LTC3633AEUFD-3#PBF

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The LTC3633AEUFD-3#PBF is a synchronous buck switching regulator that provides adjustable regulated output voltages for a wide range of applications. It is part of the Linear Technology Corp.’s LTC DC/DC switching regulator portfolio. This device is a non-regenerative buck regulator with a maximum switching frequency of 1.6 MHz and 0.5 amp current limit, providing superior current and power regulation and fast transient response. The LTC3633AEUFD-3#PBF features a wide 4.5V to 30V input voltage range, an adjustable 0.6V to VIN output voltage, and a wide 0.5A to 10A DC current limit range. It utilizes a single inductor and requires only a few external components.

The specific application field and working principle of the LTC3633AEUFD-3#PBF can be divided into two parts. First, it is mainly applied in power system designs such as distributed power systems, battery charging solutions, DC/DC converters, and step-down regulators. In such designs, it can use its 0.5A to 10A DC current limit to accurately control the output current, and its wide 4.5V to 30V input voltage range to generate regulated output voltages from 0.6V to VIN. Second, the working principle of LTC3633AEUFD-3#PBF is based on a non-regenerative buck switching converter with an adjustable output voltage. In this kind of converter, the current limit is set by the output voltage, input voltage, voltage regulator’s feedback loop, and the inductor’s value. The device senses the input voltage and uses an internal voltage reference to compare against a voltage-setting resistor to adjust the output voltage. When the sense voltage reaches the output level, the converter stops supplying current, and the load is suppressed. The switch is turned on or off based on the detected voltage, allowing the converter to operate in synchronous or discontinuous mode depending on the load and input voltage.

The LTC3633AEUFD-3#PBF provides superior performance in adjustable output voltage power system designs. Its main advantages are the wide input voltage range, very high efficiency, fast transient response, and low quiescent current. Its current and power regulation ensures that the output current and power remains stable over various input/load conditions. Its current limit has a wide range of 0.5A to 10A, enabling more design flexibility. The device also features self-protection functions such as overvoltage lockout (UVLO), thermal shutdown (TSD), and over-temperature protection (OTP). All these features make the LTC3633AEUFD-3#PBF an ideal solution for a number of portable, mobile, and distributed power systems applications.

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