Specifications
| Type | Description |
|---|---|
| Part Number | TLV431 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package Case | DBZ (SOT-23-3) 2.92mm x 2.37mm; DBV (SOT-23-5) 2.90mm x 2.8mm; LP (TO-92-3) 5.2mm x 3.68mm; PK (SOT-89-3) 4.5mm x 4.095mm; D (SOIC-8) 4.9mm x 6mm; DCK (SC-70-6) 2mm x 1.5mm |
| Reference Voltage | 1.24 V; Nominal VREF |
| Adjustable Output Voltage Range | VREF to 6 V; Set with two external resistors |
| Reference Voltage Tolerance | 0.5%; TLV431B, TA=25°C |
| Reference Voltage Tolerance | 1%; TLV431A, TA=25°C |
| Reference Voltage Tolerance | 1.5%; TLV431, TA=25°C |
| Typical Temperature Drift | 4 mV; TA=0°C to 70°C |
| Typical Temperature Drift | 6 mV; TA=-40°C to 85°C |
| Typical Temperature Drift | 11 mV; TA=-40°C to 125°C |
| Operational Cathode Current | 80 µA typ; Low operational cathode current |
| Output Impedance | 0.25 ohm typ; Typical output impedance |
| Cathode Pin Function | Shunt current/voltage input; CATHODE pin |
| REF Pin Function | Threshold relative to common anode; REF pin |
| ANODE Pin Function | Common pin, normally connected to ground; ANODE pin |
| Cathode Voltage Absolute Maximum | 7 V max; voltage with respect to anode |
| Continuous Cathode Current Absolute Maximum | -20 mA min, 20 mA max |
| Reference Current Absolute Maximum | -0.05 mA min, 3 mA max |
| Operating Virtual Junction Temperature | 150°C max; Absolute maximum rating |
| Storage Temperature | -65°C to 150°C; Absolute maximum rating |
| ESD Rating HBM | +/-2000 V; Human body model, ANSI/ESDA/JEDEC JS-001, all pins |
| ESD Rating CDM | +/-1000 V; Charged device model, JEDEC JESD22-C101, all pins |
| Recommended Cathode Voltage | VREF to 6 V; Over operating free-air temperature range |
| Recommended Cathode Current | 0.1 mA to 15 mA; Over operating free-air temperature range |
| Operating Free-Air Temperature | 0°C to 70°C; TLV431_C grade |
| Operating Free-Air Temperature | -40°C to 85°C; TLV431_I grade |
| Operating Free-Air Temperature | -40°C to 125°C; TLV431_Q grade |
| Junction-to-Ambient Thermal Resistance | 87°C/W; DCK package, 6 pins |
| Junction-to-Ambient Thermal Resistance | 97°C/W; D package, 8 pins |
| Junction-to-Ambient Thermal Resistance | 52°C/W; PK package, 3 pins |
| Junction-to-Ambient Thermal Resistance | 206°C/W; DBV package, 5 pins |
| Junction-to-Ambient Thermal Resistance | 206°C/W; DBZ package, 3 pins |
| Junction-to-Ambient Thermal Resistance | 140°C/W; LP package, 3 pins |
| Junction-to-Case Top Thermal Resistance | 259°C/W; DCK package, 6 pins |
| Junction-to-Case Top Thermal Resistance | 39°C/W; D package, 8 pins |
| Junction-to-Case Top Thermal Resistance | 9°C/W; PK package, 3 pins |
| Junction-to-Case Top Thermal Resistance | 131°C/W; DBV package, 5 pins |
| Junction-to-Case Top Thermal Resistance | 76°C/W; DBZ package, 3 pins |
| Junction-to-Case Top Thermal Resistance | 55°C/W; LP package, 3 pins |
| Reference Voltage | 1.222 V min, 1.24 V typ, 1.258 V max; TLV431, TA=25°C, VKA=VREF, IK=10mA |
| Reference Voltage | 1.21 V min, 1.27 V max; TLV431C, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage | 1.202 V min, 1.278 V max; TLV431I, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage | 1.194 V min, 1.286 V max; TLV431Q, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage Deviation | 4 mV typ, 12 mV max; TLV431C, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage Deviation | 6 mV typ, 20 mV max; TLV431I, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage Deviation | 11 mV typ, 31 mV max; TLV431Q, full temperature range, VKA=VREF, IK=10mA |
| Ratio of Reference Voltage Change to Cathode Voltage Change | -1.5 mV/V typ, -2.7 mV/V max; TLV431, VKA=VREF to 6V, IK=10mA |
| Reference Terminal Current | 0.15 µA typ, 0.5 µA max; TLV431, IK=10mA, R1=10kohm, R2=open |
| Reference Current Deviation | 0.05 µA typ, 0.3 µA max; TLV431C, full temperature range, IK=10mA, R1=10kohm, R2=open |
| Reference Current Deviation | 0.1 µA typ, 0.4 µA max; TLV431I, full temperature range, IK=10mA, R1=10kohm, R2=open |
| Reference Current Deviation | 0.15 µA typ, 0.5 µA max; TLV431Q, full temperature range, IK=10mA, R1=10kohm, R2=open |
| Minimum Cathode Current for Regulation | 55 µA typ, 80 µA max; TLV431C/I, VKA=VREF |
| Minimum Cathode Current for Regulation | 55 µA typ, 100 µA max; TLV431Q, VKA=VREF |
| Off-State Cathode Current | 0.001 µA typ, 0.1 µA max; TLV431, VREF=0, VKA=6V |
| Dynamic Impedance | 0.25 ohm typ, 0.4 ohm max; TLV431, VKA=VREF, f<=1kHz, IK=0.1mA to 15mA |
| Reference Voltage | 1.228 V min, 1.24 V typ, 1.252 V max; TLV431A, TA=25°C, VKA=VREF, IK=10mA |
| Reference Voltage | 1.221 V min, 1.259 V max; TLV431AC, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage | 1.215 V min, 1.265 V max; TLV431AI, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage | 1.209 V min, 1.271 V max; TLV431AQ, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage Deviation | 4 mV typ, 12 mV max; TLV431AC, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage Deviation | 6 mV typ, 20 mV max; TLV431AI, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage Deviation | 11 mV typ, 31 mV max; TLV431AQ, full temperature range, VKA=VREF, IK=10mA |
| Ratio of Reference Voltage Change to Cathode Voltage Change | -1.5 mV/V typ, -2.7 mV/V max; TLV431A, VKA=VREF to 6V, IK=10mA |
| Reference Terminal Current | 0.15 µA typ, 0.5 µA max; TLV431A, IK=10mA, R1=10kohm, R2=open |
| Minimum Cathode Current for Regulation | 55 µA typ, 80 µA max; TLV431AC/AI, VKA=VREF |
| Minimum Cathode Current for Regulation | 55 µA typ, 100 µA max; TLV431AQ, VKA=VREF |
| Off-State Cathode Current | 0.001 µA typ, 0.1 µA max; TLV431A, VREF=0, VKA=6V |
| Dynamic Impedance | 0.25 ohm typ, 0.4 ohm max; TLV431A, VKA=VREF, f<=1kHz, IK=0.1mA to 15mA |
| Reference Voltage | 1.234 V min, 1.24 V typ, 1.246 V max; TLV431B, TA=25°C, VKA=VREF, IK=10mA |
| Reference Voltage | 1.227 V min, 1.253 V max; TLV431BC, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage | 1.224 V min, 1.259 V max; TLV431BI, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage | 1.221 V min, 1.265 V max; TLV431BQ, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage Deviation | 4 mV typ, 12 mV max; TLV431BC, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage Deviation | 6 mV typ, 20 mV max; TLV431BI, full temperature range, VKA=VREF, IK=10mA |
| Reference Voltage Deviation | 11 mV typ, 31 mV max; TLV431BQ, full temperature range, VKA=VREF, IK=10mA |
| Ratio of Reference Voltage Change to Cathode Voltage Change | -1.5 mV/V typ, -2.7 mV/V max; TLV431B, VKA=VREF to 6V, IK=10mA |
| Reference Terminal Current | 0.1 µA typ, 0.5 µA max; TLV431B, IK=10mA, R1=10kohm, R2=open |
| Minimum Cathode Current for Regulation | 55 µA typ, 100 µA max; TLV431B, VKA=VREF |
| Off-State Cathode Current | 0.001 µA typ, 0.1 µA max; TLV431B, VREF=0, VKA=6V |
| Dynamic Impedance | 0.25 ohm typ, 0.4 ohm max; TLV431B, VKA=VREF, f<=1kHz, IK=0.1mA to 15mA |
| Datasheet Status | request_only |
Product Overview
The TLV431 is a Texas Instruments adjustable precision shunt regulator built around a nominal 1.24 V reference. Its cathode output can be adjusted from VREF to 6 V using two external resistors, supporting shunt-regulator and adjustable-reference functions within Power_Management designs.
Accuracy options include TLV431B at 0.5%, TLV431A at 1%, and TLV431 at 1.5% reference voltage tolerance at TA=25°C. The device specifies low operational cathode current at 80 µA typical, dynamic impedance of 0.25 ohm typical and 0.4 ohm maximum, and recommended cathode operation from 0.1 mA to 15 mA.
Pin functions are defined as CATHODE for shunt current or voltage input, REF as the threshold relative to the common anode, and ANODE as the common pin normally connected to ground. Available packages include SOT-23-3, SOT-23-5, TO-92-3, SOT-89-3, SOIC-8, and SC-70-6, with junction-to-ambient thermal resistance values ranging from 52°C/W to 206°C/W depending on package.
Key Features
- 1.24 V nominal reference voltage
- Adjustable VREF to 6 V cathode output
- 0.5% TLV431B reference tolerance at 25°C
- 80 µA typical operational cathode current
- 0.25 ohm typical output impedance
- 0.1 mA to 15 mA recommended cathode current
- Off-state cathode current 0.001 µA typical
- Dynamic impedance 0.25 ohm typical, 0.4 ohm maximum
- HBM ESD rating +/-2000 V on all pins
- Operating grades cover 0°C to 70°C, -40°C to 85°C, and -40°C to 125°C
Typical Applications
- Adjustable shunt regulation
- 1.24 V reference circuits
- VREF to 6 V outputs
- Low cathode-current regulation
- Ground-referenced threshold sensing
- Power management reference nodes
- Temperature-graded regulator designs
Procurement Notes
When requesting a quote for TLV431, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What type of device is the TLV431?
The TLV431 is an adjustable precision shunt regulator from Texas Instruments. It uses a nominal 1.24 V reference and can set an output range from VREF to 6 V with two external resistors.
What cathode current range is recommended for TLV431 operation?
The recommended cathode current range is 0.1 mA to 15 mA over the operating free-air temperature range. The device also specifies minimum cathode current for regulation values of 55 µA typical with grade-dependent maximum limits.
Which package options are listed for the TLV431?
Listed package options include DBZ SOT-23-3, DBV SOT-23-5, LP TO-92-3, PK SOT-89-3, D SOIC-8, and DCK SC-70-6, with package dimensions provided for each case.
How accurate is the TLV431 reference voltage?
Reference tolerance depends on the option. TLV431B is specified at 0.5%, TLV431A at 1%, and TLV431 at 1.5% at TA=25°C. Each option is centered on a 1.24 V typical reference voltage.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.