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componentes Descripción

Fabricante

4254GA

High Accuracy Low Dropout Voltage Tracking Regulator

Infineon Technologies 

TLE4254

Electrical Characteristics

5.4

Status Output (version GS / EJ S only)

The status output ST indicates an overvoltage or undervoltage situation at the regulator’s output Q. Therefore, the

output voltage VQ is compared to the reference voltage VADJ/EN. Variations of the output voltage are indicated by

a low signal at the status output ST. Transients shorter than the status reaction time tST,r will not trigger the status

output.

The status output ST is an open collector output, requiring a pull-up resisitor to a positive voltage rail.

Table 4 Electrical Characteristics Status Output ST (Version GS / EJ S only)

VI = 13.5 V; VADJ/EN ≥ 2.0 V; -40 °C ≤ Tj ≤ 150 °C; CQ = 1 µF

all voltages with respect to ground (unless otherwise specified).

Pos. Parameter

Symbol

Limit Values

Unit Test Condition

Min. Typ. Max.

5.4.21 Status switching threshold, VQ,UV

undervoltage

V V V mV ADJ/EN

ADJ/EN

ADJ/EN

- 120 - 70 - 50

VQ decreasing

5.4.22 Status switching threshold, VQ,OV

overvoltage

V V V mV ADJ/EN

ADJ/EN

ADJ/EN

+ 50 + 70 + 120

VQ increasing

5.4.23 Status reaction time

5.4.24 Status output

low voltage

5.4.25 Status output

sink current limitation

5.4.26 Status output

leakage current

tST,r

VST,low

IST,max

IST,leak

10 15 30 µs –

–

–

0.4 V

IST = 1 mA;

VI ≥ 4 V

1

–

–

mA IST = 1 mA;

VST = 0.8 V

–

0

2

µA VQ = VADJ/EN

VST = 5 V

Data Sheet

14

Rev. 1.2, 2009-11-18

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