L78L12ACUTR

$0.47

Description：IC REG LINEAR 12V 100MA SOT89-3
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:f0dd4eac8154 Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: STMicroelectronics

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Product introduction

Product Detailed Parameters

Description：IC REG LINEAR 12V 100MA SOT89-3
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)
Output Configuration：Positive
Output Type：Fixed
Number of Regulators：1
Voltage - Input (Max)：35V
Voltage - Output (Min/Fixed)：12V
Voltage - Output (Max)：-
Voltage Dropout (Max)：-
Current - Output：100mA
Current - Quiescent (Iq)：6 mA
Current - Supply (Max)：6.5 mA
PSRR：42dB (120Hz)
Control Features：-
Protection Features：Over Current, Over Temperature, Short Circuit
Operating Temperature：0°C ~ 125°C
Mounting Type：Surface Mount
Package / Case：TO-243AA
Supplier Device Package：SOT-89-3
Grade：-
Qualification：-

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L78L12ACUTR

Overview

The L78L12ACUTR is a three-terminal positive linear voltage regulator from the L78L series, manufactured by STMicroelectronics. It provides a fixed output voltage of 12 V with a maximum output current of 100 mA. The device operates within an input voltage range of 14.5 V to 35 V and supports a junction temperature range of 0 °C to 125 °C. Electrical characteristics include a typical quiescent current of 6.5 mA, line regulation of 250 mV, load regulation of 100 mV, and supply voltage rejection of 42 dB at 120 Hz. It is housed in a surface-mount SOT-89 package.

Feature Summary

Internal current limiting and thermal shutdown protection mechanisms ensure robust operation under fault conditions.
Designed as a direct replacement for Zener diode and resistor combinations, offering lower noise and reduced quiescent current.
Capable of local or on-card regulation to eliminate noise and distribution issues associated with single-point regulation systems.

Applications

Local or on-card voltage regulation
Replacement for Zener diode/resistor networks
Power management circuits requiring fixed positive voltage

Procurement Notes

Verify that the component matches the specific L78L12ACUTR part number, ensuring the 'A' suffix indicates the correct ±4% voltage tolerance and the 'UTR' suffix corresponds to the SOT-89 tape-and-reel packaging configuration. Confirm compliance with RoHS directives and check for any specific environmental grades such as ECOPACK if required by the application standards.

Selection Notes

Select this component when a fixed 12 V output is required with up to 100 mA load capability in a compact surface-mount form factor. Ensure the input voltage remains within the specified 14.5 V to 35 V range to maintain proper regulation. Consider the thermal resistance of the SOT-89 package and the need for adequate copper area on the printed circuit board for heat dissipation during high-load operations.

Part Context

This device belongs to the L78Lxx series of three-terminal positive regulators produced by STMicroelectronics. The series is characterized by internal current limiting and thermal overload protection, making it suitable for applications where reliability and simplicity are prioritized. The L78L12 variant specifically targets designs needing a stable 12 V rail from higher voltage sources.