Data Sheet

3

Rev. 1.0, 2008-04-21

TLE4263-2ES

Overview

Dimensioning Information on External Components

The input capacitor

C

for the stability of the control loop. Stability is guaranteed at values

≥ 22 µF and an ESR of ≤ 3 Ω within the

operating temperature range. For small tolerances of the reset delay the capacitance’s spread of the delay

capacitor

C

Circuit Description

The control amplifier compares a reference voltage to a voltage that is proportional to the output voltage and drives

the base of the series transistor via a buffer. Saturation control as a function of the load current prevents any

oversaturation of the power element. The component also has a number of internal circuits for protection against:

•

Overload

•

Overtemperature

•

Reverse polarity

In case the externally scaled down output voltage at the reset adjust input falls below 1.35 V, the external reset

delay capacitor

C

threshold

V

the reset threshold input is connected to GND, reset is triggered at an output voltage of typically 4.65 V.