AP6501

Document number: DS36059 Rev. 1 - 2

12 of 15

www.diodes.com

September 2012

© Diodes Incorporated

AP6501

Applications Information (cont.)

PC Board Layout

This is a high switching frequency converter. Hence attention must be paid to the switching currents interference in the layout. Switching

current from one power device to another can generate voltage transients across the impedances of the interconnecting bond wires and

circuit traces. These interconnecting impedances should be minimized by using wide, short printed circuit traces.

AP6501SP-13 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. This is not applicable for the AP6501S-13.

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