LINEAR TECHNOLOGY DC1472A Evaluation Board, 6A High Efficiency Synchronous Buck Regulator, 500kHz Switching Frequency
The demonstration board features LTM4618EV DC to DC µModule regulator. The LTM4618EV is a complete 6A output switching mode DC to DC power supply. Included in the IC package are the switching controller, power FETs, inductor and all support components. The DC1472A input range is from 4.5V to 26.5V and is capable of delivering up to 6A of output current. However, current derating may be necessary under certain VIN, VOUT, frequency and thermal conditions. The output voltage for board is jumper programmable from 1.2V to 5V and can be set as low as 0.8V, the reference voltage of LTM4618EV. Layout is simple, requiring only a few bulk input and output capacitors externally. The TRACK/SS pin allows user to program the output voltage ramp up and ramp down, as well as coincidentally or ratiometrically track an external voltage. The MODE jumper is available to select from pulse skipping or burst mode operation for improved efficiency at light load.
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- Default operating frequency of 500KHz
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- External clock synchronous frequency range from 250KHz to 750KHz
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- 88.7% efficiency
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- Output voltage tracking
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- ±1.75% maximum total DC error
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- Current mode control/fast transient response
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- Onboard frequency synchronization
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- Power good voltage indicator
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- Output overvoltage protection
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- Output current foldback limiting