TH8061 Datasheet, PDF (15/36 Pages) Melexis Microelectronic Systems – Voltage Regulator with integrated LIN Transceiver

TH8061
Voltage Regulator with integrated LIN Transceiver
VSUP
V _{SUVR_OFF}
V_{SUVR_ON}
UVR
VCC
POR
EN=H/L
POR
UVR
normal mode
sleep mode
normal mode
Figure 11 - Operating of power-on and under-voltage reset
After POR the voltage regulator starts and VCC will be output. If V_CC>V_MRes the bus interface will be
activated. If the V_CC voltage level is higher than V_RES, the reset time t_Res = 100ms is started. After t_Res the
RESET output switches from low to high (see Figure 16).
Start of Linear Regulator via Wake-up
The initialization is only being done for the VCC circuitry parts. This procedure begins with leaving the master
reset state (V_CC > V_MRes) and runs in the same manner as the VSUP-Power-On.
3.3 Wake-Up
If the regulator is put into sleep mode it can be wake up with the BUS interface. Every pulse on the BUS
(high pulse or low pulse) with a pulse width of min. 60µs switches on the regulator.
After the BUS has wake up the regulator, it can only be switched off with a high level followed by a low level
on the EN pin.
TH8061 – Datasheet
3901008061
Page 15 of 36
June 2004
Rev 007