Diodes Menu Close

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details.

Back to Buck Converter


3.8V-32V INPUT, 2A Low Iq Synchronous Buck with Enhanced EMI Reduction

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The AP63200/AP63201/AP63203/AP63205 are 2A, synchronous buck converters with a wide input voltage range of 3.8V to 32V and fully integrates a 125mΩ high-side power MOSFET and a 68mΩ low-side power MOSFET to provide high-efficiency step-down DC/DC conversion.

The AP63200/AP63201/AP63203/AP63205 devices are easily used by minimizing the external component count due to their adoption of peak current mode control along with its integrated compensation network.

The AP63200/AP63201/AP63203/AP63205 have optimized designs for Electromagnetic Interference (EMI) reduction. The converter 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. They also have a proprietary gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off times, which further erases high-frequency radiated EMI noise caused by MOSFET switching.

The devices are available in a low-profile, TSOT26 package.


  • VIN 3.8V to 32V
  • 2A Continuous Output Current
  • 0.8V ± 1% Reference Voltage
  • 22µA Ultralow Quiescent Current
  • Switching Frequency
    o 500kHz: AP63200 and AP63201
    o 1.1MHz: AP63203 and AP63205
  • Pulse Width Modulation (PWM) Regardless of Output Load
    o AP63201
  • Supports Pulse Frequency Modulation (PFM)
    o AP63200, AP63203, and AP63205
    o Up to 80% Efficiency at 1mA Light Load
    o Up to 88% Efficiency at 5mA Light Load
  • Fixed Output Voltage
    o 3.3V: AP63203
    o 5.0V: AP63205
  • Proprietary Gate Driver Design for Best EMI Reduction
  • Frequency Spread Spectrum (FSS) to Reduce EMI
  • Precision Enable Threshold to Adjust UVLO
  • Protection Circuitry
    o Overvoltage Protection
    o Cycle-by-Cycle Peak Current Limit
    o Thermal Shutdown
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)


  • 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
  • Set Top Boxes
  • Gaming Consoles
  • Consumer Electronics

Product Specifications

Product Parameters

Type Buck
Efficiency (%) 93 %
HS RDS(ON) (mΩ) 125 mΩ
LS RDS(ON) (mΩ) 68 mΩ
Frequency Typ (Hz) 1100 kHz
MinimumInput Voltage (V) 3.8 V
MaximumInput Voltage (V) 32 V
Output Current (A) 2 A
Output Voltage (V) 3.3 V
Quiescent Current Typ (mA) 0.022 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
AP63203WU-7 Active TSOT26 TPGP 3000 T&R 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-2534 2021-07-29 2021-10-29 Qualified Additional BUMP Site (LBS) and Assembly/Test (A/T) Site (CAT)