DC1400A

LTM4608AEV DC to DC Converter and Switching Regulator Chip 0.6VDC to 3.3VDC Output Demonstration Circuit

The demonstration board features LTM4608AEV high efficiency, high density µModule regulator. The LTM4608AEV is a complete 8A switch mode DC to DC power supply with ±1.75% total output voltage error. Included in the IC package are the switching controller, power FETs, inductor and all support components. The input voltage range is 2.5V to 5.5V. The output voltage is jumper selectable from 0.6V to 3.3V. The rated load current is 8A although derating is necessary for certain VIN, VOUT and thermal conditions. The LTM4608AEV offers a novel phase shift clock output to support current sharing with other regulators. The TRACK/SS pin allows the user to program output voltage ramp up and ramp down slew rate. The same pin also allows the output to coincidentally or ratiometrically track another voltage rail. The margining function is provided for users who wish to stress their systems by varying supply voltages during testing.

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Default operating frequency of 1.5MHz

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84.5% efficiency

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Output voltage tracking and margining

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Onboard frequency synchronization

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Power good tracks margining

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Multiphase operation

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Parallel current sharing

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Spread spectrum frequency modulation

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Selectable burst mode operation

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Current mode control/fast transient response