Linear Technology's LTC1550LCS8: Low Noise, Switched-Capacitor Voltage Converter

The LTC1550LCS8 is a high-performance, low noise, switched-capacitor voltage converter designed by Linear Technology, now part of Analog Devices. This integrated circuit is engineered to provide a stable and reliable negative voltage from a positive voltage input, making it an ideal choice for a wide range of applications that require a dual supply from a single positive supply rail.

Key Features

• Output Voltage: The LTC1550LCS8 delivers a regulated negative voltage that is almost equal to the positive input voltage, with only a small voltage drop, typically 50mV.
• High Output Current: This device is capable of delivering up to 100mA of continuous output current, which is suitable for powering operational amplifiers, data converters, and other analog circuits.
• Low Noise Operation: The LTC1550LCS8 employs a low-noise charge pump architecture that minimizes output ripple and noise, making it ideal for sensitive analog and mixed-signal applications.
• Wide Input Voltage Range: It operates with an input voltage range from 2.7V to 5.5V, allowing for flexible use in various system designs.
• High Frequency: With a switching frequency of 20kHz, the LTC1550LCS8 keeps the switching noise out of the critical audio and data acquisition frequency ranges.

Applications

The LTC1550LCS8 is versatile enough to be used in a variety of applications, including:

• Portable Battery-Powered Equipment
• Operational Amplifier Systems with Single Power Supplies
• Data Acquisition Systems
• Handheld Test Instruments
• Audio Applications

Package and Reliability

Encased in an 8-lead SOIC package, the LTC1550LCS8 is designed to be compact and suitable for space-constrained applications. It also features over-temperature protection and short-circuit protection, enhancing its reliability and longevity in demanding environments.

Overall, the LTC1550LCS8 from Linear Technology stands out as a robust and efficient solution for generating a low-noise negative voltage rail in a variety of electronic systems.