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5-V Low-Drop Fixed Voltage Regulator
TLE 4271
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
P-TO220-7-11 (P-TO220-7-1)
Type TLE 4271
Ordering Code Q67000-A9210-A901
Package P-TO220-7-11 P-TO220-7-12 P-TO263-7-1 P-TO220-7-1 P-TO220-7-2 P-TO220-7-8 P-TO220-7-12 (P-TO220-7-2)
TLE 4271 S Q67000-A9244-A901 TLE 4271 G Q67006-A9195-A901 w TLE 4271 Q67000-A9210-C801 w TLE 4271 S Q67000-A9244-A801 w TLE 4271 G Q67006-A9195-A801 w Not for new design
P-TO263-7-1 (P-TO220-7-8) Functional Description This 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 unpermissibly high temperatures.
Semiconductor Group 1 1998-11-01
TLE 4271
Pin Configuration (top view)
P-TO220-7-11 (P-TO220-7-1)
P-TO220-7-12 (P-TO220-7-2)
P-TO263-7-1 (P-TO220-7-8)
1
7
1 7
1 7
RO D Q INH GND W
AEP01938
RO D Q INH GND W
AEP01939
RO D Q INH GND W
AEP02017
Figure 1 Pin Definitions and Functions Pin 1 2 3 4 5 6 7 Symbol I INH RO GND D W Q Function Input; block to ground directly on the IC with ceramic capacitor. Inhibit Reset Output; the open collector output is connected to the 5 V output via an integrated resistor of 30 k. Ground Reset Delay; connect a capacitor to ground for delay time adjustment. Watchdog Input 5-V Output; block to ground with 22 F capacitor, ESR < 3 .
Semiconductor Group
2
1998-11-01
TLE 4271
Application Description The IC regulates an input voltage in the range of 5.5 V < VI < 36 V to VQnom = 5.0 V. Up 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. The IC can be switched off via the inhibit input, which causes the quiescent current to drop below 50 A. A reset signal is generated for an output voltage of VQ < 4.5 V. The watchdog circuit monitors a connected controller. If there is no positivegoing 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 permitted watchdog-pulse period can be set externally with a capacitor. Design Notes for External Components An input capacitor CI is necessary for compensation of line influences. The resonant circuit consisting of lead inductance and input capacitance can be damped by a resistor of approx. 1 in series with CI. An output capacitor CQ is necessary for the stability of the regulating circuit. Stability is guaranteed at values of CQ 22 F and an ESR of < 3 . 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. If the output voltage decreases below 4.5 V, an external capacitor CD on pin 4 (D) will be discharged by the reset generator. If the voltage on this capacitor VD drops below VDRL, a reset signal is generated on pin 2 (RO), i.e. reset output is set low. If the output voltage rises above 4.5 V, CD will be charged with constant current. After the power-on-reset time VD reaches VDU and the reset output will be set high again. The value of the power-onreset time can be set within a wide range depending on the capacity of CD. The value of the pull-up resistor at reset output is typically 30 k. After VD has reached the voltage VDU and reset was set to high, the watchdog circuit is enabled and discharges CD with a constant current. If there is no positive-going edge observed at watchdog input, CD will be discharged down to VDWL. Then reset will be set low and the watchdog circuit will be disabled. CD will be charged with the current as at power-on reset until VD reaches VDU and reset will be set high again. If a watchdog pulse will be observed before CD is discharged down to VDWL, the watchdog circuit will be enabled and CD will be charged too, but reset will not be set low. After VD has reached VDU, the periodical behavior starts again.
Semiconductor Group
3
1998-11-01
TLE 4271
The IC also incorporates a number of internal circuits for protection against: * * * * Overload Overvoltage Overtemperature Reverse polarity
Temperature Sensor
Saturation Control and Protection Circuit 7
1 Control Amplifier Adjustment Bandgap Reference + Reset Generator
Q
Buffer
3
R
5
D
Watchdog 2 INH 4 GND
6
W
AEB01940
Figure 2 Block Diagram
Semiconductor Group
4
1998-11-01
TLE 4271
Absolute Maximum Ratings Tj = - 40 to 150 C Parameter Symbol min. Input Voltage Voltage Current Inhibit Voltage Voltage Current Reset Output Voltage Current Reset Delay Voltage Current Watchdog Voltage Current Output Voltage Current Ground Current Temperatures Junction temperature Storage temperature
Semiconductor Group
Limit Values max.
Unit
Notes
VI VI II
- 42 - -
42 65 -
V V mA
-
t 400 ms
internally limited
VE VE IE
- 42 - -
42 65 -
V V mA
-
t 400 ms
internally limited
VR IR
- 0.3 -
42 -
V mA
- internally limited
VD ID
- 0.3 -5
7 5
V mA
- -
VW IW
- 0.3 -5
7 5
V mA
- -
VQ IQ
- 1.0 -5
16 -
V mA
- internally limited
IGND
- 0.5
-
A
-
Tj Tstg
- - 50
5
150 150
C C
- -
1998-11-01
TLE 4271
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. Operating Range Parameter Input voltage Junction temperature Thermal Resistance Junction ambient Junction case Symbol Limit Values min. max. 40 150 V C - - 6 - 40 Unit Notes
VI Tj
Rthja Rthjc Zthjc
- - - -
65 70 3 6 2
K/W K/W K/W K/W K/W
- SMD version - P-TO220-7-8 t < 1 ms
Semiconductor Group
6
1998-11-01
TLE 4271
Characteristics VI = 13.5 V; - 40 C Tj = 125 C (unless otherwise specified) Parameter Output voltage Output voltage Output current limiting Current consumption Iq = II Current consumption Iq = II Current consumption Iq = II - IQ Current consumption Iq = II - IQ Current consumption Iq = II - IQ Drop voltage Load regulation Supply voltage regulation Power supply Ripple rejection
1)
Symbol min.
Limit Values typ. 5.00 5.00 800 - max. 5.10 5.10 - 50 4.90 4.90 650 -
Unit V V mA A
Test Condition 5 mA IQ 550 mA; 6 V VI 26 V 26 V VI 36 V; IQ 300 mA; VQ = 0 V
VQ VQ IQmax Iq
Ve = 0 V; IQ = 0 mA
Iq
-
800
-
A
Ve = 5 V; IQ = 0 mA
Iq
-
1
1.5
mA
IQ = 5 mA
Iq
-
55
75
mA
IQ = 550 mA
Iq
-
70
90
mA
IQ = 550 mA; VI = 5 V
Vdr VQ VQ PSRR
- - - -
350 25 12 54
700 50 25 -
mV mV mV dB
IQ = 550 mA1) IQ = 5 to 550 mA; VI = 6 V VI = 6 to 26 V IQ = 5 mA fr = 100 Hz; Vr = 0.5 VSS
Drop voltage = VI - VQ (measured when the output voltage has dropped 100 mV from the nominal value obtained at 13.5 V input)
Semiconductor Group
7
1998-11-01
TLE 4271
Characteristics (cont'd) VI = 13.5 V; - 40 C Tj = 125 C (unless otherwise specified) Parameter Symbol min. Reset Generator Switching threshold Reset high voltage Reset low voltage Reset low voltage Reset pull-up Lower reset timing threshold Charge current Upper timing threshold Delay time Reset reaction time Limit Values typ. max. Unit Test Condition
VRT VROH VROL VROL R VDRL Id VDU td tRR
4.5 4.5 - - 18 0.2 8 1.4 8 -
4.65 - 60 200 30 0.45 14 1.8 13 -
4.8 - - 400 46 0.8 25 2.3 18 3
V V mV mV K V A V ms s
- -
Rintern = 30 k2); 1.0 V VQ 4.5 V IR = 3 mA, VQ = 4.4 V
internally connection to Q3
VQ < VRT VD = 1.0 V
-
CD = 100 nF CD = 100 nF
Overvoltage Protection Turn-Off voltage Inhibit Inhibit ON voltage Inhibit OFF voltage Inhibit current Watchdog Upper timing threshold Lower watchdog timing threshold Discharge current
Semiconductor Group
VI, ov
40
44
46
V
-
VINH VINH IINH
1.0 0.8 8
2.0 1.3 12
3.5 3.3 25
V V A
VQ = high (> 4.5 V) VQ = low (< 0.8 V) VINH = 5 V
VDU VDWL Idis
1.4 0.2 1.5
1.8 0.45 2.7
8
2.3 0.8 3.5
V V A
- -
VD = 1 V
1998-11-01
TLE 4271
Characteristics (cont'd) VI = 13.5 V; - 40 C Tj = 125 C (unless otherwise specified) Parameter Charge current Watchdog period Watchdog trigger time Watchdog pulse slew rate
2)
Symbol min.
Limit Values typ. 14 55 45 - max. 25 75 66 - 8 40 30 5
Unit A ms ms V/s
Test Condition
Id tw twt VW
VD = 1 V CD = 100 nF CD = 100 nF
see diagram from 20% to 80% VQ
Reset peak is always lower than 1.0 V.
Semiconductor Group
9
1998-11-01
TLE 4271
1000 F 470 nF
1
7
Q
22 F
TLE 4271 2
3R
5
V V INH VD
D
CD
6
4
VQ VR
GND
VW
AES01941
Figure 3 Test Circuit
Input 470 nF Input e.g. KL 15 Reset to MC
1
7
5 V-Output
2
TLE 4271
5 4 6 100 nF
AES01942
3
22 F
Figure 4 Application Circuit
Semiconductor Group 10 1998-11-01
TLE 4271
V
< t RR
VQ
V RT
dV d = dt C d
V D V DU V DRL td VR t RR
Power-on-Reset
Thermal Shutdown
Voltage Drop Undervoltage at Input
Secondary Spike
Load Bounce
AES01927
Figure 5 Time Response
VW
V
VQ t wt V D V DU V DWL VR t wr tw
tw = t wt =
(V DU - VDWL ) ( dis + d ) CD d x dis
t wr =
V DU - V DWL C D = (Watchdog Reset Time) d
V DU - V DWL
dis
CD
AES01943
Figure 6 Time Response, Watchdog Behavior
Semiconductor Group 11 1998-11-01
TLE 4271
Output Voltage VQ versus Temperature Tj
5.20
AED01928
Output Voltage VQ versus Input Voltage VI (VI = Ve)
12
AED01929
VQ
V 5.10
VQ V = 13.5 V
V 10
5.00
8
4.90
6
R L = 25
4.80
4
4.70
2
4.60 -40
0
40
80
120 C 160 Tj
0
0
2
4
6
8 V 10 V
Output Current IQ versus Temperature Tj
1200
AED01930
Output Current IQ versus Input Voltage VI
1.2
AED01931
Q
mA 1000
Q
A 1.0
T j = 25 C
800
0.8
600
0.6
T j = 125 C
400
0.4
200
0.2
0 -40
0
40
80
120 C 160 Tj
0
0
10
20
30
40 V 50 V
Semiconductor Group
12
1998-11-01
TLE 4271
Current Consumption Iq versus Output Current IQ
6
AED01932
Current Consumption Iq versus Output Current IQ
80 mA q 70 60
AED01933
q
mA 5
4
50
3
40
V = 13.5 V
V = 13.5 V
2
30 20
1
10
0 0 20 40 60 80 mA Q 120
0
0
100
200
300
400
mA Q
600
Current Consumption Iq versus Input Voltage VI
120
AED01934
Drop Voltage Vdr versus Output Current IQ
800 mV V Dr 700 600
AED01935
q
mA 100
80
500
T j = 125 C
60
400
R L = 10
300 =25 C
40
R L = 20
20
R L = 50
200 100 0
Tj
0
0
10
20
30
40 V 50 V
0
200
400
600
mA Q
1000
Semiconductor Group
13
1998-11-01
TLE 4271
Inhibit Current IE versus Inhibit Voltage VE
12
AED01944
Output Voltage VQ versus Inhibit Voltage VE
6
AED01945
E
A
10
e, high
VQ
V 5
e, on
8
4
V = 13.5 V T j = 25 C
6
3
V = 13.5 V T j = 25 C
2
4
2
e, off
0 1 2 3 4 5V 6 VE
1
0
0
0
1
2
3
4
5V 6 VE
Inhibit Current Consumptions Ie versus Temperature Tj
14
AED01946
Inhibit Voltages Ve versus Temperature Tj
6
AED01947
e
A 12
Ve
V 5
e, high
10
4
8
e, on
6
3
V e, on
2
4 2
1
e, off
0 -40 0 40 80 120 Tj 160
V e, off
0 -40 0 40 80 120 C 160 Tj
Semiconductor Group
14
1998-11-01
TLE 4271
Switching Voltage VDU and VDWL versus Temperature Tj
2.4 V
AED01948
Charge Current Id and Discharge Current Idis versus Temperature Tj
16 A 14
AED01949
V
2.0
V = 13.5 V
d
V DU
12 10
1.6
1.2
8 6
V = 13.5 V VD = 1 V
0.8
dis
4
0.4
V DWL
0 -40 0 40 80 120 C 160 Tj
2 8 -40
0
40
80
120 C 160 Tj
Watchdog Pulse Time Tw versus Temperature Tj
80 ms T W 70 60 50 40 30 20 10 0 -40
AED01950
V = 13.5 V C D = 100 nF
0
40
80
120 C 160 Tj
Semiconductor Group
15
1998-11-01
TLE 4271
Package Outlines P-TO220-7-1 (Plastic Transistor Single Outline Package)
10 +0.4 10.2 -0.2 3.75
+0.1
4.6 -0.2 1 x 45 1.27 +0.1
2.8
19.5 max
16 0.4
8.8 -0.2
2.6 0.4 +0.1 8.4 0.4
8.6 0.3
15.4 0.3
GPT05108
1 1.27
7 0.6
+0.1 1)
0.6 M 7x
4.5 0.4
1) 0.75 -0.15 at dam bar (max 1.8 from body) 1) 0.75 -0.15 im Dichtstegbereich (max 1.8 vom Korper)
Sorts of Packing Package outlines for tubes, trays etc. are contained in our Data Book "Package Information". Semiconductor Group 16
10.2 0.3
Dimensions in mm 1998-11-01
TLE 4271
P-TO220-7-2 (Plastic Transistor Single Outline Package)
10 +0.4 10.2 -0.2 3.75
+0.1
4.6 -0.2 1 x 45 1.27
+0.1
2.8
11
1 1.27
7
13
0.4 +0.1 0.6 +0.1 1) 2.6
GPT05257
0.6 M 7x 1) 0.75 -0.15 at dam bar (max 1.8 from body) 1) 0.75 -0.15 im Dichtstegbereich (max 1.8 vom Korper)
Sorts of Packing Package outlines for tubes, trays etc. are contained in our Data Book "Package Information". Semiconductor Group 17
8.8 -0.2
15.4
Dimensions in mm 1998-11-01
TLE 4271
P-TO220-7-11 (Plastic Transistor Single Outline Package)
10 0.2 9.8 0.15 8.5 1) 3.7 -0.15 4.4 1.27 0.1 A
15.65 0.3
1)
17 0.3
2.8 0.2
13.4
0.05
8.6 0.3
10.2 0.3
C 0...0.15 1.27
3.70.3
9.25 0.2 0.5 0.1 3.9 0.4 8.4 0.4
GPT09083
7x 0.6 0.1 0.25
M
2.4
AC
1)
Typical All metal surfaces tin plated, except area of cut.
Sorts of Packing Package outlines for tubes, trays etc. are contained in our Data Book "Package Information". Semiconductor Group 18
Dimensions in mm 1998-11-01
TLE 4271
P-TO220-7-12 (Plastic Transistor Single Outline Package)
10 0.2 9.8 0.15 8.5 1) 3.7 -0.15
A B 4.4 1.27 0.1
170.3 15.65 0.3
1)
2.8 0.2
13.4
0.05
110.5
C 0...0.15 1.27
13 0.5
7x 0.6 0.1 0.25
M
0.5 0.1 2.4 ABC
1)
Typical All metal surfaces tin plated, except area of cut.
GPT09084
Sorts of Packing Package outlines for tubes, trays etc. are contained in our Data Book "Package Information". Semiconductor Group 19
9.25 0.2
Dimensions in mm 1998-11-01
TLE 4271
P-TO263-7-1 (Plastic Transistor Single Outline Package)
10 0.2 9.8 0.15 A
10.3
4.4 1.27 0.1 B 0.1 2.4
2.7 0.3
8.5 1)
0.05
9.25 0.2
(15)
8 1)
0...0.15 7x0.60.1 6x1.27
4.7 0.5
0.5 0.1
8 max.
1)
Typical All metal surfaces tin plated, except area of cut.
P-TO220-7-8 (Plastic Transistor Single Outline Package)
1.27 10.2 8.0 1)
3.5
4.6 0.2 2.6
10.1
0.6 1.27 6 x 1.27 = 7.62
0.4
GPT05874
1) shear and punch direction burr free surface
Sorts of Packing Package outlines for tubes, trays etc. are contained in our Data Book "Package Information". SMD = Surface Mounted Device Semiconductor Group 20
1.5
8.8
Dimensions in mm 1998-11-01
GPT09114
0.25
M
AB
0.1

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