LK115D30

Overview

The LK115D30 is a fixed-output linear voltage regulator from the LK115 series, manufactured by STMicroelectronics. It provides a nominal output voltage of 3 V with a maximum load current capability of 100 mA. The device operates within an input voltage range up to 20 V and features a typical dropout voltage of 0.17 V at 60 mA. Quiescent current is specified as 280 µA in active mode and 0.01 µA in shutdown mode. It includes internal current limiting and thermal protection, requires only a 2.2 µF output capacitor for stability, and supports dual logic-controlled electronic shutdowns.

Feature Summary

• Dual logic-controlled electronic shutdowns allow independent control via two pins for flexible standby management.
• Very low quiescent current consumption minimizes power drain in battery-powered applications.
• Internal current limit and thermal shutdown protect the device under overload or high-temperature conditions.
• Requires minimal external capacitance (2.2 µF) for stable operation, reducing component count.

Applications

• Battery-powered systems requiring low standby power consumption
• Low noise analog circuit power supplies
• Embedded local regulators with logic-controlled enable functions

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment upon receipt. Check datasheet revisions for updated electrical characteristics. Ensure storage conditions comply with moisture sensitivity levels. Validate compatibility with existing PCB footprints before final assembly.

Selection Notes

Select this regulator when a fixed 3 V output is required with minimal quiescent current draw. Consider the dual shutdown inputs if system-level power management is needed. Verify that the input voltage does not exceed 20 V and that the load current remains within the 100 mA limit. Ensure the application environment stays within the -40 °C to 125 °C operating temperature range.

Part Context

The LK115D30 belongs to the LK115XX family of very low drop regulators offered by STMicroelectronics. This series includes variants with different fixed output voltages, such as 3.3 V and 5.0 V, sharing identical packaging and functional characteristics. The devices are designed for space-constrained applications due to their small SO-8 package and minimal external component requirements.

Replacement Considerations

LK115D33-TR: Provides 3.3 V output instead of 3 V. LK115D50-TR: Provides 5.0 V output instead of 3 V. Both share the same package, pinout, and general specifications.