Diodes Incorporated
SO 8

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2A CMOS LDO Regulator

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The AP2132B 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 AP2132B series have features of large current, low dropout voltage, high output voltage accuracy, low input voltage. The AP2132B provides a power good (PG) signal to indicate if the voltage level of VOUT reaches 92% of its rating value. And it operates with VIN as low as 1.4V and VCTRL voltage 5V with output voltage programmable as low as 0.8V. The AP2132B 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: 0.8V 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


  • Notebook

Product Specifications

Product Parameters

Iq (max) (µA) 300
Iq (typ) (?A) 300
AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Type LDO
Output options Adjustable & Fixed
Iout (A) 2
Vin (Max) (V) 5.5
Vin (Min) (V) 1.4
Vout (min) 0.6
Vout (max) 3.3
Fixed Vout (V) 1.2, 1.5, 1.8, 2.5
Adjustable VFB (V) 0.6
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
Enable Active Yes (High)
Channels 1
Output Discharge No
Power Good Open Drain
Reverse Protection No
VCTL Function Yes

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