NCP133AMX120TCG

Product Overview

The onsemi NCP133AMX120TCG is a positive, fixed-output linear voltage regulator for single-rail power conversion. It provides a 1.2 V output at up to 500 mA from an input voltage rated to 5.5 V. The device uses a 6-XFDFN Exposed Pad package with a 1.2 mm x 1.2 mm footprint for surface-mount assembly. Control and protection features include enable, overcurrent protection, overtemperature protection, and under-voltage lockout. Power-supply rejection is 80 dB to 70 dB at 1 kHz, and the operating temperature range is -40°C to 85°C.

Key Features

• Single positive fixed 1.2 V linear regulator output
• 500 mA output current capability
• Maximum input voltage of 5.5 V
• Dropout voltage of 0.25 V at 500 mA
• Enable control feature for output control
• Overcurrent, overtemperature, and under-voltage lockout protection
• Power-supply rejection of 80 dB to 70 dB at 1 kHz
• 6-XFDFN Exposed Pad surface-mount package with 1.2 mm x 1.2 mm device package

Applications

• Fixed 1.2 V supply rail for digital logic circuits
• Regulation of a 1.2 V output from board-level supplies up to 5.5 V
• Enable-controlled 1.2 V rail activation in embedded power architectures

Design & Procurement Notes

Design considerations should focus on the fixed 1.2 V output, the 500 mA current capability, and the 5.5 V maximum input rating. Verify that the input supply provides enough headroom for the 0.25 V dropout at the intended load current. The enable control feature can be used to manage rail activation, but the regulator remains a single fixed-output device, so it is not suitable when an adjustable output voltage is required. For layout and thermal planning, account for the 6-XFDFN Exposed Pad package and the -40°C to 85°C operating temperature range. Procurement should confirm the exact onsemi part number and package because the output voltage, current capability, and exposed-pad package are fixed characteristics of this device.