Specifications
| Type | Description |
|---|---|
| Part Number | TL431ACDBZR |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package / Case | DBZ, SOT-23-3, 2.90 mm × 1.30 mm nominal |
| Reference Voltage Tolerance | 1% — A grade, TA=25°C |
| Adjustable Output Voltage Range | Vref to 36 V — set by two external resistors |
| Nominal Reference Voltage | approximately 2.5 V — general device description |
| Typical Output Impedance | 0.2 Ω — general device description |
| Sink Current Capability | 1 mA to 100 mA — operating capability |
| Operating Free-Air Temperature | 0°C to 70°C — TL43xxC commercial temperature grade |
| Cathode Pin | Pin 1 — TL431 DBZ SOT-23-3 package |
| Reference Pin | Pin 2 — TL431 DBZ SOT-23-3 package |
| Anode Pin | Pin 3 — TL431 DBZ SOT-23-3 package |
| Absolute Maximum Cathode Voltage | 37 V max — with respect to ANODE |
| Absolute Maximum Continuous Cathode Current | -100 mA to 150 mA — over operating free-air temperature range |
| Absolute Maximum Reference Input Current | -0.05 mA to 10 mA — over operating free-air temperature range |
| Operating Junction Temperature | 150°C max — absolute maximum rating |
| Storage Temperature Range | -65°C to 150°C — absolute maximum rating |
| ESD Rating HBM | ±2000 V — ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | ±1000 V — JEDEC JESD22-C101 |
| Junction-to-Ambient Thermal Resistance | 206°C/W — DBZ package, 3 pins |
| Junction-to-Case Thermal Resistance Top | 76°C/W — DBZ package, 3 pins |
| Recommended Cathode Voltage | Vref to 36 V — recommended operating conditions |
| Recommended Continuous Cathode Current | 1 mA to 100 mA — recommended operating conditions |
| Reference Voltage | 2470 mV min, 2495 mV typ, 2520 mV max — TL431AC/TL432AC, VKA=Vref, IKA=10 mA, TA=25°C |
| Reference Input Voltage Deviation | 6 mV typ, 16 mV max — TL431AC DBZ SOT-23-3, VKA=Vref, IKA=10 mA, over full temperature range |
| Reference Voltage Change Ratio | -1.4 mV/V typ, -2.7 mV/V max — TL431AC/TL432AC, ΔVKA=10 V - Vref, IKA=10 mA |
| Reference Voltage Change Ratio | -1 mV/V typ, -2 mV/V max — TL431AC/TL432AC, ΔVKA=36 V - 10 V, IKA=10 mA |
| Reference Input Current | 2 µA typ, 4 µA max — TL431AC/TL432AC, IKA=10 mA, R1=10 kΩ, R2=∞ |
| Reference Input Current Deviation | 0.4 µA typ, 1.2 µA max — TL431AC/TL432AC, IKA=10 mA, R1=10 kΩ, R2=∞, over full temperature range |
| Minimum Cathode Current for Regulation | 0.4 mA typ, 1 mA max — TL431AC/TL432AC, VKA=Vref |
| Off-State Cathode Current | 0.1 µA typ, 1 µA max — TL431AC/TL432AC, VKA=36 V, Vref=0 V |
| Dynamic Impedance | 0.2 Ω typ, 0.5 Ω max — TL431AC/TL432AC, VKA=Vref, f≤1 kHz, IKA=1 mA to 100 mA |
| Datasheet Status | request_only |
Product Overview
The TL431ACDBZR is a Texas Instruments precision programmable shunt reference categorized under Power_Management. Its general device description specifies an approximately 2.5 V nominal reference, 1% reference-voltage tolerance for the A grade at TA=25°C, and an adjustable output range from Vref to 36 V when set by two external resistors.
In the DBZ SOT-23-3 package, the device uses Pin 1 as cathode, Pin 2 as reference, and Pin 3 as anode. The package case is DBZ, SOT-23-3, with a nominal body size of 2.90 mm × 1.30 mm. Thermal data for this 3-pin DBZ package lists 206°C/W junction-to-ambient resistance and 76°C/W junction-to-case top resistance.
Operating recommendations include cathode voltage from Vref to 36 V and continuous cathode current from 1 mA to 100 mA. Electrical data includes 2470 mV minimum, 2495 mV typical, and 2520 mV maximum reference voltage at VKA=Vref, IKA=10 mA, TA=25°C. These parameters support voltage-reference, programmable shunt-regulation, and power-management reference-node applications.
Key Features
- 1% reference voltage tolerance at TA=25°C
- Adjustable output range from Vref to 36 V
- Approximately 2.5 V nominal reference voltage
- 1 mA to 100 mA sink current capability
- 0.2 Ω typical output impedance
- DBZ SOT-23-3 package with three pins
- 0°C to 70°C commercial free-air operation
- 37 V maximum cathode voltage rating
- ±2000 V HBM and ±1000 V CDM ESD ratings
- 206°C/W junction-to-ambient thermal resistance
- 2470 mV to 2520 mV reference voltage range
- 0.2 Ω typical dynamic impedance at f≤1 kHz
Typical Applications
- Programmable shunt reference circuits
- Adjustable voltage reference nodes
- Power-management regulation circuits
- Cathode-current regulation designs
- SOT-23-3 reference assemblies
- Commercial-temperature power circuits
Procurement Notes
When requesting a quote for TL431ACDBZR, 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 TL431ACDBZR?
TL431ACDBZR is a Texas Instruments precision programmable shunt reference in the Power_Management category. The extracted datasheet facts identify it as a Power_IC with an approximately 2.5 V nominal reference.
What package and pinout does TL431ACDBZR use?
The part uses the DBZ SOT-23-3 package, nominally 2.90 mm × 1.30 mm. For the TL431 DBZ package, Pin 1 is cathode, Pin 2 is reference, and Pin 3 is anode.
What voltage range can TL431ACDBZR regulate across?
The adjustable output voltage range is Vref to 36 V when set by two external resistors. The recommended cathode voltage range is also listed as Vref to 36 V.
What current range is recommended for TL431ACDBZR operation?
The recommended continuous cathode current range is 1 mA to 100 mA. The same 1 mA to 100 mA range is also listed as the device sink current capability.
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.