P-DSO-8-1

P-DSO-20-6

5-V Low-Drop Fixed Voltage Regulator

TLE 4268

Semiconductor Group

1

1998-11-01

Features

• Output voltage tolerance

≤ ± 2%

• Very low current consumption

• Low-drop voltage

• Watchdog

• Settable reset threshold

• Overtemperature protection

• Reverse polarity protection

• Short-circuit proof

• Suitable for use in automotive electronics

• Wide temperature range

Type

Ordering Code

Package

TLE 4268 GS

Q67006-A9229

P-DSO-8-1 (SMD)

TLE 4268 G

Q67006-A9146

P-DSO-20-6 (SMD)

Functional Description

This device is a 5-V low-drop fixed-voltage regulator. The maximum input voltage is

45 V. It can deliver an output current of at least 180 mA. The IC is short-circuit proof and

features temperature protection that disables the circuit in the event of impermissibly

high temperatures. The watchdog function is disabled as a function of the load, so that

a controller is not interrupted during sleep mode by a watchdog reset.

Application Description

The IC regulates an input voltage

V

the event of an output voltage

V

reset switching threshold input enables the value of

V

time can be adjusted using an external capacitor. The integrated watchdog monitors the

connected active controller. If there is no positive-going edge at the watchdog input, the

reset output is set to low. The reset delay capacitor provides a wide adjustment range

for the pulse repetition time. The watchdog function is only activated if the load exceeds

8 mA. This ensures that a microcontroller is not activated during power-down and the

current drain is not increased. The IC is protected against overload and

overtemperature.