Diodes Incorporated
W QFN3535 20

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3A, Ultra Low Noise, High Accuracy, LDO Voltage Regulator

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The AP7179D is a high output current (3A), low-dropout regulator capable of sourcing 3A with 180mV maximum dropout, lownoise (4.4μVRMS), high output voltage accuracy (1%). The device output voltage is pin-programmable from 0.8V to 3.95V using a PCB layout and adjustable from 0.8V to 5.0V using an external resistor divider. The device supports a lower input voltage of 1.1V, which makes it flexible to use and requires a lower component count.

The device’s low noise (4.4μVRMS), high PSRR, and high output current capability makes it ideal to power noise-sensitive devices such as high-performance serializers and deserializers (SerDes), analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and FR components.

High output accuracy, remote sensing, excellent transient performance, and soft-start capabilities also make the AP7179D ideal
to power digital loads such as field-programmable gate arrays (FPGAs), digital signal processors (DSPs), and application-specific
integrated circuits (ASICs). The enable control and a power-good indicator provide easy and accessible power-sequence control. Output noise immunity is enhanced by adding a bypass capacitor on NR/SS pin.

The AP7179D is packaged in the W-QFN3535-20 (Type A1) package.


  • Low VIN and Wide VIN Range: 1.1V to 6.5V
  • Low Dropout Voltage: 180mV at 3A
  • VOUT Accuracy ±1% Over Line, Load, and Temperature
  • Programmable Output Voltage
    • Output Voltage Range: 0.8V to 3.95V
  • Adjustable Output Voltage
    • Output Voltage Range: 0.8V to 5.5V
  • Ultra-High PSRR: 40dB at 500kHz
  • Output Voltage Noise:
    • 4μVRMS at 0.8V Output
    • 7μVRMS at 5.0V Output
  • Adjustable Soft-Start Output
  • Open-Drain Power-Good Indicator Function
  • Stable with a 47μF or Larger Ceramic Output Capacitor
  • Excellent Load Transient Response
  • Enable Control
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/


  • Portable electronic devices
  • Digital loads: SerDes, FPGAs, and DSPs
  • Analog circuits applications: VCO, ADC, DAC, and LVDS
  • Test and measurement equipment

Product Specifications

Product Parameters

Iq (max) (µA) 4000
Iq (typ) (?A) 2800
AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Type LDO
Output options Adjustable
Iout (A) 3
Vin (Max) (V) 6.5
Vin (Min) (V) 1.1
Vout (min) 0.8
Vout (max) 3.6
Adjustable VFB (V) 0.8
Accuracy 25C 1
Noise uV RMS 10-100 kHz 4.4
VDROPOUT (Max) (V) at Max Current and Max Ouput Voltage 0.11
PSRR (dB) 1kHz 42
Operating Temperature (Ambient) (°C) -40 to 85
Enable Active Yes (High)
Channels 1
Output Discharge Yes
Power Good Open Drain
Reverse Protection No
VCTL Function No

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