Analog Devices Inc./Maxim Integrated MAX6023EBT45+

Overview

MAX6023EBT45+ from Maxim Integrated is a precision, low-power, low-dropout series-mode voltage reference in a 5-bump UCSP™ package (1.0mm × 1.5mm × 0.3mm), delivering a fixed 4.5V output with ±0.2% initial accuracy, 30ppm/°C max temperature coefficient, and only 35µA quiescent supply current. It operates from (V_OUT + 0.2V) to 12.6V input and supports up to 500µA load current with <100mV dropout - ideal for battery-operated data acquisition systems requiring stable, ultra-compact reference voltage.

For engineers reviewing the MAX6023EBT45+ datasheet, MAX6023EBT45+ pinout, MAX6023EBT45+ application, or MAX6023EBT45+ equivalent, key selection considerations include its UCSP footprint constraints, no-output-capacitor operation up to 2.2nF load capacitance, line regulation of 160µV/V max, and compatibility with low-voltage, high-accuracy ADC/DAC biasing in space-constrained portable instrumentation.

Technical Context

The MAX6023EBT45+ employs a proprietary curvature-compensated bandgap core with laser-trimmed thin-film resistors to achieve <30ppm/°C drift and <0.2% initial accuracy across –40°C to +85°C. Its internal compensation eliminates need for external output capacitors while maintaining stability with capacitive loads from 0 to 2.2nF.

As a three-terminal series-mode reference, it sinks and sources up to 500µA with <200mV dropout at full load, and exhibits only 0.8µA/V supply current variation over input voltage - enabling extended battery life in handheld equipment where supply voltage varies widely during discharge.

Key Specifications

Pinout & Package

MAX6023EBT45+ uses a 5-bump UCSP™ (Ultra Compact Silicon Package) measuring 1.0mm × 1.5mm × 0.3mm - significantly smaller and lower profile than SC70 or SOT23 packages, optimized for height-critical portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADR3445ARJZ-R7 and LTC6655IMS-4.5#PBF, the MAX6023EBT45+ trades minor initial accuracy and temperature drift for decisive advantages in quiescent current (35µA vs. 125µA/1.3mA) and package size (UCSP vs. SOT23/MSOP), making it uniquely suited for battery longevity and miniaturized embedded systems.

Availability

MAX6023EBT45+ is available at Aetrix Electronics and suitable for handheld medical monitors, industrial sensor transmitters, portable data loggers, and hard-disk drive servo control requiring stable component supply with guaranteed long-term availability.

Supply support for MAX6023EBT45+ 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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX6023 family delivers precision voltage references optimized for ultra-low-power, space-constrained systems - targeting portable instrumentation, battery-operated sensors, and miniaturized data acquisition where accuracy, size, and efficiency are co-prioritized.

FAQ

What is the maximum load current supported by the MAX6023EBT45+ while maintaining specified accuracy?

The MAX6023EBT45+ is guaranteed to deliver up to 500µA load current with <100mV dropout and maintains its ±0.2% initial accuracy and 30ppm/°C temperature coefficient across this range. Output voltage deviation remains within specification under full 500µA load at temperatures from –40°C to +85°C, as verified in the MAX6023EBT45+ datasheet's load regulation test conditions.

Does the MAX6023EBT45+ require an external output capacitor for stability?

No, the MAX6023EBT45+ does not require an external output capacitor for stability. It is designed to operate oscillation-free with capacitive loads from 0 to 2.2nF. This eliminates BOM cost and PCB area typically needed for decoupling, though an optional capacitor may be added to improve transient response in step-load applications - a design choice, not a requirement for basic operation of the MAX6023EBT45+.

What is the minimum input voltage required for the MAX6023EBT45+ to regulate properly?

The MAX6023EBT45+ requires a minimum input voltage of (V_OUT + 0.2V) = 4.7V to maintain regulation. Below this, dropout occurs and output voltage drops linearly with input. This 200mV headroom enables reliable operation from single-cell Li-ion (nominal 3.7V, max 4.2V) only when paired with a boost converter - the MAX6023EBT45+ itself cannot regulate below 4.7V input.

How does the supply current of the MAX6023EBT45+ vary with input voltage changes?

The MAX6023EBT45+ exhibits only 0.8µA/V maximum variation in supply current over its full input voltage range (4.7V to 12.6V). At no load, its quiescent current remains tightly bounded at ≤35µA regardless of VIN, enabling predictable power budgeting in battery-powered systems - unlike shunt references whose current draw is fixed and independent of load demand, the MAX6023EBT45+ draws current only as needed.

Is the MAX6023EBT45+ compatible with standard reflow soldering processes for UCSP packages?

Yes, the MAX6023EBT45+ UCSP package is qualified for standard lead-free reflow profiles (J-STD-020), including peak temperatures up to 260°C. However, due to its chip-scale construction and direct solder-bump attachment, PCB layout must follow Maxim's UCSP guidelines - including pad geometry, solder mask definition, and thermal relief - to ensure reliable interconnect integrity and avoid mechanical stress-induced failures in the MAX6023EBT45+ assembly.