Texas Instruments TL4050B50QDCKRQ1

Overview

TL4050B50QDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified precision micropower shunt voltage reference delivering a fixed 5.0 V output with ±0.2% initial tolerance (max), 50 ppm/°C temperature coefficient (max), and 93 μV_RMS wideband noise over –40°C to +125°C. It operates from 60 μA to 15 mA cathode current and serves as a stable reference in automotive power-supply monitors and high-resolution ADCs.

For engineers reviewing the TL4050B50QDCKRQ1 datasheet, TL4050B50QDCKRQ1 pinout, TL4050B50QDCKRQ1 application, or TL4050B50QDCKRQ1 equivalent, key selection criteria include its SC-70-5 package, guaranteed operation across automotive temperature range, low dynamic impedance (0.5 Ω), and stability with all capacitive loads without requiring an output capacitor.

Technical Context

The TL4050B50QDCKRQ1 functions as a two-terminal shunt reference, sinking cathode current to maintain a precise 5.0 V reverse breakdown voltage. Its design integrates low thermal hysteresis (1.4 mV), long-term stability (120 ppm after 1000 h), and robust ESD protection (±2 kV HBM).

It achieves tight regulation via internal bandgap-derived core architecture with curvature compensation, enabling stable performance across 15 μA–15 mA operating current and full –40°C to +125°C ambient range - validated per AEC-Q100 requirements for automotive electronics.

Key Specifications

Pinout & Package

TL4050B50QDCKRQ1 is packaged in SC-70-5 (DCK) - a 5-pin, surface-mount, lead-free package measuring 2.0 mm × 2.1 mm × 0.95 mm with moisture sensitivity level 1 (260°C peak reflow). Pin 1 is cathode; pins 2 and 3 are internally connected anode terminals; pins 4 and 5 are NC (no connect) and serve as mechanical support only.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050B50QDBZRQ1, the TL4050B50QDCKRQ1 offers lower thermal resistance via dual-anode pins and improved mechanical robustness, while REF3050AIDBZR trades automotive qualification and 5 V output for lower noise and smaller package - making TL4050B50QDCKRQ1 the sole AEC-Q100-compliant 5 V SC-70 shunt reference in this performance tier.

Availability

TL4050B50QDCKRQ1 is available at Aetrix Electronics and suitable for automotive power-supply monitors, high-resolution data-acquisition systems, and energy-management subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL4050B50QDCKRQ1 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 leader specializing in analog, embedded processing, and automotive ICs, with decades of expertise in precision reference design and automotive qualification.

The TL4050-Q1 product line was engineered specifically for AEC-Q100-compliant automotive subsystems demanding high accuracy, low power, and robust operation across –40°C to +125°C - including body electronics, powertrain sensors, and ADAS power monitoring.

FAQ

What is the maximum cathode current rating for TL4050B50QDCKRQ1?

The absolute maximum cathode current for TL4050B50QDCKRQ1 is 20 mA, but the recommended operating limit is 15 mA to ensure long-term stability and thermal safety within the SC-70-5 package's 289.9°C/W junction-to-ambient thermal resistance. Exceeding 15 mA risks exceeding the 150°C virtual junction temperature limit under sustained operation.

Does TL4050B50QDCKRQ1 require an output capacitor for stability?

No, TL4050B50QDCKRQ1 does not require an output capacitor for stability - it is inherently stable with all capacitive loads up to 100 nF. This eliminates risk of oscillation and reduces bill-of-materials cost, especially critical in automotive modules where component count and board area are tightly constrained.

How does the SC-70-5 package of TL4050B50QDCKRQ1 improve thermal performance versus SOT-23-3 variants?

The SC-70-5 package of TL4050B50QDCKRQ1 features dual anode pins (pins 2 and 3), reducing thermal resistance by ~15% compared to SOT-23-3 versions (θ_JA = 289.9°C/W vs. 331.1°C/W). This enables higher sustained power dissipation in high-ambient-temperature automotive locations such as under-hood ECUs.

Is TL4050B50QDCKRQ1 compatible with lead-free reflow processes?

Yes, TL4050B50QDCKRQ1 is RoHS-compliant and rated for lead-free reflow with MSL Level-1 (unlimited floor life) and peak reflow temperature of 260°C. Its NIPDAU/SN lead finish ensures reliable solder joint formation using standard Type 3 or Type 4 solder pastes.

What is the long-term stability specification for TL4050B50QDCKRQ1?

TL4050B50QDCKRQ1 exhibits 120 ppm long-term stability after 1000 hours of operation at 25°C ± 0.1°C with 100 μA cathode current. This drift value is measured under controlled conditions and reflects parametric shift due to silicon aging - critical for calibration-critical automotive applications requiring multi-year accuracy retention.