LTC3884IRHE#PBF

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LTC3884IRHE#PBF is a monolithic step-down regulator which integrates an oscillator, pulse width modulator (PWM), MOSFET drivers, high-side and low-side N-Channel MOSFETs, and two digital current sense amplifiers. Its main application field is in DC-to-DC power conversion. It is a type of power management integrated circuit (PMIC) which helps to regulate the voltage and current supplied by the power source and make use of the designed power delivered to the electronic load. It belongs to the category of DC-DCSwitching Controllers.

The LTC3884IRHE#PBF features a wide input voltage range from 7V to 42V and a 2.5V to 36V adjustable output voltage range. It offers programmable current limit for both high side and low side MOSFETs and output overvoltage protection. It also supports differential remote sensing, cycle-by cycle current limit, valley current limit, and an adjustable peak current limit. The part also includes an embedded skip mode, thermal shutdown protection, and adjustable soft start.

The LTC3884IRHE#PBF follows a synchronous fixed-frequency, valley current-mode control scheme, with a switching frequency and peak current limit adjustable up to 1.2MHz and 3.2A, respectively. It provides high-efficiency operation and ease of design of multi-phase and single phase DC-DC converter. The oscillator frequency and the peak current limit can be programmed externally in case the user needs different operating parameters. The part also requires no external bias winding and features an optional low component count.

As for the output overvoltage protection, it uses a shunt regulator with external current sense and synchronous rectifier MOSFETs. The output voltage is compared to the divided voltage on the voltage adjustable feedback pin. When the output voltage exceeds the reference voltage, the internal circuitry shuts off or re-establishes the overcurrent latch.

In addition, with its onboard features, the LTC3884IRHE#PBF can provide a stable output current even under harsh operating conditions. It also helps to reduce the size of the form factor and cost of system components due to its highly integrated feature set. Overall, it provides all the major circuit blocks needed for a DC-DC step-down power conversion design. Its wide input voltage range and adjustable output voltage, together with its high efficiency, make the LTC3884IRHE#PBF a popular choice for power management design in a variety of applications.

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