Diodes Incorporated
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Quad 300MA High PSRR Low Noise LDO with ENABLE

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The AP7348 is a 4 channel low dropout regulator with high output voltage accuracy, low RDS(ON), high PSRR, low output noise and low quiescent current. This regulator is based on a CMOS process.

The AP7348 includes two voltage references, and four channels with each having an error amplifier, foldback current limiting, a discharge circuit and an independent resistor network to determine the fixed output voltage. The over temperature sensing is for each channel with all 4 channel being disabled during a temperature fault condition. The device has two enable inputs with EN1 controlling both VOUT1 and VOUT3 leaving VOUT2 and VOUT4 to be controlled by EN2. During disable the two associated channels will discharge.

With its low power consumption and line and load transient response, the AP7348 is well suited for low power handheld communication equipment.
The AP7348 is provided in the X1-DFN1612-8 (Type B) package allowing for a small footprint and a dense PCB layout.


  • Low VIN and Wide VIN Range: 1.7V to 5.25V
  • Each Channel Output Current: 300mA
  • VOUT Accuracy ±1%
  • Ripple Rejection 75dB at 1kHz
  • Low Output Noise, 60μVrms from 10Hz to 100kHz
  • Total 4 Channel Quiescent Current is Typically 160μA
  • VOUT Fixed 1.2V to 3.6V
  • 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, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/


  • Smart Phone/Tablet
  • WIFI Access Points
  • Communication Module
  • Camera Module, Appliances
  • RF Supply for IOT/LPWAN

Product Specifications

Product Parameters

Iq (max) (µA) 140
Iq (typ) (?A) 35
AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Type LDO
Output options Fixed
Iout (A) 0.13
Vin (Max) (V) 5.25
Vin (Min) (V) 1.7
Vout (min) 1.2
Vout (max) 15
Fixed Vout (V) 1.2, 1.5, 1.8, 2.5, 2.8, 3.0, 3.6
Accuracy 25C 1
Noise uV RMS 10-100 kHz 60
VDROPOUT (Max) (V) at Max Current and Max Ouput Voltage 0.33
PSRR (dB) 1kHz 75
Operating Temperature (Ambient) (°C) -40 to 85
Enable Active Yes (High)
Channels 4
Output Discharge Yes
Power Good No
Reverse Protection No
VCTL Function No

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