Table of Contents

Product Overview........................................................................................................................................... 1

1.

Features....................................................................................................................................... 1

2.

Applications.................................................................................................................................. 2

1.

Functional Descriptions...........................................................................................................................5

2.

Electrical Specifications.......................................................................................................................... 7

2.1.

Absolute Maximum Ratings..........................................................................................................7

2.2.

Operating Ratings........................................................................................................................ 8

2.3.

Thermal Properties.......................................................................................................................8

2.4.

Electrical Characteristics.............................................................................................................. 9

3.

Pin Configuration...................................................................................................................................16

4.

Package Specifications......................................................................................................................... 22

4.1.

Recommended PCB Layout.......................................................................................................23

5.

Applications Information........................................................................................................................24

5.1.

Peripheral Devices..................................................................................................................... 24

5.2.

Setting Switching Frequency......................................................................................................24

5.3.

Setting Soft-Start........................................................................................................................ 24

5.4.

Setting Pulse-skip Mode Threshold............................................................................................25

5.5.

Setting UVLO/Hysteresis Thresholds.........................................................................................25

5.6.

Setting the Voltage Divider for Output Rails............................................................................... 26

5.7.

Selecting the Sense Resistor..................................................................................................... 26

5.8.

Operation with an External DC Source...................................................................................... 27

6.

Ordering Information............................................................................................................................. 30

7.

Reference Documents.......................................................................................................................... 31

8.

Revision History.................................................................................................................................... 32

The Microchip Website.................................................................................................................................33

Product Change Notification Service............................................................................................................33

Customer Support........................................................................................................................................ 33

Microchip Devices Code Protection Feature................................................................................................ 33

Legal Notice................................................................................................................................................. 34

Trademarks.................................................................................................................................................. 34

Quality Management System....................................................................................................................... 35

Worldwide Sales and Service.......................................................................................................................36

PD70211

Datasheet

DS00003672A-page 4