ATL43x 2.5-V Low Iq Adjustable Precision Shunt …

1 Product Order Technical Tools & Support & Reference Folder Now Documents Software Community Design ATL431, ATL432. SLVSCV5D MARCH 2015 REVISED OCTOBER 2016. ATL431, ATL432 Low Iq Adjustable Precision Shunt Regulator 1 Features 3 Description . 1 Adjustable Regulated Output of V to 36 V The ATL431 and ATL432 are three-terminal Adjustable Shunt regulators, with specified thermal Very-Low Operating Current stability over applicable automotive, commercial, and IKA(min) = 35 A (Max) industrial temperature ranges. The output voltage can IREF = 150 nA (Max) be set to any value between Vref (approximately V) and 36 V, with two external resistors. These Internally Compensated for Stability devices have a typical output impedance of.

2 Stable With No Capacitive Load Active output circuitry provides a very sharp turn-on Reference Voltage Tolerances at 25 C characteristic, making these devices excellent for B Grade replacements for Zener diodes in many applications, such as onboard regulation, Adjustable power 1% for A Grade supplies, and switching power supplies. Typical Temperature Drift The ATL43x has > 20x improvement cathode current 5 mV ( 40 C to +85 C); I Version range over it's TL43x predecessor. It also is stable 6 mV ( 40 C to +125 C); Q Version with a wider range of load capacitance types and Extended Cathode Current Range values. 35 A to 100 mA ATL431 and ATL432 are the exact same parts but Low Output Impedance of (Max) with different pinouts and order numbers.

3 The ATL43x is offered in two grades, with initial 2 Applications tolerances (at 25 C) of , 1%, for the B and A. grade, respectively. In addition, low output drift vs Secondary Side Regulation in Flyback SMPSs temperature ensures consistent voltage regulation Industrial, Computing, Consumer, and Portables over the entire temperature range. Adjustable Voltage and Current Referencing The ATL43xxI devices are characterized for operation Power Management from 40 C to +85 C, and the ATL43xxQ devices are characterized for operation from 40 C to +125 C. Power Isolation Zener Replacement Device Information(1). PART NUMBER PACKAGE BODY SIZE (NOM). ATL431. SOT (3) mm mm ATL432. (1) For all available packages, see the orderable addendum at the end of the data sheet.

4 Simplified Schematic Stability Region for VKA = V. Input VKA 2000. IKA. 1000. IKA(PA). Vref STABLE. 100. 20. 1 10. CKA(PF) D001. 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. ATL431, ATL432. SLVSCV5D MARCH 2015 REVISED OCTOBER 2016 Table of Contents 1 Features .. 1 Feature 11. 2 Applications .. 1 Device Functional 12. 3 Description .. 1 9 Application and Implementation .. 13. 4 Revision 2 Application 13. Typical Applications .. 14. 5 Pin Configuration and Functions .. 3. 6 3 10 Power Supply Recommendations .. 18. Absolute Maximum Ratings.

5 3 11 18. ESD 3 Layout Guidelines .. 18. Recommended Operating 3 Layout Example .. 18. Thermal Information .. 4 12 Device and Documentation Support .. 19. Electrical Characteristics, ATL431Ax, ATL432Ax .. 4 Related Links .. 19. Electrical Characteristics, ATL431Bx, ATL432Bx .. 4 Receiving Notification of Documentation Updates 19. Typical Characteristics .. 5 Community 19. 7 Parameter Measurement Information .. 9 Trademarks .. 19. Electrostatic Discharge Caution .. 19. 8 Detailed Description .. 11. Glossary .. 19. Overview .. 11. Functional Block Diagram .. 11 13 Mechanical, Packaging, and Orderable Information .. 19. 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

6 Changes from Revision C (September 2015) to Revision D Page Changed Small-Signal Voltage Amplification vs Frequency with an updated graph to provide additional data .. 6. Changed Test Circuit for Phase and Gain Measurement with an updated 9. Updated Comparator Mode specifications in Design 14. Added Receiving Notification of Documentation Updates section .. 19. Changes from Revision B (May 2015) to Revision C Page Changed ATL432xx status from PREVIEW to PRODUCTION.. 1. Changes from Revision A (April 2015) to Revision B Page Changed ATL431AQ, ATL431BI and ATL431BQ status from PREVIEW to PRODUCTION.. 1. Changed flyback schematic to represent a more robust design .. 13. Added flyback supply reliability 18.

7 Changes from Original (March 2013) to Revision A Page Initial release of full verison.. 1. 2 Submit Documentation Feedback Copyright 2015 2016, Texas Instruments Incorporated Product Folder Links: ATL431 ATL432. ATL431, ATL432. SLVSCV5D MARCH 2015 REVISED OCTOBER 2016. 5 Pin Configuration and Functions ATL431 DBZ Package 3-Pin SOT-23 ATL432 DBZ Package Top View 3-Pin SOT-23. Top View CATHODE 1. REF 1. 3 ANODE. 3 ANODE. REF 2. CATHODE 2. Not to scale Not to scale Pin Functions PIN. NO. I/O DESCRIPTION. NAME. ATL431x ATL432x CATHODE 1 2 I/O Shunt Current/Voltage input REF 2 1 I Threshold relative to common anode ANODE 3 3 O Common pin, normally connected to ground 6 Specifications Absolute Maximum Ratings (1).

8 Over operating free-air temperature range (unless otherwise noted). MIN MAX UNIT. (2). VKA Cathode voltage 40 V. IKA Continuous cathode current 100 150 mA. II(ref) Reference input current 10 mA. TJ Operating virtual junction temperature 40 150 C. Tstg Storage temperature 65 150 C. (1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) All voltage values are with respect to ANODE, unless otherwise noted.

9 ESD Ratings VALUE UNIT. Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) 2000. V(ESD) Electrostatic discharge V. Charged-device model (CDM), per JEDEC specification JESD22-C101 (2) 1000. (1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. (2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. Recommended Operating Conditions MIN MAX UNIT. VKA Cathode voltage Vref 36 V. IKA Cathode current .035 100 mA. "I" Grade 40 85. TA Operating free-air temperature C. "Q" Grade 40 125. Copyright 2015 2016, Texas Instruments Incorporated Submit Documentation Feedback 3. Product Folder Links: ATL431 ATL432.

10 ATL431, ATL432. SLVSCV5D MARCH 2015 REVISED OCTOBER 2016 Thermal Information ATL43xx THERMAL METRIC (1) DBZ (SOT-23) UNIT. 3 PINS. R JA Junction-to-ambient thermal resistance C/W. R JC(top) Junction-to-case (top) thermal resistance C/W. R JB Junction-to-board thermal resistance C/W. JT Junction-to-top characterization parameter C/W. JB Junction-to-board characterization parameter C/W. (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report. Electrical Characteristics, ATL431Ax, ATL432Ax over recommended operating conditions, TA = 25 C (unless otherwise noted). PARAMETER TEST CIRCUIT TEST CONDITIONS MIN TYP MAX UNIT. Vref Reference voltage Figure 22 VKA = Vref, IKA = 1 mA 2475 2500 2525 mV.