Texas Instruments TL4050A50QDCKT

Overview

TL4050A50QDCKT from Texas Instruments is a precision micropower shunt voltage reference with 5.0V nominal output, ±0.1% initial tolerance (max), 50ppm/°C temperature coefficient, 93μVRMS wideband noise, and operation across –40°C to 125°C. It serves as a stable voltage reference in high-accuracy data acquisition and automotive power-supply monitoring circuits requiring minimal quiescent current.

For engineers reviewing the TL4050A50QDCKT datasheet, TL4050A50QDCKT pinout, TL4050A50QDCKT application, or TL4050A50QDCKT equivalent, key selection criteria include guaranteed 5.0V output stability over full temperature range, low 74μA typical minimum cathode current, SC-70 package compatibility with space-constrained PCB layouts, and absence of required output capacitance for stability.

Technical Context

The TL4050A50QDCKT operates as a two-terminal shunt reference, sinking cathode current to maintain precise 5.0V reverse breakdown voltage. Its internal bandgap core delivers low dynamic impedance (0.5Ω at 1mA) and thermal hysteresis of only 1.4mV over –40°C to 125°C cycling.

Designed for extended temperature operation, it maintains ±30ppm/°C tempco at 10mA cathode current and supports 15mA max continuous cathode current while remaining stable with any capacitive load - eliminating need for external bypass capacitors.

Key Specifications

Pinout & Package

TL4050A50QDCKT is housed in a 3-pin SC-70 (DCK) package, measuring 2.0mm × 2.1mm × 0.9mm, optimized for high-density PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar shunt voltage reference applications.

Compared with REF3050AIDBZR and ADR3450ARJZ-R7, TL4050A50QDCKT offers the only combination of 5.0V output, –40°C to 125°C rating, SC-70 packaging, and sub-100μA minimum current - making it uniquely suited for automotive and space-constrained industrial sensing.

Availability

TL4050A50QDCKT is available at Aetrix Electronics and suitable for automotive power-supply monitoring, industrial data-acquisition systems, and precision audio converters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL4050A50QDCKT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TL4050 series belongs to TI's precision voltage reference product line, engineered specifically for high-accuracy, low-power shunt regulation in harsh-temperature environments where size and reliability are critical.

FAQ

What is the maximum cathode current rating for TL4050A50QDCKT?

The TL4050A50QDCKT has a maximum continuous cathode current rating of 15mA, as specified in its Absolute Maximum Ratings table. Exceeding this value risks permanent damage. The device is designed to operate reliably within 74μA to 15mA cathode current range, with optimal stability and accuracy maintained across this span. Always verify worst-case current in shunt regulator designs using Equation 1 from the datasheet.

Does TL4050A50QDCKT require an output capacitor for stability?

No, TL4050A50QDCKT does not require an output capacitor for stability. Its architecture is inherently stable with all capacitive loads, including zero capacitance. While an optional bypass capacitor may be added for additional noise filtering, TI explicitly states no output capacitor is necessary - simplifying layout and reducing component count in space-sensitive applications like automotive ECUs.

What is the thermal hysteresis specification for TL4050A50QDCKT?

The thermal hysteresis of TL4050A50QDCKT is 1.4mV, defined as the difference between its 25°C output voltage after cycling to –40°C versus after cycling to 125°C. This low hysteresis ensures repeatable 5.0V reference performance across repeated thermal cycles, critical for applications such as battery management systems where calibration integrity must persist through environmental stress testing.

How does the SC-70 package of TL4050A50QDCKT differ from SOT-23 variants in the same family?

The TL4050A50QDCKT uses the SC-70 (DCK) package - a 3-pin, 2.0mm × 2.1mm body - whereas SOT-23 variants (e.g., TL4050A50QDBZR) use the slightly larger SOT-23-3 (DBZ) package. Both share identical electrical specifications and pinout (Anode–Cathode–NC), but the SC-70 reduces PCB area by ~30%, enabling denser routing in compact modules like portable test equipment and wearable health monitors.

Can TL4050A50QDCKT be used as a replacement for TL4050A50IDCKT in new designs?

Yes, TL4050A50QDCKT can replace TL4050A50IDCKT in new designs where extended temperature operation is required. Both share identical SC-70 packaging, 5.0V output, ±0.1% tolerance, and 50ppm/°C tempco, but TL4050A50QDCKT is characterized for –40°C to 125°C, while TL4050A50IDCKT is rated only to 85°C. No layout or schematic changes are needed - the Q-grade part provides enhanced thermal robustness without functional trade-offs.