Datasheet ATL432LI-Q1 (Texas Instruments)

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ATL431LI-Q1 ATL432LI-Q1
SNVSBB0A – MAY 2019 – REVISED NOVEMBER 2019
ATL431LI-Q1 / ATL432LI-Q1 High Bandwidth Low-IQ Programmable Shunt Regulator 1 Features 3 Description
• Qualified for automotive applications The ATL43xLI-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. Its output voltage can be set to ambient operating temperature any value between Vref (approximately 2.5 V) and 36 • Reference voltage tolerance at 25°C V with two external resistors. The device has a typical output impedance of 0.3 Ω. Its active output circuitry – 0.5% (B grade) provides a very sharp turn-on characteristic, making it – 1% (A grade) an excellent replacement for Zener diodes in many • Minimum typical output voltage: 2.5 V applications, such as onboard regulation, adjustable power supplies, and switching power supplies. This • Adjustable output voltage: Vref to 36 V device is a pin-to-pin alternative to the TL431LI-Q1 • Operation from −40°C to +125°C and TL432LI-Q1, with lower minimum operating • 27 mV maximum temperature drift current to help reduce system power consumption. • 0.3-Ω typical output impedance The ATL432LI-Q1 has exactly the same functionality and electrical specifications as the ATL431LI-Q1, but • Sink-current capability has a different pinout for the DBZ package. – Imin = 0.08 mA (max) The ATL431LI-Q1 is offered in two grades, with initial – IKA = 15 mA (max) tolerances (at 25°C) of 0.5%, and 1%, for the B and A • Reference input current IREF: 0.4 μA (max) grade, respectively. The ATL43xLI-Q1 is • Deviation of reference input current over characterized for operation from –40°C to +125°C, temperature, I and its low output drift versus temperature ensures I(dev): 0.3 μA (max) good stability over the entire temperature range.
2 Applications Device Information(1)
• Inverter and motor control
PART NUMBER PACKAGE (PIN) BODY SIZE (NOM)
• DC/DC converter ATL43xLI SOT-23 (3) 2.90 mm x 1.30 mm • LED lighting (1) For all available packages, see the orderable addendum at • On-board charger (OBC) the end of the data sheet. • Infotainment and cluster
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 10.2.8 Adjustable Reference for Tracking LDO 10.2.8.1 Design Requirements 10.2.8.2 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