AP63300Q/AP63301Q

Document number: DS43699 Rev. 1 - 2

1 of 22

www.diodes.com

May 2021

© Diodes Incorporated

AP63300Q/AP63301Q

AUTOMOTIVE-COMPLIANT, 32V, 3A LOW IQ SYNCHRONOUS BUCK CONVERTER

Description

The

AP63300Q/AP63301Q

is

an

automotive-compliant,

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 40

mΩ low-side power MOSFET to provide high-efficiency step-

down DC-DC conversion.

The AP63300Q/AP63301Q 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 AP63300Q/AP63301Q 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. The AP63300Q 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



AEC-Q100 Qualified for Automotive Applications



Device Temperature Grade 1: -40°C to +125°C TA Range



VIN: 3.8V to 32V



Output Voltage (VOUT): 0.8V to VIN



3A Continuous Output Current



0.8V ±1% Reference Voltage



22µA Low Quiescent Current (Pulse Frequency Modulation)



500kHz Switching Frequency



Supports Pulse Frequency Modulation (PFM)



AP63300Q



Up to 88% Efficiency at 5mA Light Load



Pulse Width Modulation (PWM) Regardless of Output Load



AP63301Q



Proprietary Gate Driver Design for Best EMI Reduction



Frequency Spread Spectrum (FSS) to Reduce EMI



AP63300Q



Low-Dropout (LDO) Mode



Precision Enable Threshold to Adjust UVLO



Protection Circuitry



Undervoltage Lockout (UVLO)



Output Overvoltage Protection (OVP)



Cycle-by-Cycle Peak Current Limit



Thermal Shutdown



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free. “Green” Device (Note 3)



The AP63300Q and AP63301Q 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/

Pin Assignments

1

2

3

4

5

6

FB

EN

VIN

GND

SW

BST

TSOT26

(Top View)

Applications



Automotive Power Systems



Automotive Infotainment



Automotive Instrument Clusters



Automotive Body Electronics and Lighting



Automotive Telematics



Advanced Driver Assistance Systems

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.