LT3434IFE#PBF

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LT3434IFE#PBF DC DC Switching Regulators

The LT3434IFE#PBF DC DC switching regulator is a high step-up current-mode converter that combines a high efficiency switch, low RDSon control switch, and discrete MOSFETs as the four core components of a voltage regulator. It is particularly useful to design engineers in high current applications where the space is limited. The LT3434IFE#PBF is an integrated, 2A power converter offering multiple topologies for point of load (POL) applications. Featuring a wide input voltage range of 2V to 18V, the current mode switching regulator utilizes high power conversion efficiency and fast transient response technologies to provide a low cost, small form factor solution for low to medium power applications. With a power density of up to 19W/in3, the device is ideal for embedded applications where board space is at a premium.

Applications

The LT3434IFE#PBF is suitable for a wide range of applications, such as automotive and industrial systems, computers, distributed power supplies, telecommunications, and portable electronics. In such applications, it can be used to regulate the output of a rectifier or DC/DC power supply with a minimum number of components. Additionally, it can be used to power and protect sensitive integrated circuits (ICs).

Working Principle

The LT3434IFE#PBF works by efficiently converting DC input voltage into a controllable DC output voltage, while simultaneously providing galvanic isolation. The device features a current-mode, synchronous switching architecture combined with a power MOSFET switch, low RDSon control switch, and discrete MOSFETs that make up a complete voltage regulator.At the beginning of the cycle, the synchronous switch turns on, providing current to the load. The control switch then supplies gate current to the discrete power MOSFETs, which in turn turn on and draw current from the input source. The synchronous switch then turns off, allowing the control switch and power MOSFETs to draw more current to provide more output power. The process then repeats, ensuring a regulated DC output voltage.

Benefits

The LT3434IFE#PBF offers a number of benefits, including a high power conversion efficiency of up to 90%, fast transient response, low switching losses of less than 1mV, and low EMI permitted by a high-frequency (180kHz) operation. These features ensure reliable, high-performance and efficient operation. Additionally, the device offers an adjustable soft-start function that helps reduce inrush current and prolong the life of the electronic components.

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