MAX6037BAUK12+T

Overview

The MAX6037BAUK12+T is a low-dropout, micropower voltage reference from Analog Devices/Maxim Integrated. It provides a fixed output voltage of 1.25V with an initial accuracy of ±0.3% and a maximum temperature coefficient of 50ppm/°C. The device operates within a supply voltage range of 2.5V to 5.5V and consumes a maximum quiescent current of 275µA. It features active-low shutdown functionality reducing current to under 500nA. The component supports sourcing and sinking up to 5mA of load current and maintains stability with capacitive loads between 0.02µF and 1µF. It is housed in a 5-pin SOT-23 package and specified for the -40°C to +125°C automotive temperature range.

Feature Summary

• Active-low shutdown mode reduces quiescent current to less than 500nA
• Low dropout voltage capability of 100mV max at 1mA load current
• Capable of sourcing and sinking up to 5mA of load current
• Operates over the extended automotive temperature range of -40°C to +125°C

Applications

• Medical Equipment
• Portable Equipment
• Wireless LAN
• Precision Regulators

Procurement Notes

Verify the specific suffix 'B' indicates the 0.3% initial accuracy grade and 'K' denotes the SOT-23-5 package code. Confirm the '+T' suffix corresponds to tape-and-reel packaging as defined in the manufacturer's ordering guide. Ensure the part number matches the exact electrical characteristics required for the target application, particularly regarding the 50ppm/°C temperature coefficient limit.

Selection Notes

Select this component when a fixed 1.25V reference with moderate precision (±0.3%) is required. It is suitable for battery-powered designs due to its low quiescent current and shutdown feature. Consider the 5mA source/sink capability for driving ADCs or DACs directly. Verify that the input voltage remains above the minimum requirement relative to the output voltage to ensure proper regulation.

Part Context

This device belongs to the MAX6037 family of low-power voltage references. The family includes adjustable versions and other fixed voltage options such as 2.048V, 2.5V, 3.0V, 3.3V, and 4.096V. Variants are available with different accuracy grades (A, B, C) and temperature coefficients. The MAX6037BAUK12+T specifically represents the B-grade version with 1.25V output.

Replacement Considerations

Other members of the MAX6037 family may serve as alternatives if different output voltages or accuracy grades are acceptable. Cross-reference with MAX6037AAUK12+T for higher precision (0.2% accuracy, 25ppm/°C) or MAX6037CAUK12+T for standard accuracy (0.5% accuracy). Ensure pin compatibility and thermal performance remain consistent during substitution.