MAX6145ESA

Overview

The MAX6145ESA is a low-dropout, micropower three-terminal voltage reference providing a fixed 4.5V output. It operates with a supply voltage range of 4.7V to 12.6V and features a typical temperature coefficient of 15ppm/°C, guaranteed under 50ppm/°C. The device draws approximately 79µA at +25°C and up to 130µA across the full operating temperature range. It offers ±1% initial accuracy and maintains stability for capacitive loads up to 10nF without requiring an output capacitor.

Feature Summary

• Low dropout voltage capability of 200mV optimizes operation in 3V and 5V systems
• Micropower consumption with supply current virtually independent of input voltage variations
• Stable operation with all capacitive loads up to 10nF

Applications

• Battery-powered systems
• Portable and hand-held equipment
• Data-acquisition systems
• Instrumentation and process control

Procurement Notes

Verify the specific package type and temperature grade against project requirements before procurement. Confirm availability status as distribution channels may vary. Ensure proper handling procedures are followed during installation to maintain component integrity and performance specifications.

Selection Notes

Select this component when a fixed 4.5V precision reference is required with minimal quiescent current draw. The low dropout characteristic makes it suitable for applications where the input voltage is close to the desired output level. Verify that the load capacitance does not exceed the specified limit to ensure stability.

Part Context

This part belongs to the MAX61xx family of low-cost, low-dropout voltage references manufactured by Analog Devices Inc./Maxim Integrated. The family includes variants with different fixed output voltages such as 2.5V, 4.096V, and 5.0V, as well as an adjustable version. These devices share common architectural features designed for efficiency in portable electronics.

Replacement Considerations

Compatible substitutes within the same family include MAX6141 (4.096V) and MAX6150 (5.0V), provided the output voltage requirement can be adjusted. Other packages like SOT23-3 (MAX6145EUR-T) offer pin-compatible alternatives for space-constrained designs.