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
75mΩ 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.
Pin Assignments
TOP VIEW
FB 1
EN 2
VIN 3
TSOT26
6 BST
5 SW
4 GND
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)
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.
AP63300/AP63301
Document number: DS42002 Rev. 3 - 2
1 of 22
www.diodes.com
August 2019
© Diodes Incorporated
