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3.8V-32V INPUT, 3A Low Iq Synchronous Buck with Enhanced EMI Reduction

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The AP63300/AP63301 is a 3A, synchronous buck converter with a wide input voltage range of 3.8V to 32V. The device fully integrates a 75mΩ high-side power MOSFET and a 40mΩ low-side power MOSFET to provide high-efficiency step-down DC-DC conversion.

The AP63300/AP63301 device is easily used by minimizing the external component count due to its adoption of peak current mode control along with its integrated loop compensation network.

The AP63300/AP63301 design is optimized for Electromagnetic Interference (EMI) reduction. The device has a proprietary gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off times, which reduces high-frequency radiated EMI noise caused by MOSFET switching. AP63300 also features
Frequency Spread Spectrum (FSS) with a switching frequency jitter of ±6%, which reduces EMI by not allowing emitted energy to stay in any one frequency for a significant period of time.

The device is available in a TSOT26 package.


  • VIN 3.8V to 32V
  • 3A Continuous Output Current
  • 0.8V ± 1% Reference Voltage
  • 22μA Low Quiescent Current (Pulse Frequency Modulation)
  • 500kHz Switching Frequency
  • Supports Pulse Frequency Modulation (PFM)

- AP63300

- Up to 88% Efficiency at 5mA Light Load

  • Pulse Width Modulation (PWM) Regardless of Output Load

- AP63301

  • Proprietary Gate Driver Design for Best EMI Reduction
  • Frequency Spread Spectrum (FSS) to Reduce EMI

- AP63300

  • Low-Dropout (LDO) Mode
  • Precision Enable Threshold to Adjust UVLO
  • Protection Circuitry

- Undervoltage Lockout (UVLO)
- Output Overvoltage Protection (OVP)
- Cycle-by-Cycle Peak Current Limit
- Thermal Shutdown

  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)


  • 5V, 12V, and 24V Distributed Power Bus Supplies
  • Flat Screen TV Sets and Monitors
  • Power Tools and Laser Printers
  • White Goods and Small Home Appliances
  • FPGA, DSP, and ASIC Supplies
  • Home Audio
  • Network Systems
  • Gaming Consoles
  • Consumer Electronics
  • General Purpose Point of Load

Product Specifications

Product Parameters

Type Buck
Efficiency (%) 96 %
HS RDS(ON) (mΩ) 83 mΩ
LS RDS(ON) (mΩ) 43 mΩ
Frequency Typ (Hz) 500 kHz
MinimumInput Voltage (V) 3.8 V
MaximumInput Voltage (V) 32 V
Output Current (A) 3 A
Output Voltage (V) ADJ V
Quiescent Current Typ (mA) 0.258 mA
Shutdown Current Typ (µA) 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
AP63301WU-7 Active TSOT26 TPGP 3000 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Farnell, An Avnet Company 3000 9/25/2022 England Buy Now
Mouser Electronics Inc. 19727 9/25/2022 South America, North America, Asia, Europe, Middle East Buy Now
Digi-Key Electronics 487 9/24/2022 Europe, Asia, North America 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-2540 2021-08-08 2021-11-08 Qualified Additional Fab Site, Assembly/Test (A/T) Sites, Bill of Material (BOM) and updated Device Data Sheets