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BUY LTC3554EUD-3 https://www.utsource.net/itm/p/4811083.html
IC USB POWER MANAGER
The LTC3554EUD-3 is a synchronous step-down DC/DC converter with an integrated power switch and an internal power MOSFET. It is designed to deliver up to 1.5A of continuous output current from a 2.5V to 5.5V input voltage range. The device operates at a fixed frequency of 1.2MHz and includes a programmable soft-start feature. The LTC3554EUD-3 is available in a QFN-20 package and is ideal for space-constrained applications. It features an integrated power switch, low quiescent current, and low output ripple. The device also includes a power good output, over-temperature protection, and over-current protection. The LTC3554EUD-3 is suitable for a wide range of applications, including portable electronics, cellular phones, PDAs, digital cameras, and other battery-powered applications. It is also suitable for automotive applications. (For reference only)