LT3489EMS8E#PBF

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The LT3489EMS8E#PBF is a synchronous step-down switching regulator controller housed in a small 8-lead thin shrink small outline package (TSSOP). It provides an efficient, low-noise, compact, and cost-effective solution for a variety of portable applications, including laptop and handheld devices. This product belongs to the PMIC family - Voltage Regulators - DC DC Switching Regulators.

The LT3489EMS8E#PBF is designed to convert an input voltage range from 2.5V to 18V all the way down to a minimum 1.2V. It integrates an adjustable current limiting and thermal protection circuit using a single resistor, making it ideal for low-cost, high performance applications. It features a low quiescent current of 5uA in Shutdown mode, making the device ideal for battery-powered applications. It also features an integrated 0.4Ohm series switch for improved efficiency and low EMI generation.

The LT3489EMS8E#PBF can operate in various modes. In Continuous Conduction Mode (CCM), the regulator is capable of controlling the output voltage to within a 1% accuracy over a wide range of load currents. In Discontinuous Mode (DCM), the LT3489EMS8E#PBF works in a PFM (power factor modulation) fashion and provides excellent efficiency at light loads. This device can also operate in Burst Mode (BM) to provide even lower quiescent current mode of operation.

On the device\'s output stage, low-side MOSFETs are used for power conversion. Internal current-limit protection in the LT3489EMS8E#PBF will limit the load current that is going to a programmed current limit that is set with an external resistor. If the load current exceeds the maximum programmed current limit, the output will be disabled and the load disconnected from the output.

The LT3489EMS8E#PBF features an adjustable soft-start which limits the inrush current at power-up. It also features under voltage protection, over voltage protection, and over-temperature protection, offering a more secure device operation condition. The device also includes several output voltage tracking options to make clock synchronization easier.

The LT3489EMS8E#PBF is a highly integrated solution with low RDSON and tightly matched FETs, allowing designers to achieve very high efficiencies while minimizing the board footprint. It has high speed switching capabilities up to 3MHz and uses a PWM control loop to maximize efficiency while limiting noise peaks. In addition, the device operates over a wide temperature range with guaranteed performance across it.

In summary, the LT3489EMS8E#PBF is an efficient and low-cost solution for applications requiring a regulated output voltage ranging from 1.2V to 18V. Its advanced features and capabilities make it an ideal choice for applications requiring low quiescent current and high efficiency. It is well suited for DC/DC buck converters used in a variety of mobile, medical, consumer, and industrial applications.

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