NJM78L08UA-TE1

Product Overview

The NJM78L08UA-TE1 from Nisshinbo Micro Devices Inc. is a fixed positive linear voltage regulator intended for surface-mount power management. It provides one 8 V output at up to 100 mA and accepts input voltages up to 30 V. The device uses a SOT-89 package, identified as TO-243AA, and is rated for operation from -40°C to 85°C. It includes over-temperature and short-circuit protection, with quiescent current of 6 mA and power-supply ripple rejection of 66 dB at 120 Hz.

Key Features

• Fixed positive 8 V output with one regulator and 100 mA output current.
• Input voltage capability up to 30 V for deriving a regulated 8 V rail from higher DC supplies.
• Over-temperature and short-circuit protection for fault conditions during board operation.
• Surface-mount SOT-89 package, TO-243AA, with operating temperature range of -40°C to 85°C.
• Quiescent current of 6 mA and PSRR of 66 dB at 120 Hz.

Applications

• Fixed 8 V rail for low-current control or sensing circuitry on surface-mount boards.
• Regulation of higher DC input voltages, up to 30 V, to a regulated single-output 8 V supply in power management sections.
• Low-current subsystems where input ripple is a concern and the 66 dB PSRR at 120 Hz is relevant.

Design & Procurement Notes

Design review should confirm that the load requires a fixed 8 V positive rail and draws no more than 100 mA, since the output is not adjustable. The input supply must remain within the 30 V maximum, and the difference between input and output voltage should be evaluated for thermal dissipation in the SOT-89 package. The 6 mA quiescent current should be included in power-budget calculations, and the 66 dB PSRR at 120 Hz should be checked against expected input ripple. Surface-mount assembly requires a footprint compatible with TO-243AA, and the -40°C to 85°C operating range should be verified against the board environment.