Texas Instruments TL4050B50QDBZRQ1

Overview

TL4050B50QDBZRQ1 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 (10 Hz–10 kHz). It operates from 60 μA to 15 mA cathode current across –40°C to +125°C and serves as a stable reference in automotive power-supply monitors and high-resolution ADCs.

For engineers reviewing the TL4050B50QDBZRQ1 datasheet, TL4050B50QDBZRQ1 pinout, TL4050B50QDBZRQ1 application, or TL4050B50QDBZRQ1 equivalent, key selection criteria include its SOT-23-3 package, no-output-capacitor stability, low dynamic impedance (0.5 Ω), thermal hysteresis (1.4 mV), and qualification for automotive safety-critical systems.

Technical Context

The TL4050B50QDBZRQ1 functions as a two-terminal shunt reference with internal bandgap core and curvature compensation, enabling stable regulation without external capacitors. Its low 0.5 Ω dynamic impedance at 1 mA and flat impedance vs. frequency response ensure minimal output perturbation under varying load and switching conditions.

Designed for automotive environments, it integrates ESD protection (±2 kV HBM), supports operation up to 15 mA cathode current, and maintains tight output accuracy over full industrial temperature range (–40°C to +125°C) with guaranteed long-term stability of 120 ppm after 1000 hours.

Key Specifications

Pinout & Package

SOT-23-3 package (DBZ), 1.12 mm max height, JEDEC TO-236 compliant, with gull-wing leads and exposed pad not present. RoHS-compliant, NIPDAU lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050A50QDBZRQ1, the TL4050B50QDBZRQ1 trades 0.1% tolerance for cost efficiency while retaining identical automotive qualification and thermal stability; versus REF3050AIDBZR, it adds AEC-Q100 compliance and higher noise margin at the expense of slightly higher minimum current.

Availability

TL4050B50QDBZRQ1 is available at Aetrix Electronics and suitable for automotive electronics, precision data-acquisition systems, and industrial process controls requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL4050B50QDBZRQ1 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 focused on analog and embedded processing technologies, with deep expertise in precision analog design and automotive-grade reliability.

The TL4050-Q1 product line delivers AEC-Q100 qualified shunt references optimized for automotive power monitoring, battery management, and high-accuracy sensor signal chains where space, power, and qualification are critical.

FAQ

What is the maximum cathode current rating for TL4050B50QDBZRQ1?

The TL4050B50QDBZRQ1 has an absolute maximum continuous cathode current rating of 20 mA, with recommended operation up to 15 mA. Exceeding 15 mA may impact long-term stability and thermal performance; the device is characterized for optimal accuracy and noise within this 74 μA–15 mA range. Always verify power dissipation (P = V_Z × I_Z) remains within thermal limits for your PCB layout.

Does TL4050B50QDBZRQ1 require an output capacitor for stability?

No, TL4050B50QDBZRQ1 does not require an output capacitor and is stable with all capacitive loads-including zero capacitance. This eliminates BOM cost and board area while ensuring reliable start-up and transient response. TI explicitly confirms stability across 0–∞ load capacitance in the datasheet, making TL4050B50QDBZRQ1 ideal for space-constrained automotive modules.

What is the thermal hysteresis specification for TL4050B50QDBZRQ1?

The thermal hysteresis of TL4050B50QDBZRQ1 is 1.4 mV, defined as the difference in output voltage measured at 25°C after cycling from –40°C versus after cycling from +125°C. This low hysteresis ensures repeatable 5.0 V reference performance across repeated thermal excursions-critical for automotive ECUs subject to engine-off/ignition-on cycles and under-hood temperature swings.

Is TL4050B50QDBZRQ1 pin-compatible with other TL4050-Q1 variants in SOT-23-3?

Yes, TL4050B50QDBZRQ1 is pin-compatible with all TL4050x-Q1 variants offered in the SOT-23-3 (DBZ) package-including TL4050A20QDBZRQ1, TL4050B25QDBZRQ1, and TL4050C50QDBZRQ1. All share identical pin 1 (anode), pin 2 (cathode), and pin 3 (NC/tie) assignments, enabling drop-in replacement across voltage and grade options without PCB redesign.

What packaging and reel information applies to TL4050B50QDBZRQ1?

TL4050B50QDBZRQ1 is supplied in SOT-23-3 (DBZ) package, 3000 units per 8-mm tape-and-reel, with Q3 pin-1 quadrant orientation. Reel diameter is 179 mm, width 8.4 mm, and pitch 4.0 mm. The part marking is "TLJU", RoHS-compliant with NIPDAU lead finish, and MSL Level-1 (260°C peak reflow, unlimited floor life).