TLE4678 Datasheet, PDF (20/31 Pages) Infineon Technologies AG – Low Drop Out Linear Voltage Regulator 5 V Fixed Output Voltage

TLE4678
Reset Function
7.2
Electrical Characteristics Reset Function
Electrical Characteristics: Reset Function
V_I = 13.5 V, T_j = -40 °C to +150 °C,
all voltages with respect to ground, direction of currents as shown in Figure 7 (unless otherwise specified).
Pos. Parameter
Symbol
Limit Values
Unit Conditions
Min. Typ. Max.
Output Undervoltage Reset Comparator Default Values (Pin RADJ = GND)
7.2.1 Output Undervoltage Reset V_RT,lo
4.6
4.7
4.8
V
Lower Switching Threshold
V_I = 0 V
V_Q decreasing
RADJ = GND
7.2.2 Output Undervoltage Reset V_RT,hi
4.7
4.8
4.9
V
Upper Switching Threshold
V_I within operating range
V_Q increasing
RADJ = GND
7.2.3 Output Undervoltage Reset V_RT,hy 60
Switching Hysteresis
120 –
mV V_I within operating range
RADJ = GND.
7.2.4 Output Undervoltage Reset V_RH
Headroom
250 300 –
mV Calculated Value:
V_Q - V_RT,lo
V_I within operating range
I_Q = 50 mA
RADJ = GND
Reset Threshold Adjustment
7.2.5
7.2.6
Reset Adjust
Lower Switching Threshold
Lower Reset Threshold
Adjustment Range ¹⁾
V_RADJ,th 1.176 1.20
V_RT,adj
3.20
–
1.224 V
V_RT,lo V
V_I = 0 V
3.2 V ≤ V_Q < 5 V
–
Reset Output RO
7.2.7 Reset Output Low Voltage
V_RO,low
–
7.2.8 Reset Output
R_RO,ext
3
External Pull-up Resistor to Q
7.2.9
Reset Output
Internal Pull-up Resistor
R_RO
20
0.2
0.4
V
V_I = 0 V;
R_RO,ext = 3.3 kΩ;
1 V ≤ V_Q ≤ V_RT,low
–
–
kΩ
V_I = 0 V;
V_RO = 0.4 V
1 V ≤ V_Q ≤ V_RT,low
30
40
kΩ internally connected
to Q
Reset Delay Timing
7.2.10 Upper Delay
Switching Threshold
V_DST,hi
–
1.21 –
V
–
7.2.11 Lower Delay
Switching Threshold
V_DST,lo
–
0.30 –
V
–
7.2.12 Delay Capacitor
Charge Current
I_D,ch
–
2.8
–
µA
V_D = 1 V
7.2.13 Delay Capacitor
Reset Discharge Current
I_DR,dsch
–
80
–
mA V_D = 1 V
7.2.14 Undervoltage Reset Delay
t_d,100nF
23
31
41
ms Calculated value;
Time
C_D = 100 nF ²⁾;
C_D discharged to V_DST,lo
Datasheet
20
Rev. 1.1, 2009-08-27