Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsTL1431IDT

Table Of Contents

This is information on a product in full production.

September 2012 Doc ID 5286 Rev 5 1/18

TL1431

Programmable voltage reference

Datasheet − production data

Features

■ Adjustable output voltage: V

REF

to 36 V

■ Sink current capability: 1 to 100 mA

■ Typical output impedance: 0.22 Ω

■ 0.4% and 0.25% voltage precision

■ Automotive temp. range - 40 °C to +125 °C

Description

The TL1431 is a programmable shunt voltage

reference with guaranteed temperature stability

over the entire operating temperature range.

The output voltage may be set to any value

between 2.5 V and 36 V with two external

resistors.

The TL1431 operates with a wide current range

from 1 to 100 mA with a typical dynamic

impedance of 0.2 Ω.

SO-8

(Batwing plastic micropackage)

TO92

(Plastic package)

www.st.com

Summary of content (18 pages)

PAGE 1
TL1431 Programmable voltage reference Datasheet − production data Features ■ Adjustable output voltage: VREF to 36 V ■ Sink current capability: 1 to 100 mA ■ Typical output impedance: 0.22 Ω ■ 0.4% and 0.25% voltage precision ■ Automotive temp. range - 40 °C to +125 °C Description Z TO92 (Plastic package) The TL1431 is a programmable shunt voltage reference with guaranteed temperature stability over the entire operating temperature range. The output voltage may be set to any value between 2.
PAGE 2
Contents TL1431 Contents 1 Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Parameter definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.1 Reference input voltage deviation over temperature range . . . . . . . . . . .
PAGE 3
TL1431 1 Schematic diagrams Schematic diagrams Figure 1. TO92 pin connections (top view) Cathode Anode Reference 1 Figure 2. 2 3 SO-8 pin connections (top view) 8 7 6 5 1 - Cathode 2 - Anode 3 - Anode 4 - N.C. 5 - N.C. 6 - Anode 7 - Anode 8 - Reference 1 Figure 3.
PAGE 4
Absolute maximum ratings and operating conditions 2 TL1431 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol VKA Parameter Cathode to anode voltage Value Unit 37 V Ik Continuous cathode current range -100 to +150 mA Iref Reference input current range -0.
PAGE 5
TL1431 3 Electrical characteristics Electrical characteristics Tamb = 25 °C (unless otherwise specified). Table 3. Electrical characteristics for TL1431C, TL1431AC TL1431C Symbol TL1431AC Parameter Unit Min. Typ. Max. Min. Typ. Max.
PAGE 6
Electrical characteristics TL1431 Tamb = 25 °C (unless otherwise specified). Table 4. Electrical characteristics for TL1431I, TL1431AI TL1431I Symbol TL1431AI Parameter Unit Min. Typ. Max. Min. Typ.
PAGE 7
TL1431 Electrical characteristics Tamb = 25 °C (unless otherwise specified). Table 5. Electrical characteristics for TL1431IY, TL1431AIY TL1431IY Symbol TL1431AIY Parameter Unit Min. Typ. Max. Min. Typ.
PAGE 8
Electrical characteristics Figure 4. TL1431 Test circuit VKA = VREF Figure 5. Test circuit for VKA > VREF Input Input R Output R IK Output R1 IK=10mA VKA IREF R2 VKA VREF VREF R1 VKA = VREF ( 1 + -------- ) + R1 x IREF R2 Figure 6. Test circuit for IOFF Figure 7. Test circuit for phase margin and voltage gain VKA=36V 10μF 10μF Figure 8. Test circuit for response time Figure 9. Output 8.25kΩ Input IK=10mA 15kΩ IOFF VREF Reference voltage vs.
PAGE 9
TL1431 Electrical characteristics Figure 10. Reference voltage vs. cathode current Figure 11. Reference voltage vs. cathode current (IK = 0 to 1 mA) 3.0 Reference voltage (V) Reference voltage (V) 3 2 VKA=VREF See figure 1 1 0 2.5 2.0 VKA=VREF See figure 1 1.5 1.0 0.5 -1 -40 -20 0 20 40 60 80 0.0 0.0 100 0.2 0.4 Cathode current (mA) 0.6 Figure 12. Reference current vs. temperature 0.10 VKA = 36V See figure 3 0.08 IOFF (µA) IREF (µA) 1.5 1.
PAGE 10
Electrical characteristics TL1431 Figure 16. Maximum operating current vs. temperature Figure 17. Gain and phase vs. frequency 0.52 200 60 IK=10 mA See figure 4 Gain 0.50 40 150 100 Gain (dB) IK=IMIN VKA=VREF See figure 1 0.46 50 Phase 20 0 0 -50 0.44 -100 -20 0.42 -150 0.40 -40 -40 -20 0 20 40 60 80 100 120 1 10 100 Frequency (kHz) Temperature (°C) Figure 18. Stability behavior with capacitive loads Figure 19.
PAGE 11
TL1431 Parameter definitions 4 Parameter definitions 4.1 Reference input voltage deviation over temperature range ΔVref is defined as the difference between the maximum and minimum values obtained over the full temperature range. ΔVref = Vref max. - Vref min. Figure 21. Reference input voltage deviation over temperature range V ref max. V ref min. 4.
PAGE 12
Package mechanical data 5 TL1431 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark.
PAGE 13
TL1431 Package mechanical data Figure 23. SO-8 batwing package mechanical drawing 0016023_C Table 6. SO-8 batwing package mechanical data Dimensions Ref. Millimeters Min. Typ. A Inches Max. Min. Typ. 1.75 0.069 A1 0.10 A2 1.25 b 0.28 0.48 0.011 0.019 c 0.17 0.23 0.007 0.010 D 4.80 4.90 5.00 0.189 0.193 0.197 E 5.80 6.00 6.20 0.228 0.236 0.244 E1 3.80 3.90 4.00 0.150 0.154 0.157 e 0.25 Max. 0.004 0.010 0.049 1.27 0.050 h 0.25 0.50 0.010 0.
PAGE 14
Package mechanical data TL1431 Figure 24. TO-92 ammopack and tape and reel package mechanical drawing A1 P T P A H W2 W0 W W1 H0 I1 H L1 H1 d D0 F1 F2 P2 P0 Table 7. TO-92 ammopack and tape and reel package mechanical data Millimeters Inches Dim. Min. Typ. Min. Typ. Max. AL 5.0 0.197 A 5.0 0.197 T 4.0 0.157 d 0.45 0.018 I1 2.5 P 11.7 12.7 13.7 0.461 0.500 0.539 PO 12.4 12.7 13 0.488 0.500 0.512 P2 5.95 6.35 6.75 0.234 0.250 0.266 F1/F2 2.4 2.
PAGE 15
TL1431 Package mechanical data Figure 25. TO-92 bulk package mechanical drawing Table 8. TO-92 bulk package mechanical data Millimeters Inches Dim. Min. L Typ. Max. Min. 1.27 Typ. Max. 0.05 B 3.2 3.7 4.2 0.126 0.1457 0.1654 O1 4.45 5.00 5.2 0.1752 0.1969 0.2047 C 4.58 5.03 5.33 0.1803 0.198 0.2098 K 12.7 O2 0.407 0.0197 0.02 a 0.35 0.5 0.5 0.508 0.016 0.
PAGE 16
Ordering information TL1431 6 Ordering information Table 9. Order codes Order codes TL1431CD TL1431CDT Accuracy (%) Temperature range Package Packing SO-8 Tube or tape and reel 0.4 TL1431ACD TL1431ACDT 0.25 TL1431CZ TL1431CZT TL1431CZ-AP 0.4 1431C 1431AC - 20°C, +70°C TL1431C TO92 TL1431ACZ TL1431ACZT TL1431ACZ-AP 0.25 TL1431ID TL1431IDT 0.4 TL1431AID TL1431AIDT 0.25 TL1431IZ TL1431ZT TL1431IZ-AP 0.
PAGE 17
TL1431 7 Revision history Revision history Table 10. Document revision history Date Revision 01-Mar-2002 1 Initial release. 01-Nov-2005 2 PPAP references inserted in the datasheet seeTable 9: Order codes on page 16. 3 Minimum value for temperature range updated in Table 2: Operating conditions. ΔVref ---------------Minimum values added and maximum values deleted for ΔVka parameter in Table 4 in Section 3: Electrical characteristics.
PAGE 18
TL1431 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.