AP6502

340kHz 23V 2A SYNCHRONOUS DC/DC BUCK CONVERTER

AP6502

Document Number: DS35423 Rev. 2 - 2

10 of 12

www.diodes.com

September 2011

© Diodes Incorporated

AP6502 is exposed at the bottom of the package and must

be soldered directly to a well designed thermal pad on the

PCB. This will help to increase the power dissipation.

External Bootstrap Diode

It is recommended that an external bootstrap diode be

added when the input voltage is no greater than 5V or the

5V rail is available in the system. This helps to improve the

efficiency of the regulator. This solution is also applicable

for D > 65%. The bootstrap diode can be a low cost one

such as BAT54 or a schottky that has a low Vf.

Figure 7—External Bootstrap

Compensation Components

Recommended Diodes:

Part Number

Voltage/Current

Rating

Vendor

B130

30V, 1A

Diodes Inc

SK13

30V, 1A

Diodes Inc

Ordering Information

Device

Package

Code

Packaging

(Note 7)

13” Tape and Reel

Quantity

Part Number Suffix

AP6502SP-13

SP

SO-8EP

2500/Tape & Reel

-13

Note:

7. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf.

Input capacitor C1

must be placed as

close as possible

to the IC and to L1.

34mm

52mm

External

feedback

resistor dividers

must be placed

close to the FB

i