AP61300/AP61302

Document number: DS43404 Rev. 3 - 2

1 of 21

www.diodes.com

November 2022

© 2022 Copyright Diodes Incorporated. All Rights Reserved.

AP61300/AP61302

2.4V TO 5.5V INPUT, 3A LOW IQ SYNCHRONOUS BUCK CONVERTER

Description

The DIODESTM 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 70

mΩ high-side power MOSFET and a 50mΩ low-

side power MOSFET to provide high-efficiency step-down DC-DC

conversion.

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.

Features



VIN: 2.4V to 5.5V



Output Voltage (VOUT): 0.6V to VIN



3A Continuous Output Current



0.6V ±2% Reference Voltage



19

μA 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



AP61302



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)



An Automotive-Compliant Part is Available Under Separate

Datasheet (AP61300Q/AP61302Q)

Pin Assignments

1

2

3

4

5

6 OUT

EN

SW

VIN

GND

FB

(Top View)

AP61300

1

2

3

4

5

6 PG

EN

SW

VIN

GND

FB

SOT563

AP61302

Applications



5V distributed power bus supplies



White goods and small home appliances



FPGA, DSP, and ASIC supplies



Network video cameras



Wireless routers



Consumer electronics



General purpose point of loads

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-

free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and

Lead-free.

3. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.