Diodes Incorporated
U DFN3030 10

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AP3427M (Not Recommended for new design)

NRND = Not Recommended for New Design

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The AP3427M is a high efficiency step-down dual channel DC-DC voltage converter.

The AP3427M has integrated Soft Start (SS), Under Voltage Lock Out (UVLO), Thermal Shutdown Detection (TSD) and Short Circuit Protection are designed to provide reliable product applications.


  • High Efficiency Buck Power Converter
  • Output Current: 1.0A/1.0A
  • Low RDS(ON) Internal Switches: 200mΩ (VIN=5V)
  • Adjustable Output Voltages from 0.6V to 0.9×VIN
  • Wide Operating Voltage Range: 2.5V to 5.5V
  • Built-In Power Switches for Synchronous Rectification with High Efficiency
  • Feedback Voltage: 600mV
  • 1.5MHz Constant Frequency Operation
  • Thermal Shutdown Protection
  • Low Drop-Out Operation at 100% Duty Cycle
  • Input Over Voltage Protection
  • No Schottky Diode Required


  • Post DC-DC Voltage Regulation
  • PDA and Notebook Computer

Product Specifications

Product Parameters

Efficiency (%) 93
Frequency Typ (Hz) 1500
HS RDS(ON) (mΩ) 200
LS RDS(ON) (mΩ) 200
MaximumInput Voltage (V) 5.5
MinimumInput Voltage (V) 2.5
Output Current (mA) 1
Output Voltage (V) 0.6 to 0.9xVIN
Quiescent Current Typ (mA) 0.22
Shutdown Current Typ (µA) 0.1
Type Buck

Related Content


Technical Documents

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-2505 2021-01-26 2021-07-26 Device End of Life (EOL)