TH8062 Datasheet, PDF (13/38 Pages) Melexis Microelectronic Systems – Voltage Regulator with LIN Transceiver

TH8062
Voltage Regulator with LIN Transceiver
3. Functional Description
The TH8062 consists of a low drop voltage regulator 5V/70mA and a LIN bus transceiver, which is a bi-
directional bus interface for data transfer between LIN bus and the LIN protocol controller.
Additionally integrated is a RESET unit with a fixed power-on-reset delay of 8ms (optional 4,15 or 30ms).
3.1 Operating Modes
The TH8062 provides three main operating modes “normal”, “sleep” and “low slew” and the intermediate
states “Ini-state” and “thermal shutdown”. The main modes are fixed states defined by basic actions (VSUP
start, EN or wake-up). The intermediate states are soft states. They aren’t defined by logical actions but by
changes of voltage (VSUP, VCC) or junction temperature.
VSUP power on
Set Slew_State = L
UVR / POR
VSUP > UVR_OFF
clear Reset-Timer
Start Regulator -> VCC ramp up
RESET = L
Wake-up disabled
VSUP < UVR_ON
Ini-state
VCC > Vres (4.65V) &
Slew_State=L
VCC < Vres
VSUP < UVR_ON
VCC > Vres (4.65V) &
Slew_State=H
Regulator on
RESET = L / after tres RESET=H
Wake-up disabled
LIN-Transceiver on/ normal slew mode
Normal-
Mode
EN= L/H edge & TxD=H
Tj > Tjshd
Tj < Tjrec
Tj > Tjshd
VSUP > UVR_ON &
BUS Wake-up)
EN= L/H edge & TxD=L
EN= H/L
VCC < Vres
Tj > Tjshd
Sleep-
Mode
EN=L
EN= H/L
Low Slew
Mode
thermal
shutdown
Regulator off
Wake-up disabled
LIN-Transceiver off
Regulator off
Thermal shutdown off
Wake-up enabled (LIN-Receiver on)
LIN-Transmitter off
Regulator on
RESET = L / after tres RESET=H
Wake-up disabled
Set Slew State = H
LIN-Transceiver on/ low slew mode
Figure 5 - State diagram of operating modes
TH8062 – Datasheet
3901008062
Page 13 of 38
March 2006
Rev 002