TLE4287G(2009) 데이터 시트보기 (PDF) - Infineon Technologies

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TLE4287G
(Rev.:2009)

5-V Voltage Regulator

Infineon Technologies 

5-V Voltage Regulator

TLE 4287 G

Features

• Output voltage tolerance ≤ ±2%

• Very low standby current consumption

• Input voltage up to 42 V

• Reset function down to 1 V output voltage

• Adjustable reset time

• On/Off logic

• Overtemperature protection

• Reverse polarity protection

• Short-circuit proof

• Very wide temperature range

• Very small output capacitor

• Green Product (RoHS compliant)

• AEC Qualified

Functional Description

The TLE 4287 G is a monolithic integrated 5 V voltage regulator in PG-DSO-14

package. It supplies an output current IQ > 250 mA. The IC is short circuit proof and

incorporates temperature protection which turns off the device at overtemperature.

The input voltage VI is regulated in the range of 7.5 V < VI < 40 V to VQ,nom = 5 V.

Therefore a reference voltage, which is kept highly accurate by resistance adjustment,

is compared via a control amplifier to a voltage that is proportional to the output voltage.

The control amplifier drives the base of the series transistor by a buffer.

A comparator in the reset-generator block compares a reference voltage that is

independent of the input voltage to the scaled-down output voltage. In the case of an

output voltage VQ < 4.5 V the reset delay capacitor is discharged and a reset signal is

generated by setting the reset output LOW. The reset delay time can be set by choosing

the external capacitor over a wide range. When the output voltage rises above VQ ≥ 4.5 V

the reset delay capacitor is charged again. As soon as the delay capacitor voltage

reaches the upper switching threshold the reset output pin is set HIGH again.

Type

TLE 4287 G

Data Sheet

Package

PG-DSO-14

1

Rev. 1.4, 2009-01-12

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