LTC1682CMS8#TR

The LTC1682CMS8#TR from LT is a doubler charge pump integrated circuit with an internal low noise, low dropout (LDO) linear regulator. This device is designed to deliver a low noise boosted supply voltage, making it suitable for powering noise-sensitive components such as high frequency VCOs in wireless applications.

The internal doubler charge pump converts an input voltage range of 1.8V to 4.4V to a boosted output. This boosted voltage is then regulated by the internal LDO to provide a stable, low noise output. The regulator can supply up to 50mA of output current. Key electrical specifications include a wide input voltage range of 1.8V to 4.4V, a fixed 3.3V output voltage, and a switching frequency of 550kHz.

For noise-sensitive applications, the LTC1682 offers low output noise of 60µVRMS (100kHz BW). It operates with low quiescent current (150µA) and very low shutdown current (<5µA). The device incorporates internal thermal shutdown and current limiting for protection. It is stable with a small 2µF output capacitor, allowing for reduced PCB area.

The LTC1682CMS8#TR is available in an 8-pin MSOP package and is suitable for surface mount applications. It also features short-circuit and over-temperature protection.