LK112SM32TR

Overview

The LK112SM32TR is a low-noise, low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a fixed positive output voltage of 3.2 V with a maximum output current capability of 200 mA. The device operates within an input voltage range from 2.5 V to 14 V and features a typical dropout voltage of 500 mV at full load. It incorporates a shutdown control function for power management efficiency. The regulator maintains a voltage regulation accuracy of 2% and draws a static current of 250 uA. It is housed in a compact SOT-23-5 surface-mount package and is rated for operation across a temperature range of -40°C to +125°C.

Feature Summary

• Integrated shutdown control function for enhanced power management
• Low noise performance suitable for sensitive analog circuits
• Fixed positive output voltage configuration
• Compact SOT-23-5 surface-mount packaging

Applications

• Battery-powered portable electronic devices requiring efficient power regulation
• Embedded systems utilizing ARM microcontrollers such as the STM32L5 series
• Low-noise analog signal conditioning circuits
• General-purpose power management in space-constrained designs

Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when sourcing components. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets prior to procurement. Ensure the ordering part number matches the required 3.2 V output variant, as other voltage options exist within the same family. Cross-reference the manufacturer part number with authorized channels to avoid counterfeit components.

Selection Notes

Select this component when a stable 3.2 V supply is required for low-power embedded applications. The choice is driven by the need for low dropout characteristics and integrated shutdown functionality. Consider the SOT-23-5 package size for board space constraints. Evaluate the 200 mA current limit against the target circuit's peak consumption requirements to ensure adequate headroom during operation.

Part Context

This component belongs to the LK112S series of low-dropout regulators from STMicroelectronics. It is categorized under Power Management ICs, specifically Linear Voltage Regulators. The series supports various fixed output voltages, with the SM32 variant providing 3.2 V. It complements STMicroelectronics' broader portfolio of embedded processors and controllers, serving as a critical power supply element in mixed-signal systems.

Replacement Considerations

The LK112SM18TR is a related part within the same family offering a different fixed output voltage of 1.8 V while maintaining identical pinouts and package dimensions. Verify that the system design can accommodate the voltage difference if substituting between variants. No other direct cross-model substitutes are confirmed in public documentation.