NJM78L12UA-TE1

Product Overview

The NJM78L12UA-TE1 from Nisshinbo Micro Devices Inc. is a positive fixed-output linear voltage regulator that provides a single 12 V output at 100 mA. The device accepts an input voltage up to 35 V and is supplied in a surface-mount TO-243AA package, SOT-89-3. It includes over-temperature and short-circuit protection and is specified for operation from -40°C to 85°C. The regulator has a quiescent current of 6.5 mA and a power-supply ripple rejection of 62 dB at 120 Hz.

Key Features

• Positive fixed 12 V output with 100 mA output current
• Single regulator channel
• Maximum input voltage 35 V
• Quiescent current 6.5 mA
• Power-supply ripple rejection 62 dB at 120 Hz
• Over-temperature and short-circuit protection
• Operating temperature range -40°C to 85°C
• Surface-mount TO-243AA package, SOT-89-3

Applications

• Low-current 12 V rail for microcontroller and logic boards
• Sensor or instrumentation front-end supply
• Signal conditioning and analog circuitry powered from a regulated 12 V source
• Auxiliary regulated supply in power supply assemblies
• Compact surface-mount 12 V linear regulation in embedded control boards

Design & Procurement Notes

When selecting the NJM78L12UA-TE1, verify that the available input voltage remains within the 35 V maximum rating and that the load current does not exceed the 100 mA output capability. The fixed 12 V output simplifies rail selection, but designers should account for the 6.5 mA quiescent current in low-power budget calculations. The 62 dB power-supply ripple rejection at 120 Hz supports evaluation of ripple attenuation under that condition, while the -40°C to 85°C operating range and surface-mount TO-243AA/SOT-89-3 package should be considered for thermal layout and board assembly.