TLE4250-2 Datasheet, PDF (14/17 Pages) Infineon Technologies AG – Low Dropout Voltage Tracking Regulator

TLE4250-2
Electrical Characteristics
5.3
Adjust / Enable Input
In order to reduce the quiescent current to a minimum, the TLE4250-2G can be switched to stand-by mode by
setting the adjust/enable input “ADJ/EN” to “low”.
Table 3 Electrical Characteristics Adjust / Enable
V_I = 13.5 V; V_ADJ ≥ 2.5 V; -40 °C ≤ T_j ≤ 150 °C;
all voltages with respect to ground, positive current flowing into pin (unless otherwise specified).
Pos. Parameter
Symbol
Limit Values
Unit Conditions
Min. Typ. Max.
5.3.1 Adjust / Enable
Input Current
I_ADJ
–
0.1 0.5 µA V_ADJ = 5 V;
5.3.2 Adjust / Enable
Low Signal Valid
V_ADJ,low
–
–
0.4 V
V_Q = 0 V;
5.3.3
Adjust / Enable
High Signal Valid
(Tracking Region)
V_ADJ,high
2.5
–
36
V
|V_Q - V_ADJ| < 25 mV;
Typical Performance Characteristics Adjust / Enable Input
VADJ/EN = 5V (unless otherwise noted)
Startup Sequence
4250-2_startup.vsd
V [V]
Overshoot depends on
load current, C_Q , ESR _CQ
4
V
ADJ
3
2
1
dV_Q / dt =
(I -I ) / C
Q,max Load
Q
0 20 40 60 80 100 120 140
t [µs]
Data sheet
14
Rev. 1.0, 2007-07-24