TLVH431A-Q1 [TI]
LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS; 低电压可调节精密并联稳压器
| 型号： | TLVH431A-Q1 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS |
| 文件： | 总25页 (文件大小：658K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TLVH431A-Q1
TLVH431B-Q1
www.ti.com
SLVS906B –DECEMBER 2008–REVISED MARCH 2011
LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS
Check for Samples: TLVH431A-Q1, TLVH431B-Q1
1
FEATURES
•
•
•
Qualified for Automotive Applications
Low-Voltage Operation: Down to 1.24 V
Reference Voltage Tolerances at 25°C
–
–
0.5% for B Grade
1% for A Grade
•
•
Adjustable Output Voltage, VO = VREF to 18 V
Wide Operating Cathode Current Range:
100 μA to 70 mA
•
•
0.25-Ω Typical Output Impedance
–40°C to 125°C Specifications
DESCRIPTION/ORDERING INFORMATION
The TLVH431 devices are low-voltage 3-terminal adjustable voltage references, with thermal stability specified
over the automotive temperature range. Output voltage can be set to any value between VREF (1.24 V) and 18 V
with two external resistors (see Figure 2). These devices operate from a lower voltage (1.24 V) than the widely
used TL431 and TL1431 shunt-regulator references.
When used with an optocoupler, the TLVH431 devices are ideal voltage reference in isolated feedback circuits
for 3-V to 3.3-V switching-mode power supplies. They have a typical output impedance of 0.25 Ω. Active output
circuitry provides a very sharp turn-on characteristic, making the TLVH431 an excellent replacement for
low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.
ORDERING INFORMATION(1)
VREF
TOLERANCE
TA
PACKAGE(2)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
0.5%
SOT-23-5 – DBV
Reel of 3000
Reel of 3000
Reel of 3000
TLVH431BQDBVRQ1
TLVH431BQDBZRQ1
TLVH431AQDBVRQ1
VOPQ
VPIQ
–40°C to 125°C
0.5%
SOT-23-3 - DBZ
1%
SOT-23-5 – DBV
VOOQ
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
TLVH431A-Q1
TLVH431B-Q1
SLVS906B –DECEMBER 2008–REVISED MARCH 2011
www.ti.com
LOGIC BLOCK DIAGRAM
CATHODE
REF
+
−
V
REF
= 1.24 V
ANODE
EQUIVALENT SCHEMATIC
Cathode
REF
Anode
2
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TLVH431A-Q1
TLVH431B-Q1
www.ti.com
SLVS906B –DECEMBER 2008–REVISED MARCH 2011
ABSOLUTE MAXIMUM RATINGS(1)
over operating free-air temperature range (unless otherwise noted)
VKA
IK
Cathode voltage(2)
20 V
Cathode current range
–25 mA to 80 mA
–0.05 mA to 3 mA
206°C/W
Iref
θJA
TJ
Reference current range
Package thermal impedance(3) (4)
Operating virtual junction temperature
Storage temperature range
150°C
Tstg
–65°C to 150°C
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Voltage values are with respect to the anode terminal, unless otherwise noted.
(3) Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
(4) The package thermal impedance is calculated in accordance with JESD 51-7.
RECOMMENDED OPERATING CONDITIONS
MIN
VREF
0.1
MAX UNIT
VKA
IK
Cathode voltage
18
70
V
Cathode current (continuous)
Operating free-air temperature
mA
°C
TA
–40
125
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TLVH431A-Q1
TLVH431B-Q1
SLVS906B –DECEMBER 2008–REVISED MARCH 2011
www.ti.com
MAX UNIT
TLVH431A ELECTRICAL CHARACTERISTICS
at 25°C free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
TA = 25°C
1.228
1.24 1.252
TA = full range(1)
(see Figure 1)
VREF
Reference voltage
VKA = VREF, IK = 10 mA
V
1.209
1.271
VREF deviation over full temperature
range(1) (2)
VREF(dev)
VKA = VREF, IK = 10 mA (see Figure 1)
11
31
mV
DVREF
DVKA
Ratio of VREF change to cathode
voltage change
VK = VREF to 18 V, IK = 10 mA (see Figure 2)
–1.5
–2.7 mV/V
Iref
Reference terminal current
IK = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 2)
IK = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 2)
0.1
0.5
0.5
μA
μA
Iref deviation over full temperature
range(1) (2)
Iref(dev)
0.15
Minimum cathode current for
regulation
IK(min)
IK(off)
|zKA
VKA = VREF (see Figure 1)
60
0.02
0.25
100
0.1
0.4
μA
μA
Ω
Off-state cathode current
Dynamic impedance(3)
VREF = 0, VKA = 18 V (see Figure 3)
VKA = VREF, f ≤ 1 kHz, IK = 0.1 mA to 70 mA
(see Figure 1)
|
(1) Full temperature range is –40°C to 125°C.
(2) The deviation parameters VREF(dev) and Iref(dev) are defined as the differences between the maximum and minimum values obtained over
the rated temperature range. The average full-range temperature coefficient of the reference input voltage, αVREF, is defined as:
VREF(dev)
VREF (TA+25oC)
6
ǒ
Ǔ
10
ppm
ǒ Ǔ +
oC
Ť
Ť
aVREF
DTA
where ΔTA is the rated operating free-air temperature range of the device.
αVREF can be positive or negative, depending on whether minimum VREF or maximum VREF, respectively, occurs at the lower
temperature.
(3) The dynamic impedance is defined as:
∆V
KA
ŤzKAŤ +
∆I
K
When the device is oŤperating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is defined as:
∆V
∆I
R1
R2
ŤzKAŤ + ŤzKA
ǒ1 )
Ǔ
[
4
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TLVH431A-Q1
TLVH431B-Q1
www.ti.com
SLVS906B –DECEMBER 2008–REVISED MARCH 2011
TLVH431B ELECTRICAL CHARACTERISTICS
at 25°C free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
TA = 25°C
1.234
1.24 1.246
TA = full range(1)
(see Figure 1)
VREF
Reference voltage
VKA = VREF, IK = 10 mA
V
1.221
1.265
VREF deviation over full temperature
range(1) (2)
VREF(dev)
VKA = VREF, IK = 10 mA (see Figure 1)
11
31
mV
DVREF
DVKA
Ratio of VREF change to cathode
voltage change
IK = 10 mA, VK = VREF to 18 V (see Figure 2)
–1.5
–2.7 mV/V
Iref
Reference terminal current
IK = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 2)
IK = 10 mA, R1 = 10 kΩ, R2 = open (see Figure 2)
0.1
0.5
0.5
μA
μA
Iref deviation over full temperature
range(1) (2)
Iref(dev)
0.15
Minimum cathode current for
regulation
IK(min)
IK(off)
|zKA
VKA = VREF (see Figure 1)
60
0.02
0.25
100
0.1
0.4
μA
μA
Ω
Off-state cathode current
Dynamic impedance(3)
VREF = 0, VKA = 18 V (see Figure 3)
VKA = VREF, f ≤ 1 kHz, IK = 0.1 mA to 70 mA
(see Figure 1)
|
(1) Full temperature range is –40°C to 125°C.
(2) The deviation parameters VREF(dev) and Iref(dev) are defined as the differences between the maximum and minimum values obtained over
the rated temperature range. The average full-range temperature coefficient of the reference input voltage, αVREF, is defined as:
VREF(dev)
VREF (TA+25oC)
6
ǒ
Ǔ
10
ppm
ǒ Ǔ +
oC
Ť
Ť
aVREF
DTA
where ΔTA is the rated operating free-air temperature range of the device.
αVREF can be positive or negative, depending on whether minimum VREF or maximum VREF, respectively, occurs at the lower
temperature.
(3) The dynamic impedance is defined as:
∆V
KA
ŤzKAŤ +
∆I
K
When the device is oŤperating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is defined as:
∆V
∆I
R1
R2
ŤzKAŤ + ŤzKA
ǒ1 )
Ǔ
[
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TLVH431A-Q1
TLVH431B-Q1
SLVS906B –DECEMBER 2008–REVISED MARCH 2011
www.ti.com
PARAMETER MEASUREMENT INFORMATION
Operation of the device at any conditions beyond those indicated under recommended operating conditions is
not implied.
Input
V
O
I
K
V
REF
Figure 1. Test Circuit for VKA = VREF, VO = VKA = VREF
Input
R1
V
O
I
K
I
ref
R2
V
REF
Figure 2. Test Circuit for VKA > VREF, VO = VKA = VREF × (1 + R1/R2) + Iref × R1
Input
V
O
I
K(off)
Figure 3. Test Circuit for IK(off)
6
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TLVH431B-Q1
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SLVS906B –DECEMBER 2008–REVISED MARCH 2011
PARAMETER MEASUREMENT INFORMATION (continued)
REFERENCE VOLTAGE
vs
JUNCTION TEMPERATURE
1.254
1.252
1.250
1.248
I
K
= 10 mA
1.246
1.244
1.242
1.240
1.238
−50 −25
0
25
50
75
100 125 150
T − Junction Temperature − °C
J
Figure 4.
REFERENCE INPUT CURRENT
vs
JUNCTION TEMPERATURE
250
230
210
190
170
150
130
110
90
I
= 10 mA
K
R1 = 10 kΩ
R2 = Open
70
50
−50 −25
0
25
50
75
100 125 150
Figure 5.
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TLVH431A-Q1
TLVH431B-Q1
SLVS906B –DECEMBER 2008–REVISED MARCH 2011
www.ti.com
PARAMETER MEASUREMENT INFORMATION (continued)
CATHODE CURRENT
vs
CATHODE VOLTAGE
70
V
KA
= V
REF
ꢀ
T = 25°C
A
10
ꢀ
5
0
−5
−10
−15
−1
−0.5
0
0.5
1
1.5
V
KA
− Cathode Voltage − V
Figure 6.
CATHODE CURRENT
vs
CATHODE VOLTAGE
250
200
150
100
50
V
= V
REF
KA
T = 25°C
A
0
−50
−100
−150
−200
−250
−1
−0.5
0
0.5
1
1.5
V
KA
− Cathode Voltage − V
Figure 7.
8
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TLVH431A-Q1
TLVH431B-Q1
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SLVS906B –DECEMBER 2008–REVISED MARCH 2011
PARAMETER MEASUREMENT INFORMATION (continued)
OFF-STATE CATHODE CURRENT
vs
JUNCTION TEMPERATURE
4000
3500
3000
2500
2000
1500
1000
500
V
V
= 5 V
= 0
KA
REF
0
−50 −25
0
25
50
75
100 125 150
T − Junction Temperature − °C
J
Figure 8.
RATIO OF DELTA REFERENCE VOLTAGE
TO DELTA CATHODE VOLTAGE
vs
JUNCTION TEMPERATURE
0
I
= 10 mA
K
−0.1
−0.2
−0.3
−0.4
−0.5
−0.6
−0.7
−0.8
−0.9
∆V = V
to 18 V
KA
REF
−1
−50 −25
0
25
50
75
100 125 150
T − Junction Temperature − °C
J
Figure 9.
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SLVS906B –DECEMBER 2008–REVISED MARCH 2011
www.ti.com
PARAMETER MEASUREMENT INFORMATION (continued)
PERCENTAGE CHANGE IN VREF
vs
OPERATING LIFE AT 55°C
0.025
0
I
K
= 1 mA
% Change (avg)
% Change (3δ)
− 0.025
− 0.05
− 0.075
− 0.1
% Change (−3δ)
− 0.125
0
10
20
30
40
50
60
(1)
Operating Life at 55°C − kh
(1) Extrapolated from life-test data taken at 125°C; the activation energy
assumed is 0.7 eV.
Figure 10.
EQUIVALENT INPUT NOISE VOLTAGE
vs
FREQUENCY
3 V
350
300
V
I
T
A
= V
REF
= 1 mA
= 25°C
KA
1 kΩ
K
+
750 Ω
470 µF
TLE2027
2200 µF
+
+
_
TP
250
200
150
820 Ω
TLVH431
160 kΩ
160 Ω
TEST CIRCUIT FOR EQUIVALENT INPUT NOISE VOLTAGE
10
100
1 k
10 k
100 k
f – Frequency – Hz
Figure 11.
10
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SLVS906B –DECEMBER 2008–REVISED MARCH 2011
PARAMETER MEASUREMENT INFORMATION (continued)
EQUIVALENT INPUT NOISE VOLTAGE
OVER A 10-S PERIOD
10
8
f = 0.1 Hz to 10 Hz
I
K
= 1 mA
T
A
= 25°C
6
4
2
0
−2
−4
−6
−8
−10
0
2
4
6
8
10
t − Time − s
3 V
1 kΩ
0.47 µF
+
750 Ω
470 µF
2200 µF
+
TLE2027
+
TP
TLE2027
+
10 kΩ 10 kΩ
1 µF
2.2 µF
+
_
_
820 Ω
160 kΩ
0.1 µF
TLVH431
1 MΩ
CRO
33 kΩ
33 kΩ
16 Ω
TEST CIRCUIT FOR 0.1-Hz TO 10-Hz EQUIVALENT NOISE VOLTAGE
Figure 12.
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SLVS906B –DECEMBER 2008–REVISED MARCH 2011
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PARAMETER MEASUREMENT INFORMATION (continued)
SMALL-SIGNAL VOLTAGE GAIN
/PHASE MARGIN
vs
FREQUENCY
80
70
0°
I
T
= 10 mA
K
= 25°C
36°
A
Output
60
50
72°
I
K
6.8 kΩ
4.3 kΩ
180 Ω
108°
10 µF
40
144°
180°
5 V
30
20
10
GND
0
−10
−20
TEST CIRCUIT FOR VOLTAGE GAIN
AND PHASE MARGIN
100
1 k
10 k
f − Frequency − Hz
100 k
1 M
Figure 13.
REFERENCE IMPEDANCE
vs
FREQUENCY
100
10
I
= 0.1 mA to 70 mA
K
T = 25°C
A
100 Ω
Output
I
K
100 Ω
1
+
−
GND
0.1
0.01
TEST CIRCUIT FOR REFERENCE IMPEDANCE
1 k
10 k
100 k
1 M
10 M
f − Frequency − Hz
Figure 14.
12
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SLVS906B –DECEMBER 2008–REVISED MARCH 2011
PARAMETER MEASUREMENT INFORMATION (continued)
PULSE RESPONSE 1
3.5
3
R = 18 kΩ
T = 25°C
A
Input
18 kΩ
Output
2.5
2
I
k
Pulse
Generator
f = 100 kHz
50 Ω
1.5
1
Output
GND
0.5
0
TEST CIRCUIT FOR PULSE RESPONSE 1
−0.5
0
1
2
3
4
5
6
7
8
t − Time − µs
Figure 15.
PULSE RESPONSE 2
3.5
3
R = 1.8 kΩ
= 25°C
T
Input
A
1.8 kΩ
Output
2.5
2
I
K
Pulse
Generator
f = 100 kHz
50 Ω
1.5
1
Output
GND
0.5
0
TEST CIRCUIT FOR PULSE RESPONSE 2
−0.5
0
1
2
3
4
5
6
7
8
t − Time − µs
Figure 16.
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SLVS906B –DECEMBER 2008–REVISED MARCH 2011
www.ti.com
PARAMETER MEASUREMENT INFORMATION (continued)
30 kW
IK
100 µF
50 W
I2
CL
I1
Figure 17. Phase Margin Test Circuit
IK
Figure 18.
14
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SLVS906B –DECEMBER 2008–REVISED MARCH 2011
PARAMETER MEASUREMENT INFORMATION (continued)
IK
Figure 19.
IK
Figure 20.
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SLVS906B –DECEMBER 2008–REVISED MARCH 2011
www.ti.com
APPLICATION INFORMATION
V
120 V
I
−
+
P
V
O
3.3 V
P
P
Gate Drive
V
CC
Controller
V
FB
TLVH431
Current
Sense
GND
P
P
P
P
Figure 21. Flyback With Isolation Using TLVH431 as Voltage Reference and Error Amplifier
Figure 21 shows the TLVH431 used in a 3.3-V isolated flyback supply. Output voltage VO can be as low as
reference voltage VREF (1.24 V). The output of the regulator plus the forward voltage drop of the optocoupler LED
(1.24 + 1.4 = 2.64 V) determine the minimum voltage that can be regulated in an isolated supply configuration.
Regulated voltage as low as 2.7 Vdc is possible in the topology shown in Figure 21.
16
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PACKAGE OPTION ADDENDUM
www.ti.com
7-May-2011
PACKAGING INFORMATION
Status (1)
Eco Plan (2)
MSL Peak Temp (3)
Samples
Orderable Device
Package Type Package
Drawing
Pins
Package Qty
Lead/
Ball Finish
(Requires Login)
TLVH431AQDBVRQ1
TLVH431BQDBVRQ1
TLVH431BQDBZRQ1
ACTIVE
ACTIVE
ACTIVE
SOT-23
SOT-23
SOT-23
DBV
DBV
DBZ
5
5
3
3000
3000
3000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
CU NIPDAU Level-1-260C-UNLIM
Green (RoHS
& no Sb/Br)
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF TLVH431A-Q1, TLVH431B-Q1 :
Catalog: TLVH431A, TLVH431B
•
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
7-May-2011
NOTE: Qualified Version Definitions:
Catalog - TI's standard catalog product
•
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
1-Apr-2011
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
B0
K0
P1
W
Pin1
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant
(mm) W1 (mm)
TLVH431BQDBZRQ1
SOT-23
DBZ
3
3000
179.0
8.4
3.15
2.95
1.22
4.0
8.0
Q3
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
1-Apr-2011
*All dimensions are nominal
Device
Package Type Package Drawing Pins
SOT-23 DBZ
SPQ
Length (mm) Width (mm) Height (mm)
203.0 203.0 35.0
TLVH431BQDBZRQ1
3
3000
Pack Materials-Page 2
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