The following figure shows a typical PD70210 application.

Figure 1. Basic PD70210 Block Diagram

Cinput

100 nF

Dectection

Classification

(if not

present

Class 0 for

802.3af)

PHY

Application

1

2

3

6

4

5

7

8

Start Up

Isolation

Start Up In Rush

Current Limit

DC/DC

PD70210

PD70210

VAUX

LX7309

PWM

Controller

Rdet

25K

PGOOD

The following figure shows a typical PD70210A/AL application.

Figure 2. Basic PD70210A/AL Block Diagram

Cinput

100 nF

Dectection

Classification

(if not present

Class 0 for

802.3af)

PHY

Application

1

2

3

6

4

5

7

8

Start Up

Isolation

Start Up In Rush

Current Limit

DC/DC

PD70210A/AL

PD70210A/AL

VAUX

LX7309

PWM

Controller

Rdet

25K

WA_EN

Microchip offers complete reference design packages and Evaluation Boards (EVBs). For access to these design

packages, device datasheets, or application notes, consult local Microchip Client Engagement Manager or visit

Microchip website. For technical support, consult local Embedded Solutions Engineers or go to Microchip Support.

For help in designing the DC-DC portion of circuit try MPLAB Analog Designer (MAD) tool.

PD70210/PD70210A/PD70210AL

Datasheet

DS00003695A-page 3