Diodes Incorporated

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

Back to DC-DC Buck Converters - Automotive


Automotive-Compliant, 5.5V Input, 3A Low IQ Synchronous Buck Converter

Contact Sales

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


The AP61300Q/AP61302Q is an automotive-compliant, 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 stepdown DC-DC conversion.
The AP61300Q/AP61302Q 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.


  • AEC-Q100 Qualified for Automotive Applications
  • Device Temperature Grade 1: -40°C to +125°C TA Range
  • VIN: 2.4V to 5.5V
  • Output Voltage (VOUT): 0.6V to VIN
  • 3A Continuous Output Current
  • 0.6V ± 2% Reference Voltage
  • 19μA Low Quiescent Current (Pulse Frequency Modulation)
  • 2.2MHz 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
    • AP61302Q
  • 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 AP61300Q and AP61302Q are suitable for automotive
    applications requiring specific change control; these parts
    are AEC-Q100 qualified, PPAP capable, and manufactured in
    IATF 16949 certified facilities.

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Automotive
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, EN pin to set up PFM or Force PWM Power-Good 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-2675 2024-03-28 2024-03-28 Additional Wafer Source SPFAB