NCP133AMX115TCG

Product Overview

The NCP133AMX115TCG from Fairchild Semiconductor is a fixed-output linear voltage regulator for compact surface-mount power management. It provides a positive 1.15V output at up to 500mA from an input of up to 5.5V, with a maximum dropout voltage of 0.25V at 500mA. The device is in a 6-XDFN exposed-pad package (1.2x1.2), includes an enable control feature, and provides over-current, over-temperature, and under-voltage lockout protection. The operating temperature range is -40°C to 85°C, and the PSRR is 80dB ~ 70dB at 1kHz.

Key Features

• Fixed positive 1.15V output with one regulator and 500mA output current.
• Maximum input voltage of 5.5V and maximum dropout voltage of 0.25V at 500mA.
• Enable control for regulated output management.
• Over-current, over-temperature, and under-voltage lockout protection.
• PSRR of 80dB ~ 70dB at 1kHz.
• Surface-mount 6-XDFN exposed-pad package (1.2x1.2) for space-limited PCB layouts.

Applications

• Regulating a 1.15V supply for low-voltage digital or analog loads on compact embedded boards.
• Providing local post-regulation from a 5.5V or lower input in space-constrained surface-mount assemblies.
• Enable-controlled power management for low-voltage signal or logic paths.

Design & Procurement Notes

For design use, verify that the available input voltage provides sufficient headroom above the 1.15V output, using the 0.25V maximum dropout at 500mA as a reference, and remains below the 5.5V maximum input rating. The exposed-pad 6-XDFN package (1.2x1.2) should be soldered to a PCB pad pattern that supports thermal dissipation, especially near the 500mA output limit and within the -40°C to 85°C operating range. The enable control can be used for controlled output activation, and the over-current, over-temperature, and UVLO features should be considered as part of the power architecture rather than as substitutes for external protection. PSRR at 1kHz is relevant when assessing sensitivity to input ripple in low-voltage signal or logic paths.