TH8065 Datasheet, PDF (2/40 Pages) Melexis Microelectronic Systems – Voltage Regulator with LIN Transceiver and Watchdog

TH8065
Voltage Regulator with LIN Transceiver and Watchdog
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
TH8065 – Datasheet
3901008065
Page 2 of 40
May 2006
Rev 003