TLE 4476

Data Sheet Rev. 2.3

8

2002-02-20

Application Information

Figure 3

Application Circuit

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

³ 10 mF

(ESR

Q2

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

Ι

EN

Q1

Q2

Ι

C

470 nF

5.7 - 42 V

Ignition

e.g. from

C

22

Q1

3.3 V

C

22 F

µ

Q2

GND

5 V