TLE4675

Reset Function

Data Sheet

20

Rev. 1.0, 2008-09-30

7.2

Electrical Characteristics Reset Function

Electrical Characteristics: Reset Function

V

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

7.2.1

Output Undervoltage

Reset Lower Switching

Threshold

V

RT,lo

4.6

4.7

4.8

V

V

V

7.2.2

Output Undervoltage

Reset Upper Switching

Threshold

V

RT,hi

4.7

4.8

4.9

V

V

V

7.2.3

Output Undervoltage

Reset Switching

Hysteresis

V

RT,hy

50

100

–

mV

V

7.2.4

Output Undervoltage

Reset Headroom

V

RH

250

300

–

mV

Calculated Value:

V

V

I

Reset Output RO

7.2.5

Reset Output Low Voltage

V

RO,low

–

0.2

0.8

V

V

1V

I

7.2.6

Reset Output

Sink Current Capability

I

RO,max

0.3

–

–

mA

V

1V

V

7.2.7

Reset Output

External Pull-up Resistor

to

V

Q

R

RO

3.0

–

–

k

Ω

1V

V

1)

7.2.8

Reset Output

Leakage Current

I

RO,leak

–

5

10

µA

V

Reset Delay Timing

7.2.9

Delay Pin Output Voltage

V

D

–

–5V

–

7.2.10

Upper Delay

Switching Threshold

V

DST,hi

–

1.1

–

V

–

7.2.11

Lower Delay

Switching Threshold

V

DST,lo

–

0.3

–

V

–

7.2.12

Delay Capacitor

Charge Current

I

D,ch

–

3.5

–

µA

V

7.2.13

Delay Capacitor

Reset Discharge Current

I

DR,dsch

–

70

–

mA

V

7.2.14

Undervoltage Reset Delay

Time

t

d,100nF

16

23

30

ms

Calculated value

;

C

2)

C