DC1821B

DC1821B is a demonstration circuit that features the LTC®3114-1, a wide operating range synchronous monolithic buck-boost converter with programmable average output current. The DC1821B demo board has two user-selectable operating modes: Burst Mode® operation and fixed frequency PWM (JP2). There is also an accurate programmable RUN pin which is used to ENABLE the converter (JP1). The LTC3114-1 uses average current mode control to simplify voltage loop compensation and provide good line and load transient response. The DC1821B operates with a 2.7V to 40V input voltage range. The demo board has been designed with the output voltage set to 5V. The LTC3114-1 incorporates a proprietary low noise switching algorithm which optimizes efficiency with input voltages above, below or equal to the output voltage and ensures seamless transitions between operating modes. In PWM mode, the LTC3114-1 operates at 1.2MHz to optimize small size with high efficiency operation.

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