Diodes Incorporated

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Wide Input Voltage Range, 300MA ULDO Regulator

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The AP7370 is a positive voltage regulator IC.

The AP7370 has features of wide input voltage range, high accuracy, low dropout voltage, current limit, reverse current protection, and ultra-low quiescent current which make it ideal for use in various USB and portable devices and instrument application.

The IC consists of a voltage reference, an error amplifier, a resistor network for setting output voltage, a current limit circuit for current protection, and a chip enable circuit.

The AP7370 is available in 1.2V, 1.5V,1.8V,2.8V, 3.0V, 3.3V, 3.6V and 5.0V fixed output voltage versions.

The AP7370 is available in space-saving SOT23, SOT25, SOT89 and DFN2020-6 packages.


  • Wide Input Voltage Range: Up to 18V
  • Low Dropout Voltage: VDROP = 500mV @ IOUT = 100mA
  • Low Ground Current
  • High Output Voltage Accuracy
  • Compatible with Low ESR Ceramic Capacitor
  • Excellent Line/Load Regulation


  • TV
  • Monitor
  • Set-top-box
  • Computing
  • Surveillance

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
Output options Fixed
Iout (A) 0.3
Vin (Max) (V) 18
Vin (Min) (V) 3.2
Vout (min) 1.2
Vout (max) 5
Fixed Vout (V) 1.2, 1.5, 1.8, 2.8, 3.0, 3.3, 3.6, 5.0
Iq (typ) (µA) 1.5
Accuracy 25C 1%
VDROPOUT (Max) (V) at Max Current and Max Ouput Voltage 0.55
PSRR (dB) 1kHz 40
Operating Temperature (Ambient) (°C) -40 to 85 (°C)
Channels 1
Output Discharge no
Reverse Protection reverse current
Iq (max)(µA) 2.5
VCTL function no

Technical Documents

Evaluation Boards and User Guides

Recommended Soldering Techniques



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-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site