TLE7272-2 Datasheet, PDF (16/21 Pages) Infineon Technologies AG – 5-V Low Dropout Voltage Regulator

TLE7272-2
Electrical Characteristics
5.5
Electrical Characteristics Reset Function
The Reset function informs e.g. the microcontroller in case the output voltage has fallen below the lower threshold
VRT of typ. 4.65 V. The headroom VRH between the output voltage and the reset threshold is typically 350 mV.
Connecting the regulator to a battery voltage at first the reset signal remains LOW. When the output voltage has
reached the reset threshold VRT the reset output RO remains still LOW for the reset delay time tRD (typ. 16 ms).
Afterwards the reset output turns HIGH.
Electrical Characteristics Reset
V_I =13.5 V; – 40 °C < T_j < 150 °C; all voltages with respect to ground (unless otherwise specified)
Pos. Parameter
Symbol Limit Values
Unit Conditions
Min. Typ. Max.
5.5.1 Output Undervoltage Reset
V_RT
4.50 4.65 4.80 V
V_Q decreasing
Switching Threshold
V_I = 6V
5.5.2 Output Undervoltage Reset
V_RH
–
350 –
mV –
Headroom
5.5.3 Reset Output Low Level Voltage V_ROL
–
5.5.4 Integrated Reset Pull Up Resistor R_RO
15
5.5.5 Optional External Reset Pull Up R_RO,ext 10
Resistor
0.2 0.4 V
R_RO = 10 kΩ;
V_Q > 1 V
30 45 kΩ –
–
–
kΩ –
5.5.6 Power On Reset Delay Time
t_RD
5.5.7 Reset Reaction Time
t_RR
10 16 22 ms –
–
–
12 µs –
Data Sheet
16
Rev. 1.0, 2009-06-01