TLE42712AKSA1 Datasheet TLE42712GATMA1, TLE42712AKSA1, TLE42712SAKSA1 | P1-P3

Type Package

TLE 4271-2 PG-TO220-7-11

TLE 4271-2 S PG-TO220-7-12

TLE 4271-2 G PG-TO263-7-1

5-V Low Drop Fixed Voltage Regulator

TLE 4271-2

P-TO220-7-11

P-TO220-7-12

P-TO263-7-1

Data Sheet 1 Rev. 2.7, 2007-06-25

Features

• Output voltage tolerance ≤ ±2%

• Low-drop voltage

• Integrated overtemperature protection

• Reverse polarity protection

• Input voltage up to 42 V

• Overvoltage protection up to 65 V (≤ 400 ms)

• Short-circuit proof

• Suitable for use in automotive electronics

• Wide temperature range

• Adjustable reset and watchdog time

• Green Product (RoHS compliant)

• AEC Qualified

Functional Description

The TLE 4271-2 is functional and electrical identical to

TLE 4271.

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

maximum input voltage is 42 V (65 V, ≤ 400 ms). Up to

an input voltage of 26 V and for an output current up to

550 mA it regulates the output voltage within a 2%

accuracy. The short circuit protection limits the output

current of more than 650 mA. The IC can be switched off

via the inhibit input. An integrated watchdog monitors the

connected controller. The device incorporates

overvoltage protection and temperature protection that

disables the circuit at overtemperature.

Data Sheet 2 Rev. 2.7, 2007-06-25

TLE 4271-2

Figure 1 Pin Configuration (top view)

Table 1 Pin Definitions and Functions

Pin Symbol Function

1I Input; block to ground directly on the IC with ceramic capacitor.

2INH Inhibit

3RO Reset Output; the open collector output is connected to the

5 V output via an integrated resistor of 30 kΩ.

4GNDGround

5D Reset Delay; connect a capacitor to ground for delay time adjustment.

6WI Watchdog Input

7Q 5-V Output; block to ground with 22 µF capacitor, ESR < 3 Ω.

AEP01939

GNDINH

AEP02017

AEP01938

INH

GND

PG-TO220-7-11 PG-TO220-7-12 PG-TO263-7-1

TLE 4271-2

Data Sheet 3 Rev. 2.7, 2007-06-25

Circuit Description

The control amplifier compares a reference voltage, which is kept highly accurate by

resistance adjustment, to a voltage that is proportional to the output voltage and drives

the base of a series transistor via a buffer. Saturation control as a function of the load

current prevents any over-saturation of the power element.

The reset output RO is in high-state if the voltage on the delay capacitor

is greater or

equal

. The delay capacitor C

is charged with the current I

for output voltages

greater than the reset threshold

. If the output voltage gets lower than V

(‘reset

condition’) a fast discharge of the delay capacitor

sets in and as soon as V

gets

lower than

the reset output RO is set to low-level.

The time for the delay capacitor charge from

to V

is the reset delay time t

When the voltage on the delay capacitor has reached

and reset was set to high, the

watchdog circuit is enabled and discharges

with the constant current I

DWD

. If there is

no rising edge observed at the watchdog input,

will be discharge down to V

LDW

, then

reset output RO will be set to low and

will be charged again with the current I

DWC

until

reaches V

and reset will be set high again.

If the watchdog pulse (rising edge at watchdog input WI) occurs during the discharge

period

is charged again and the reset output stays high. After V

has reached V

the periodical behavior starts again.

Internal protection circuits protect the IC against:

• Overload

• Overvoltage

• Overtemperature

• Reverse polarity

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P23

TLE42712AKSA1

Mfr. #:

Buy TLE42712AKSA1

Manufacturer:

Infineon Technologies

Description:

IC REG LIN 5V 550MA TO220-7-11

Lifecycle:

New from this manufacturer.

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TLE42712AKSA1

TLE42712AKSA1

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