Specifications
| Type | Description |
|---|---|
| Part Number | ATL431 |
| Manufacturer | Texas Instruments |
| Product Type | Shunt regulator |
| Category | Power Management |
| Package / Case | DBZ 3-pin SOT-23 |
| Output Voltage Range | 2.5 V to 36 V; set with two external resistors |
| Reference Voltage | approximately 2.5 V |
| Reference Voltage Tolerance (A grade) | 1% at TA=25°C |
| Reference Voltage Tolerance (B grade) | 0.5% at TA=25°C |
| Cathode Current Range | 35 uA to 100 mA |
| Minimum Cathode Current for Regulation | 20 uA typ, 35 uA max |
| Dynamic Impedance | 0.05 ohm typ, 0.3 ohm max |
| Reference Input Current | 30 nA typ, 150 nA max |
| Operating Temperature (I grade) | -40°C to 85°C |
| Operating Temperature (Q grade) | -40°C to 125°C |
| Datasheet Status | request_only |
Product Overview
The Texas Instruments ATL431 is a Power_Management adjustable precision shunt regulator for adjustable shunt regulation applications. The ATL431 topology consists of a reference and open-collector output that can be set with two external resistors to regulate any output level from approximately 2.5 V to 36 V.
It is supplied in a DBZ 3-pin SOT-23 package with nominal body dimensions of 2.90 mm x 1.60 mm x 1.00 mm. The ATL431 DBZ pinout assigns pin 1 as CATHODE, pin 2 as REF, and pin 3 as ANODE. The ATL432 variant assigns pin 1 as REF, pin 2 as CATHODE, and pin 3 as ANODE.
Electrical characteristics include an approximate 2.5 V nominal reference voltage at IKA=1 mA, TA=25°C, with A grade and B grade tolerance options of 1% and 0.5% respectively. The device supports 35 uA to 100 mA cathode current, 20 uA typical minimum current for regulation, dynamic impedance of 0.05 ohm typical and 0.3 ohm maximum, and 150 nA maximum reference input current.
Key Features
- 2.5 V to 36 V output range
- Approximately 2.5 V reference
- 0.5% B-grade tolerance
- 1% A-grade tolerance
- 35 uA to 100 mA cathode current
- 20 uA typ minimum cathode current
- 0.05 ohm typical impedance
- 150 nA max reference current
- DBZ 3-pin SOT-23 package
Typical Applications
- Adjustable shunt regulation
- Resistor-set voltage regulation
- Power management reference nodes
- Low-current regulation circuits
- SOT-23 board assemblies
Procurement Notes
When requesting a quote for ATL431, 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 output range can the ATL431 regulate?
The ATL431 regulated output voltage range is 2.5 V to 36 V, set with two external resistors.
What package is ATL431 available in?
DBZ 3-pin SOT-23, 2.90 mm x 1.60 mm x 1.00 mm.
What cathode current range is recommended?
35 uA to 100 mA. Minimum cathode current for regulation is 20 uA typical.
What tolerance options are available?
A grade (1%) and B grade (0.5%) at TA=25°C.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 19, 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.