VREF SHUNT REGULATOR ADJ 0.5% SOT23-3
Texas Instruments

Bypass caps, pull-ups, strapping resistors, custom silkscreen & more
Design a Custom BoardPrecision 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.
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.
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 |
BILL OF MATERIALS
PCB SPECIFICATIONS
< 0.9" (straddles breadboard)
2.54mm standard
Lead-free, reflow assembled
FR4, lead-free HASL