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TL431BQDBZR
VREF SHUNT REGULATOR ADJ 0.5% SOT23-3
Texas Instruments
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Design a Custom BoardAbout This Component
Precision programmable shunt regulator with 0.5% initial accuracy and adjustable output voltage from 2.5V to 36V using two external resistors. Offers low output impedance (0.2Ω typical) and sink-current capability from 1mA to 100mA with tight temperature stability (6mV typical drift). Ideal for on-board regulation, power supplies, and replacing Zener diodes in switching power supply applications.
Package: SOT-23-3 · 3 pins
Why does this need a breakout?
SOT-23's tiny 0.95mm pin pitch and compact form factor make hand-soldering tedious and prone to bridging errors. A breakout board breaks out the three pins to standard 0.1" spacing for breadboard prototyping, eliminating the need for specialized soldering equipment and enabling fast circuit iteration with transistors, diodes, and small-signal components.
Specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | Texas Instruments |
| Part Number | TL431BQDBZR |
| Package | SOT-23-3 |
| Pin Count | 3 |
| Current - Output | 100 mA |
| Output Type | Adjustable |
| Voltage - Output (Max) | 36 V |
| Voltage - Output (Min/Fixed) | 2.495V |
What's Included
BILL OF MATERIALS
- 1x TL431BQDBZR soldered onto breakout PCB
- Pin headers pre-soldered (2.54mm / 0.1" pitch)
- All IC pins broken out to 2.54mm headers
Breakout Board Design
PCB SPECIFICATIONS
WIDTH
< 0.9" (straddles breadboard)
PITCH
2.54mm standard
SOLDER
Lead-free, reflow assembled
FINISH
FR4, lead-free HASL