TH8065

Voltage Regulator with LIN Transceiver and Watchdog

TH8065 – Datasheet

Page 2 of 40

3901008065

May 2006

Rev 003

Contents

1.

Functional Diagram ............................................................................................................................... 4

2.

Electrical Specification.......................................................................................................................... 5

2.1

Operating Conditions ....................................................................................................................................... 5

2.2

Absolute Maximum Ratings ............................................................................................................................. 5

2.3

Static Characteristics ....................................................................................................................................... 6

2.3.1.

Voltage Regulator and Reset Unit .......................................................................................................... 6

2.3.2.

LIN Bus Interface.................................................................................................................................... 8

2.4

Dynamic Characteristics .................................................................................................................................. 9

2.5

Timing Diagrams ............................................................................................................................................ 11

3.

Functional Description ........................................................................................................................ 13

3.1

Operating Modes............................................................................................................................................ 13

3.2

Initialization .................................................................................................................................................... 15

3.3

Wake-Up ........................................................................................................................................................ 15

3.4

VSUP under voltage reset.............................................................................................................................. 16

3.5

Overtemperature Shutdown ........................................................................................................................... 16

3.6

LIN BUS Transceiver ..................................................................................................................................... 17

3.7

Linear Regulator............................................................................................................................................. 20

3.8

RESET and Watchdog ................................................................................................................................... 21

3.8.1.

RESET.................................................................................................................................................. 21

3.8.2.

Watchdog ............................................................................................................................................. 22

3.9

Mode Input EN ............................................................................................................................................... 24

4.

Application Hints ................................................................................................................................. 26

4.1

Safe Operating Area ...................................................................................................................................... 26

4.2

Low Dropout Regulator .................................................................................................................................. 27

4.3

Application Circuitry ....................................................................................................................................... 29

4.4

EMI Supressing.............................................................................................................................................. 29

4.5

Connection to Flash-MCU.............................................................................................................................. 30

5.

Operating during Disturbance............................................................................................................ 31

5.1

Operating without VSUP or GND ................................................................................................................... 31

5.2

Short Circuit BUS against VBAT .................................................................................................................... 31

5.3

Short Circuit BUS against GND...................................................................................................................... 31

5.4

Short Circuit TxD against GND ...................................................................................................................... 31

5.5

TxD open ....................................................................................................................................................... 31

5.6

Short Circuit VCC against GND ..................................................................................................................... 31

5.7

Overload of VCC ............................................................................................................................................ 31

5.8

Undervoltage VCC ......................................................................................................................................... 31

5.9

Undervoltage VSUP ....................................................................................................................................... 32

5.10

Short circuit RxD, RESET against GND or VCC ............................................................................................ 32

5.11

Short circuit CWD against GND or VCC ........................................................................................................ 32

6.

PIN Description .................................................................................................................................... 33

7.

Mechanical Specification .................................................................................................................... 34

8.

Tape and Reel Specification ............................................................................................................... 35

8.1

Tape Specification.......................................................................................................................................... 35

8.2

Reel Specification .......................................................................................................................................... 36

9.

ESD/EMC Remarks .............................................................................................................................. 37

9.1

General Remarks ........................................................................................................................................... 37

9.2

ESD-Test ....................................................................................................................................................... 37

9.3

EMC ............................................................................................................................................................... 37

10.

Revision History................................................................................................................................... 38

11.

Assembly Information ......................................................................................................................... 39

12.

Disclaimer............................................................................................................................................. 40