Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsTS3431AILT

This is information on a product in full production.

August 2012 Doc ID 10174 Rev 4 1/13

TS3431

1.24 V programmable shunt voltage reference

Datasheet − production data

Features

■ Adjustable output voltage: 1.24 to 24 V

■ Several precision levels @ 25°C ± 2%, ± 1%,

± 0.5% and ± 0.25%

■ Sink current capability: 0.4 to 100 mA

■ Industrial temperature range: - 40°C to +125°C

■ Performance compatible with industry

standard TL431

Applications

■ Computers

■ Instrumentation

■ Battery chargers

■ Switch mode power supply

■ Battery operated equipment

Description

The TS3431 is a programmable shunt voltage

reference with guaranteed temperature stability

over the entire operating temperature range (- 40

°C to + 125 °C). The output voltage can be set to

any value between 1.24 V and 24 V with an

external resistor bridge.

Available in SOT23-3 surface mount package, it

can be used in application designs where space

saving is critical.

SOT23-3L

(Plastic micropackage)

SOT23-3

(top view)

Cathode

Reference

Anode

TS3431

www.st.com

Summary of content (13 pages)

PAGE 1
TS3431 1.24 V programmable shunt voltage reference Datasheet − production data Features ■ Adjustable output voltage: 1.24 to 24 V ■ Several precision levels @ 25°C ± 2%, ± 1%, ± 0.5% and ± 0.25% ■ Sink current capability: 0.
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Contents TS3431 Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 Ordering information . . . . . . . . . . . . . . . . . . .
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TS3431 1 Block diagram Block diagram Figure 1.
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Absolute maximum ratings 2 TS3431 Absolute maximum ratings Table 1. Absolute maximum ratings (AMR) Symbol VKA IK IREF Parameter Value Unit 25 V -100 to +150 mA -0.05 to10 mA 360 mW -65 to +150 °C 2 kV Machine model (MM) 200 V Lead temperature (soldering, 10 seconds) 250 °C Value Unit Cathode to anode voltage Reverse breakdown current Reference current Pd Power dissipation (1) SOT23-3L Tstg Storage temperature Human body model (HBM) ESD Tlead 1.
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TS3431 Electrical characteristics 3 Electrical characteristics Table 3. Tamb = 25°C (unless otherwise specified) (1) Symbol VK ΔVK TC Parameter Test conditions Reference input voltage IK = 10 mA, Vka = Vref Variation of reference input voltage over temperature, Vka = Vref Temperature coefficient TS3431 (2%) 1.215 TS3431A (1%) 1.228 ΔVref ---------------ΔVka IREF ΔIREF IOFF Typ. Max. 1.252 V TS3431B (0.5%) 1.234 1.246 TS3431C (0.25%) 1.237 1.
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Electrical characteristics Figure 2. TS3431 Reference voltage vs. temperature Figure 3. Test circuit for VK = Vref Voltage Reference (V) 1.250 Input Output 1.245 Ik IK = 10mA VK = VREF 1.240 Vka 1.235 Vref 1.230 -40 0 40 80 120 Temperature (°C) Figure 4. Cathode voltage vs. cathode current Figure 5. IKMIN (mA) T=-40°C Minimum operating current Cathode voltage VK (V) 1.5 1.0 0.5 0.0 0.0 T=+25°C 0.1 T=+125°C 0.2 0.3 0.5 0.4 0.3 VK = VREF 0.2 0.1 0.0 -40 0.
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TS3431 Electrical characteristics Figure 8. Off-state current vs temperature Figure 9. Test circuit for off-state current measurement OFF State Current IOFF (nA) 300 Vka=24V Ioff 200 100 0 -40 0 40 80 120 Temperature (°C) Figure 10. Ratio of change in reference input voltage to change in VKA voltage vs. temperature 2.0 Figure 11. Test circuit for VK > VREF Input Vka ΔVREF / ΔVK (mV/V) Ik 1.5 R1 Iref 1.0 ΔVK = 1.24 to 24V IK = 10 mA 0.5 0.
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Electrical characteristics TS3431 Figure 14. Pulse response at IK = 10mA Figure 15. Test circuit for pulse response at IK = 10mA 5.0 Input Voltage T=+25°C ... 270 Ω Output voltage Output 4V 2.5 Intput Voltage (V) IK=10mA 0 ... 0.0 0 2 4 6 8 Time (µs) Figure 16. Phase and gain vs frequency Figure 17. Equivalent input noise vs.
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TS3431 4 Package mechanical data 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.
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Package mechanical data Table 4. TS3431 SOT23-3L package mechanical data Dimensions Ref. Millimeters Min. Typ. Mils Max. Min. Typ. A 0.890 1.120 35.05 44.12 A1 0.010 0.100 0.39 3.94 A2 0.880 1.020 34.65 b 0.300 0.500 11.81 19.69 C 0.080 0.200 3.15 7.88 D 2.800 3.040 110.26 E 2.100 2.64 82.70 E1 1.200 1.400 47.26 0.950 2.900 1.300 37.41 114.17 51.19 0.950 37.41 e1 1.900 74.82 0.400 L1 k 0.600 15.75 0.540 0° 40.17 119.72 103.96 e L 55.13 23.
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TS3431 5 Ordering information Ordering information s Table 5.
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Revision history 6 TS3431 Revision history Table 6. 12/13 Document revision history Date Revision Changes 1-Jan-2004 1 Initial release. 1-Dec-2004 2 Specific content changes as follows: – CI version added in Table 5: Order codes. – Rthjc information added in Table 1: Absolute maximum ratings (AMR). – Test condition added in electrical characteristics Table 3. 26-Jun-2007 3 Removed TO-92 package information and associated order codes. Re-ordered electrical characteristics figures.
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TS3431 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.