Diodes AP65503 - Manual

AP65503
Document number: DS37127 Rev. 1 - 2
1 of 15
www.diodes.com
April 2014
© Diodes Incorporated
AP65503
LIGHT LOAD IMPROVED 5A, 750kHz SYNCH DC/DC BUCK CONVERTER
Description
The AP65503 is a 750kHz switching frequency external compensated
synchronous DC/DC buck converter. It has integrated low R
DSON
high
and low side MOSFETs.
The AP65503 enables continues load current of up to 5A with
efficiency as high as 96%.
The AP65503 implements an automatic custom light load efficiency
improvement algorithm.
The AP65503 features current mode control operation, which enables
fast transient response times and easy loop stabilization.
The AP65503 simplifies board layout and reduces space
requirements with its high level of integration and minimal need for
external components, making it ideal for distributed power
architectures.
The AP65503 is available in a standard Green SO-8EP package and
is RoHS compliant.
Features
• V
IN
4.75V to 17V
• 5A Continuous Output Current, 7A Peak
• Efficiency Up to 96%
• Automated Light Load improvement
• V
OUT
Adjustable to 2.5 to 12V
• 750kHz Switching Frequency
• External Programmable Soft-Start
• Enable Pin
• OCP with Hiccup and Thermal Protection
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
Applications
• Gaming Consoles
• Flat Screen TV sets and Monitors
• Set Top Boxes
• Distributed power systems
• Home Audio
• Consumer electronics
• Network Systems
• FPGA, DSP and ASIC Supplies
• Green Electronics
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html 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.
Typical Applications Circuit
Figure 1 Typical Application Circuit