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TL431QPK Breakout
IC VREF SHUNT ADJ 2.5-36V SOT-89-3
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Precision programmable shunt regulator with adjustable output voltage from 2.5V to 36V using two external resistors. Offers 2% initial tolerance at 25°C with low 0.2Ω output impedance and sink-current capability from 1mA to 100mA. Ideal for on-board regulation, power supplies, and as a Zener diode replacement across automotive, industrial, and server applications.
Package: SOT-89-3 · 3 pins
Why does this need a breakout?
SOT-89-3 is too small and has leads too close together to hand-solder reliably or plug into breadboards. A breakout board spaces the three pins to standard 0.1" pitch, making it compatible with solderless prototyping and eliminating the need for fine-pitch soldering skills. Essential for rapid development with voltage regulators, transistors, and other common three-terminal devices.
Component specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | Texas Instruments |
| Part Number | TL431QPK |
| Package | SOT-89-3 |
| 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 TL431QPK 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