Specifications
| Type | Description |
|---|---|
| Part Number | TLV431B |
| 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; PK (SOT-89-3) 4.5mm x 4.095mm; LP (TO-92-3) 5.2mm x 3.68mm; DCK (SC-70-6) 2mm x 1.5mm |
| Reference Voltage | 1.234 V min, 1.24 V typ, 1.246 V max; TLV431B, VKA=VREF, IK=10mA, TA=25°C |
| Reference Voltage Tolerance | 0.5%; TLV431B, TA=25°C |
| Reference Voltage | 1.227 V min, 1.253 V max; TLV431BC, VKA=VREF, IK=10mA, TA=full range |
| Reference Voltage | 1.224 V min, 1.259 V max; TLV431BI, VKA=VREF, IK=10mA, TA=full range |
| Reference Voltage | 1.221 V min, 1.265 V max; TLV431BQ, VKA=VREF, IK=10mA, TA=full range |
| Adjustable Output Voltage Range | VREF to 6 V; with external resistors |
| Low-Voltage Operation | VREF = 1.24 V; device reference voltage |
| Reference Voltage Deviation | 4 mV typ, 12 mV max; TLV431BC, VKA=VREF, IK=10mA, full temperature range |
| Reference Voltage Deviation | 6 mV typ, 20 mV max; TLV431BI, VKA=VREF, IK=10mA, full temperature range |
| Reference Voltage Deviation | 11 mV typ, 31 mV max; TLV431BQ, VKA=VREF, IK=10mA, full temperature range |
| Ratio of Reference Voltage Change to Cathode Voltage Change | -1.5 mV/V typ, -2.7 mV/V max; VKA=VREF to 6V, IK=10mA |
| Reference Terminal Current | 0.1 µA typ, 0.5 µA max; IK=10mA, R1=10kΩ, R2=open |
| Reference Current Deviation | 0.05 µA typ, 0.3 µA max; TLV431BC, IK=10mA, R1=10kΩ, R2=open, full temperature range |
| Reference Current Deviation | 0.1 µA typ, 0.4 µA max; TLV431BI, IK=10mA, R1=10kΩ, R2=open, full temperature range |
| Reference Current Deviation | 0.15 µA typ, 0.5 µA max; TLV431BQ, IK=10mA, R1=10kΩ, R2=open, full temperature range |
| Minimum Cathode Current for Regulation | 55 µA typ, 100 µA max; VKA=VREF |
| Off-State Cathode Current | 0.001 µA typ, 0.1 µA max; VREF=0, VKA=6V |
| Dynamic Impedance | 0.25 Ω typ, 0.4 Ω max; VKA=VREF, f≤1kHz, IK=0.1mA to 15mA |
| Recommended Cathode Voltage | VREF min, 6 V max; operating free-air temperature range |
| Recommended Cathode Current | 0.1 mA min, 15 mA max; 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 |
| Absolute Maximum Cathode Voltage | 7 V max; voltage with respect to anode terminal |
| Absolute Maximum Continuous Cathode Current | -20 mA min, 20 mA max; over operating free-air temperature range |
| Absolute Maximum Reference Current | -0.05 mA min, 3 mA max; over operating free-air temperature range |
| 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 per ANSI/ESDA/JEDEC JS-001, all pins |
| ESD Rating CDM | ±1000 V; charged device model per JEDEC JESD22-C101, all pins |
| 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 |
| Cathode Pin | DBZ pin 2, DBV pin 3, PK pin 3, D pin 1, LP pin 1, DCK pin 1; pin functions table |
| Reference Pin | DBZ pin 1, DBV pin 4, PK pin 1, D pin 8, LP pin 3, DCK pin 3; pin functions table |
| Anode Pin | DBZ pin 3, DBV pin 5, PK pin 2, D pins 2/3/6/7, LP pin 2, DCK pin 6; pin functions table |
| Datasheet Status | request_only |
Product Overview
The TLV431B is a Texas Instruments adjustable precision shunt regulator for Power_Management circuits. Its device reference voltage is 1.24 V typical, with the TLV431B specified at 1.234 V minimum, 1.24 V typical, and 1.246 V maximum when VKA equals VREF, IK is 10 mA, and TA is 25°C. The TLV431B reference-voltage tolerance is 0.5% at 25°C.
With external resistors, the adjustable output voltage range extends from VREF to 6 V. Recommended operating conditions specify cathode voltage from VREF to 6 V and cathode current from 0.1 mA to 15 mA. Electrical characteristics include 55 µA typical minimum cathode current for regulation, 0.001 µA typical off-state cathode current, and 0.25 Ω typical dynamic impedance.
Package options include DBZ, DBV, PK, LP, and DCK cases, with package-specific thermal resistance values and pin assignments for cathode, reference, and anode terminals. Temperature grades cover 0°C to 70°C, -40°C to 85°C, and -40°C to 125°C operating free-air ranges.
Key Features
- Adjustable precision shunt regulator device type
- 1.24 V typical device reference voltage
- 0.5% reference-voltage tolerance at 25°C
- Adjustable output from VREF to 6 V
- 0.1 mA to 15 mA recommended cathode current
- 55 µA typical minimum cathode current for regulation
- 0.001 µA typical off-state cathode current
- 0.25 Ω typical dynamic impedance at f≤1kHz
- HBM ESD rating of ±2000 V on all pins
- CDM ESD rating of ±1000 V on all pins
Typical Applications
- Adjustable shunt regulator circuits
- Low-voltage reference circuits
- External-resistor output setting
- Cathode-current regulated power circuits
- Temperature-grade power-management designs
- SOT-23 and SC-70 assemblies
Procurement Notes
When requesting a quote for TLV431B, 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 TLV431B?
The TLV431B is an adjustable precision shunt regulator from Texas Instruments. It is categorized under Power_Management and supports adjustable output operation from VREF to 6 V when used with external resistors.
What is the TLV431B reference voltage specification?
For TLV431B at VKA=VREF, IK=10 mA, and TA=25°C, the reference voltage is specified as 1.234 V minimum, 1.24 V typical, and 1.246 V maximum.
What cathode current range is recommended for operation?
The recommended cathode current range is 0.1 mA minimum to 15 mA maximum over the operating free-air temperature range. The minimum cathode current for regulation is specified as 55 µA typical and 100 µA maximum.
Which packages are listed for the TLV431B family?
The listed package cases include DBZ SOT-23-3, DBV SOT-23-5, PK SOT-89-3, LP TO-92-3, and DCK SC-70-6, with package dimensions provided for each case.
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.