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2A CMOS LDO Regulator

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The AP2132 series are positive voltage regulator ICs fabricated by CMOS process. The ICs consist of a voltage reference, an error amplifier, a power transistor, a resistor network for setting output voltage, a current limit circuit for current protection, and a chip enable circuit. The AP2132 have features of large current, low dropout voltage, high output voltage accuracy, and low input voltage. The AP2132 provide a power good (PG) signal to indicate if the voltage level of VOUT reaches 92% of its rating value. And it operates with a VIN as low as 1.4V and VPP voltage 5V with output voltage programmable as low as 0.6V. The AP2132 are available in 1.2V, 1.5V, 1.8V, 2.5V fixed output voltage versions and adjustable output voltage version. The fixed versions integrate the adjust resistors. It is also available in an adjustable version, which can set the output voltage with external resistor. If the pin of adjustable output voltage is to ground, it will switch to fixed output voltage.


  • Adjustable Output: 0.6V to 3.0V
  • Low Dropout Voltage: 300mV@IOUT=2A, VOUT=1.2V
  • Over Current and Over Temperature Protection
  • Enable Pin
  • PSOP-8 Package with Thermal Pad
  • Maximum Output Current: 2A
  • High Output Voltage Accuracy: 2%
  • VOUT Power Good Signal
  • Excellent Line/Load Regulation
  • Application(s)

  • Notebook
  • Product Specifications

    Product Parameters

    Compliance (Only Automotive supports PPAP) Standard
    Output options Adjustable & Fixed
    Iout (A) 2
    Vin (Max) (V) 5.5
    Vin (Min) (V) 1.4
    Vout (min) 0.6
    Vout (max) 5.5
    Fixed Vout (V) 1.2, 1.5, 1.8, 2.5
    Adjustabe VFB (V) 0.6
    Iq (typ) (µA) 300
    Accuracy 25C 2%
    VDROPOUT (Max) (V) at Max Current and Max Ouput Voltage 0.45
    PSRR (dB) 1kHz 60
    Operating Temperature (Ambient) (°C) -40 to 85 (°C)
    Enable Active H
    Channels 1
    Output Discharge no
    Power Good open drain
    Iq (max)(µA) 300
    VCTL function yes

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    Product Change Notices (PCNs)

    A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

    PCN # Issue Date Implementation Date Subject
    PCN-2568 2022-03-29 2022-03-29 Qualified Additional Assembly & Test (A/T) Sites, Bill of Material, and updated Data Sheets for Package Outline Dimension Change