LK112M28TR

Overview

The LK112M28TR is a low-dropout linear voltage regulator manufactured by STMicroelectronics, featuring a fixed 2.8 V output and a maximum continuous output current of 150 mA. It operates within an input voltage range of 2.5 V to 14 V and maintains a typical quiescent current of 250 µA. The device provides a maximum dropout voltage of 500 mV at full load and ensures voltage regulation accuracy of 2%. It is housed in a compact SOT-23-5 surface-mount package and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Integrated electronic shutdown switch controllable via TTL or CMOS logic levels
• Low noise performance with high power supply rejection ratio
• Built-in protection features including thermal overload and current limiting

Applications

• Battery-powered portable electronics requiring efficient power management
• Embedded systems utilizing microcontrollers and memory modules
• Communication equipment needing stable low-noise voltage rails

Procurement Notes

Verify the specific suffix 'M' indicates the 2.8 V fixed output variant distinct from other voltage options in the LK112 series. Confirm the 'TR' suffix denotes tape and reel packaging for automated assembly processes. Ensure compatibility with standard SOT-23-5 footprints during PCB layout verification. Check for any updated environmental compliance documentation if required for specific regional regulations.

Selection Notes

Select this component when a fixed 2.8 V rail is required with moderate current demands up to 150 mA. Consider the low quiescent current for battery life optimization in portable devices. Evaluate the dropout voltage characteristics against the minimum available input voltage in the system design. Verify that the SOT-23-5 package size fits within the spatial constraints of the target application board.

Part Context

This part belongs to the LK112S family of low-dropout linear regulators designed for general-purpose power management applications. The series offers various fixed output voltages to accommodate different logic families and sensor requirements. STMicroelectronics utilizes this platform to provide reliable voltage regulation with integrated shutdown capabilities for enhanced system control and power efficiency.

Replacement Considerations

Direct substitutes include other LK112 variants with compatible pinouts but different output voltages, such as LK112M33TR (3.3 V) or LK112M18TR (1.8 V), provided the voltage requirement matches. Cross-reference with similar SOT-23-5 LDOs from other manufacturers only if electrical parameters like dropout voltage and quiescent current are strictly comparable.