Diodes Incorporated

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150MA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator

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The AP7311 is a 150mA, adjustable and fixed output voltage, low dropout linear regulator. The device included pass element, error amplifier, band-gap, current limit and thermal shutdown circuitry. The device is turned on when EN pin is set to logic high level. The characteristics of low dropout voltage and low quiescent current make it suitable for low power applications, for example, battery powered devices. The typical quiescent current is approximately 65μA. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions. The AP7311 is available in SOT25 package.


  • 150mA Low Dropout Regulator with EN
  • Very low IQ over full load: 65μA
  • Wide input voltage range: 2V to 6V
  • Wide adjustable output: 0.8V to 5.0V
  • Fixed output options: 1.0V to 3.3V
  • PSRR: 65dB at 100Hz
  • Fast start-up time: 80μs
  • Stable with low ESR, 1μF ceramic output capacitor
  • Excellent Load/Line Transient Response
  • Low dropout: 150mV typical at 150mA
  • Current limit protection
  • Short circuit protection
  • Thermal shutdown protection
  • Ambient temperature range: -40°C to 85°C
  • SOT25: Available in “Green” Molding Compound (No Br, Sb)
  • Lead Free Finish/RoHS Compliant


  • Notebook and Desktop Computers and Pheripherals
  • Portable Devices
  • Battery Powered Devices
  • CD-ROM, DVD and LAN Cards

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
Output options Adjustable & Fixed
Iout (A) 0.15
Vin (Max) (V) 6
Vin (Min) (V) 2
Vout (min) 0.4
Vout (max) 6
Fixed Vout (V) 1.0, 1.2, 1.5, 1.8, 2.0, 2.5, 2.8, 3.0, 3.3
Adjustabe VFB (V) 0.4
Iq (typ) (µA) 55
Accuracy 25C 2%
VDROPOUT (Max) (V) at Max Current and Max Ouput Voltage 0.3
PSRR (dB) 1kHz 65
Operating Temperature (Ambient) (°C) -40 to 85 (°C)
Enable Active H
Channels 1
Output Discharge no
Iq (max)(µA) 75
VCTL function no

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