TH8061 Datasheet, PDF (19/36 Pages) Melexis Microelectronic Systems – Voltage Regulator with integrated LIN Transceiver

TH8061
Voltage Regulator with integrated LIN Transceiver
3.7 Linear Regulator
The TH8061 has an integrated low drop linear regulator with a p-channel-MOSFET as driving transistor. This
regulator outputs a voltage of 5V ±2% and a current of ≤50mA within an input voltage range of
5.5V ≤ V_SUP ≤ 18V. The current limitation unit limits the output current for short circuits or overload to 100mA
respectively drop-down of the V_CC voltage.
6
5
4
3
2
1
0
0
20
40
60
80
100
120
I_VCC [mA]
Figure 15 - Characteristic of current limitation VCC = f(I_VCC)
3.8 RESET
The RESET pin outputs the reset state of the TH8061. This output is switched from low to high if V_SUP is
switched on and V_CC>V_RES after the time t_Res.
VSUP
VCC
V_RES
RESET
T>Tj T<Tj
t<t_rr
t_Res
t_rr
t_Res
t<t_rr
t_Res
t_Res
Initialisation
Thermal
shutdown
Spike VSUP
Low voltage
Current limitation
VSUP Spike VCC
active
Figure 16 - Reset behaviour
If the voltage V_CC drops below V_RES then the RESET output is switched from high to low after the time t_rr has been
reached. For this reason short breaks of the V_CC voltage and uncontrolled reset generations will be inhibited.
The circuitry of the RESET output driver guarantees, that the reset low level during decreasing of the V_CC
voltage will be hold sure (s.a.Figure 17).
TH8061 – Datasheet
3901008061
Page 19 of 36
June 2004
Rev 007