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The AP61100/AP61102 is a 1A, synchronous buck converter with a wide input voltage range of 2.3V to 5.5V. The device fully integrates a 110mΩ high-side power MOSFET and an 80mΩ low-side power MOSFET to provide high-efficiency step-down DC-DC conversion. The AP61100/AP61102 device is easily used by minimizing the external component count due to its adoption of Constant On-Time (COT) control to achieve fast transient response, easy loop stabilization, and low output voltage ripple. The device is available in a SOT563 package.


  • 5V Input Distributed Power Bus Supplies
  • White Goods and Small Home Appliances
  • FPGA, DSP, and ASIC Supplies
  • Network Video Cameras
  • Wireless Routers
  • Consumer Electronics
  • General Purpose Point of Load


  • VIN: 2.3V to 5.5V
  • Output Voltage (VOUT): 0.6V to 3.6V
  • 1A Continuous Output Current
  • 0.6V ± 2% Reference Voltage
  • 15μA Low Quiescent Current (Pulse Frequency Modulation)
  • 2.2MHz Switching Frequency (VIN = 5V, VOUT = 1.8V)
  • Up to 89% Efficiency at 5mA Light Load
  • Programmable Operation Mode Through EN
    o Pulse Frequency Modulation
    o Pulse Width Modulation Regardless of Output Load
  • Power-Good Indicator
    o AP61102
  • Protection Circuitry
    o Undervoltage Lockout (UVLO)
    o VIN Overvoltage Protection (OVP)
    o Peak Current Limit
    o Valley Current Limit
    o Thermal Shutdown
  • 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-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Product Specifications

Product Parameters

Type Buck
Efficiency 95 %
HS RDS(ON) 110 mΩ
LS RDS(ON) 80 mΩ
Frequency Typ 2200 kHz
Minimum Input Voltage 2.3 V
Maximum Input Voltage 5.5 V
Output Current 1 A
Output Voltage ADJ V
Quiescent Current Typ 0.015 mA
Shutdown Current Typ 0.1 µA

Technical Documents

Recommended Soldering Techniques


Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AP61102Z6-7 Digi-Key Electronics 2875 9/25/2020 Buy Now United States
AP61102Z6-7 Mouser Electronics Inc. 2998 9/25/2020 Buy Now United States