LTC3528BEDDB-2#TRPBF

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The LTC3528BEDDB-2#TRPBF is a high-efficiency, synchronous step-down DC-DC regulator with an integrated PowerPath™ management. It features a low-noise, high-efficiency buck regulator controller, an integrated low-noise 25mA LDO regulator, an external p-channel MOSFET, and two integrated high-side N-channel MOSFETs. The device allows multipath management of incoming power in conjunction with a low-side N-channel MOSFET. The LTC3528BEDDB-2#TRPBF provides up to 1.5A of output current, a wide choice of operating frequencies, and adjustable soft-start, enabling the design of high-performance, high-efficiency power supplies.

Application Field:The LTC3528 is a synchronous buck regulator ideal for powering portable battery-powered applications, such as PDAs, cell phones, and PDAs. It has an input voltage range of 2.7V to 5.5V, allowing it to be configured as a step-down, step-up, or inverting converter. The device is also suitable for various other applications, including industrial, automotive and white goods.

Working Principle:The LTC3528 is based on a synchronous buck regulator topology. It takes a voltage from the input, and steps it down to attain a desired level at the output. The switching frequency of the regulator is programmable via the FREQ pin, or it can be synchronized to an external clock. The device uses a synchronous rectifier topology, featuring two N-channel MOSFETs, one as the high-side and one as the low-side devices. The two MOSFETs operate to allow the device to enter and operate in Auto-Skip mode when the current limit is exceeded. This helps to reduce their conduction losses, and improve efficiency.

The power stage of the LTC3528 is based on a voltage-mode voltage regulator topology. The voltage mode command pin (VMODE) allows the operating frequency to be adjusted to reduce switching losses. This also allows the device to achieve higher output currents under heavy load conditions. In addition, the output voltage can be adjusted externally by changing the value of the external resistor connected to the FB/SEL pin.

The LTC3528 features a wide range of features, including soft-start, efficient operation over a wide temperature range, and a low quiescent current. It also offers an adjustable cycle-by-cycle current limit, programmable soft-start, and adjustable undervoltage lockout. The device offers a wide choice of operating frequencies, allowing designers to optimize the size and efficiency of the applications. Furthermore, the device supports a temperature sense pin, allowing it to detect temperature changes and ensure a safe operating temperature.

The LTC3528BEDDB-2#TRPBF DC-DC switching regulator is an ideal solution for a wide range of battery-powered portable applications, such as mobile phones and PDAs. Its high-efficiency, wide input voltage range, and adjustable output voltage make it suitable for applications requiring continuous power or high-speed responses. Its easy-to-configure features and low quiescent current consumption make it an excellent solution for applications in which power efficiency is critical.

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