AP6508 Datasheet, PDF (1/14 Pages) Diodes Incorporated – 500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER

AP6508
500kHz 21V 3A SYNCHRONOUS DC/DC BUCK CONVERTER
Description
Pin Assignments
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.
Features
(Top View)
IN 1
SW ²
SW ³
SW ⁴
SW ⁵
BST ⁶
EN ⁷
Exposed Pad
14 _AGND
13 _GND
12 _GND
11 _VCC
10 _SS
9 PG
8 FB
DFN4030-14
Applications
• 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)
• 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
100
V_OUT = 2.5V
90
80
70
60
50
V_IN = 12V
V_IN = 5V
40
0
1
2
3
LOAD CURRENT (A)
Efficiency vs. Load Current
AP6508
Document number: DS33437 Rev. 4 - 2
1 of 14
www.diodes.com
Typical Application Circuit
July 2011
© Diodes Incorporated