LTC1682CMS8-5#TR

The LTC1682CMS8-5#TR from Analog Devices is a versatile doubler charge pump integrated circuit featuring a low noise, low dropout (LDO) linear regulator. This device is designed to deliver a clean, boosted supply voltage, making it ideal for powering noise-sensitive applications such as high-frequency VCOs in wireless communication systems.

This charge pump converts an input voltage range of 1.8V to 4.4V to a boosted output, which is then regulated by the internal LDO to provide a stable, low-noise output. The LTC1682 series offers fixed output voltages, including the 5V version for this specific part number, as well as an adjustable version. It can supply up to 50mA of output current and operates at a switching frequency of 550kHz.

Key features include low output noise of 60µVRMS (100kHz BW), low operating current of 150µA, and low shutdown current of 1µA. The device incorporates internal thermal shutdown and current limiting for protection. It is stable with small ceramic capacitors, reducing board space, and is available in an 8-pin SO package.

Applications for the LTC1682CMS8-5#TR include VCO power supplies in cellular phones, 2-way pagers, wireless PCMCIA cards, portable medical instruments, low power data acquisition systems, and remote transmitters.