Datasheet TLV431, TLV431A, TLV431B (Texas Instruments)
| Fabricante | Texas Instruments |
| Descripción | TLV431x Low-Voltage Adjustable Precision Shunt Regulator |
| Páginas / Página | 55 / 1 — TLV431. , TLV431A,. TLV431B. TLV431x Low-Voltage Adjustable Precision … |
| Revisión | X |
| Formato / tamaño de archivo | PDF / 2.2 Mb |
| Idioma del documento | Inglés |
TLV431. , TLV431A,. TLV431B. TLV431x Low-Voltage Adjustable Precision Shunt Regulator. 1 Features. 3 Description
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TLV431 , TLV431A, TLV431B
SLVS139W – JULY 1996 – REVISED MARCH 2018
TLV431x Low-Voltage Adjustable Precision Shunt Regulator 1 Features 3 Description
• Low-Voltage Operation, V The TLV431 device is a low-voltage 3-terminal 1 REF = 1.24 V adjustable voltage reference with specified thermal • Adjustable Output Voltage, VO = VREF to 6 V stability over applicable industrial and commercial • Reference Voltage Tolerances at 25°C temperature ranges. Output voltage can be set to any – 0.5% for TLV431B value between VREF (1.24 V) and 6 V with two external resistors (see the Parameter Measurement – 1% for TLV431A Information section). These devices operate from a – 1.5% for TLV431 lower voltage (1.24 V) than the widely used TL431 • Typical Temperature Drift and TL1431 shunt-regulator references. – 4 mV (0°C to 70°C) When used with an optocoupler, the TLV431 device – 6 mV (–40°C to 85°C) is an ideal voltage reference in isolated feedback circuits for 3-V to 3.3-V switching-mode power – 11 mV (–40°C to 125°C) supplies. These devices have a typical output • Low Operational Cathode Current, 80 µA Typical impedance of 0.25 Ω. Active output circuitry provides • 0.25-Ω Typical Output Impedance a very sharp turnon characteristic, making them • Ultra-Small SC-70 Package Offers 40% Smaller excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation Footprint Than SOT-23-3 and adjustable power supplies. • See TLVH431 and TLVH432 for: – Wider VKA (1.24 V to 18 V) and IK (80 mA)
Device Information(1)
– Additional SOT-89 Package
PART NUMBER PACKAGE (PIN) BODY SIZE (NOM)
– Multiple Pinouts for SOT-23-3 and SOT-89 SOT-23 (3) 2.90 mm × 1.30 mm Packages SOT-23 (5) 2.90 mm × 1.60 mm • On Products Compliant to MIL-PRF-38535, TLV431x SC70 (6) 2.00 mm × 1.25 mm All Parameters Are Tested Unless Otherwise TO-92 (3) 4.30 mm × 4.30 mm Noted. On All Other Products, Production SOIC (8) 4.90 mm × 3.90 mm Processing Does Not Necessarily Include Testing (1) For all available packages, see the orderable addendum at of All Parameters. the end of the data sheet.
2 Applications Simplified Schematic Input VO
• Adjustable Voltage and Current Referencing
IK
• Secondary Side Regulation in Flyback SMPSs • Zener Replacement • Voltage Monitoring • Comparator With Integrated Reference
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 for TLV431 6.6 Electrical Characteristics for TLV431A 6.7 Electrical Characteristics for TLV431B 6.8 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 Related Links 12.3 Receiving Notification of Documentation Updates 12.4 Community Resources 12.5 Trademarks 12.6 Electrostatic Discharge Caution 12.7 Glossary 13 Mechanical, Packaging, and Orderable Information
TLV431 , TLV431A, TLV431B
SLVS139W – JULY 1996 – REVISED MARCH 2018
TLV431x Low-Voltage Adjustable Precision Shunt Regulator 1 Features 3 Description
• Low-Voltage Operation, V The TLV431 device is a low-voltage 3-terminal 1 REF = 1.24 V adjustable voltage reference with specified thermal • Adjustable Output Voltage, VO = VREF to 6 V stability over applicable industrial and commercial • Reference Voltage Tolerances at 25°C temperature ranges. Output voltage can be set to any – 0.5% for TLV431B value between VREF (1.24 V) and 6 V with two external resistors (see the Parameter Measurement – 1% for TLV431A Information section). These devices operate from a – 1.5% for TLV431 lower voltage (1.24 V) than the widely used TL431 • Typical Temperature Drift and TL1431 shunt-regulator references. – 4 mV (0°C to 70°C) When used with an optocoupler, the TLV431 device – 6 mV (–40°C to 85°C) is an ideal voltage reference in isolated feedback circuits for 3-V to 3.3-V switching-mode power – 11 mV (–40°C to 125°C) supplies. These devices have a typical output • Low Operational Cathode Current, 80 µA Typical impedance of 0.25 Ω. Active output circuitry provides • 0.25-Ω Typical Output Impedance a very sharp turnon characteristic, making them • Ultra-Small SC-70 Package Offers 40% Smaller excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation Footprint Than SOT-23-3 and adjustable power supplies. • See TLVH431 and TLVH432 for: – Wider VKA (1.24 V to 18 V) and IK (80 mA)
Device Information(1)
– Additional SOT-89 Package
PART NUMBER PACKAGE (PIN) BODY SIZE (NOM)
– Multiple Pinouts for SOT-23-3 and SOT-89 SOT-23 (3) 2.90 mm × 1.30 mm Packages SOT-23 (5) 2.90 mm × 1.60 mm • On Products Compliant to MIL-PRF-38535, TLV431x SC70 (6) 2.00 mm × 1.25 mm All Parameters Are Tested Unless Otherwise TO-92 (3) 4.30 mm × 4.30 mm Noted. On All Other Products, Production SOIC (8) 4.90 mm × 3.90 mm Processing Does Not Necessarily Include Testing (1) For all available packages, see the orderable addendum at of All Parameters. the end of the data sheet.
2 Applications Simplified Schematic Input VO
• Adjustable Voltage and Current Referencing
IK
• Secondary Side Regulation in Flyback SMPSs • Zener Replacement • Voltage Monitoring • Comparator With Integrated Reference
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 for TLV431 6.6 Electrical Characteristics for TLV431A 6.7 Electrical Characteristics for TLV431B 6.8 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 Related Links 12.3 Receiving Notification of Documentation Updates 12.4 Community Resources 12.5 Trademarks 12.6 Electrostatic Discharge Caution 12.7 Glossary 13 Mechanical, Packaging, and Orderable Information