ADP1046ACPZ-R7 datasheet(36/96 Pages) AD

36 / 96 page

ADP1046

Data Sheet

Rev. 0 | Page 36 of 96

LAYOUT GUIDELINES

This section explains best practices that should be followed

to ensure optimal performance of the ADP1046. In general,

all components should be placed as close to the ADP1046 as

possible. All signals should be referenced to their respective

grounds.

CS2+ AND CS2−

The routing of the traces from the sense resistor to the ADP1046

should be laid out in parallel to each other. The traces should

also be kept close together and as far from the switch nodes as

possible.

VS3+ AND VS3−

The routing of the traces from the remote voltage sense point

to the ADP1046 should be laid out in parallel to each other.

The traces should also be kept close together and as far from

the switch nodes as possible. Place a 100 nF capacitor from VS3−

to AGND to reduce common-mode noise.

VDD

Place decoupling capacitors as close to the part as possible.

A 4.7 μF capacitor from VDD to AGND is recommended.

SDA AND SCL

The routing of the traces should be laid out in parallel to each

other. The traces should also be kept close together and as far

from the switch nodes as possible.

CS1

Run the traces from the current sense transformer to the

ADP1046 in parallel to each other. The traces should also be

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

EXPOSED PAD

The exposed pad underneath the ADP1046 should be soldered

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 ADP1046 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.

ADP1046ACPZ-R7 数据表(PDF) 36 Page - Analog Devices

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