Diodes AP6502 - Manual (Page 12)

AP6502
Document Number: DS35423 Rev. 9 - 2
12 of 15
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January 2013
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AP6502
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.
AP6502SP-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 AP6502S-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