Analog Devices Inc./Maxim Integrated LM4050AIM3-5.0+T

Overview

LM4050AIM3-5.0+T from Maxim Integrated is a precision 5.000V shunt voltage reference in SOT23-3 package, featuring 0.1% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +125°C, and 60µA–15mA operating current range. It serves as a stable voltage reference for ADC/DAC biasing, sensor excitation, and portable power monitoring circuits.

For engineers reviewing the LM4050AIM3-5.0+T datasheet, LM4050AIM3-5.0+T pinout, LM4050AIM3-5.0+T application, or LM4050AIM3-5.0+T equivalent, key selection criteria include guaranteed 5.000V output tolerance (±5.0mV at +25°C), ultra-low 80µVRMS wideband noise (10Hz–10kHz), no external capacitor requirement, and SC70/SOT23 package compatibility for space-constrained designs.

Technical Context

The LM4050AIM3-5.0+T implements a laser-trimmed bandgap core with integrated pass transistor to maintain precise reverse breakdown voltage under varying load and temperature conditions. Its two-terminal shunt architecture sinks current through an external series resistor to regulate voltage across the load.

It operates without output capacitance stabilization and tolerates arbitrary capacitive loads-enabling direct integration into high-impedance sensing nodes and low-power microcontroller reference inputs. Thermal performance is validated across –40°C to +125°C with guaranteed long-term stability of 120ppm over 1000 hours.

Key Specifications

Pinout & Package

LM4050AIM3-5.0+T is housed in a RoHS-compliant 3-pin SOT23-3 surface-mount package (2.92mm × 1.3mm × 1.0mm), optimized for automated assembly and thermal dissipation in dense PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLVH431ACDBVR and ADR3450ARJZ-R7, the LM4050AIM3-5.0+T delivers best-in-class micropower operation (60µA min), zero external components, and proven robustness in harsh industrial environments-making it optimal for cost-sensitive, space-constrained, and wide-temperature applications.

Availability

LM4050AIM3-5.0+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LM4050AIM3-5.0+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

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, medical, and communications applications, with emphasis on reliability, low power, and small form factor.

The LM4050 family was engineered specifically for space-critical, battery-operated systems needing high-accuracy voltage references without external compensation-targeting portable test equipment, sensor interfaces, and embedded control units.

FAQ

What is the guaranteed output voltage tolerance of LM4050AIM3-5.0+T at +25°C?

The LM4050AIM3-5.0+T guarantees a 5.000V output voltage with ±5.0mV tolerance at +25°C (0.1% grade). This specification is laser-trimmed and production-tested, ensuring consistent performance without post-manufacture calibration in applications like precision data acquisition and sensor excitation where absolute voltage accuracy is critical.

Does LM4050AIM3-5.0+T require an external output capacitor for stability?

No, the LM4050AIM3-5.0+T does not require an external output capacitor and remains stable with any capacitive load-including 0µF. This eliminates board space, BOM cost, and layout sensitivity associated with capacitor selection, making it ideal for direct connection to high-impedance ADC reference inputs or remote sensor nodes where parasitic capacitance varies.

What is the minimum operating current for LM4050AIM3-5.0+T, and why does it matter?

The LM4050AIM3-5.0+T requires a minimum shunt current of 60µA to maintain regulation. This ultra-low threshold enables operation from low-voltage sources (e.g., 3.3V supplies with appropriate series resistance) and extends battery life in portable devices. Maintaining ≥60µA ensures the bandgap core remains active and output voltage stays within specified tolerance across temperature and load variations.

How does the temperature coefficient of LM4050AIM3-5.0+T affect system accuracy over –40°C to +125°C?

The LM4050AIM3-5.0+T has a guaranteed temperature coefficient of ±15ppm/°C. Over the full –40°C to +125°C range (ΔT = 165°C), this contributes ≤±2.475mV drift from nominal 5.000V-well within the ±5.0mV initial tolerance. Combined with long-term stability of 120ppm, it ensures total error remains under 0.2% across lifetime and environmental stress in industrial and automotive applications.

Can LM4050AIM3-5.0+T be used in place of LM4050AEX3-5.0+T, and what are the key mechanical differences?

Yes, LM4050AIM3-5.0+T and LM4050AEX3-5.0+T share identical electrical specifications (5.000V, 0.1%, ±15ppm/°C), but differ mechanically: LM4050AIM3-5.0+T uses SOT23-3 (2.92mm × 1.3mm), while LM4050AEX3-5.0+T uses SC70-3 (1.8mm × 1.8mm). The SOT23 variant offers better thermal dissipation and legacy footprint compatibility; the SC70 variant saves 50% board area. Both are RoHS-compliant and pin-compatible with shared pinout (Pin 1=+, Pin 2=−, Pin 3=N.C.).