Specifications
| Type | Description |
|---|---|
| Part Number | TL431BIDBZR |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | SOT-23-3 (DBZ), 2.90 mm x 1.30 mm nominal |
| Reference Voltage Tolerance Grade | 0.5% at B grade, TA=25°C |
| Adjustable Output Voltage Range | Vref to 36 V, set with two external resistors |
| Nominal Reference Voltage | approximately 2.5 V |
| Operating Free-Air Temperature | -40°C to 85°C for TL43xxI temperature grade |
| Typical Temperature Drift | 14 mV for TL43xB, I temperature range |
| Typical Output Impedance | 0.2 ohm |
| Sink Current Capability | 1 mA to 100 mA |
| Cathode Voltage Absolute Maximum | 37 V with respect to anode |
| Continuous Cathode Current Absolute Maximum Range | -100 mA to 150 mA |
| Reference Input Current Absolute Maximum | -0.05 mA to 10 mA |
| Operating Junction Temperature Absolute Maximum | 150°C |
| Storage Temperature Range | -65°C to 150°C |
| 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 Top Thermal Resistance | 76°C/W, DBZ package, 3 pins |
| Recommended Cathode Voltage | Vref to 36 V |
| Recommended Continuous Cathode Current | 1 mA to 100 mA |
| Reference Voltage | 2440 mV min, 2495 mV typ, 2550 mV max; VKA=Vref, IKA=10 mA, TA=25°C |
| Reference Voltage Deviation Over Temperature | 14 mV typ, 34 mV max; SOT-23-3 and TL432 devices, VKA=Vref, IKA=10 mA |
| Reference Voltage Deviation Over Temperature | 5 mV typ, 50 mV max; all other devices, VKA=Vref, IKA=10 mA |
| Ratio of Reference Voltage Change to Cathode Voltage Change | -1.4 mV/V typ, -2.7 mV/V max; IKA=10 mA, delta VKA=10 V - Vref |
| Ratio of Reference Voltage Change to Cathode Voltage Change | -1 mV/V typ, -2 mV/V max; IKA=10 mA, delta VKA=36 V - 10 V |
| Reference Input Current | 2 uA typ, 4 uA max; IKA=10 mA, R1=10 kohm, R2=infinity |
| Reference Input Current Deviation Over Temperature | 0.8 uA typ, 2.5 uA max; IKA=10 mA, R1=10 kohm, R2=infinity |
| Minimum Cathode Current for Regulation | 0.4 mA typ, 1 mA max; VKA=Vref |
| Off-State Cathode Current | 0.1 uA typ, 1 uA max; VKA=36 V, Vref=0 V |
| Dynamic Impedance | 0.2 ohm typ, 0.5 ohm max; VKA=Vref, f<=1 kHz, IKA=1 mA to 100 mA |
| DBZ Pin 1 Function | Cathode |
| DBZ Pin 2 Function | REF |
| DBZ Pin 3 Function | Anode |
| Datasheet Status | request_only |
Product Overview
TL431BIDBZR is a Texas Instruments precision programmable shunt regulator for Power_Management designs. The device has an approximately 2.5 V nominal reference and can be set from Vref to 36 V with two external resistors. For the B grade, the reference voltage tolerance is 0.5% at TA=25°C.
Key Features
- 0.5% B-grade reference tolerance at TA=25°C
- Adjustable from Vref to 36 V using two resistors
- Approximately 2.5 V nominal reference voltage
- 1 mA to 100 mA recommended cathode current
- 0.2 ohm typical dynamic output impedance
- -40°C to 85°C operating free-air temperature
- 37 V cathode voltage absolute maximum
- SOT-23-3 DBZ package with cathode, REF, anode pins
- HBM ±2000 V and CDM ±1000 V ESD ratings
Typical Applications
- Programmable shunt regulation
- Adjustable voltage reference circuits
- Power-management reference nodes
- Cathode-current regulation from 1 mA to 100 mA
- Vref-to-36 V adjustable outputs
- SOT-23-3 space-constrained assemblies
Procurement Notes
When requesting a quote for TL431BIDBZR, 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 TL431BIDBZR?
TL431BIDBZR is a Texas Instruments precision programmable shunt regulator in the Power_Management category. It uses an approximately 2.5 V nominal reference and supports adjustable operation from Vref to 36 V with two external resistors.
What package and pin functions does TL431BIDBZR use?
TL431BIDBZR is supplied in the SOT-23-3 DBZ package, with nominal dimensions of 2.90 mm x 1.30 mm. For the TL431x DBZ package, pin 1 is Cathode, pin 2 is REF, and pin 3 is Anode.
What cathode current range is recommended for TL431BIDBZR?
The recommended continuous cathode current range is 1 mA to 100 mA. The electrical data also lists minimum cathode current for regulation as 0.4 mA typical and 1 mA maximum when VKA equals Vref.
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.