Siemens TLE 4270 Technical data

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5-V Low-Drop Fixed Voltage Regulator TLE 4270

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 time

• ESD protection > 4000 V

P-TO220-5-11 (P-TO220-5-1)

Type Ordering Code Package

TLE 4270 Q67000-A9209-A903 P-TO220-5-11

P-TO220-5-12 (P-TO220-5-2)

TLE 4270 S Q67000-A9243-A904 P-TO220-5-12 TLE 4270 G Q67006-A9201-A901 P-TO263-5-1

▼ TLE 4270 Q67000-A9209-A801 P-TO220-5-1 ▼ TLE 4270 S Q67000-A9243-A802 P-TO220-5-2

TLE 4270 G Q67006-A9201-A802 P-TO220-5-8

▼

P-TO263-5-1

TLE 4270 D Q67006-A9360 P-TO252-5-1

●

(P-TO220-5-8)

▼ Not for new design ● New type

Functional Description

This device is a 5-V low-drop fixed-voltage regula tor. 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 volta ge within a 2 % accuracy. The short circuit protection limits the

P-TO252-5-1 (D-PAK)

output current of more than 650 mA. Th e device incorporates overvoltage protection and temperature protection that disables the circuit at unpermissibly high temperatures.

Semiconductor Group 1 1998-11-01

Pin Configuration

AEP01923

ΙROGNDDQ

(top view)

TLE 4270

P-TO220-5-11

(P-TO220-5-1)

P-TO220-5-12

(P-TO220-5-2)

GNDDQ

AEP02172

P-TO263-5-1

(P-TO220-5-8)

GNDDQ

AEP01922

P-TO252-5-1 (D-PAK)

GND

ROΙ DQ

AEP02580

Figure 1

Pin Definitions and Functions Pin Symbol Function

1 I Input; block to ground directly on the IC with ceramic capacitor 2RO Reset Output; the open collector output is connected to the 5 V output

via an integrated resistor of 30 kΩ. 3GNDGround; internally connected to heatsink. 4D Reset Delay; connect a capacitor to ground for delay time adjustment. 5Q 5-V Output; block to ground with 22 µF capacitor, ESR < 3 Ω.

Semiconductor Group 2 1998-11-01

TLE 4270

Application Description

The IC regulates an in put vol tage in the rang e of 5.5 V <

< 36 V to V

to 26 V it produces a regulated output current of more than 550 mA. Above 26 V the save-operating-area protection allows operation up to 36 V with a regulated output current of more than 300 mA. Overvoltage protection limits operation at 42 V. The overvoltage protection hysteresis restores operation if the input voltage has dropped

below 36 V. A reset signal is generated for an output voltage of

< 4.5 V . The dela y for

power-on reset can be set externally with a capacitor.

Design Notes for External Components

An input capacitor

is necessary for compensation of lin e influences. The resonant

circuit consisting of lead inductance and input capacitance can be damped by a resistor

of approx. 1 Ω in series with the regulating circuit. Stability is guaranteed at values of

. An output capacitor CQ is necessary for the stability of

≥ 22 µF and an ESR of

< 3 Ω.

=5.0V. Up

Qnom

Circuit Description

The control amplifier compares a reference voltage, which is kept highly accurate by resistance adjustment, to a volt age that is proportion al to the output voltag e 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.

If the output voltage decreases below 4.5 V, an external capacitor discharged by the reset generator. If the volt age on this capacitor drops below

on pin 4 (D) will be

DRL

, a

reset signal is generated o n pin 2 (R O), i. e. res et ou tput i s se t low . If t he ou tput voltage

rises above 4.5 V, the voltage on the capacitor reaches

will be charged with constant current. After the power-on-reset time

and the reset output will be set high again. The

value of the power-on-reset time can be set within a wide range depending of the

capacitance of

The IC also incorporates a number of internal circuits for protection against:

• Overload

• Overvoltage

• Overtemperature

• Reverse polarity

Semiconductor Group 3 1998-11-01

TLE 4270

Input

Adjustment

Temperature

Sensor

Bandgap

Reference

Control

Amplifier

GND

Buffer

Saturation

Control and

Protection

Circuit

Reset

Generator

Output

Reset Output

Reset Delay

AEB01924

Figure 2 Block Diagram

Semiconductor Group 4 1998-11-01

Absolute Maximum Ratings

= – 40 to 150 °C

Parameter Symbol Limit Values Unit Notes

min. max.

Input

TLE 4270

Voltage Voltage Current

Reset Output

Voltage Current

Reset Delay

Voltage Current

Output

Voltage Current

V V I

V I

I I

– 42 42

– 0.3 7 V

– 1.0 16 V

V V

t ≤ 400 ms

internally limited

Internally limited

Ground

Current

GND

– 0.5 – A –

Temperat ures

Junction temperature Storage temperature

stg

– 50

150 150

°C °C

–

Optimum reliability and life time are guaranteed if the junction temperature does not exceed 125 °C in operating mode. Operation at up to the maximum junction temperature of 150 °C is possible in principle. Note, however, that operation at the maximum permitted ratings could affect the reliability of the device.

Semiconductor Group 5 1998-11-01

Operating Range

Parameter Symbol Limit Values Unit Notes

min. max.

TLE 4270

Input voltage

Junction temperature

V T

642V–

– 40 150 °C–

Thermal Resistance

Junction ambient

thja

–6570K/W

K/W TO263, TO252

Junction case R

thjc

–32K/W

K/W

t < 1ms

(TO-220/263 Packages)

Soldered in, min. footprint

Characteristics

= 13.5 V; – 40 °C ≤ Tj= ≤ 125 °C (unless otherwise specified)

Parameter Symbol Limit Values Unit Test Condition

min. typ. max.

Output voltage

4.90 5.00 5.10 V 5 mA≤ IQ≤ 550 mA;

6 V ≤

≤ 26 V

Output voltage

Output current

Qmax

4.90 5.00 5.10 V 26 V ≤ VI≤ 36 V;

≤ 300 mA

650 850 – mA VQ = 0 V

limiting Current

–11.5mAIQ = 5 mA

consumption

= II − I

Current

–5575mAIQ = 550 mA

consumption

= II– I

Current

–7090mAIQ = 550 mA; VI = 5 V

consumption

= II– I

Drop voltage

Semiconductor Group 6 1998-11-01

– 350 700 mV IQ = 550 mA

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