Contents

1

Introduction .......................................................................2

2

Block diagram .....................................................................3

3

Device pinout......................................................................4

4

Electrical and thermal specifications ...............................................6

4.1

Absolute maximum ratings....................................................... 6

4.2

Thermal characteristics ......................................................... 6

4.3

Electrical characteristics......................................................... 7

4.4

Recommended operating conditions .............................................. 9

5

Device description................................................................10

5.1

Chip reset pin................................................................. 10

5.2

Synchronous rectifier .......................................................... 10

5.3

Main linear regulator ........................................................... 10

5.4

ASK communication ........................................................... 10

5.5

Protections ................................................................... 11

5.6

GPIOx and INTB pins .......................................................... 12

5.7

Wireless power interface ....................................................... 12

5.8

I2C interface ................................................................. 13

5.9

Register map ................................................................. 17

6

Application information ...........................................................22

6.1

Reference schematic .......................................................... 22

6.2

External components selection .................................................. 24

6.3

PCB routing guidelines ......................................................... 25

6.4

References................................................................... 25

7

Package information..............................................................26

7.1

WLCSP72 package information ................................................. 26

Revision history .......................................................................28

Contents ..............................................................................29

List of tables ..........................................................................30

List of figures..........................................................................31

STWLC68

Contents

DS13131 - Rev 3

page 29/32