AP6502

Document Number: DS35423 Rev. 10 - 2

1 of 14

www.diodes.com

May 2017

© Diodes Incorporated

AP6502

340kHz 18V 2A SYNCHRONOUS DC/DC BUCK CONVERTER

Description

The AP6502 is a 340kHz switching frequency external

compensated synchronous DC/DC buck converter. It has

The AP6502 enables continues load current of up to 2A with

efficiency as high as 95%.

The AP6502 features current mode control operation, which

enables fast transient response times and easy loop stabilization.

The AP6502 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 AP6502 is available in a standard Green SO-8EP package

with exposed PAD for improved thermal performance and is

RoHS compliant.

Features





Peak





340kHz Switching Frequency



Programmable Soft-Start



Enable Pin



Protection



OCP



Thermal Shutdown



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free. ―Green‖ Device (Note 3)

Pin Assignments

COMP

SW

GND

BST

EN

FB

SS

( Top View )

1

2

3

4

8

7

6

5

IN

SO-8EP

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 Application Circuit

AP6502

L1

10µH

R1

26.1k

Ω

R2

10k

Ω

C5

10nF

C2

2 x 22

μF

C1

10

μF

C4

0.1

μF

ON

OFF

2

IN

8

SS

7

EN

6

COMP

3

SW

1

BST

5

FB

C3

6.8nF

R3

6.8k

Ω

4

GND

INPUT

OUTPUT

3.3V

Figure 1 Typical Application Circuit

0

0.4

0.8

1.2

1.6

2

LOAD CURRENT (A)

Efficiency vs. Load Current

E

F

F

I

C

I

E

N

C

Y

(

%

)

L = 10µH

V

= 3.3V

OUT

40

50

60

70

80

90

100

V

= 5V

IN

V

= 12V

IN