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Diodes AP6508 User Manual

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AP6508
500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER
AP6508
Document number: DS33437 Rev. 5 - 2
1 of 14
www.diodes.com
October 2011
© Diodes Incorporated
NEW PRODUCT
Description
The AP6508 is a 500kHz switching frequency internal
compensated synchronous DCDC buck converter. It has
integrated compensation, and low R
DSON
high and low side
MOSFETs.
The AP6508 enables continues load current of up to 3A with
efficiency as high as 93%.
The AP6508 features current mode control operation, which
enables fast transient response times and easy loop
stabilization.
The AP6508 has external programmable softstart and a
Power Good indicator enabling sequencing and ramp control.
The AP6508 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 AP6508 is available in a standard Green DFN4030-14
package with exposed PAD for improved thermal
performance and is RoHS compliant.
Pin Assignments
SW
BST
SW
PG
SW
AGND
GND
GND
96
5
4
3
2
1
12
13
14
11
10
SW
IN
DFN4030-14
Exposed Pad
(Top View)
SS
VCC
EN
7
FB
8
Features
• V
IN
4.5V to 21V
• V
OUT
adjustable to 0.8V
• 500kHz switching frequency
• Enable pin
• External Softstart
• Power Good
• Protection
o OCP
o Thermal Shutdown
• Lead Free Finish/ RoHS Compliant (Note 1)
Applications
• Gaming Consoles
• TV sets and Monitors
• Set Top Boxes
• Distributed power systems
• Home Audio
• Consumer 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
Typical Application Circuit
40
50
60
70
80
90
100
0
2
1
3
LOAD CURRENT (A)
Efficiency vs. Load Current
V = 12V
V = 5V
L = 3.3µH
IN
OUT
E
F
F
I
C
IEN
C
Y
(%)
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Summary of Contents

Page 1 - (Top View)

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 1 of 14 www.diodes.com October 2011 © Diodes Incorp

Page 2 - © Diodes Incorporated

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 10 of 14 www.diodes.com October 2011 © Diodes Incor

Page 3

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 11 of 14 www.diodes.com October 2011 © Diodes Incor

Page 4

NEW PRODUCT AP6508 Document number Ordering I DeviceAP6508FENote: 7. Pad http Marking InPackage O r:

Page 5 - 5 of 14

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 12 of 14 www.diodes.com October 2011 © Diodes Incor

Page 6 - (cont.)

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 13 of 14 www.diodes.com October 2011 © Diodes Incor

Page 7 - C, unless otherwise noted

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 2 of 14 www.diodes.com October 2011 © Diodes Incorp

Page 8

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 3 of 14 www.diodes.com October 2011 © Diodes Incorp

Page 9 - 9 of 14

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 4 of 14 www.diodes.com October 2011 © Diodes Incorp

Page 10 - October 2011

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 5 of 14 www.diodes.com October 2011 © Diodes Incorp

Page 11 - ESR*ΔIVout

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 6 of 14 www.diodes.com October 2011 © Diodes Incorp

Page 12 - Incorporated

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 7 of 14 www.diodes.com October 2011 © Diodes Incorp

Page 13 - Tape Orientation (Note 8)

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 8 of 14 www.diodes.com October 2011 © Diodes Incorp

Page 14

AP6508500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER AP6508 Document number: DS33437 Rev. 5 - 2 9 of 14 www.diodes.com October 2011 © Diodes Incorp

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