Datasheet TLVH431B-EP (Texas Instruments)
| 制造商 | Texas Instruments |
| 描述 | Enhanced-plastic 0.5% low-voltage wide-operating-current adjustable precision shunt regulator |
| 页数 / 页 | 29 / 1 — TLVH431B-EP. TLVH431B-EP Enhanced Plastic 0.5% Low-Voltage Wide-Operating … |
| 文件格式/大小 | PDF / 1.3 Mb |
| 文件语言 | 英语 |
TLVH431B-EP. TLVH431B-EP Enhanced Plastic 0.5% Low-Voltage Wide-Operating Current. Adjustable Precision Shunt Regulator
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TLVH431B-EP
SLVSFF4 – DECEMBER 2019
TLVH431B-EP Enhanced Plastic 0.5% Low-Voltage Wide-Operating Current Adjustable Precision Shunt Regulator 1 Features 3 Description
• Low-voltage operation: down to 1.24 V The TLVH431B-EP device is a low-voltage, 3- 1 terminal, adjustable voltage reference with specified • Reference voltage tolerances 0.5% at 25°C thermal stability over applicable industrial and • Adjustable output voltage, VO = VREF to 18 V commercial temperature ranges. Output voltage can • Wide operating cathode current range: be set to any value between VREF (1.24 V) and 18 V 200 μA to 70 mA with two external resistors (see Figure 24). This device operates from a lower voltage (1.24 V) than • 0.25-Ω typical output impedance the widely used TL431 and TL1431 shunt-regulator • Supports defense and aerospace applications: references. – Controlled baseline When used with an optocoupler, the TLVH431B-EP – Available in extended (–55°C to 125°C) device is ideal for voltage references in isolated temperature range feedback circuits designed for 3-V to 3.3-V switching- – Extended product life cycle mode power supplies. It has a typical output impedance of 0.25 Ω. Active output circuitry provides – Extended product-change notification a very sharp turn-on characteristic, making the – Product traceability TLVH431B-EP device an excellent replacement for low-voltage Zener diodes in many applications,
2 Applications
including on-board regulation and adjustable power supplies. • Adjustable voltage and current referencing • Secondary side regulation in flyback SMPSs
Device Information(1)
• Zener replacement
PART NUMBER PACKAGE BODY SIZE (NOM)
• Voltage monitoring TLVH431BMDBZREP SOT-23 (3) 2.92 mm × 1.30 mm • Comparator with integrated reference (1) For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Schematic Input VO IK 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 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics 6.6 Typical Characteristics 7 Parameter Measurement Information 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.4 Device Functional Modes 8.4.1 Open Loop (Comparator) 8.4.2 Closed Loop 9 Applications and Implementation 9.1 Application Information 9.2 Typical Applications 9.2.1 Comparator With Integrated Reference (Open Loop) 9.2.1.1 Design Requirements 9.2.1.2 Detailed Design Procedure 9.2.1.3 Application Curves 9.2.2 Shunt Regulator/Reference 9.2.2.1 Design Requirements 9.2.2.2 Detailed Design Procedure 9.2.2.3 Application Curve 10 Power Supply Recommendations 11 Layout 11.1 Layout Guidelines 11.2 Layout Example 12 Device and Documentation Support 12.1 Documentation Support 12.1.1 Related Documentation 12.2 Receiving Notification of Documentation Updates 12.3 Support Resources 12.4 Trademarks 12.5 Electrostatic Discharge Caution 12.6 Glossary 13 Mechanical, Packaging, and Orderable Information
TLVH431B-EP
SLVSFF4 – DECEMBER 2019
TLVH431B-EP Enhanced Plastic 0.5% Low-Voltage Wide-Operating Current Adjustable Precision Shunt Regulator 1 Features 3 Description
• Low-voltage operation: down to 1.24 V The TLVH431B-EP device is a low-voltage, 3- 1 terminal, adjustable voltage reference with specified • Reference voltage tolerances 0.5% at 25°C thermal stability over applicable industrial and • Adjustable output voltage, VO = VREF to 18 V commercial temperature ranges. Output voltage can • Wide operating cathode current range: be set to any value between VREF (1.24 V) and 18 V 200 μA to 70 mA with two external resistors (see Figure 24). This device operates from a lower voltage (1.24 V) than • 0.25-Ω typical output impedance the widely used TL431 and TL1431 shunt-regulator • Supports defense and aerospace applications: references. – Controlled baseline When used with an optocoupler, the TLVH431B-EP – Available in extended (–55°C to 125°C) device is ideal for voltage references in isolated temperature range feedback circuits designed for 3-V to 3.3-V switching- – Extended product life cycle mode power supplies. It has a typical output impedance of 0.25 Ω. Active output circuitry provides – Extended product-change notification a very sharp turn-on characteristic, making the – Product traceability TLVH431B-EP device an excellent replacement for low-voltage Zener diodes in many applications,
2 Applications
including on-board regulation and adjustable power supplies. • Adjustable voltage and current referencing • Secondary side regulation in flyback SMPSs
Device Information(1)
• Zener replacement
PART NUMBER PACKAGE BODY SIZE (NOM)
• Voltage monitoring TLVH431BMDBZREP SOT-23 (3) 2.92 mm × 1.30 mm • Comparator with integrated reference (1) For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Schematic Input VO IK 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 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics 6.6 Typical Characteristics 7 Parameter Measurement Information 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.4 Device Functional Modes 8.4.1 Open Loop (Comparator) 8.4.2 Closed Loop 9 Applications and Implementation 9.1 Application Information 9.2 Typical Applications 9.2.1 Comparator With Integrated Reference (Open Loop) 9.2.1.1 Design Requirements 9.2.1.2 Detailed Design Procedure 9.2.1.3 Application Curves 9.2.2 Shunt Regulator/Reference 9.2.2.1 Design Requirements 9.2.2.2 Detailed Design Procedure 9.2.2.3 Application Curve 10 Power Supply Recommendations 11 Layout 11.1 Layout Guidelines 11.2 Layout Example 12 Device and Documentation Support 12.1 Documentation Support 12.1.1 Related Documentation 12.2 Receiving Notification of Documentation Updates 12.3 Support Resources 12.4 Trademarks 12.5 Electrostatic Discharge Caution 12.6 Glossary 13 Mechanical, Packaging, and Orderable Information