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The AP61100Q/AP61102Q is an automotive-compliant, 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 AP61100Q/AP61102Q 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.


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified with the Following Results
  • Device Temperature Grade 1: -40°C to +125°C TA Range
  • Device HBM ESD Classification Level H3A
  • Device CDM ESD Classification Level C5
  • 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
  • Pulse Frequency Modulation
  • Pulse Width Modulation Regardless of Output Load
  • Power-Good Indicator
  • AP61102Q
  • 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)
  • The AP61100Q and AP61102Q are suitable for automotive applications requiring specific change control; these parts are AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. https://www.diodes.com/quality/product-definitions/

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 /
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Qty. Carrier
AP61100QZ6-7 Active SOT563 TPGP 3000 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Farnell, An Avnet Company 1880 9/30/2022 England Buy Now
Mouser Electronics Inc. 140 9/30/2022 South America, North America, Asia, Europe, Middle East Buy Now
RS Components - Spain 6000 9/30/2022 Spain Contact Sales
RS Components - UK 6000 9/30/2022 England Buy Now
Digi-Key Electronics 175498 9/29/2022 Europe, Asia, North America Buy Now
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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