New Industry Products

Diodes Inc. Releases 5.5V, 3A, Synchronous COT Buck Converter

April 03, 2021 by Hailey Stewart

This article highlights Diodes Incorporated AP61300/AP61302 that is a 3A, synchronous buck converter with a wide input voltage range of 2.4V to 5.5V

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 lowside power MOSFET to provide high-efficiency step-down DC-DC conversion. The AP61300/AP61302 can be set to operate in either Pulse Width Modulation (PWM) regardless of load or Pulse Frequency Modulation (PFM) with up to 84% efficiency at 5mA light load (5VIN, 1.8VOUT). 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.


Image courtesy of Diodes Incorporated
Image courtesy of Diodes Incorporated


  • The Diodes Advantage

           The AP61300/AP61302 provides a high-efficiency DC-DC solution for general POL applications.High Efficiency @ Light Loads

                - 0.1µA shutdown current 

                - Low 19µA quiescent current in PFM Operation

  • High Design Flexibility

                - Wide input range from 2.4V – 5.5V

                - Wide Output Voltage range: 0.6V to VIN

                - Multifunctional EN Pin to Control PFM and PWM operation modes

                - Built-in PG with Internal 5MΩ Pull-Up Resistor (AP61302) COT control minimizes external component count

  • High Robustness

                - Utilizes both high-side and low-side current sense protection

  • Ease of Layout Design

                - 2.2MHz switching frequency allows the use of small passive 

                - COT control minimizes external component count



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About Diodes Incorporated

Diodes Incorporated is a leading global manufacturer and supplier of high-quality application-specific standard products within the broad discrete, logic, analog and mixed-signal semiconductor markets. Diodes serve the consumer electronics, computing, communications, industrial, and automotive markets. Diodes’ products include diodes, rectifiers, transistors, MOSFETs, protection devices, function-specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors, power management devices, including LED drivers, AC-DC converters and controllers, DC-DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers.