LT1575CN8-1.5

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LT1575CN8-1.5 is a monolithic DC-to-DC converter and voltage regulator controller developed by Linear Technology Corporation. It allows the design of a cost-effective, small size and high power density with easily implemented control systems. The device has integrated bootstrap control for galvanic isolation bipolar power supplies, as well as a low-noise and fast transient response, wide range of output voltage up to 20V and up to 1.5 Amp peak current. It is suitable for many applications such as medical, automotive and computing.

The LT1575CN8-1.5 utilizes a typical linear voltage regulator architecture with the addition of protection circuitry and reference circuitry. It has an input voltage of 5.5V to 32V, a 200mV reference voltage which is adjustable, and an output current of 0.2A to 1.5A, adjustable with an external sense resistor. A frequency of up to 750 kHz can be set with an external resistor. Comparators are employed to monitor the output voltage and the current limit. The device also features shutdown and thermal protection, under voltage lockout and soft-start, which adjusts the power-on behavior.

The key application of LT1575CN8-1.5 is its ability to create isolated high-power DC/DC converter designs. The device reduces the system complexity of an isolated power supply by increasing the power density, reducing the number of parts as well as board space. The voltage regulator has a minimal dropout voltage, which enables the highest efficiency possible and extended output voltage range. In addition, the device can deliver high efficiency and good transient response with minimum output capacitance.

The LT1575CN8-1.5 also provides negative output voltage capability when used with a simple negative voltage multiplier. It is suitable for LED lighting applications, industrial motor drives, wireless communication systems, power MOSFETs, and high voltage DC/DC converters. It also allows designers to adjust the frequency, adding flexibility when designing power supplies.

The LT1575CN8-1.5 utilizes a linear regulator controller that provides a wide control loop bandwidth with fast loadtransient response and very low output voltage ripple. It also offers a wide range of input voltages, adjustable output voltage range and high power density. This device is ideal for various isolated voltage regulator applications in automotive, industrial and computing system designs.

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