NCP781BMN033TAG

Product Overview

The NCP781BMN033TAG from onsemi is a surface-mount linear voltage regulator that provides a fixed positive 3.3 V output from a single regulator channel. It is intended for circuits that require a regulated low-current rail from higher input voltages, with a maximum input rating of 150 V. The device uses a 6-VDFN exposed-pad package, also identified as 6-DFN (3.3 x 3.3), and operates over a junction temperature range of -40°C to 125°C.

Key Features

• Fixed positive 3.3 V output with 100 mA output current
• Maximum input voltage of 150 V
• Maximum voltage dropout of 9.5 V at 100 mA
• Quiescent current of 55 µA and maximum supply current of 400 µA
• Power supply rejection ratio of 83 dB to 56 dB from 1 kHz to 100 kHz
• Over-temperature and short-circuit protection
• Surface-mount 6-VDFN exposed-pad package, 6-DFN (3.3 x 3.3)

Applications

• Low-current 3.3 V rail generation for sensor front ends
• Fixed positive 3.3 V supply for auxiliary logic circuits
• Regulated 3.3 V output derived from higher-voltage inputs in compact control boards

Design & Procurement Notes

Design teams should verify that the input voltage remains within the 150 V maximum and accounts for the 9.5 V dropout at 100 mA when the regulator is fully loaded. The 100 mA output current limits the device to low-current rails, while the 55 µA quiescent current and 400 µA maximum supply current can be used in standby current budgets. The exposed-pad 6-VDFN package and -40°C to 125°C junction temperature range should be considered in thermal and layout planning. The PSRR value, over-temperature protection, and short-circuit protection are additional factors when selecting the regulator for circuits where supply noise or protection behavior are concerns.