DC2129A

Demonstration circuit 2129A features the LTC®3119, an 18V, 5A synchronous buck/boost DC/DC converter. The DC2129A has been designed for an input voltage range of 2.5V to 18V with an output voltage (VOUT) set to 5V. For VIN <gt/> 5V the output current can be as high as 5A. The unique 4-switch, single inductor architecture provides low noise and seamless operation from input voltages above, below, or equal to the output voltage. The LTC3119 features selectable PWM or Burst Mode® operation, and an easily synchronizable oscillator. A jumper JP3, is provided to select the operating mode. A clock signal can also be applied to JP3 if synchronization is desired. The demo board is configured for a switching frequency of 750KHz. Jumper JP1 is provided to enable the converter. Resistors R8 and R9 can be used to set an accurate turn-on voltage of the converter.

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