KF25BD-TR

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The KF25BD-TR is a positive fixed linear voltage regulator manufactured by STMicroelectronics, belonging to the KFxxB series. It provides a fixed output voltage of 2.5V with a maximum output current capability of 500mA. The device operates within an input voltage range up to 20V and features a typical dropout voltage of 0.4V, rising to 0.7V at full load. Quiescent current is specified at 1mA during operation. Power supply rejection ratio (PSRR) ranges from 82dB at 120Hz to 60dB at 10kHz. The component includes internal overcurrent and thermal overload protection mechanisms and supports logic-controlled electronic shutdown via a TTL-compatible enable pin. It is housed in an 8-SOIC package and is rated for operation between -40°C and +125°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Logic-controlled electronic shutdown function compatible with TTL levels
• Internal protection against overcurrent conditions and thermal overload
• Very low dropout voltage characteristics suitable for battery-powered systems
• Requires only a 2.2 μF capacitor for stability

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Low noise power supplies
• Battery powered systems
• Industrial applications

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'BD' indicates the 8-SOIC package configuration rather than alternative packages like DPAK. Confirm that the ordering code matches the required tape-and-reel quantity if applicable. Ensure compatibility with the intended PCB footprint for the SOIC-8 form factor. Cross-reference the manufacturer's latest datasheet for any updates on moisture sensitivity or RoHS compliance status prior to final procurement.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 2.5V rail is required with moderate current demands up to 500mA. The 8-SOIC package offers a balance of thermal performance and board space efficiency compared to smaller packages. Consider the 0.7V dropout at full load to ensure sufficient input-output differential. The inclusion of an enable pin allows for system-level power management strategies not available in standard non-shutdown regulators.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the KFxxB family of very low drop voltage regulators from STMicroelectronics. The series is characterized by low quiescent current and low dropout voltage, making it distinct from general-purpose LDOs. While other variants in the family offer different output voltages such as 3.3V, 5V, or 8V, the KF25BD-TR specifically targets 2.5V applications. The family shares common features including internal current limiting and thermal protection.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.