Data Sheet

14

Rev. 1.2, 2008-03-20

TLE 4470

Input, Output

The input capacitor

C

approx. 1

be damped. To stabilize the regulation circuits of the stand-by and main regulator, output

capacitors

C

C

For the TLE 4470 G (PG-DSO-20) the output voltage

V

adjusted to 5 V

adjust pin ADJ2. For

V

main output.

For calculating

V

V

or

R

(2)

Disable

The main regulator of the TLE 4470 can be switched OFF by a voltage above 2.3 V at

pin DIS. Reducing this voltage below 1.4 V will switch ON the main regulator again.

Reset Timing

The power-on reset delay time is defined by the charging time of an external capacitor

C

C

Definitions:

•

C

•

•

I

•

•

V

The reset reaction time

t

LOW after the output voltage has dropped below the reset threshold. It is typically 2

µs

for delay capacitor of 100 nF. For other values for

C

using the following equation:

t

(4)