Diodes Incorporated

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The DIODES™ AP61200 / DIODES™ AP61201 / DIODES™ AP61202 / DIODES™ AP61203 is a 2A, 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 AP61200/AP61201/AP61202/AP61203 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
  • 2A Continuous Output Current
  • 6V ± 2% Reference Voltage
  • 19μA Low Quiescent Current (Pulse Frequency Modulation)
  • 3MHz Switching Frequency (VIN = 5V, VOUT = 1.8V)
  • Up to 89% Efficiency at 5mA Light Load
  • Operation Mode Options
    • Pulse Frequency Modulation: AP61200 and AP61202
    • Force Pulse Width Modulation: AP61201 and AP61203
  • Power-Good Indicator
    • AP61202 and AP61203
  • Protection Circuitry
    • Undervoltage Lockout (UVLO)
    • VIN Overvoltage Protection (OVP)
    • Peak Current Limit
    • Valley Current Limit
    • 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-Q100/101/104/200, 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 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 loads

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
Type Buck
Minimum Input Voltage (V) 2.3
Maximum Input Voltage (V) 5.5
Output Current (A) 2
Minimum Output Voltage (V) 0.6
Maximum Output Voltage (V) 3.6
Quiescent Current Typ (µA) 19
Shutdown Current Typ (µA) 0.1
Frequency Typ (kHz) 1300
HS RDS(ON) (mΩ) 110
LS RDS(ON) (mΩ) 80
Features Enable,Light Load Efficiency,PFM,Output Discharge,Soft-start Fixed,UVLO Fixed,VIN OVP,Overcurrent Protection,Thermal Shutdown,Synchronous Rectification

Related Content


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-2674 2024-03-28 2024-06-26 Additional Wafer Source SPFAB
PCN-2605 2023-03-09 2023-06-09 Qualified Additional Cu Pillar Bump Site and Bill of Materials (BOM) Lead Frame Material