Datasheet TL432LI-Q1 (Texas Instruments)

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TL431LI-Q1 TL432LI-Q1
SNVSBA4A – MAY 2019 – REVISED NOVEMBER 2019
TL431LI-Q1 / TL432LI-Q1 Programmable Shunt Regulator With Optimized Reference Current 1 Features 3 Description
• Qualified for automotive applications The TL431LI-Q1 is a three-terminal adjustable shunt 1 regulator, with specified thermal stability over • AEC-Q100 qualified with the following results: applicable automotive, commercial, and military – Device temperature grade 1: –40°C to +125°C temperature ranges. The output voltage can be set to ambient operating temperature any value between Vref (approximately 2.495 V) and – Device temperature grade 0: –40°C to +150°C 36 V with two external resistors. The device has a ambient operating temperature typical output impedance of 0.3 Ω. Its active output circuitry provides a very sharp turn-on characteristic, • Reference voltage tolerance at 25°C making it an excellent replacement for Zener diodes – 0.5% (B grade) in many applications, such as onboard regulation, – 1% (A grade) adjustable power supplies, and switching power supplies. This device is a pin-to-pin alternative to the • Minimum typical output voltage: 2.495 V industry standard TL431-Q1 with optimized Iref and • Adjustable output voltage: Vref to 36 V IIdev performance. The lower Iref and IIdev values of the • 27 mV maximum temperature drift for grade 1 TL431LI-Q1 enable designers to achieve higher system accuracy and lower leakage current. The • 34 mV maximum temperature drift for grade 0 TL432LI-Q1 has exactly the same functionality and • 0.3-Ω typical output impedance electrical specifications as the TL431LI-Q1, but has a • Sink-current capability different pinout for the DBZ package. – Imin = 0.6 mA (max) The TL431LI-Q1 is offered in two grades, with initial – I tolerances (at 25°C) of 0.5% and 1%, for the B and A KA = 15 mA (max) • Reference input current I grade, respectively. The TL431LI-Q1 is also available REF: 0.4 μA (max) in two temperature grades: grade 1 (denoted by a 'Q' • Deviation of reference input current over in the part number), and grade 0 (denoted by a 'E' in temperature, II(dev): 0.3 μA (max) the part number), which represent maximum ambient operating temperatures of 125°C and 150°C
2 Applications
respectively. The TL43xLI-Q1 is characterized for • Inverter and motor control operation from –40°C to 125°C for grade 1, and –40°C to 150°C for grade 0, and its low output drift • DC/DC converter versus temperature ensures good stability over the • LED lighting entire temperature range. • On-board charger (OBC)
Device Information(1)
• Infotainment and cluster
PART NUMBER PACKAGE (PIN) BODY SIZE (NOM)
• Engine management actuator TL43xLI-Q1 SOT-23 (3) 2.90 mm x 1.30 mm • Transmission (1) For all available packages, see the orderable addendum at • Power steering the end of the data sheet. • Powertrain exhaust sensor • Alternator starter
Simplified Schematic
Input VKA IKA Vref 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Device Comparison Table 6 Pin Configuration and Functions 7 Specifications 7.1 Absolute Maximum Ratings 7.2 ESD Ratings 7.3 Recommended Operating Conditions 7.4 Thermal Information 7.5 Electrical Characteristics 7.6 Typical Characteristics 8 Parameter Measurement Information 8.1 Temperature Coefficient 8.2 Dynamic Impedance 9 Detailed Description 9.1 Overview 9.2 Functional Block Diagram 9.3 Feature Description 9.4 Device Functional Modes 9.4.1 Open Loop (Comparator) 9.4.2 Closed Loop 10 Applications and Implementation 10.1 Application Information 10.2 Typical Applications 10.2.1 Comparator With Integrated Reference 10.2.2 Design Requirements 10.2.3 Detailed Design Procedure 10.2.3.1 Basic Operation 10.2.3.2 Output Voltage and Logic Input Level 10.2.4 Application Curves 10.2.5 Precision LED Lighting Current Sink Regulator 10.2.5.1 Design Requirements 10.2.5.2 Detailed Design Procedure 10.2.6 Shunt Regulator/Reference 10.2.6.1 Design Requirements 10.2.6.2 Detailed Design Procedure 10.2.6.3 Application Curves 10.2.7 Isolated Flyback with Optocoupler 10.2.7.1 Design Requirements 10.2.7.2 Detailed Design Procedure 10.3 System Examples 11 Power Supply Recommendations 12 Layout 12.1 Layout Guidelines 12.2 Layout Example 13 Device and Documentation Support 13.1 Device Support 13.1.1 Device Nomenclature 13.2 Documentation Support 13.2.1 Related Documentation 13.3 Related Links 13.4 Receiving Notification of Documentation Updates 13.5 Support Resources 13.6 Trademarks 13.7 Electrostatic Discharge Caution 13.8 Glossary 14 Mechanical, Packaging, and Orderable Information