Analog Devices Inc./Maxim Integrated MAX6037BAUKADJ+

Overview

MAX6037BAUKADJ+ from Maxim Integrated is an adjustable, low-dropout, micropower voltage reference IC with active-low shutdown, delivering 1.184V to 5V output via external resistor divider. It operates from 2.5V to 5.5V supply, consumes ≤275µA quiescent current, achieves ±0.3% initial accuracy and 50ppm/°C max temperature coefficient, and supports ±5mA load current - ideal for precision battery-powered sensor front-ends and portable medical devices.

For engineers reviewing the MAX6037BAUKADJ+ datasheet, MAX6037BAUKADJ+ pinout, MAX6037BAUKADJ+ application, or MAX6037BAUKADJ+ equivalent, key selection criteria include its adjustable output range (1.184–5V), automotive-grade -40°C to +125°C operation, 5-pin SOT23 package, <500nA shutdown current, and capacitive-load stability with 0.02µF–1µF output capacitance.

Technical Context

The MAX6037BAUKADJ+ is a series-mode bandgap voltage reference with internal precision reference core and buffered output stage. Its ADJ pin enables programmable output via external resistive divider, where V_OUT = 1.184V × (1 + R₁/R₂). The device features active-low SHDN control that disables output and reduces supply current to ≤500nA while raising output impedance to >10MΩ.

It employs low-noise design (6µV_P-P, 0.1–10Hz) and maintains stability across 0.02µF–1µF output capacitance without requiring external compensation. Dropout voltage remains ≤100mV at 1mA load, enabling operation with minimal headroom in low-voltage systems such as 3.3V or 2.5V rails.

Key Specifications

Pinout & Package

MAX6037BAUKADJ+ is housed in a 5-pin SOT23-5 package (U5-2 top mark), optimized for space-constrained PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6035BAUT+T and ADR3412ARJZ-R7, MAX6037BAUKADJ+ uniquely delivers field-programmable output voltage in a micropower, automotive-grade SOT23 package - making it the only option supporting both flexibility and ultra-low-power operation in space-constrained designs.

Availability

MAX6037BAUKADJ+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition systems, and wireless sensor nodes requiring stable component supply with guaranteed automotive temperature range support.

Supply support for MAX6037BAUKADJ+ 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX6037 family targets precision, low-power reference needs in battery-operated and thermally harsh environments - emphasizing micropower operation, wide temperature range, and flexible output configuration.

FAQ

What is the minimum input voltage required for MAX6037BAUKADJ+ to regulate at 1.184V output?

The minimum input voltage is the greater of 2.5V or (V_OUT + 0.2V). For 1.184V output, V_IN(MIN) = 1.184V + 0.2V = 1.384V - but the absolute minimum specified is 2.5V. Therefore, MAX6037BAUKADJ+ requires ≥2.5V input to operate, regardless of output setting. This ensures proper internal biasing and dropout margin.

Can MAX6037BAUKADJ+ drive a 10nF ceramic capacitor directly on its output?

No. MAX6037BAUKADJ+ is specified for stable operation only with output capacitance between 0.02µF (20nF) and 1µF. A 10nF capacitor falls below the minimum 20nF requirement and may cause oscillation or degraded transient response. Use ≥20nF X7R or C0G ceramic capacitors for reliable performance.

How does the ADJ pin bias current affect accuracy in MAX6037BAUKADJ+?

The ADJ pin draws ±50nA bias current (typical 0.5nA), which flows through the lower resistor (R₂) of the divider and introduces offset error. To limit this error to <0.01%, select R₂ ≤ 100kΩ. Higher values increase error; MAX6037BAUKADJ+ datasheet recommends R₂ ≤ 1MΩ for stability, but accuracy-critical designs should use lower values.

Is MAX6037BAUKADJ+ pin-compatible with other MAX6037 variants like MAX6037BAUK33+?

Yes. All MAX6037 variants - including MAX6037BAUKADJ+, MAX6037BAUK33+, and MAX6037BAUK21+ - share identical 5-pin SOT23-5 (U5-2) packaging and pinout. The only functional difference is the internal reference core: fixed-output versions connect Pin 1 (ADJ) internally to GND or leave it unused, while MAX6037BAUKADJ+ exposes ADJ for external adjustment.

What is the typical turn-on settling time for MAX6037BAUKADJ+ when exiting shutdown?

MAX6037BAUKADJ+ achieves 0.1% output accuracy in 75µs after SHDN transitions from low to high, measured with C_OUT = 0.02µF and VIN = 3V. Settling time scales with output capacitance - doubling C_OUT approximately doubles settling time. For 1µF output cap, expect ~3.7ms typical settling to 0.1%.