LM4132BMF-3.3

Voltage Reference Overview

The LM4132BMF-3.3 is a precision series voltage reference from Texas Instruments, manufactured in the SOT-23 (5-pin) package. It provides a fixed output voltage of 3.3 V with an initial accuracy of ±0.1%. The device operates within a junction temperature range of -40°C to +125°C and features a maximum supply current of 60 µA at 25°C, increasing to 100 µA across the full operating temperature range. Line regulation is specified at 85 ppm/V, while load regulation is 25 ppm/mA. The component supports a maximum load current of 20 mA and includes an enable pin for power management.

Voltage Reference Feature Summary

• Utilizes EEPROM registers for curvature correction and package-level programming to maintain high accuracy despite assembly shifts.
• Features an enable pin that allows switching to a low-power shutdown mode with minimal quiescent current consumption.
• Capable of delivering up to 20 mA of output current without requiring an external buffer amplifier or output capacitor.

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 'BMF' against the manufacturer's datasheet to confirm the B-grade accuracy and SOT-23 packaging details. Ensure the ordering code matches the required 3.3 V output specification. Confirm RoHS compliance status through official documentation before procurement.

Voltage Reference Selection Notes

Select this component when a fixed 3.3 V reference with ±0.1% initial accuracy is required in a space-constrained SOT-23 footprint. Consider the 60 µA supply current for battery life calculations. Verify that the input voltage remains within the recommended operating conditions relative to the 3.3 V output.

Voltage Reference Part Context

This part belongs to the LM4132 family of precision low dropout voltage references. The family utilizes CMOS technology with EEPROM trimming to achieve performance comparable to laser-trimmed bipolar references. The LM4132BMF-3.3 represents the B-grade variant, offering tighter accuracy than standard E-grade devices while maintaining low power consumption.

Voltage Reference Replacement Considerations

LM4132DMF-3.3

Voltage Reference FAQ

Does the LM4132BMF-3.3 require an output capacitor?

No, the device does not require an output capacitor or buffer amplifier for stability.

What is the function of the EN pin?

The EN pin serves as an enable input that allows the device to enter a shutdown mode with reduced supply current.