LTC1682IS8-3.3

The LTC1682IS8-3.3 is a doubler charge pump integrated circuit with an internal low noise, low dropout linear regulator, manufactured by LT. This device is designed to generate a low noise, boosted supply voltage, making it ideal for powering noise-sensitive components such as high frequency VCOs in wireless applications.

Key electrical specifications include a wide input voltage range of 1.8V to 4.4V and an output current capability of up to 50mA. The adjustable output voltage can be set from 2.5V to 5.5V, while fixed output versions are available at 3.3V and 5V. It operates at a switching frequency of 550kHz and exhibits low output noise of 60mVRMS (100kHz BW). The device also features low operating current of 150mA and a low shutdown current of 1mA.

Designed for efficiency and space-saving, the LTC1682IS8-3.3 utilizes small ceramic capacitors and requires no inductors. It is available in compact 8-pin MSOP and SO packages, suitable for surface mount applications. Internal protection features include thermal shutdown and current limiting, enhancing reliability.

This charge pump is well-suited for applications such as VCO power supplies in cellular phones, 2-way pagers, wireless PCMCIA cards, portable medical instruments, low power data acquisition, and remote transmitters where a clean, boosted power source is critical.