LM4132EMFX-3.3

Voltage Reference Overview

The LM4132EMFX-3.3/NOPB is a precision series voltage reference from Texas Instruments, delivering a fixed output of 3.3 V in a compact SOT-23 (5-pin) package. It features an initial accuracy of ±0.5% and a temperature coefficient of 30 ppm/°C across the -40°C to +125°C operating range. The device operates with a supply current of 60 µA and supports up to 20 mA of load current. It includes an enable pin for shutdown mode and requires only a small input capacitor.

Voltage Reference Feature Summary

• Precision CMOS band-gap architecture utilizing EEPROM registers for curvature correction and package-level programming.
• Integrated enable pin allows switching between active operation and ultra-low power shutdown mode.
• Capable of sourcing high load currents without requiring an external buffer amplifier or output capacitor.
• Low dropout design ensures stable regulation even when the input voltage approaches the output level.

Voltage Reference Applications

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

Voltage Reference Procurement Notes

Verify the specific suffix 'E' corresponds to the required 0.5% accuracy grade and 30 ppm/°C temperature coefficient. Confirm that the 'F' indicates the tape-and-reel packaging format. Ensure the 'NOPB' designation matches RoHS compliance requirements for your assembly process.

Voltage Reference Selection Notes

Select this component when a fixed 3.3 V reference is needed in space-constrained designs. It is suitable for applications requiring moderate accuracy where the E-grade specifications meet system tolerances. Consider higher grades if tighter accuracy or lower drift is required.

Voltage Reference Part Context

This part belongs to the LM4132 family of low-dropout voltage references. The family offers various voltage options and accuracy grades (A through E). The LM4132 utilizes CMOS technology with EEPROM trimming to achieve performance comparable to laser-trimmed bipolar references while maintaining a small footprint.

Voltage Reference Replacement Considerations

LM4132DMFX-3.3/NOPB

Voltage Reference FAQ

Does the LM4132 require an output capacitor for stability?

No, the LM4132 is designed to be stable with low-ESR ceramic capacitors and does not strictly require an output capacitor or buffer amplifier for operation.

What is the function of the EN pin?

The EN (Enable) pin controls the device state. Driving it high activates the reference, while driving it low engages the shutdown mode, reducing supply current to approximately 3 µA.