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.
BS
IN
SW
GND
1
2
3
4
Pin Assignments
( Top View )
8
7
6
5
SS
EN
COMP
FB
SO-8EP
Figure 1. Package Pin Out
Features
•
•
•
•
•
•
•
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)
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
•
Note:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
Typical Application Circuit
100
90
V
IN
= 5V
V
IN
= 12V
EFFICIENCY (%)
80
70
60
50
V
OUT
= 3.3V
L = 10µH
40
0
1
2
LOAD CURRENT (A)
Efficiency vs. Load Current
3
Figure 2. Typical Application Circuit
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September 2011
© Diodes Incorporated
AP6503
Document number: DS35077 Rev. 1 - 2
DIODES [ DIODES INCORPORATED ]
