TLE4476 datasheet(8/13 Pages) INFINEON

8 / 13 page

TLE 4476

Data Sheet Rev. 2.3

2002-02-20

Application Information

Figure 3

Application Circuit

Input, Output

The input capacitor

I is necessary for compensating line influences. Using a resistor of

approx. 1

W in series with C

I, the LC circuit of input inductivity and input capacitance can

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

capacitors

Q1 and CQ2 are necessary. Stability is guaranteed at values CQ1

³ 10 mF

(ESR

£ 2 W) and C

³ 10 mF (ESR £ 3 W) within the operating temperature range.

Enable

Using the enable feature the output 2 (5 V output) can be switched ON or OFF. The

enable input can be connected directly to terminal 30 (battery line) or 15 (ignition line). It

is also possible to control the output 2 via the microcontroller.

AES02564

Bandgap

Reference

470 nF

5.7 - 42 V

Ignition

e.g. from

µF

3.3 V

22 F

GND

5 V

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