ADP1046AACPZ-R7 datasheet(36/88 Pages) AD

36 / 88 page

ADP1046A

Data Sheet

Rev. 0 | Page 36 of 88

LAYOUT GUIDELINES

This section explains best practices that should be followed

to ensure optimal performance of the ADP1046A. In general,

place all components as close to the ADP1046A as possible.

All signals should be referenced to their respective grounds.

CS2+ AND CS2−

Route the traces from the sense resistor to the ADP1046A

parallel to each other. Keep the traces close together and as

far from the switch nodes as possible.

VS3+ AND VS3−

Route the traces from the remote voltage sense point to the

ADP1046A parallel to each other. Keep the traces close together

and as far from the switch nodes as possible. Place a 100 nF capac-

itor from VS3− to AGND to reduce common-mode noise.

VDD

Place the decoupling capacitors as close to the part as possible.

A 4.7 µF capacitor from VDD to AGND is recommended.

SDA AND SCL

Route the traces to these pins parallel to each other. Keep the

traces close together and as far from the switch nodes as possible.

CS1

Route the traces from the current sense transformer to the

ADP1046A parallel to each other. Keep the traces close together

and as far from the switch nodes as possible.

EXPOSED PAD

Solder the exposed pad underneath the ADP1046A to the PCB

AGND plane.

VCORE

Place a 330 nF decoupling capacitor from this pin to DGND as

close to the part as possible.

RES

Place a 10 kΩ, ±0.1% resistor from this pin to AGND as close to

the part as possible.

RTD

Route a single trace to the ADP1046A from the thermistor using

a dedicated trace to AGND. Place the thermistor close to the

hottest part of the power supply.

AGND, DGND, AND PGND

Create an AGND ground plane and make a single-point (star)

connection to the power supply system ground. Connect DGND to

AGND with a very short trace using a star connection. Connect

PGND to AGND using a star connection.

ADP1046AACPZ-R7 数据表(PDF) 36 Page - Analog Devices

ADP1046AACPZ-R7 数据表(HTML) 36 Page - Analog Devices

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