LTC3118HFE#PBF

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Analog Devices Inc. recently released the LTC3118HFE#PBF integrated circuit, which falls within the PMIC (Power Management Interconnect Chip) class of components. The circuit is labelled as falling within the Voltage Regulators, DC DC Switching Regulators subcategory. This type of device is intended to be used in applications where power must be either stepped down or stepped up, depending upon the specific requirements of the project. In particular, the LTC3118HFE#PBF is intended for applications requiring low power output and for reverse polarity compatibility in a half-bridge topology. It also provides the capability for Synchronous Rectification of the current, allowing for more efficient power conversion.

The LTC3118HFE#PBF has on-chip MOSFETs and a sense resistor, which allows for either step-down or step-up voltage conversion. The circuit has a 16-to-40V DC input voltage range, rated for use at up to 3A, and adjustable output voltages from 0.6V minimum to 42V maximum. To protect the converter, on-chip overcurrent, overvoltage and thermal protection circuits are included. Additionally, the LTC3118HFE#PBF features low quiescent current and low ripple, along with an internal anti-ringing circuit which prevents voltage resonance during the switch transistor switching cycle.

The LTC3118HFE#PBF is a synchronous buck-boost DC/DC converter which eliminates the need for multiple converters or an additional boost inductor. Its wide input voltage range and adjustable output voltage make it ideal for a variety of applications including automotive systems, industrial equipment, and battery charging. The wide input voltage range also allows for a reduction in power-supply costs and footprint area. The LTC3118HFE#PBF is easy to use, where all that is required for the adjustment of the output voltage is a single external resistor. Additionally, the device does not require any compensation components.

The LTC3118HFE#PBF’s internal voltage regulation circuitry is quite complex, with a range of sensing, feedback, and timing components working together to ensure reliable power delivery while providing fast transient response. The device consists of an internal switch and synchronous rectifiers which control the voltage output level, following a PWM-based switching scheme to regulate the feedback loop. The PWM frequency of the converter can be adjusted via the CTRL pin. The frequency is directly proportional to the external resistor connected to the CTRL pin, allowing for both high and low frequency operation.

The LTC3118HFE#PBF has a wide range of features, but what really makes it stand out from the competition is its flexibility and its ability to support a variety of applications. The device requires no external components, the voltage output is adjustable over a wide range, and it offers low quiescent current and low ripple. All of these features make the LTC3118HFE#PBF the ideal choice for low power solutions.

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