TLE 4470

Data Sheet

15

Rev. 1.2, 2008-03-20

Figure 4

Reset Timing

Reset Switching Threshold

The internally set reset threshold is 4.65 V. When using the TLE 4470 G (PG-DSO-20)

this threshold can be adjusted to 3.5 V <

V

divider to pin RADJ. If this pin is not needed, it can be left open or even better connected

to GND.

R

Definitions:

•

V

•

V

(Reset adjust input current

≈ 50 nA)

The reset output pin is internally connected to the stand-by output Q1 via a 30 k

Ω pull-up

resistor. The reset LOW signal at pin RQ is guaranteed down to an output voltage

V

Q1

of 1 V typical.

AED03010_4470

Thermal

Power-on-Reset

Voltage Dip

Secondary

Overload

at Output

Spike

D,c

Ι

=

V

d

dt

V

Q

Q, rt

V

<

rr

t

at Input

Undervoltage

Shutdown

t

V

RO

D

V

t

t

t