NCP331SNT1G

Overview

The NCP331SNT1G is a low-dropout (LDO) linear voltage regulator manufactured by onsemi, designed for surface-mount applications in the SOT-23-5 package. It provides a fixed output voltage of 3.3 V with a maximum continuous output current of 150 mA. The device features a typical quiescent current of 8 uA and an initial accuracy of 1%. Key electrical parameters include a dropout voltage of 40 mV at 10 mA and a line regulation of 30 mV. It operates within a temperature range of -40°C to +85°C.

Feature Summary

• Fixed 3.3 V output voltage with high precision
• Ultra-low quiescent current for power efficiency
• Integrated enable control functionality
• Compact SOT-23-5 surface-mount packaging

Applications

• Portable battery-powered electronic devices
• Low-power embedded systems requiring stable voltage rails
• CMOS logic circuits needing clean power supply
• Wireless communication modules

Procurement Notes

Verify that the ordering suffix matches the required tape-and-reel quantity specifications. Confirm RoHS compliance status and ensure the SOT-23-5 footprint aligns with the PCB design. Check for any specific handling requirements related to moisture sensitivity levels before assembly. Validate that the fixed 3.3 V output meets the target circuit's voltage tolerance requirements without external adjustment.

Selection Notes

Select this component when a fixed 3.3 V rail is required with minimal static power consumption. The 150 mA output capability suits moderate load currents. Ensure the input voltage remains above the minimum operating threshold to maintain regulation. Consider the thermal performance in the SOT-23-5 package under expected ambient conditions. This part is suitable for space-constrained designs where board area is limited.

Part Context

The NCP331 series belongs to onsemi's portfolio of CMOS LDO regulators optimized for low-noise and low-quiescent-current applications. These devices are part of the broader PMIC category, focusing on efficient power management for portable electronics. The NCP331SNT1G specifically offers a fixed 3.3 V output, distinguishing it from adjustable variants within the same family.

Replacement Considerations

Compatible substitutes include other 3.3 V LDOs in SOT-23-5 packages with similar current ratings, such as the MIC5205 or TLV73333. Verify pinout compatibility and electrical parameter equivalence before substitution. Ensure thermal characteristics and package dimensions match the existing design constraints.