TLE4678 Datasheet, PDF (21/31 Pages) Infineon Technologies AG – Low Drop Out Linear Voltage Regulator 5 V Fixed Output Voltage

TLE4678
Reset Function
Electrical Characteristics: Reset Function (cont’d)
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.
7.2.15 Power-on Reset Delay Time t_d,PWR- 30
ON,100nF
7.2.16 Internal Reset Reaction Time t_rr,int
–
7.2.17 Delay Capacitor
Discharge Time
t_rr,d,100nF –
43
56
9
15
1.5
3
ms Calculated value;
C_D = 100 nF ²⁾;
C_D discharged to 0 V;
µs
C_D = 0 nF
µs
C_D = 100 nF ²⁾
7.2.18 Total Reset Reaction Time
t_{rr,total,100nF} –
10.5 18
µs
Calculated Value:
t_rr,d,100nF + t_rr,int ;
C_D = 100 nF ²⁾
1) Related Parameters (V_RT,hi, V_RT,hy) are scaled linear when the Reset Switching Threshold is modified.
2) For programming a different delay and reset reaction time, see Chapter 7.1.
7.3
Typical Performance Characteristics Reset Function
Undervoltage Reset Switching Thresholds
Reset Delay Time t_d, t_d,PWR-ON versus
V_RT,lo, V_RT,hi versus T_j
Delay Capacitor C_D
VRT-Tj .v s d
td -CD .v s d
V_Q [V],
VRT [V]
Pin RADJ = GND
t_d ,
td ,PWR- ON
[ms]
V_Q
5.0
4,9
4,8
VRT,hi
4,7
V_RT,lo
Output Undervoltage
Reset Headroom V_RH
100
t_d,PWR-ON (typ.)
td (typ.)
10
-40 -20 0 20 40 60 80 100 120 140
1
10
T_j [°C]
100
1000
C_D [nF]
Datasheet
21
Rev. 1.1, 2009-08-27