DC1669A

LINEAR TECHNOLOGY DC1669A Evaluation Board, 15A Buck Regulator, Input 4.5V-20V, Output 0.6V-5V, 15A

The demonstration circuit features LTM4627EV DC to DC µModule regulator. The LTM4627EV is a complete 15A output high efficiency switch mode DC to DC power supply. Included in the IC package are the switching controller, power FETs, inductor and compensation components. The LTM4627EV has an operating input voltage range of 4.5V to 20V and is able to provide an output current of up to 15A. The output voltage is programmable from 0.6V to 5V and can be remotely sensed with the internal optional differential remote sensing amplifier. This regulator is internally compensated and employs constant frequency current mode architecture, enabling a fast transient response and stable control loop over a wide range of output capacitance. It supports frequency synchronization and burst mode operation for increased light load efficiency. Output voltage tracking is also available through the TRACK/SS pin for supply rail sequencing.

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Default operating frequency of 500KHz

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External clock synchronous frequency range from 250KHz to 770KHz

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86.6% efficiency

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±1.5% total DC output error

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Differential remote sense amplifier for precision regulation

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Current mode control/fast transient response

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Frequency synchronization

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Parallel current sharing up to 60A

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Selectable pulse skipping or burst mode operation

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Soft start/voltage tracking