AP63300/AP63301

Document number: DS42002 Rev. 3 - 2

1 of 22

www.diodes.com

August 2019

© Diodes Incorporated

AP63300/AP63301

3.8V TO 32V INPUT, 3A LOW IQ SYNCHRONOUS BUCK WITH ENHANCED EMI REDUCTION

Description

The AP63300/AP63301 is a 3A, synchronous buck converter with a

wide input voltage range of 3.8V to 32V. The device fully integrates a

75

mΩ high-side power MOSFET and a 40mΩ low-side power

MOSFET to provide high-efficiency step-down DC-DC conversion.

The AP63300/AP63301 device is easily used by minimizing the

external component count due to its adoption of peak current mode

control along with its integrated loop compensation network.

The AP63300/AP63301 design is optimized for Electromagnetic

Interference (EMI) reduction. The device has a proprietary gate driver

scheme to resist switching node ringing without sacrificing MOSFET

turn-on and turn-off times, which reduces high-frequency radiated

EMI noise caused by MOSFET switching. AP63300 also 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.

The device is available in a TSOT26 package.

Features



VIN 3.8V to 32V



3A Continuous Output Current



0.8V ± 1% Reference Voltage



22µA Low Quiescent Current (Pulse Frequency Modulation)



500kHz Switching Frequency



Supports Pulse Frequency Modulation (PFM)

o

AP63300

o

Up to 88% Efficiency at 5mA Light Load



Pulse Width Modulation (PWM) Regardless of Output Load

o

AP63301



Proprietary Gate Driver Design for Best EMI Reduction



Frequency Spread Spectrum (FSS) to Reduce EMI

o

AP63300



Low-Dropout (LDO) Mode



Precision Enable Threshold to Adjust UVLO



Protection Circuitry

o

Undervoltage Lockout (UVLO)

o

Output Overvoltage Protection (OVP)

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)

Pin Assignments

1

2

3

4

5

6

FB

EN

VIN

GND

SW

BST

TSOT26

TOP VIEW

Applications



5V, 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



Gaming Consoles



Consumer Electronics



General Purpose Point of Load

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.