SP001166632 [INFINEON]
Fixed Positive LDO Regulator,;
| 型号： | SP001166632 |
| 厂家： | 
Infineon |
| 描述： | Fixed Positive LDO Regulator, 输出元件 调节器 |
| 文件： | 总17页 (文件大小：322K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
5-V Low Drop Fixed Voltage Regulator
TLE 4268
Features
• Output voltage tolerance ≤ ±2%
• Very low current consumption
• Low-drop voltage
• Watchdog
• Settable reset threshold
• Overtemperature protection
• Reverse polarity protection
• Short-circuit proof
• Suitable for use in automotive electronics
• Wide temperature range
• Green Product (RoHS compliant)
• AEC Qualified
Functional Description
This device is a 5-V low-drop fixed-voltage regulator. The
maximum input voltage is 45 V. It can deliver an output
current of at least 180 mA. The IC is short-circuit proof
and features temperature protection that disables the
circuit in the event of impermissibly high temperatures. The watchdog function is
disabled as a function of the load, so that a controller is not interrupted during sleep
mode by a watchdog reset.
Application Description
The IC regulates an input voltage VI in the range 5.5 V < VI < 45 V to VQ,nom = 5.0 V. In
the event of an output voltage VQ < VRT, a reset signal is generated. The wiring of the
reset switching threshold input enables the value of VRT to be reduced. The reset delay
time can be adjusted using an external capacitor. The integrated watchdog monitors the
connected active controller. If there is no rising edge at the watchdog input, the reset
Type
Package
TLE 4268 GS
TLE 4268 G
PG-DSO-8-16
PG-DSO-20-35
Data Sheet
1
Rev. 1.5, 2007-03-20
TLE 4268
output is set to low. The reset delay capacitor provides a wide adjustment range for the
pulse repetition time. The watchdog function is only activated if the load exceeds 8 mA.
This ensures that a microcontroller is not activated during power-down and the current
drain is not increased. The IC is protected against overload and overtemperature.
PG-DSO-8-16
Ι
N.C.
RO
1
2
3
4
8
7
6
5
Q
W
RADJ
D
GND
AEP01954
Figure 1
Pin Configuration (top view)
Pin Definitions and Functions
Table 1
Pin
1
Symbol
I
Function
Input voltage
2
N.C.
RO
Not connected
Reset output
3
4
GND
D
Ground
5
Reset delay
6
RADJI
W
Reset switching threshold
Watchdog input
5 V output voltage
7
8
Q
Data Sheet
2
Rev. 1.5, 2007-03-20
TLE 4268
PG-DSO-20-35
N.C.
N.C.
RO
1
2
20
N.C.
N.C.
Ι
19
18
17
16
15
14
13
12
11
3
GND
GND
GND
GND
N.C.
D
4
GND
GND
GND
GND
N.C.
Q
5
6
7
8
9
RADJ
10
W
AEP01540
Figure 2
Pin Configuration (top view)
Table 2
Pin
Pin Definitions and Functions
Symbol Function
1, 2, 8, 13, N.C.
19, 20
Not connected.
3
RO
Reset output; the open collector output is connected to the
5-V output via an integrated resistor of 30 kΩ.
4 … 7,
14 … 17
GND
D
Ground
9
Reset delay; connect a capacitor to ground for delay time
adjustment.
10
RADJ
Reset switching threshold; for setting the switching threshold,
output to ground with voltage divider. If this input is connected
to ground, the reset is triggered at an output voltage of 4.5 V.
11
12
18
W
Q
I
Watchdog input; positive-edge-triggered input for monitoring a
microcontroller.
5-V output voltage; block to ground with 22 µF capacitor,
ESR < 3 Ω.
Input voltage; block to ground directly on the IC with ceramic
capacitor.
Data Sheet
3
Rev. 1.5, 2007-03-20
TLE 4268
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 the series transistor via a buffer. Saturation control as a function of the load
current prevents any over-saturation of the power element. If the externally scaled down
output voltage at the reset threshold input drops below 1.35 V, the external reset delay
capacitor is discharged by the reset generator. If the voltage on the capacitor reaches
the lower threshold VDRL, a reset signal is generated on the reset output and not
cancelled again until the upper threshold voltage is exceeded. If the reset threshold input
is connected to GND, reset is triggered at an output voltage of 4.5 V. A connected
microcontroller is monitored by the watchdog logic. If pulses are missing, the rest output
is set to low. The pulse sequence time can be set within a wide range with the reset delay
capacitor. The IC also incorporates internal circuits for protection against:
• Overload
• Overtemperature
• Reverse polarity
18
12
Input
Output
Temperature
Sensor
Protection
Circuit
Reset
Output
3
10
9
Reset
Generator
Reset
Switching
Threshold
Control
Amplifier
Reset
Delay
Bandgap
Reference
Adjustment
Watchdog
4-7, 14-17
GND
11
Watchdog
Input
AEB01539
Figure 3
Block Diagram TLE 4268 G (PG-DSO-20-35)
Data Sheet
4
Rev. 1.5, 2007-03-20
TLE 4268
Table 3
Absolute Maximum Ratings
Parameter
Symbol
Limit Values
Unit
Notes
Min.
Max.
Input I
Input voltage
Input current
VI
II
-30
–
45
–
V
–
–
Internally limited
Reset Output RO
Voltage
Current
VR
IR
-0.3
–
7
–
V
–
–
Internally limited
Reset Delay D
Voltage
Current
VD
ID
-0.3
–
7
–
V
–
–
Internally limited
Watchdog W
Watchdog input
VW
-0.3
-0.3
7
7
V
V
–
–
Reset Switching Threshold RADJ
Reset threshold
VRADJ
Output Q
Output voltage
Output current
VQ
IQ
-0.3
–
7
–
V
–
–
Internally limited
Ground GND
Current
IGND
-100
50
mA
–
Temperatures
Junction temperature
Storage temperature
Tj
TS
-40
-50
150
150
°C
°C
–
–
Data Sheet
5
Rev. 1.5, 2007-03-20
TLE 4268
Table 4
Operating Range
Symbol
Parameter
Limit Values
Unit Notes
Min.
Max.
45
Input voltage
VI
Tj
–
V
–
–
Junction temperature
Thermal Resistance
-40
150
°C
Junction ambient (soldered) Rthj-a
–
–
185
100
K/W PG-DSO-8-161)
K/W PG-DSO-20-351)
Rthj-a
Junction pin
Rthj-pin
Rthj-pin
–
–
72
23
K/W PG-DSO-8-162)
K/W PG-DSO-20-353)
1) Package mounted on PCB 80 × 80 × 1.5 mm3; 35µ Cu; 5µ Sn; Footprint only; zero airflow.
2) Measured to pin 2.
3) Measured to pin 5.
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, operation at the maximum permitted
ratings could affect the reliability of the device.
Data Sheet
6
Rev. 1.5, 2007-03-20
TLE 4268
Table 5
Characteristics
VI = 13.5 V; -40 °C ≤ Tj ≤ 125 °C (unless otherwise specified)
Parameter
Symbol
Limit Values
Unit Test Condition
Min.
Typ.
Max.
Output voltage
VQ
4.90
5.00
5.10
V
5 mA ≤ IQ ≤ 150 mA;
6 V ≤ VI ≤ 28 V
Output current limiting IQ
180
–
250
300
–
mA
–
Current consumption Iq
Iq = II - IQ
450
µA
IQ = 0 mA
Current consumption Iq
Iq = II - IQ
–
13
20
mA IQ = 150 mA
V
IQ = 150 mA1)
Drop voltage
VDR
–
–
–
0.25
10
0.50
30
Load regulation
Line regulation
∆VQ,Lo
∆VQ,Li
mV IQ = 5 to 150 mA
10
30
mV VI = 6 to 28 V
IQ = 150 mA
Reset Generator
Reset threshold
VQ,rt
4.2
4.5
4.8
V
V
–
–
Reset adjust
threshold
VRADJ
1.28
1.35
1.45
Reset low voltage
Saturation voltage
Charging current
VRO,l
VD
–
0.2
30
0.5
100
18
V
1 mA external
–
mV VQ < VRT
ID,c
5
12
µA
VD = 1.0 V
Upper reset timing
threshold
VDU
1.4
1.8
2.2
V
–
Reset delay time
Reset reaction time
Pull-up
trd
10
–
15
2
25
–
ms
µs
kΩ
V
CD = 100 nF
CD = 100 nF
with resp. to VQ
–
trr
RRO
VDRL
18
0.2
30
0.4
46
0.55
Lower reset timing
threshold
Data Sheet
7
Rev. 1.5, 2007-03-20
TLE 4268
Table 5
Characteristics (cont’d)
VI = 13.5 V; -40 °C ≤ Tj ≤ 125 °C (unless otherwise specified)
Parameter
Symbol
Limit Values
Unit Test Condition
Min.
Typ.
Max.
Watchdog
Discharge current
Charging current
ID,d
ID,c
VDU
1.5
5
3.5
12
5.2
18
µA
µA
V
VD = 1.0 V
VD = 1.0 V
–
Upper timing
threshold
1.4
1.8
2.2
Lower timing
threshold
VDWL
TWP
0.2
0.4
0.55
V
–
Watchdog period
30
25
2
55
40
8
75
60
15
–
ms
ms
mA
CD = 100 nF
Watchdog trigger time TWT
CD = 100 nF
Activating current
Slew rate
IQ
Activates watchdog
dVW/dt
5
–
V/µs from 20% up to
2)
80% VQ
1) Drop voltage = VI - VQ (measured when the output voltage has dropped 100 mV from the nominal value
obtained at 13.5 V input)
2) Watchdog pulse recognition tested with 10 kHz max. pulse frequency
Note: The reset output is low in range from VQ = 1 V to VQ,rt.
Data Sheet
8
Rev. 1.5, 2007-03-20
TLE 4268
Ι Q
Ι Ι
Ι
Q
1000 µF
470 nF
22 µF
TLE 4268G
Ι R
VΙ
VQ
W
RO
D
GND
RADJ
VR
VW
Ι dis
Ι d
C D
Ι M
VRES
VD
100 nF
AES01541
VDr
= VΙ-VQ Outside the control range
Figure 4
Test Circuit
Data Sheet
9
Rev. 1.5, 2007-03-20
TLE 4268
Reset Timing
The power-on reset delay time is defined by the charging time of an external capacitor
CD which can be calculated as follows:
CD = (∆trd × ID,c)/∆V
(1)
Definitions:
• CD = delay capacitor
•
∆trd = delay time
• ID,c = charge current, typical 12 µA
∆V = VDU, typical 1.8 V
• VDU = upper delay switching threshold at CD for reset delay time
•
The reset reaction time trr is the time it takes the voltage regulator to set the reset out
LOW after the output voltage has dropped below the reset threshold. It is typically 1 µs
for delay capacitor of 47 nF. For other values for CD the reaction time can be estimated
using the following equation:
trr ≈ 20 s/F × CD
(2)
VΙ
t
t
< trr
VQ
VQ, rt
dV
ΙD,c
=
VD
VDU
dt
CD
VDRL
trr
t
t
trd
VRO
Power-on-Reset
Thermal
Shutdown
Voltage Dip
at Input
Undervoltage
Secondary
Spike
Overload
at Output
AED03010
Figure 5
Timing (Watchdog disabled)
Data Sheet
10
Rev. 1.5, 2007-03-20
TLE 4268
VW
Ι
t
t
t
t
t
V
Ι
VQ
TWP
VD
TWT
VDU
VDWL
VWO
tWD, L
(VDU -VDWL
)
(VDU -VDWL ) (Ι D, c
+
Ι D, d
)
(VDU -VDWL )
TWT
=
CD
;
TWP
=
CD
;
tWD, L
=
CD
Ι D, d
Ι D, c
x
Ι D, d
Ι D, c
AED03011_68
Figure 6
Timing of the Watchdog Function
Data Sheet
11
Rev. 1.5, 2007-03-20
TLE 4268
Drop Voltage VDR versus
Output Current IQ
Current Consumption Iq
versus Output Current IQ
AED01544
AED01545
mV
16
Vdr
Iq mA
700
14
12
10
600
500
400
V
= 13.5 V
TIj = 25 ˚C
8
Tj = 125
C
300
200
100
0
6
4
2
0
Tj = 25
C
0
50
100
150
200
250
mA
0
50
100
150 mA 200
Ι Q
IQ
Current Consumption Iq
versus Input Voltage VI
Output Voltage versus
Input Voltage VI
AED01546
AED01547
24
mA
Iq
VQ
mA
20
T
j = 25 ˚C
10
8
16
12
8
R
L= 33
Ω
6
R L= 33
Ω
4
2
0
R
R
L= 50
Ω
4
L= 100
20
Ω
0
0
10
30
40 V 50
0
2
4
6
8
V
VI
VΙ
Data Sheet
12
Rev. 1.5, 2007-03-20
TLE 4268
Charge Current ID,c and Discharge
Current ID,d versus Temperature Tj
Timing Threshold VDU, VDWL, VDRL
versus Temperature Tj
AED3100
AED03101
16
V
µ
A
Ι
VD
VΙ
= 13.5 V
14
12
10
8
2.8
V
D = 1.0 V
VΙ
= 13.5 V
2.4
2.0
1.6
1.2
0.8
0.4
0
ΙD, c
VDU
6
4
ΙD, d
VDWL, VDRL
2
0
-40
0
40
80
120
Tj
C
-40
0
40
80
120
C
Tj
Output Voltage VQ versus
Temperature Tj
Output Current IQ versus
Input Voltage VI
AED03102
AED01551
V
300
IQ
VQ
mA
T
j = 25 ˚C
5.1
250
VΙ
= 13.5 V
5.0
4.9
4.8
4.7
4.6
200
150
100
50
0
-40
0
40
80
120
Tj
V
0
10
20
30
40 V 50
VI
Data Sheet
13
Rev. 1.5, 2007-03-20
TLE 4268
Package Outlines
0.35 x 45°
1)
4-0.2
1.27
B
0.1
±0.25
0.64
+0.1
-0.06
0.41
M
0.2 A B 8x
±0.2
6
8
1
5
Index
Marking
4
A
1)
5-0.2
1) Does not include plastic or metal protrusion of 0.15 max. per side
2) Lead width can be 0.61 max. in dambar area
GPS01229
Figure 7
PG-DSO-8-16 (Plastic Dual Small Outline)
Green Product (RoHS compliant)
To meet the world-wide customer requirements for environmentally friendly products
and to be compliant with government regulations the device is available as a green
product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable
for Pb-free soldering according to IPC/JEDEC J-STD-020).
You can find all of our packages, sorts of packing and others in our
Infineon Internet Page “Products”: http://www.infineon.com/products.
Dimensions in mm
SMD = Surface Mounted Device
Data Sheet
14
Rev. 1.5, 2007-03-20
TLE 4268
0.35 x 45˚
1)
7.6-0.2
0.4+0.8
1.27
2)
0.1 20x
0.35+0.15
10.3
±0.3
0.2 20x
20
11
1
10
1)
12.8-0.2
Index Marking
1) Does not include plastic or metal protrusion of 0.15 max. per side
2) Does not include dambar protrusion of 0.05 max. per side
GPS05094
Figure 8
PG-DSO-20-35 (Plastic Dual Small Outline)
Green Product (RoHS compliant)
To meet the world-wide customer requirements for environmentally friendly products
and to be compliant with government regulations the device is available as a green
product. Green products are RoHS-Compliant (i.e Pb-free finish on leads and suitable
for Pb-free soldering according to IPC/JEDEC J-STD-020).
You can find all of our packages, sorts of packing and others in our
Infineon Internet Page “Products”: http://www.infineon.com/products.
Dimensions in mm
SMD = Surface Mounted Device
Data Sheet
15
Rev. 1.5, 2007-03-20
TLE 4268
Version
Date
Changes
Rev. 1.5
2007-03-20 Initial version of RoHS-compliant derivate of TLE 4268
Page 1: AEC certified statement added
Page 1 and Page 14 ff: RoHS compliance statement and
Green product feature added
Page 1 and Page 14 ff: Package changed to RoHS
compliant version
Legal Disclaimer updated
Data Sheet
16
Rev. 1.5, 2007-03-20
Edition 2007-03-20
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2007 Infineon Technologies AG
All Rights Reserved.
Legal Disclaimer
The information given in this document shall in no event be regarded as a guarantee of conditions or
characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any
information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties
and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights
of any third party.
Information
For further information on technology, delivery terms and conditions and prices, please contact the nearest
Infineon Technologies Office (www.infineon.com).
Warnings
Due to technical requirements, components may contain dangerous substances. For information on the types in
question, please contact the nearest Infineon Technologies Office.
Infineon Technologies components may be used in life-support devices or systems only with the express written
approval of Infineon Technologies, if a failure 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 to support and/or maintain and sustain
and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may
be endangered.
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