
AS1312_PD000283_1-00.png Other Product Document AS1312EvalKit Image 1-00 English
AS1312_UG000249_2-00.pdf User Guide Standard board EK 2-00 English

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