MCP1501-33E/SN

Overview

The MCP1501-33E/SN is a buffered voltage reference with a fixed output of 3.3V and an initial accuracy of ±0.1%. It operates within a supply voltage range of 3.5V to 5.5V and delivers up to 20mA of load current. The device features a maximum temperature coefficient of 50 ppm/°C across the -40°C to +125°C operating range. Typical supply current is 140µA, with a maximum of 550µA.

Feature Summary

• Provides high-precision buffered voltage output with low drift characteristics
• Capable of sourcing and sinking significant load currents for direct drive applications
• Includes a digital shutdown pin for active power management control

Applications

• Precision data acquisition systems
• High-resolution analog-to-digital converter references
• Medical equipment signal conditioning
• Industrial control circuits

Procurement Notes

Verify the specific suffix 'SN' corresponds to the SOIC-8 package configuration required for your PCB layout. Confirm that the input supply voltage meets the minimum threshold of 3.5V for stable operation at the 3.3V output level. Ensure thermal management aligns with the specified junction temperature limits during high-load conditions.

Selection Notes

Select this component when a stable 3.3V reference is needed with moderate current drive capabilities. The SOIC-8 package facilitates standard surface-mount assembly. Consider the line regulation and load regulation specifications if the input voltage or load current varies significantly during operation.

Part Context

This part belongs to the MCP1501 family of precision voltage references manufactured by Microchip Technology. The family offers various fixed output voltages and package options, including SOT-23 and WDFN. The MCP1501 series utilizes chopper-based amplifiers to minimize offset drift and improve long-term stability compared to standard bandgap references.

Replacement Considerations

MCP1501-33E/CHY (SOT-23-6 package)

FAQ

How does the FEEDBACK pin function in the SOIC-8 package?

In the SOIC-8 package, the FEEDBACK pin must be connected to the OUT pin on the PCB. This allows the feedback loop to sense the voltage directly at the load, compensating for any trace resistance between the device and the application circuit.

What is the purpose of the SHDN pin?

The SHDN pin is a digital input that places the device into a low-power shutdown state when driven low. It allows for system-level power management by disabling the output voltage reference when not in use.