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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.


  • 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/


  • 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

Product Specifications

Product Parameters

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

Related Content


Technical Documents


Evaluation Boards and User Guides

Recommended Soldering Techniques


Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
Contact Sales
Request Samples
Qty. Carrier
AP61102Z6-7 Active SOT563 TPGP 3000 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Future Electronics - Europe 15000 10/3/2022 England Contact Sales
Request Sample

Environmental Compliance Legend:
LFF: Pb-Free Finish and RoHS 5/6
TLFP: Totally Pb-Free Product and RoHS 6/6
LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free
TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free
GREEN: Halogen-free and RoHS compliant
RoHS: RoHS compliant but NOT halogen-free

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-2531 2021-07-30 2022-01-29 Additional Die Revision, Redistribution Layer (RDL), BUMP Sites (SJSEMI and LBS), as well as Assembly/Test (A/T) Site (CAT)