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The AP61300/AP61302 is a 3A, synchronous buck converter with a wide input voltage range of 2.4V to 5.5V. The device fully integrates a 70mΩ high-side power MOSFET and a 50mΩ low-side power MOSFET to provide high-efficiency step-down DC-DC conversion.
The AP61300/AP61302 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: 2.4V to 5.5V
  • Output Voltage (VOUT): 0.6V to VIN
  • 3A Continuous Output Current
  • 6V ± 2% Reference Voltage
  • 19μA Low Quiescent Current (Pulse Frequency Modulation)
  • 2MHz Switching Frequency (VIN = 5V, VOUT = 1.8V)
  • Up to 84% Efficiency at 5mA Light Load
  • Programmable Operation Mode Through EN
  • Pulse Frequency Modulation
  • Pulse Width Modulation Regardless of Output Load
  • Low-Dropout (LDO) Mode
  • Power-Good Indicator
  • AP61302
  • 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-Q100/101/200, 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 Load

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
Type Buck
Minimum Input Voltage (V) 2.4
Maximum Input Voltage (V) 5.5
Output Current (A) 3
Minimum Output Voltage (V) 0.6
Maximum Output Voltage (V) VIN
Quiescent Current Typ (µA) 19
Shutdown Current Typ (µA) 0.1
Frequency Typ (kHz) 2200
HS RDS(ON) (mΩ) 70
LS RDS(ON) (mΩ) 50
Features Enable, Light Load Efficiency, Forced PWM, Power-Good Output Discharge, Soft-start Fixed, UVLO Fixed, VIN OVP, Overcurrent Protection, Thermal Shutdown, Synchronous Rectification

Related Content



Technical Documents


Recommended Soldering Techniques



Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
Contact Sales
Request Samples
Qty. Carrier
AP61302Z6-7 Active SOT563 TPGP 3000 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Mouser Electronics Inc. 18809 10/4/2022 South America, North America, Asia, Europe, Middle East Buy Now
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)


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