Data Sheet

2

Rev. 1.1, 2007-09-21

TLE 4276-2

Functional Description

The TLE 4276-2 is a low-drop voltage regulator in a TO package. The IC regulates an

input voltage up to 40 V to

V

output current is 400 mA. The IC can be switched off via the inhibit input, which causes

the current consumption to drop below 10

µA. The IC is short-circuit-proof and includes

temperature protection which turns off the device at overtemperature.

Dimensioning Information on External Components

The input capacitor

C

of approx. 1

can be damped. The output capacitor

C

circuit. Stability is guaranteed at values

C

operating temperature range.

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

IC also incorporates a number of internal circuits for protection against:

•

Overload

•

Overtemperature

•

Reverse polarity