LTC3528BEDDB#TRPBF

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PMIC - Voltage Regulators - DC DC Switching Regulators

The LTC3528BEDDB#TRPBF is an advanced synchronous step-down DC/DC-converter with internal power MOSFETs. It operates over an input voltage range of 2.6 V to 60 V and provides an adjustable output voltage from 0.6 V to 90% of the input. High efficiency is achieved by using a synchronous rectifier with an internal high-side switch driving a low side power MOSFET. The device allows for independent control of the low side and high side MOSFETs for optimum performance over a wide range of operating conditions. Other features include high output current up to 8 A, internal under voltage and over voltage lockout, selectable operating frequency, adjustable soft start and internal regulated loop compensation.

Application Field

The LTC3528BEDDB#TRPBF is designed for computer CPUs, TI Processors, and other fast dynamic loads. Its broad input voltage range of 2.6 V to 60 V allows power to be provided from either a 2 cell Li-Ion battery, which is commonly used in embedded applications, or other power sources. The step-down converter is capable of delivering higher output currents, up to 8 A, without the need for external components. This makes it especially suited for providing fast dynamic power response in highly integrated applications. The LTC3528BEDDB#TRPBF can also be used in automotive and motorcycle applications, where its portability, wide input voltage range, and 8 A output current are beneficial.

Working Principle

The LTC3528BEDDB#TRPBF uses an efficient synchronous rectifier architecture to monitor and adjust both the high and low side power MOSFETs to optimize efficiency over a wide operating range. The device switches at fixed frequency to ensure a stable output voltage with minimum ripple. The output voltage is adjustable via an external resistor divider and is settable between 0.6 V and 90% of the input voltage.

The LTC3528BEDDB#TRPBF includes several safety and protection features. These include an under voltage lockout circuit that prevents the power supply from entering abnormal operation if the input voltage drops below 2.6 V, as well as an overvoltage protection circuit that shuts down the output if the input voltage exceeds 60 V. It also includes a soft-start feature that prevents over-stressing the power stage upon startup. The device is protected against short-circuit conditions, and the output is current-limited.

The LTC3528BEDDB#TRPBF features a Freewheeling Diode Control (FDC) that lets the user choose whether or not to use an external diode. A selectable power-good signal allows simple system monitoring at the output. In addition, the device includes an auto-restart mode that automatically recovers from a fault condition without the need for manual reset.

In summary, the LTC3528BEDDB#TRPBF provides an advanced synchronous step-down DC/DC-converter with internal power MOSFETs and an adjustable output voltage range of 0.6 V to 90% of the input. The device offers high output currents up to 8 A, 0.90% peak efficiency, and is capable of operating over an input voltage range of 2.6 V to 60 V. It has several built-in protection features for safety and system monitoring and is suitable for embedded, automotive, and other applications where portability and high output current are needed.

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