View TL431_4851519.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Description
The TL431 and TL432 are three terminal adjustable shunt regulators offering excellent temperature stability and output current handling capability up to 100mA. The output voltage may be set to any chosen voltage between 2.5 and 36 volts by selection of two external divider resistors. The devices can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. Diodes' TL431 has the same electrical specifications as the industry standard `431 and is available in 2 grades with initial tolerances of 1% and 0.5% for the A and B grades respectively.
Pin Assignments
TL431 (Top View)
3 ANODE 1 2 CATHODE REF
NEW PRODUCT
SOT23
NC NC 1 2 3
(Top View )
5 ANODE
Features
* * Temperature range -40 to 125C Reference Voltage Tolerance at 25C * TL431A: 2.495V 1.0%. * * * * * * TL431B: 2.495V 0.5% Low Output Noise 0.2 Typical Output Impedance Sink Current Capability: 1mA to 100mA Adjustable Output Voltage: VREF to 36V SOT23 and SOT25: Available in "Green" Molding Compound (No Br, Sb) and Lead Free Finish/ RoHS Compliant (Note 1)
CATHODE
4
REF
SOT25
TL432 (Top View)
3 ANODE 1 2 REF CATHODE
Applications
SOT23
* * * * Opto-Coupler Linearisers Shunt Regulators Improved Zener Variable Reference
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html.
TL431/432
Document number: DS35050 Rev. 2 - 2
1 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR Absolute Maximum Ratings (Note 2)
Symbol VKA IKA IREF TJ TST Cathode Voltage Continuous Cathode Current Reference Input Current Operating Junction Temperature Storage Temperature Power Dissipation (Notes 3, 4) SOT23 SOT25 Parameter Rating 40 150 -0.050 to +10 +150 -55 to +150 330 500 Unit V mA mA

C C
NEW PRODUCT
PD
Notes:
mW mW
2. Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability. Unless otherwise stated voltages specified are relative to the ANODE pin. 3. TJ, max =150C. 4. Ratings apply to ambient temperature at 25C.
Recommended Operating Conditions
Symbol VKA IKA TA Cathode Voltage Cathode Current Operating Ambient Temperature Parameter Min VREF 1 -40 Max 36 100 125 Unit V mA C
TL431/432
Document number: DS35050 Rev. 2 - 2
2 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Electrical Characteristics (TA = +25C, unless otherwise noted)
Symbol VREF Parameter Reference voltage Test Conditions VKA = VREF, IKA = 10mA VKA = VREF, IKA = 10mA TL431A TL431B TA = 0 to 70 C VDEV Deviation of reference voltage over full temperature range (Note 5) Ratio of the change in reference voltage to the change in cathode voltage Reference input current IREF deviation over full temperature range (Note 5) Minimum cathode current for regulation Off-state current TA = -40 to 85 C TA = -40 to 125 C VREF VKA IREF IREF VKA = 10V to VREF IKA = 10mA VKA = 36V to 10V
o o o
Min 2.470 2.482
Typ. 2.495 2.495 6 14 14 -1.4 -1 1 0.8 0.8 0.8 0.4 0.05 0.2 380 250
Max 2.520 2.507 16 34 34 -2.7 -2 4 1.2 2.5 2.5 0.7 0.5 0.5
Unit V V mV mV mV mV/V mV/V A A A A mA A
o o
NEW PRODUCT
IKA = 10mA, R1 = 10K, R2 = TA = 0 to 70 C IKA = 10mA, R1 = TA = -40 to 85 oC 10K, R2 = TA = -40 to 125 oC VKA = VREF VKA = 36V, VREF = 0V
o
IKA(MIN) IKA(OFF) |ZKA| JA
Notes:
Dynamic output impedance (Note 6) VKA = VREF, f = 0Hz Thermal Resistance Junction to Ambient SOT23 SOT25
C/W C/W
5. Deviation of VDEV, and IREF are defined as the maximum variation of the values over the full temperature range.
The average temperature coefficient of the reference input voltage VREF is defined as:
Vmax
VDEV VREF = VREF @ 25C T2 - T1
X 106 ppm/C
Vmin
Where: T2 - T1 = full temperature change. VREF can be positive or negative depending on whether the slope is positive or negative. Notes: 6. The dynamic output impedance, RZ, is defined as:
VDEV = Vmax - Vmin
ZKA =
VKA IKA
T1
Temperature
T2
When the device is programmed with two external resistors R1 and R2, the dynamic output impedance of the overall circuit, is defined as:
Z' =
V I
ZKA
1+
R1 R2
TL431/432
Document number: DS35050 Rev. 2 - 2
3 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Test Circuits
NEW PRODUCT
Figure 1. Test circuit for VKA = VREF
Figure 2. Test circuit for VKA > VREF
Figure 3. Test circuit for IOFF
TL431/432
Document number: DS35050 Rev. 2 - 2
4 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Performance Characteristics
2600 2580
IKA = 10mA V KA = VREF TA = 25 C
0.2
R1 = 10K R2 = IKA = 10mA
V REF Reference Voltage (mV)
IREF Reference Current ( A)
2560 2540 2520 2500 2480 2460 2440 2420 2400 -55 -35
0.15
NEW PRODUCT
0.1
0.05
-15 5 25 45 65 85 105 125 TA Free Air Temperature ( C) Reference Voltage vs. Free Air Temperature
0 -55
-15 5 25 45 65 85 105 125 TA Free Air Temperature ( C) Reference Current vs. Free Air Temperature
-35
150
V KA = VREF TA = 25 C
200
V KA = VREF TA = 25 C
100
IKA Cathode Current (mA)
IKA Cathode Current ( A)
100
IKMIN
50
0
0
-50
-100 -2
0 1 2 V KA Cathode Voltage (V) Cathode Current vs. Cathode Voltage -1
3
-100 -2
0 1 2 V KA Cathode Voltage Cathode Current vs. Cathode Voltage -1
3
TL431/432
Document number: DS35050 Rev. 2 - 2
5 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR Typical Performance Characteristics (Continued)
0.50 0.45
IKOFF Off-State Cathode Current ( A)
V KA = 36V V REF = 0
-0.2
V KA = 3V t o 36V
-0.3 -0.4
dV REF/dV KA (mV/V)
0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 -75 -25 0 25 50 75 100 125 TA Free Air Temperature (C) Off-State Cathode Current vs. Free Air Temperature -50
-0.5 -0.6 -0.7 -0.8 -0.9 -1.0 -50
NEW PRODUCT
75 0 25 50 100 125 TA Free Air Temperature (C) Ratio of Delta Reference Voltage to Delta Cathode Voltage vs. Free Air Temperature -25
400
V N = Equivalent Input Noise Voltage nV/Hz
380 360 340 320 300 280 260 240 220 200 10
IKA = 10mA V KA = VREF TA = 25C
1K 10K 100K f- Frequency (Hz) Equivalent Input Noise Voltage vs. Frequency
100
TL431/432
Document number: DS35050 Rev. 2 - 2
6 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR Typical Performance Characteristics (Continued)
15 Vn - Equivalent Input Noise Voltage - V
IKA = 10mA V KA = VREF TA = 25 C
10
5
0
NEW PRODUCT
-5
-10
-15 0
4 5 6 7 8 9 10 Time (Seconds) Equivalent Input Noise Voltage Over A 10-S Period
1
2
3
Figure 4. Test circuit for noise input voltage
TL431/432
Document number: DS35050 Rev. 2 - 2
7 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR Typical Performance Characteristics (Continued)
70
A V Small-Signal Voltage Amplification (dB)
IKA = 10mA
60 50 40 30 20 10 0 100
TA = 25 C
NEW PRODUCT
10M 10K 100K 1M f Frequency (Hz) Small-Signal Voltage Amplification vs. Frequency 1K
Test circuit for voltage amplification
100.0
IKA = 10mA TA = 25 C
ZKA Reference Impedance ( )
10.0
1.0
0.1
Test circuit for reference impedance
0.0 1K 100K 1M f Frequency (Hz) Reference Impedance vs. Frequency 10K 10M
TL431/432
Document number: DS35050 Rev. 2 - 2
8 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR Typical Performance Characteristics (Continued)
6
Input TA = 25 C
5
Input and Output Voltage (V)
4
NEW PRODUCT
3
Out put
2
1
Test Circuit for Pulse Response
0
0
1
2
3
5 6 7 t Time (s) Pulse Response
D
4
8
9
10
100 90 80
IKA - Cathode Current - mA
D TA = 25 C
C
C
A
B
70
Stable Stable Stable
60 50 40 30 20 10
A VKA = V REF B V KA = 5V C V KA = 10V D V KA = 15V B
Test Circuit for Curve A
0 0.00001 0.0001 0.001 0.01 0.1 1 C L -Load Capacitance - uF Stability Boundary Conditions
10
Test circuit for curves B, C, D
Test Circuit for Curves B, C, D
The device is stable under all conditions with a load capacitance not exceeding 50pF. The device is stable under all conditions with a load capacitance between 5nF and 20nF. The device is stable under all conditions with a load capacitance exceeding 300nF. With a cathode current not exceeding 5mA, the device is stable with any load capacitance.
TL431/432
Document number: DS35050 Rev. 2 - 2
9 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR Applications Information
NEW PRODUCT
Shunt Regulator
Higher Current Shunt Regulator
Output Control of a Three Terminal Fixed Regulator
Series Regulator
Single Supply Comparator with Temperature Compensated Threshold
Over Voltage / Under Voltage Protection Circuit
TL431/432
Document number: DS35050 Rev. 2 - 2
10 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Ordering Information
TL43 X X XX - 7
Pinout variation 1: Standard pinout 2: Reversed pinout in SOT23
Tolerance A: 1.0% B: 0.5%
Package SA: SOT23 W5: SOT25
Packing 7: Tape & Reel
NEW PRODUCT
Device (Note 7) TL431A(B)SA-7 TL431A(B)W5-7 TL432A(B)SA-7
Notes:
Package Code SA W5 SA
Packaging (Note 5) SOT23 SOT25 SOT23
7" Tape and Reel Part Number Quantity Suffix 3000/Tape & Reel -7 3000/Tape & Reel -7 3000/Tape & Reel -7
Ammo Box Quantity NA NA NA Part Number Suffix NA NA NA
7. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. 8. Suffix "B" denotes TL431B device.
TL431/432
Document number: DS35050 Rev. 2 - 2
11 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Marking Information
(1) SOT23
( Top View )
3 XX Y W X
NEW PRODUCT
1
Device TL431ASA TL431BSA TL432ASA TL432BSA
2
XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green
Package SOT23 SOT23 SOT23 SOT23
Identification Code AA AB BA BB
(2) SOT25
( Top View )
5
4
7
XX Y W X 1 2 3
XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green
Device TL431AW5 TL431BW5
Package SOT25 SOT25
Identification Code AA AB
TL431/432
Document number: DS35050 Rev. 2 - 2
12 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
Package Outline Dimensions (All Dimensions in mm)
(1) Package type: SOT25
NEW PRODUCT
(2) Package Types: SOT23
TL431/432
Document number: DS35050 Rev. 2 - 2
13 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated
TL431/TL432
ADJUSTABLE PRECISION SHUNT REGULATOR
IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness.
NEW PRODUCT
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright (c) 2010, Diodes Incorporated www.diodes.com
TL431/432
Document number: DS35050 Rev. 2 - 2
14 of 14 www.diodes.com
September 2010
(c) Diodes Incorporated

▲Up To Search▲

Price & Availability of TL431

	To Download TL431 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .