TLVH431, TLVH432 Low-Voltage Adjustable Precision .V REF Input V I O K Product Folder Sample & Buy

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    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.

    TLVH431, TLVH431A, TLVH431BTLVH432, TLVH432A, TLVH432B

    SLVS555K NOVEMBER 2004REVISED SEPTEMBER 2016

    TLVH431, TLVH432 Low-Voltage Adjustable Precision Shunt Regulators

    1

    1 Features1 Low-Voltage Operation: Down to 1.24 V Reference Voltage Tolerances at 25C

    0.5% for B Grade 1% for A Grade 1.5% for Standard Grade

    Adjustable Output Voltage, VO = VREF to 18 V Wide Operating Cathode Current Range:

    100 A to 70 mA 0.25- Typical Output Impedance 40C to +125C Specifications TLVH432 Provides Alternative Pinouts for

    SOT-23-3 and SOT-89 Packages Ultra-Small SC-70 Package Offers 40%

    Smaller Footprint than SOT-23-3

    2 Applications Adjustable Voltage and Current Referencing Secondary Side Regulation in Flyback SMPSs Zener Replacement Voltage Monitoring Comparator with Integrated Reference

    3 DescriptionThe TLVH431 and TLVH432 devices are low-voltage3-terminal adjustable voltage references, withspecified thermal stability over applicable industrialand commercial temperature ranges. Output voltagecan be set to any value between VREF (1.24 V) and18 V with two external resistors (see Figure 19).These devices operate from a lower voltage (1.24 V)than the widely used TL431 and TL1431 shunt-regulator references.

    When used with an optocoupler, the TLVH431 andTLVH432 devices are ideal voltage references inisolated feedback circuits for 3-V to 3.3-V switching-mode power supplies. They have a typical outputimpedance of 0.25 . Active output circuitry providesa very sharp turn-on characteristic, making theTLVH431 and TLVH432 devices excellentreplacements for low-voltage Zener diodes in manyapplications, including on-board regulation andadjustable power supplies.

    The TLVH432 device is identical to the TLVH431device, but is offered with different pinouts for the3-pin SOT-23 and SOT-89 packages.

    Device Information(1)PART NUMBER PACKAGE BODY SIZE (NOM)

    TLVH43xxDBZ SOT-23 (5) 2.90 mm 1.60 mmTLVH43xxDBZ SOT-23 (3) 2.92 mm 1.30 mmTLVH43xxDCK SC70 (6) 2.00 mm 1.25 mmTLVH43xxLP TO-92 (3) 4.30 mm 4.30 mmTLVH43xxPK SOT-89 (3) 4.50 mm 2.50 mm

    (1) For all available packages, see the orderable addendum atthe end of the data sheet.

    Simplified Schematic

    http://www.ti.com/product/tlvh431?qgpn=tlvh431http://www.ti.com/product/tlvh431a?qgpn=tlvh431ahttp://www.ti.com/product/tlvh431b?qgpn=tlvh431bhttp://www.ti.com/product/tlvh432?qgpn=tlvh432http://www.ti.com/product/tlvh432a?qgpn=tlvh432ahttp://www.ti.com/product/tlvh432b?qgpn=tlvh432b

  • 2

    TLVH431, TLVH431A, TLVH431BTLVH432, TLVH432A, TLVH432BSLVS555K NOVEMBER 2004REVISED SEPTEMBER 2016 www.ti.com

    Product Folder Links: TLVH431 TLVH431A TLVH431B TLVH432 TLVH432A TLVH432B

    Submit Documentation Feedback Copyright 20042016, Texas Instruments Incorporated

    Table of Contents1 Features .................................................................. 12 Applications ........................................................... 13 Description ............................................................. 14 Revision History..................................................... 25 Pin Configuration and Functions ......................... 36 Specifications......................................................... 4

    6.1 Absolute Maximum Ratings ...................................... 46.2 ESD Ratings.............................................................. 46.3 Recommended Operating Conditions....................... 46.4 Thermal Information .................................................. 46.5 TLVH43x Electrical Characteristics........................... 56.6 TLVH43xA Electrical Characteristics ........................ 66.7 TLVH43xB Electrical Characteristics ........................ 76.8 Typical Characteristics .............................................. 8

    7 Parameter Measurement Information ................ 158 Detailed Description ............................................ 16

    8.1 Overview ................................................................. 168.2 Functional Block Diagram ....................................... 16

    8.3 Feature Description................................................. 178.4 Device Functional Modes........................................ 18

    9 Applications and Implementation ...................... 199.1 Application Information............................................ 199.2 Typical Applications ................................................ 20

    10 Power Supply Recommendations ..................... 2411 Layout................................................................... 24

    11.1 Layout Guidelines ................................................. 2411.2 Layout Example .................................................... 24

    12 Device and Documentation Support ................. 2512.1 Documentation Support ........................................ 2512.2 Receiving Notification of Documentation Updates 2512.3 Community Resources.......................................... 2512.4 Related Links ........................................................ 2512.5 Trademarks ........................................................... 2512.6 Electrostatic Discharge Caution............................ 2512.7 Glossary ................................................................ 25

    13 Mechanical, Packaging, and OrderableInformation ........................................................... 26

    4 Revision HistoryNOTE: Page numbers for previous revisions may differ from page numbers in the current version.

    Changes from Revision J (January 2015) to Revision K Page

    Changed data sheet title......................................................................................................................................................... 1 Updated pinout images and Pin Functions table.................................................................................................................... 3 Deleted D package from Pin Functions table ......................................................................................................................... 3 Added Receiving Notification of Documentation Updates section and Community Resources section .............................. 25

    Changes from Revision I (September 2009) to Revision J Page

    Added Applications, Device Information table, Pin Functions table, ESD Ratings table, Thermal Information table,Typical Characteristics, Feature Description section, Device Functional Modes, Application and Implementationsection, Power Supply Recommendations section, Layout section, Device and Documentation Support section, andMechanical, Packaging, and Orderable Information section. ................................................................................................. 1

    Deleted Ordering Information table. ....................................................................................................................................... 1

    http://www.ti.com/product/tlvh431?qgpn=tlvh431http://www.ti.com/product/tlvh431a?qgpn=tlvh431ahttp://www.ti.com/product/tlvh431b?qgpn=tlvh431bhttp://www.ti.com/product/tlvh432?qgpn=tlvh432http://www.ti.com/product/tlvh432a?qgpn=tlvh432ahttp://www.ti.com/product/tlvh432b?qgpn=tlvh432bhttp://www.ti.comhttp://www.ti.com/product/tlvh431?qgpn=tlvh431http://www.ti.com/product/tlvh431a?qgpn=tlvh431ahttp://www.ti.com/product/tlvh431b?qgpn=tlvh431bhttp://www.ti.com/product/tlvh432?qgpn=tlvh432http://www.ti.com/product/tlvh432a?qgpn=tlvh432ahttp://www.ti.com/product/tlvh432b?qgpn=tlvh432bhttp://www.go-dsp.com/forms/techdoc/doc_feedback.htm?litnum=SLVS555K&partnum=TLVH431

  • 3 REF

    2 ANODE

    1 CATHODE

    Not to scale

    Not to scale

    1 CATHODE

    2 ANODE

    3 REF

    3 CATHODE

    2 ANODE

    1 REF

    Not to scale

    1CATHODE 6 ANODE

    2NC 5 NC

    3REF 4 NC

    Not to scale

    1CATHODE

    2REF

    3 ANODE

    Not to scale

    1NC

    2*

    3CATHODE 4 REF

    5 ANODE

    Not to scale

    1REF

    2CATHODE

    3 ANODE

    Not to scale

    3

    TLVH431, TLVH431A, TLVH431BTLVH432, TLVH432A, TLVH432B

    www.ti.com SLVS555K NOVEMBER 2004REVISED SEPTEMBER 2016

    Product Folder Links: TLVH431 TLVH431A TLVH431B TLVH432 TLVH432A TLVH432B

    Submit Documentation FeedbackCopyright 20042016, Texas Instruments Incorporated

    5 Pin Configuration and Functions

    TLVH431 DBV Package5-Pin SOT-23

    Top View

    NC No internal connection* Pin 2 is attached to Substrate and mustbe connected to ANODE or left open.

    TLVH431 DCK Package6-Pin SC70Top View

    TLVH431 LP Package3-Pin TO-92

    Top View

    TLVH431 DBZ Package3-Pin SOT-23

    Top View

    TLVH432 DBZ Package3-Pin SOT-23

    Top View

    TLVH431 PK Package3-Pin SOT-89

    Top View

    TLVH432 PK Package3-Pin SOT-89

    Top View

    Pin FunctionsPIN

    TYPE DESCRIPTIONNAME

    TLVH431 TLVH432

    DBZ DBV LP DCK PK DBZ PK

    CATHODE 2 3 1 1 3 1 1 I/O Shunt Current/Voltage input

    REF 1 4 3 3 1 2 3 I Threshold relative to common anode

    ANODE 3 5 2 6 2 3 2 O Common pin, normally connected to ground

    NC 1 2, 4, 5 I No Internal Connection

    * 2 I Substrate Connection

    http://www.ti.com/product/tlvh431?qgpn=tlvh431http://www.ti.com/product/tlvh431a?qgpn=tlvh431ahttp://www.ti.com/product/tlvh431b?qgpn=tlvh431bhttp://www.ti.com/produ

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