Diodes AP63356Q-EVM User Manual

DESCRIPTION
The AP63356Q/AP63357Q is a 3.5A, synchronous
buck converter with a wide input voltage range of
3.8V to 32V and fully integrates an 74mΩ high-
side power MOSFET and a 40mΩ low-side power
MOSFET to provide high-efficiency step-down
DC/DC conversion.
The AP63356Q/AP63357Q device is easily used
by minimizing the external component count due
to its adoption of peak current mode control along
with the integrated compensation network.
FEATURES

Qualified for Automotive Applications

AEC-Q100 Qualified with the Following
Results
o Device Temperature Grade 1: -40C to
125C T Range
A
o Device HBM ESD Classification Level H1C
o Device CDM ESD Classification Level C3B

VIN 3.8V to 32V

3.5A Continuous Output Current

0.8V ± 1% Reference Voltage

22µA Ultralow Quiescent Current (Pulse
Frequency Modulation)

450kHz Switching Frequency

Pulse Width Modulation (PWM) Regardless of
Output Load
o AP63356Q

Supports Pulse Frequency Modulation (PFM)
o AP63357Q
o Up to 80% Efficiency at 1mA Light Load
o Up to 87% Efficiency at 5mA Light Load
AP63356Q/AP63357Q
Document number: DSxxxxRev. 1 - 1
3.8V TO 32V INPUT, 3.5A LOW IQ SYNCHRONOUS BUCK WITH
The AP63356Q/AP63357Q has optimized design
for Electromagnetic Interference (EMI) reduction.
The converter
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. It also 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 device is available in a 2x3mm W-QFN2030-13
package.

Proprietary Gate Driver Design for Best EMI
Reduction

Frequency Spread Spectrum (FSS) to
Reduce EMI

Power Good Indicator with 5M Internal Pull-up

Precision Enable Threshold to Adjust UVLO

Protection Circuitry
o Undervoltage Lockout (UVLO)
o Output Overvoltage Protection (OVP)
o Output Undervoltage Protection (UVP)
o Cycle-by-Cycle Peak Current Limit
o Thermal Shutdown

Totally Lead-Free & Fully RoHS Compliant
Halogen and Antimony Free. "Green" Device
1 of 11
www.diodes.com
AP63356/7/Q-EVM
ENHANCED EMI REDUCTION
features Frequency Spread
August 2019
© Diodes Incorporated