lnfineon TLE 4271-2 User Manual

现货库存、技术资料、百科信息、热点资讯，精彩尽在鼎好!

5-V Low-Drop Fixed Voltage Regulator TLE 4271-2

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

Type Ordering Code Package

TLE 4271-2 Q67000-A9446 P-TO220-7-11
TLE 4271-2 S Q67000-A9448 P-TO220-7-12
TLE 4271-2 G Q67006-A9447 P-TO263-7-1

Functional Description

P-TO220-7-11

P-TO263-7-1

The TLE 4271-2 is functional and electrical identical to
the TLE 4271.

The device is a 5-V low-drop fixed-voltage regulator.
The maximum input voltage i s 42 V (65 V,

≤ 400 ms).

P-TO220-7-12

Up to an input voltage of 26 V and for an output current
up to 550 mA it regul ates 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 integ rated watchdog monitors the
connected controller. The devi ce incorporates overvoltage prot ection and temperature
protection that disables the circuit at overtemperature.

Data Sheet Rev. 2.4 1 2001-04-04

AEP01939

GNDINH

Ι

ROWID

Q

17

P-TO220-7-11 P-TO263-7-1P-TO220-7-12

1

TLE 4271-2

17

Q

Ι

7

INHROGND

D

WI

AEP01938

Ι

RO

GNDINH

Q

D

WI

AEP02017

Figure 1 Pin Configuration (top view)

Pin Definitions and Functions
Pin Symbol Function

1 I 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 k

Ω.

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

Data Sheet Rev. 2.4 2 2001-04-04

µF capacitor, ESR < 3 Ω.

TLE 4271-2

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.

The reset output RO is in high-state if the voltage on the delay capacitor
equal
greater than the reset threshold
condition’) a fast discharge of the delay capacitor
than

The time for the delay capacitor charge from
When the voltage on the delay capacitor has reached

watchdog circuit is enabled and discharges
no rising edge observed at the watch dog input,
reset output RO will be set to low and

V

V

. The delay capacitor CD is charged with the current ID for output voltages

UD

V

. If the output voltage gets lower than VRT (’reset

RT

V

the reset output RO is set to low-level.

LD

C

will be charged again with the current I

D

reaches VUD and reset will be set high again.

D

C

sets in and as soon as VD gets lower

D

V

to VLD is the reset delay time tD.

UD

V

and reset was set to high, the

UD

C

with the constant current I

D

C

will be discharge down to V

D

C

is greater or

D

. If there is

DWD

LDW

DWC

, then

until

If the watchdog pulse (rising edge at watchdog inp ut WI) occurs during the disch arge

C

period

is charged again and the reset output stays high. After VD has reached VUD,

D

the periodical behavior starts again.
Internal protection circuits protect the IC against:

• Overload

• Overvoltage

• Overtemperature

• Reverse polarity

Data Sheet Rev. 2.4 3 2001-04-04

TLE 4271-2

1

Ι

Adjustment

Temperature

Sensor

Control

Amplifier

Bandgap

Reference

INH GND

+

-

Buffer

Saturation

Control and

Protection

Circuit

42

Reset

Generator

Watchdog

7

Q

3

RO

5

D

6

WI

AEB01940

Figure 2 Block Diagram

Data Sheet Rev. 2.4 4 2001-04-04

Absolute Maximum Ratings

T

= – 40 to 150 °C

j

Parameter Symbol Limit Values Unit Notes

min. max.

Input

TLE 4271-2

Voltage
Voltage
Current

Inhibit

Voltage
Voltage
Current

Reset Output

Voltage
Current

Reset Delay

Voltage
Current

V
V
I

V
V
I

V
I

V
I

I
I

I

INH
INH

INH

RO

RO

D

D

– 42
–
–

– 42
–
–

– 0.3
–

– 0.3
– 5

42
65

–

42
65

–

42

–

7
5

V
V
mA

V
V
mA

V
mA

V
mA

–

t ≤ 400 ms

internally limited

–

t ≤ 400 ms

internally limited

–

internally limited

–
–

Watchdog

Voltage
Current

V
I

W

W

– 0.3
– 5

7
5

V
mA

–
–

Output

Voltage
Current

V
I

Q

Q

– 1.0
– 5

16

–

V
mA

–

internally limited

Ground

Current

I

GND

– 0.5 – A –

Temperatures

Junction temperature
Storage temperature

Data Sheet Rev. 2.4 5 2001-04-04

T

j

T

stg

–
– 50

150
150

°C
°C

–
–

Operating Range

Parameter Symbol Limit Values Unit Notes

min. max.

TLE 4271-2

Input voltage
Junction temperature

Thermal Resistance

Junction ambient

Junction case

V
T

R

R
Z

I

j

thja

thjc

thjc

640V–

– 40 150 °C –

– 65

70

–
–

3
2

K/W
K/W–P-TO263

K/W
K/W

–

t < 1ms

Data Sheet Rev. 2.4 6 2001-04-04

TLE 4271-2

Characteristics

V

= 13.5 V; – 40 °C ≤ Tj= ≤ 125 °C; V

I

Parameter Symbol Limit Values Unit Test Condition

min. typ. max.

INH

> V

(unless otherwise specified)

U,INH

Output voltage

Output voltage

Output current
limiting

Current
consumption

I

= I

q

I

Current
consumption

I

= I

q

I

Current
consumption

I

= II– I

q

Q

Current
consumption

I

= II– I

q

Q

V

Q

V

Q

I

Qmax

I

q

I

q

I

q

I

q

4.90 5.00 5.10 V 5 mA ≤ I

6 V

≤ VI≤ 26 V

4.90 5.00 5.10 V 26 V ≤ V

I

≤ 300 mA;

Q

≤ 550 mA;

Q

≤ 36 V;

I

650 800 – mA VQ = 0 V

––6 µA V

– 800 – µA V

= 0 V; IQ = 0 mA

INH

= 5 V; IQ = 0 mA

INH

– 11.5mAIQ = 5 mA

– 55 75 mA IQ = 550 mA

Current

I

q

– 70 90 mA IQ = 550 mA; VI = 5 V

consumption

I

= II– I

q

Drop voltage
Load regulation ∆V

Supply voltage
regulation

Power supply
Ripple rejection

1)

Drop voltage = VI– VQ (measured when the output voltage has dropped 100 mV from the nominal value
obtained at 13.5 V input)

Data Sheet Rev. 2.4 7 2001-04-04

Q

V

dr

∆V

Q

Q

– 350 700 mV IQ = 550 mA
– 25 50 mV IQ = 5 to 550 mA;

– 12 25 mV VI = 6 to 26 V

PSRR – 54 – dB f

V

= 6 V

I

I

= 5 mA

Q

=100Hz;

r

V

=0.5V

r

1)

PP

TLE 4271-2

Characteristics (cont’d)

V

= 13.5 V; – 40 °C ≤ Tj= ≤ 125 °C; V

I

Parameter Symbol Limit Values Unit Test Condition

min. typ. max.

Reset Generator

INH

> V

(unless otherwise specified)

U,INH

Switching threshold
Reset hi gh voltage
Saturation voltage

Saturation voltage

Reset pull-up

Lower reset timing
threshold

Charge current I
Upper timing

threshold
Delay time t
Reset reaction time

V

RT

V

ROH

V

RO,SAT

V

RO,SAT

R

V

LD

D

V

UD

D

t

RR

4.5 4.65 4.8 V –

4.5 ––V –
– 60 – mV R

1.0 V

=30 kΩ;

intern

≤ VQ ≤ 4.5 V

– 200 400 mV IR = 3 mA1);

V

= 4.4 V

Q

18 30 46 KΩ internally connected

to Q

0.2 0.45 0.8 V V

Q

< V

RT

81425µA VD = 1.0 V

1.4 1.8 2.3 V –

81318msCD = 100 nF
––3 µs CD = 100 nF

Overvoltage Protection

Turn-off voltage

V

I, ov

40 44 46 V –

Inhibit

Turn-on voltage
Turn-off voltage
Inhibit current

1)

Test condition not applicable during delay time for power-on reset .

Data Sheet Rev. 2.4 8 2001-04-04

V
V
I

INH

U,INH

L,INH

1.0 2.0 3.5 V VQ = high (> 4.5 V)

0.8 1.3 3.3 V VQ = low (< 0.8 V)
81225µA V

INH

= 5 V

TLE 4271-2

Characteristics (cont’d)

V

= 13.5 V; – 40 °C ≤ Tj= ≤ 125 °C; V

I

Parameter Symbol Limit Values Unit Test Condition

min. typ. max.

Watchdog

INH

> V

(unless otherwise specified)

U,INH

Upper watchdog
switching threshold

Lower watchdog
switching threshold

Discharge current
Charge current
Watchdog period
Watchdog trigger

time
Watchdog pulse

slew rate

V

V

I

DWD

I

DWC

t

WD,P

t

WI,tr

V

UDW

LDW

WI

1.4 1.8 2.3 V –

0.2 0.45 0.8 V –

1.5 2.7 3.5 µA VD = 1 V
81425µA VD = 1 V
40 55 80 ms CD = 100 nF
30 45 66 ms CD = 100 nF

see diagr am

5 ––V/µs from 20% to 80% V

Q

Data Sheet Rev. 2.4 9 2001-04-04

TLE 4271-2

Ι

Ι

µ

1000 F

V

Ι

Figure 3 Test Circuit

470 nF

V

INH

Ι

17

Q

µ

22 F

TLE 4271-2

Ι

RO

32

V

5

Ι

D

V

D

C

6

V

D

WI

4

Ι

GND

V

Q

RO

AES01941

Input

Input
e.g. KL 15

Reset
to MC

Watchdog
Signal
from MC

Figure 4 Circuit

470 nF

1

2

TLE 4271-2

3

4

6

7

5 V-Output

22 F

µ

5

100 nF

AES01942

Data Sheet Rev. 2.4 10 2001-04-04

Application Description

TLE 4271-2

The IC regulates an input voltage in the range of 6 V <

V

< 40 V to V

I

= 5.0 V. Up to

Qnom

26 V it produces a regulated output current of more than 550 mA. Above 26 V the save­operating-area protection allows opera tion 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. The
IC can be switch ed off v ia the inhibit i nput, wh ich caus es the quiescen t current to drop
below 50

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

<4.5V. The

Q

watchdog circuit monitors a connected controller. If there is no positive-going edge at the
watchdog input within a fixed time, the reset output is set to low. The delay for power-on
reset and the maximum pe rmitted watchdog-pulse period can b e set externally with a
capacitor.

Design Notes for External Components

An input capacitor

C

is necessary for compensation of lin e influences. The resonant

I

circuit consisting of lead inductance and input capacitance can be damped by a resistor
of approx. 1

Ω in series with C

the regulating circuit. Stability is guaranteed at values of

Ω.

<3

. An output capacitor CQ is necessary for the stability of

I

C

≥ 22 µF and an ESR of

Q

Reset Circuitry

If the output voltage decreases belo w 4.5 V, an external capacitor
discharged by the reset generator. If th e voltage on th is capacito r drops below

C

on pin D will be

D

V

DRL

, a

reset signal is generated on pin RO, i.e. reset output is set low. If the output voltage rises

C

above the reset threshold,
reset time the voltage on the capacitor reaches

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

D

V

and the reset output will be set high

DU

again. The value of the power-o n-reset t ime can be set wit hin a w ide range depending

C

of the capacitance of

.

D

Reset Timing

The power-on reset delay time is defi ned by the charging time of an external capacito r

C

which can be calculated as follows:

d

t

D

= C

∗∆V/I

D

D

Definitions: CD= delay capacitor

t

= reset delay time

D

I

= charge current , typical 14 µA

D

∆V = V

V

UD

, typical 1.8 V

UD

= upper delay timing threshold at CD for reset delay time

Data Sheet Rev. 2.4 11 2001-04-04

TLE 4271-2

The reset reaction time trr is the time it takes the voltage regula tor to set the reset out
LOW after the output voltage has drop ped bel ow the res et thresh old. It i s typic ally 1
for delay capacitor of 47 nF. For other values for

C

the reaction time can be estimated

d

using the following equation:

t

≈ 20 s/F × C

RR

V

Ι

d

µs

V

U, INH

V

L, INH

V

D, SAT

V

INH

t<

V

Q

V

RT

t

V

D

V

UD

V

LD

V

RO

dt

Ι

Vd

D

=

C

D

t

D

RR

RR

t

t

t

t

V

RO, SAT

t

Power
Reset Shutdown

Thermal Voltage Drop

at Input

Undervoltage
at Output

Secondary

Load Shutdownon

Spike Bounce

AET01985

Figure 5 Time Response

Data Sheet Rev. 2.4 12 2001-04-04

Watchdog Timing

V

WΙ

V

Ι

V

Q

TLE 4271-2

t

+

DWC

WΙ, tr

Ι

DWD

V

D

V

UDW

V

LDW

V

R

t

WΙ, tr

V

V

-

()

UDW

Ι

DWD

LDW

t

C

;

WD, P

D

=

V

-

()()

UDW

=

Ι

V

LDW

.

Ι

DWCΙDWD

Figure 6 Time Response, Watchdog Behavior

t

WD, P

t

WD, L

V

V

-

()

UDW

Ι

DWC

LDW

C

D

AES03078

=

t

C

;

WD, L

D

Data Sheet Rev. 2.4 13 2001-04-04

Typical Performance Characteristics

V

T

Q

j

versus

V

= 13.5 V

I

AED01928

Output Voltage
Temperature

5.2
V

V

Q

5.1

Output Voltage VQ versus
Input Voltage

12

V

V

Q

10

V

I (VINH

= VI)

TLE 4271-2

AED01929

5.0

4.9

4.8

4.7

4.6

-40 04080120 ˚C 160

T

j

8

6

R

= 25

Ω

L

4

2

0

0

2

4

68

10

V

V

Ι

Data Sheet Rev. 2.4 14 2001-04-04

TLE 4271-2

Output Current Limit IQ versus
Temperature

1200

mA

I

Q max

1000

800

600

400

200

T

j

0

-40 04080120 ˚C 160

AED01930

T

j

Output Current IQ versus
Input Voltage

1.2
A

I

Q

1.0

0.8

0.6

0.4

0.2

0

0 10 20 30 40 V50

V

I

= 125 ˚C

T

j

25 ˚C

AED01931

V

I

Current Consumption I
versus Output Current I

6

mA

Ι

q

5

4

3

V

= 13.5 V

Ι

2

1

0

20 40 60 80 120

0

q

Q

AED03076

Current Consumption I
versus Output Current I

80

mA

Ι

q

q

Q

AED03077

70

60

50

40

30

= 13.5 V

V

Ι

20

10

0

100 200 300 400 600

mA

Ι

Q

0

mA

Ι

Q

Data Sheet Rev. 2.4 15 2001-04-04

TLE 4271-2

Current Consumption I
versus Input Voltage V

120

mA

I

q

100

80

60

40

20

0

0 10 20 30 40 V50

R

R

q

I

L

L

= 10

20

=

50

AED01934

Ω

Ω
Ω

V

Drop Voltage Vdr versus
Output Current

800

mV

V

Dr

700

600

500

400

300

200

100

0

I

I

Q

T

= 125 C

j

2000 400

AED02755

T

= 25 C

j

600 1000

mA

Ι

Q

Inhibit Current I

INH

versus Inhibit Voltage

12

µ

A

Ι

INH

10

Ι

INH, on

8

6

4

2

0

0

Ι

1

INH, off

2

3

V

INH

Ι

INH, high

V

Ι

T

j

AED01944

= 13.5 V
= 25 C

4

V

5

INH

Output Voltage V
versus Inhibit Voltage V

Q

INH

AED01945

6

V

V

Q

5

V

= 13.5 V

Ι

T

= 25 C

j

4

3

2

1

0

6

V

0

3

21

5

INH

6

V

4

V

Data Sheet Rev. 2.4 16 2001-04-04

TLE 4271-2

Inhibit Current Consumptions I
versus Temperature

14

A

µ

Ι

INH

12

10

8

6

4

2

0

-40

0 1208040

T

Ι

Ι

Ι

INH

INH

INH

AED01946

, high

, on

, off

T

j

INH

160

Inhibit Voltages V

INH

versus Temperature T

6

V

V

INH

5

4

3

2

1

V

0

40-40 0

j

INH

, off

80 120

V

INH

AED01947

, on

160

C

T

j

Switching Voltage VUD and V

LDW

T

V

= 13.5 V

Ι

V

UD

40-40 0

80 120

versus Temperature

2.4
V

V

2.0

1.6

1.2

0.8

0.4

V

0

LDW

AED01948

,

V

UDW

C

T

j

160

Data Sheet Rev. 2.4 17 2001-04-04

TLE 4271-2

Charge Current ID, I

I

Current

16

µA

I

14

12

10

versus Temperature T

DWD

I,I

D

DWC

8

V
V

6

4

I

DWD

2

0

-40

04080

and Discharge

DWC

= 13.5 V

I

= 1 V

D

120 160˚C

AED01949

T

j

Watchdog Pulse Time Tw

j

versus Temperature

80

ms

T

W

70

60

50

40

30

20

10

0

-40

T

V

= 13.5 V

Ι

C

= 100 nF

D

400

j

AED01950

80

160120

C

T

j

Data Sheet Rev. 2.4 18 2001-04-04

Package Outlines

P-TO220-7-11

(Plastic Transistor Single Outline Package)

±0.2

10

±0.2

9.9

1)

8.5

1)

0...0.3

±0.3

±0.3

17

12.95

15.65

0...0.15
6x

1.27

1)

Typical
Metal surface min. X=7.25, Y=12.3

All metal surfaces tin plated, except area of cut.

7x

A

±0.2

2.8

±0.3

8.6

0.6

-0.15

3.7

±0.3

10.2

±0.1

TLE 4271-2

4.4

±0.1

1.27

0.05

C

±0.3

3.7

2.4

M

A0.25

C

8.4

±0.4

±0.2

9.25

0.5

3.9

±0.3

1.6

±0.1

±0.4

Sorts of Packing

Package outlines for tubes, trays etc. are contained in our
Data Book “Package Information”.

Dimensions in mm

Data Sheet Rev. 2.4 19 2001-04-04

GPT09083

P-TO220-7-12

(Plastic Transistor Single Outline Package)

±0.2

±0.3

17

1)

±0.3

12.95

15.65

0...0.3

C

10

9.9

8.5

±0.2

1)

A

±0.2

2.8

±0.5

11

-0.15

3.7

±0.5

13

1.27

0.05

B

±0.1

2.4

TLE 4271-2

4.4

±0.2

9.25

0...0.15

0.6

±0.1

7x

1.27

1)

Typical

6x

M

BA0.25

C

Metal surface min. X=7.25, Y=12.3
All metal surfaces tin plated, except area of cut.

2.4

0.5

±0.1

GPT09084

Sorts of Packing

Package outlines for tubes, trays etc. are contained in our
Data Book “Package Information”.

Dimensions in mm

Data Sheet Rev. 2.4 20 2001-04-04

P-TO263-7-1

(Plastic Transistor Single Outline Package)

±0.2

10

0...0.3

1)

8.5

±0.3

1

±0.2

9.25

(15)

7x0.6

±0.1

1.27

6x

1)

Typical
Metal surface min. X=7.25, Y=6.9

All metal surfaces tin plated, except area of cut.

A

1)

7.55

0...0.15

TLE 4271-2

4.4

±0.1

1.27
B

0.05

2.4

0.1

±0.3

±0.5

2.7

4.7

0.5

±0.1

M

BA0.25

8˚ max.

0.1

B

Sorts of Packing

Package outlines for tubes, trays etc. are contained in
our Data Book “Package Information”.

SMD = Surface Mounted Device

GPT09114

Dimensions in mm

Data Sheet Rev. 2.4 21 2001-04-04

TLE 4271-2

Data Sheet Rev. 2.4 22 2001-04-04

Edition 2001-04-04
Published by Infineon Technologies AG,

St.-Martin-Strasse 53,
D-81541 München, Germany

© Infineon Technologies AG 2001.

All Rights Reserved.

Attention please!

The information herein is given to describe
certain components and shall not be consid­ered as warranted characteristics.

Terms of delivery and rights to technical
change reserved.

We hereby disclaim any and all warranties,
including but not limited to warranties of non­infringement, regarding circuits, descriptions
and charts stated herein.

Infineon Technologies is an approved CECC
manufacturer.

TLE 4271-2

Information

For further information on technology, deliv­ery terms and conditions and prices please
contact your nearest Infineon Tec hnologies
Office in Germany or our Infineon Technolo­gies Representatives worldwide (see ad­dress list).

Warnings

Due to technical requirements components
may contain dangerous substances. For in­formation on the types in question please
contact your nearest Infineon Tec hnologies
Office.

Infineon T echnologies Components may only
be used in life-support devices or systems
with the express written approval of Infineon
T echnologies, if a f ailure of such components
can reasonably be expected to cause the fail­ure of that life-support device or system, or to
affect the safety or effectiveness of that de­vice or system. Life support devices or sys­tems are intended to be implanted in the hu­man body, or t o support and/or maintain and
sustain and/or protect human life. If they fa il, it
is reasonable to assume that the health of the
user or other persons may be endangered.

Data Sheet Rev. 2.4 23 2001-04-04