Analog Devices Inc./Maxim Integrated LM4050BEX3-3.0+T

Overview

LM4050BEX3-3.0+T from Analog Devices is a precision 3.000 V, two-terminal shunt voltage reference in a 3-pin SC70 package, featuring 0.2% initial accuracy, ±50 ppm/°C max temperature coefficient over –40°C to +125°C, and stable operation across 60 µA to 15 mA shunt current - used for ADC/DAC biasing and power supply monitoring in portable instrumentation.

For engineers reviewing the LM4050BEX3-3.0+T datasheet, LM4050BEX3-3.0+T pinout, LM4050BEX3-3.0+T application, or LM4050BEX3-3.0+T equivalent, key selection criteria include guaranteed reverse breakdown tolerance (±6.0 mV at +25°C), low 45 µV_RMS wideband noise (10 Hz–10 kHz), no external capacitor requirement, and AEC-Q100 qualification for automotive-grade stability.

Technical Context

The LM4050BEX3-3.0+T implements a laser-trimmed bandgap core with integrated pass transistor to maintain precise 3.000 V reverse breakdown voltage under varying load and temperature. Its shunt architecture requires only a series resistor for biasing and operates without output capacitance.

It delivers stable regulation across –40°C to +125°C with ≤8.0 mV total voltage shift from 1 mA to 15 mA shunt current, and exhibits ≤0.8 Ω dynamic impedance at 1 mA/120 Hz - enabling high-accuracy feedback in low-power sensor signal chains and battery-monitoring circuits.

Key Specifications

Pinout & Package

LM4050BEX3-3.0+T uses a 3-pin SC70 package (1.8 mm × 1.8 mm), optimized for space-constrained PCB layouts. Pin 3 is unconnected (N.C.) and must be left floating 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 TLVH431ACDBVR and MAX6012AEUR+T, LM4050BEX3-3.0+T uniquely balances 0.2% accuracy, ±50 ppm/°C tempco, 60 µA minimum current, and SC70 size - making it optimal for space- and power-constrained industrial and automotive applications demanding proven long-term stability.

Availability

LM4050BEX3-3.0+T is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, and industrial process controllers requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LM4050BEX3-3.0+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.

The LM4050/LM4051 family was designed specifically for precision, low-power, space-constrained shunt reference applications - delivering guaranteed accuracy, temperature stability, and capacitor-free operation across harsh environments.

FAQ

What is the guaranteed reverse breakdown voltage tolerance for LM4050BEX3-3.0+T at +25°C?

The LM4050BEX3-3.0+T has a guaranteed reverse breakdown voltage of 3.000 V ±6.0 mV at +25°C (B-grade specification). This corresponds to 0.2% initial accuracy and is validated across 100% production testing. The LM4050BEX3-3.0+T maintains this tolerance under specified operating conditions including shunt currents from 60 µA to 15 mA and temperatures from –40°C to +125°C.

Does LM4050BEX3-3.0+T require an external output capacitor for stability?

No, the LM4050BEX3-3.0+T does not require an external output capacitor and remains stable with any capacitive load, including values up to 10 µF. This is confirmed by design validation and typical operating characteristics in the datasheet. The LM4050BEX3-3.0+T achieves this via internal compensation, eliminating layout dependencies and startup delays - a key advantage over many competing shunt references.

What is the minimum shunt current required for proper regulation of LM4050BEX3-3.0+T?

The LM4050BEX3-3.0+T requires a minimum shunt current of 60 µA to maintain regulation across its full temperature range (–40°C to +125°C). At +25°C, the datasheet specifies IR_MIN = 45 µA (typical), but 60 µA is the guaranteed maximum value ensuring stable 3.000 V output under worst-case conditions. Operating below 60 µA may cause output voltage deviation beyond specifications in the LM4050BEX3-3.0+T.

Is LM4050BEX3-3.0+T qualified for automotive applications?

Yes, the LM4050BEX3-3.0+T is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C ambient). This qualification is explicitly stated in the datasheet's Features and Ordering Information sections. The LM4050BEX3-3.0+T meets stress testing requirements for temperature cycling, humidity, and mechanical shock - making it suitable for engine bay, cabin, and ADAS subsystems.

What package type and dimensions does LM4050BEX3-3.0+T use?

The LM4050BEX3-3.0+T uses a 3-pin SC70 package with outline number 21-0075 and land pattern 90-0208. Its physical dimensions are 1.8 mm × 1.8 mm × 0.9 mm (L × W × H), with a 0.65 mm pin pitch. This ultra-small footprint is 50% smaller than comparable SOT23 devices and is RoHS-compliant, indicated by the "+" suffix in the package code X3+2.