LTC3115HFE-2#PBF

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LTC3115HFE-2#PBF is a versatile DC/DC converter, designed to jump or buck a high voltage input supply to a programmable low voltage output voltage with an output current up to 2A. The chip is a synchronous buck-boost regulator of the switching form that can deliver up to 20A continuous and 25A with an appropriate heat sink. Designed with a wide input voltage range, the LTC3115HFE-2#PBF is capable of regulating input voltages from 4.5V to 42V, making it suitable for a wide range of power applications in industrial, automotive and consumer electronics.

The LTC3115HFE-2#PBF offers various features and protection circuitry to further enhance its performance. Low operating quiescent current of 1.5mA activates the device in shutdown mode and allows for low power operation of the chip. It operates at <1.5V and a current of <500nA. The chip also features a fault protected logic enable, a power good indicator, over voltage protection, and under voltage lockout. In addition, output voltage is adjustable via an external resistor, allowing it to supply different levels of current as needed.

Due to its wide input voltage range, competitive price and its protection circuitry, the LTC3115HFE-2#PBF can be found in a variety of power applications. It is used in portable power applications such as laptops, cell phones and tablets, as well as in automotive, industrial, and telecommunications applications. This DC/DC buck-boost switching regulator provides up to 20A continuous current and 25A with an appropriate heat sink. With the adjustable output voltage, high switching frequency, and wide input voltage range, the LTC3115HFE-2#PBF helps improved system efficiency and performance.

The LTC3115HFE-2#PBF is available in a small 8-pin, 2.16mm x 2.1mm TDFN package, which makes it ideal for space-constrained applications. The chip is designed to deliver a precise output voltage that is selectable above or below the input voltage by an external resistor, with an adjustable switching frequency that ranges from 200 kHz to 2.2 MHz. This chip also features a fixed minimum frequency, current-mode control and fixed-frequency operation for precise power delivery in the audio, video and communication applications.

The chip works on the principle of a synchronous buck-boost converter. It includes an on-board driver, Power MOSFET, current sensing circuit and error amplifier. The internal driver senses a voltage drop across the sense resistor and controls the switching of the internal MOSFET; it also produces a duty cycle circuit that varies the duty cycle of the MOSFET to adjust the output current. The current sensing circuitry senses the current going into the load and adjusts the voltage to maintain the desired current. The error amplifier maintains the output voltage by sensing and regulating the output voltage against a preprogrammed reference value.

In summary, the LTC3115HFE-2#PBF is a versatile DC/DC converter suitable for applications needing a high voltage input supply and a wide range of output voltages. Its easy to use protection circuitry, adjustable output voltage, and wide input voltage range make it ideal for many power applications. Its compact footprint makes it suitable for space-limited applications.

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