AP6503 Datasheet, PDF (1/13 Pages) Diodes Incorporated – 340kHz 23V 3A SYNCHRONOUS DC/DC BUCK CONVERTER

AP6503
340kHz 23V 3A SYNCHRONOUS DC/DC BUCK CONVERTER
Description
The AP6503 is a 340kHz switching frequency external
compensated synchronous DC/DC buck converter. It has
integrated low R_DSON high and low side MOSFETs.
The AP6503 enables continues load current of up to 3A with
efficiency as high as 95%.
The AP6503 features current mode control operation, which
enables fast transient response times and easy loop
stabilization.
The AP6503 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 AP6503 is available in a standard Green SO-8EP
package with exposed PAD for improved thermal
performance and is RoHS compliant.
Pin Assignments
( Top View )
BS
1
IN
2
SW
3
GND
4
8
SS
7
EN
6
COMP
5
FB
SO-8EP
Figure 1. Package Pin Out
Features
Applications
• V_IN 4.75V to 23V
• 3A continuous Output Current, 4A Peak
• V_OUT adjustable to 0.925 to 20V
• 340kHz switching frequency
• Programmable Soft-Start
• Enable pin
• Protection
• OCP
• Thermal Shutdown
• Lead Free Finish/ RoHS Compliant (Note 1)
• 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
Note:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
Typical Application Circuit
100
90
V_IN = 5V
80
V_IN = 12V
70
60
50
V_OUT = 3.3V
L = 10µH
40
0
1
2
LOAD CURRENT (A)
Efficiency vs. Load Current
AP6503
Document number: DS35077 Rev. 1 - 2
3
Figure 2. Typical Application Circuit
1 of 13
www.diodes.com
September 2011
© Diodes Incorporated