TLE 4276

Data Sheet Version 2.2

2

2000-10-11

Functional Description

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

voltageupto40 V to

V

(V). The maximum output current is 400 mA. The IC can be switched off via the inhibit

input, which causes the current consumption to drop below 10

←A. 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

Q

∫ 22 ←F and an ESR of ® 3 τ within the

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