Analog Devices Inc./Maxim Integrated LM4050BEX3-5.0+T

Overview

LM4050BEX3-5.0+T from Analog Devices is a precision 5.000V, two-terminal shunt voltage reference in SC70-3 package, featuring 0.2% initial accuracy, ±50ppm/°C max temperature coefficient over –40°C to +125°C, 60µA–15mA operating current range, and 80µVRMS wideband noise (10Hz–10kHz). It serves as a stable voltage reference in high-accuracy ADC/DAC biasing, battery-powered sensor front-ends, and automotive power management circuits.

For engineers reviewing the LM4050BEX3-5.0+T datasheet, LM4050BEX3-5.0+T pinout, LM4050BEX3-5.0+T application, or LM4050BEX3-5.0+T equivalent, this page delivers verified specifications, validated pin functions, confirmed SC70-3 package mapping, real-world application context for portable and automotive systems, and two rigorously cross-checked alternative parts with documented technical and application-level differences.

Technical Context

The LM4050BEX3-5.0+T implements a laser-trimmed bandgap core with internal pass transistor to maintain precise reverse breakdown voltage under varying load and temperature. Its shunt architecture requires no external capacitor and remains stable with any capacitive load up to 10µF.

It operates across 60µA–15mA shunt current while maintaining ≤12.0mV output voltage change over full current range and ≤±50ppm/°C drift - guaranteed over –40°C to +125°C - making it suitable for high-reliability industrial and AEC-Q100-compliant automotive applications.

Key Specifications

Pinout & Package

LM4050BEX3-5.0+T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is NC and must be left unconnected or tied to Pin 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050B50IDBZR, LM4050BEX3-5.0+T delivers half the temperature drift and 35% lower noise - critical for automotive and high-precision sensor nodes; compared with REF4132B50DBVR, it enables true micropower shunt operation without supply rail dependency or capacitor requirements.

Availability

LM4050BEX3-5.0+T is available at Aetrix Electronics and suitable for battery-powered sensor nodes, automotive engine control units, and industrial process controllers requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LM4050BEX3-5.0+T 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The LM4050/LM4051 family was designed specifically for space-constrained, high-accuracy voltage reference needs in portable, automotive, and industrial systems - prioritizing micropower operation, ultra-stable tempco, and SC70 packaging.

FAQ

What is the minimum operating current for LM4050BEX3-5.0+T?

The LM4050BEX3-5.0+T requires a minimum shunt current of 60µA to maintain regulation and specified accuracy. Below this threshold, output voltage deviates beyond the ±10mV (0.2%) tolerance band. This value is guaranteed across –40°C to +125°C and is critical for designing low-power sensor nodes where quiescent current must be tightly controlled. The LM4050BEX3-5.0+T will still conduct below 60µA but cannot guarantee its rated performance.

Is LM4050BEX3-5.0+T AEC-Q100 qualified?

Yes, LM4050BEX3-5.0+T is AEC-Q100 qualified per Rev H for Grade 1 (–40°C to +125°C), as confirmed in the official Analog Devices ordering information table and features list. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD - enabling its use in automotive powertrain, chassis, and ADAS modules. The LM4050BEX3-5.0+T part number explicitly appears in the AEC-Q100-compliant ordering section of the datasheet.

Can LM4050BEX3-5.0+T drive capacitive loads without instability?

Yes, LM4050BEX3-5.0+T is internally compensated and stable with any capacitive load - including ceramic, tantalum, and electrolytic types - up to at least 10µF, as verified in typical operating characteristics (Figure 15, Output Impedance vs. Frequency). No external capacitor is required for stability, simplifying layout and eliminating risk of oscillation in ADC reference buffers or op-amp feedback networks. This behavior is inherent to its shunt architecture and does not depend on load resistance.

What is the maximum shunt current rating for LM4050BEX3-5.0+T?

The absolute maximum shunt current for LM4050BEX3-5.0+T is 20mA, as specified in Absolute Maximum Ratings. However, for reliable operation within datasheet performance guarantees, the recommended maximum is 15mA - above which dynamic impedance rises and output voltage deviation exceeds ±12.0mV. At 15mA and 5V, power dissipation reaches 75mW, requiring thermal derating above +70°C ambient due to SC70 package θJA = 340.4°C/W.

How does the pin configuration of LM4050BEX3-5.0+T differ from SOT23 versions?

LM4050BEX3-5.0+T uses the same 3-pin SC70 pinout as its SOT23 counterparts: Pin 1 (+) is anode, Pin 2 (–) is cathode/reference output, and Pin 3 is NC (no connection). Unlike some legacy shunt references, Pin 3 must never be used as a thermal pad or ground tie - it is unconnected internally and must be left floating or tied to Pin 2 per datasheet directive. The SC70 package has identical pin numbering but smaller dimensions (1.8mm × 1.8mm vs. SOT23's 2.9mm × 1.6mm), requiring distinct land patterns.