ADP1611ARMZ-R7 datasheet(16/20 Pages) AD

16 / 20 page

ADP1611

Rev. 0 | Page 16 of 20

LAYOUT PROCEDURE

To achieve high efficiency, good regulation, and stability, a well-

designed printed circuit board layout is required. Where

possible, use the sample application board layout as a model.

Follow these guidelines when designing printed circuit boards

(see Figure 1):

•

Keep the low ESR input capacitor, CIN, close to IN and

GND.

•

Keep the high current path from CIN through the inductor,

L1, to SW and PGND as short as possible.

•

Keep the high current path from CIN through L1, the

rectifier, D1, and the output capacitor, COUT, as short as

possible.

•

Keep high current traces as short and as wide as possible.

•

Place the feedback resistors as close to FB as possible to

prevent noise pickup.

•

Place the compensation components as close as possible to

COMP.

•

Avoid routing high impedance traces near any node

connected to SW or near the inductor to prevent radiated

noise injection.

Figure 31. Sample Application Board (Bottom Layer)

ADP1611ARMZ-R7 Datasheet(PDF) 16 Page - Analog Devices