STMicroelectronics

LF85CPT  

Linear & Switching Voltage Regulators

LF85CPT Description

The LF85CPT is a linear regulator IC designed by STMicroelectronics, featuring a fixed output voltage of 8.5V and capable of delivering a maximum output current of 500mA. This device is housed in a PPAK package, making it suitable for surface mount applications. The LF85C isPT designed to operate with an input voltage range up to 16V, ensuring a wide compatibility with various power sources. It boasts a low dropout voltage of 0.7V at 500mA, which enhances its efficiency and performance in low-voltage applications. The regulator also features a quiescent current of 1.5mA, contributing to its overall power efficiency. Additionally, the LF85CPT includes protection features such as over-current and over-temperature protection, ensuring reliable operation under varying conditions. Despite being marked as obsolete, the LF85CPT remains a robust choice for applications requiring a stable and efficient power supply.

LF85CPT Features

• Fixed Output Voltage: The LF85CPT provides a stable output voltage of 8.5V, ensuring consistent power delivery to connected devices.
• High Efficiency: With a low dropout voltage of 0.7V at 500mA, the LF85CPT operates efficiently even when the input voltage is close to the output voltage.
• Low Quiescent Current: The regulator consumes only 1.5mA in quiescent mode, making it suitable for battery-powered and low-power applications.
• Protection Features: Over-current and over-temperature protection mechanisms safeguard the device and connected circuits from damage.
• Enable Control Feature: The LF85CPT includes an enable control feature, allowing users to turn the regulator on and off as needed, which is beneficial for power management in complex systems.
• Surface Mount Compatibility: The PPAK package is designed for surface mount technology, facilitating easy integration into modern printed circuit boards.
• Wide Input Voltage Range: The regulator can handle input voltages up to 16V, providing flexibility in power source selection.
• High PSRR: The LF85CPT offers a high power supply rejection ratio (PSRR) ranging from 72dB to 57dB across frequencies from 120Hz to 10kHz, ensuring minimal noise in the output voltage.

LF85CPT Applications

The LF85CPT is well-suited for a variety of applications where a stable and efficient power supply is required. Some specific use cases include:

• Battery-Powered Devices: The low quiescent current and low dropout voltage make the LF85CPT ideal for battery-powered applications, where power efficiency is crucial.
• Industrial Control Systems: The regulator's robustness and protection features make it suitable for industrial environments where reliability and durability are paramount.
• Consumer Electronics: The LF85CPT can be used in consumer that electronics require a stable power supply, such as portable devices and small appliances.
• Telecommunications: The regulator's ability to handle a wide input voltage range and its high PSRR make it suitable for telecom equipment where power stability and noise reduction are essential.
• Automotive Electronics: The LF85CPT's surface mount compatibility and protection features make it a good fit for automotive applications where space is limited and reliability is critical.

Conclusion of LF85CPT

The8 LF5CPT, despite being marked as obsolete, remains a reliable and efficient linear regulator IC. Its fixed output voltage of 8.5V and maximum output current of 500mA make it suitable for a wide range of applications. The low dropout voltage, low quiescent current, and high PSRR contribute to its overall efficiency and performance. The inclusion of over-current and over-temperature protection features ensures robustness and reliability. The LF85CPT's surface mount compatibility P andPAK package make it easy to integrate into modern PCB designs. While newer alternatives may exist, the LF85CPT continues to offer significant advantages for applications requiring a stable and efficient power supply.

LF85CPT Documents

Download datasheets and manufacturer documentation for LF85CPT