Q67006-A9146(2001) 데이터 시트보기 (PDF) - Infineon Technologies

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Q67006-A9146
(Rev.:2001)

5-V Low-Drop Fixed Voltage Regulator

Infineon Technologies 

5-V Low-Drop Fixed Voltage Regulator

TLE 4268

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

TLE 4268 GS

TLE 4268 G

Ordering Code

Q67006-A9229

Q67006-A9146

Package

P-DSO-8-3 (SMD)

P-DSO-20-17

(SMD)

P-DSO-8-3

P-DSO-20-17

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 VI in the range 5.5 V < VI < 45 V to VQ,nom = 5.0 V. In

the event of an output voltage VQ < VRT, a reset signal is generated. The wiring of the

reset switching threshold input enables the value of VRT to be reduced. The reset delay

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

connected active controller. If there is no rising 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.

Data Sheet Rev. 1.3

1

2001-07-18

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