TLE4476 Datasheet, PDF (8/13 Pages) Infineon Technologies AG – Dual Low-Drop Voltage Regulator

TLE 4476
Application Information
5.7 - 42 V
Ι
C_Ι
470 nF
Bandgap
Reference
Q1
3.3 V
C _Q1
22 µF
Q2
5V
C _Q2
22 µF
e.g. from
EN
Ignition
GND
AES02564
Figure 3 Application Circuit
Input, Output
The input capacitor C_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 C_Q1 and C_Q2 are necessary. Stability is guaranteed at values C_Q1 ³ 10 mF
(ESR £ 2 W) and C_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.
Data Sheet Rev. 2.3
8
2002-02-20