LM4120IM5-5.0

Voltage Reference Overview

The LM4120IM5-5.0 is a precision micropower low dropout voltage reference manufactured by Texas Instruments, housed in a 5-pin SOT-23 package. It provides a fixed nominal output voltage of 5 V with an initial accuracy of ±0.5%. The device operates within an input voltage range of 2 V to 12 V and draws a typical supply current of 160 µA. It supports both source and sink currents up to 5 mA and features a temperature coefficient of 50 ppm/°C. The component functions reliably across an industrial ambient temperature range from -40°C to +85°C.

Voltage Reference Feature Summary

• Provides high output voltage accuracy with a standard grade tolerance of ±0.5%.
• Features a low dropout voltage characteristic for efficient operation near the input rail.
• Includes an enable pin that allows for remote shutdown capability to minimize power consumption.
• Capable of sourcing and sinking load currents up to 5 mA.

Voltage Reference Applications

• Portable and battery-powered equipment
• Instrumentation and process control systems
• Data acquisition systems
• Precision regulators

Voltage Reference Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm availability status and lead times. Ensure the selected variant matches the required accuracy grade and packaging format for your design. Confirm compliance with environmental directives such as RoHS before finalizing procurement decisions.

Voltage Reference Selection Notes

Select this component when a fixed 5 V reference with moderate precision is required in a compact surface-mount footprint. Consider the standard ±0.5% accuracy grade if tighter tolerances are not necessary. Evaluate the 160 µA supply current against system power budgets and ensure the input voltage remains within the specified operating range for stable regulation.

Voltage Reference Part Context

This device belongs to the LM4120 family of precision bandgap voltage references. The family offers multiple voltage options and two accuracy grades (Standard and A). The IM5 suffix indicates the Standard accuracy grade packaged in a 5-pin SOT-23 form factor, distinguishing it from the higher-precision AIM5 variants.

Voltage Reference Replacement Considerations

LM4120AIM5-5.0/NOPB: Offers improved initial accuracy of ±0.2% while maintaining the same package and electrical characteristics.

Voltage Reference FAQ

How does the Enable pin function?

Connecting the Enable pin to the input voltage activates normal operation. Pulling the pin to ground shuts down the device, reducing supply current to less than 2 µA.

What is the recommended output capacitor value?

The device is designed to be stable with ceramic output capacitors ranging from 0.022 µF to 0.047 µF.