RP173K331D-TR

Product Overview

The RP173K331D-TR from Nisshinbo Micro Devices Inc. is a positive fixed-output linear regulator intended for compact surface-mount power-management circuits. It provides a single 3.3 V output at up to 150 mA and is housed in a DFN(PL)1010-4 / 4-UDFN exposed-pad package. The device includes an enable control feature and protection against over-current and reverse-current conditions, while its 3.7 µA quiescent current supports low-power operation. The operating temperature range is -40°C to 85°C (TA). This regulator is suitable for applications that require a simple fixed 3.3 V rail in a small footprint without external output voltage setting components.

Key Features

• Positive fixed output with a single 3.3 V regulator output.
• Output current rating of 150 mA.
• Voltage dropout specification of 1.05 V at 150 mA.
• Quiescent current of 3.7 µA.
• Enable control feature.
• Over-current and reverse-current protection.
• Operating temperature range from -40°C to 85°C (TA).
• 4-UDFN exposed-pad surface-mount package, DFN(PL)1010-4.

Applications

• Fixed 3.3 V supply rail for compact microcontroller peripheral circuits.
• Low-current battery-powered modules where enable control and 3.7 µA quiescent current help manage power consumption.
• Sensor interface boards requiring a single positive fixed linear-regulated output.
• Small-footprint embedded control boards using a surface-mount DFN package.

Design & Procurement Notes

When selecting this regulator, account for the fixed 3.3 V output and 150 mA output current, as well as the 1.05 V dropout at 150 mA, which determines the input headroom required under full load. The enable control feature should be integrated into the circuit to control regulator operation, and the over-current and reverse-current protection functions should be considered in fault-handling design. The DFN(PL)1010-4 / 4-UDFN exposed-pad package requires surface-mount layout and thermal pad consideration. The -40°C to 85°C (TA) operating range should be evaluated against the final board environment. Use the exact manufacturer part number RP173K331D-TR when specifying this fixed-output variant and package.