DC1923A

LINEAR TECHNOLOGY DC1923A Demonstration Board for 15V, 200mA Synchronous Buck-Boost DC-DC Converter

The demonstration board features LTC3129-1 DC to DC converter. The LTC3129-1 is a high efficiency, 200mA buck boost DC to DC converter with a wide VIN and VOUT range. The DC1923A demonstration board has two user selectable operating modes, burst mode operation and fixed frequency PWM JP3. There is also an accurate programmable RUN pin which is used to ENABLE the converter JP1. The LTC3129-1 also incorporates a maximum power point control function which can be enabled JP2 for applications where the input source is a solar cell or is high impedance, such as intrinsically safe applications or high ZOUT thermal electric generators. The LTC3129-1 also features fixed output voltages with eight user selectable settings JP4, JP5, JP6. This allows the user to eliminate the output voltage divider and the associated bias current. The DC1923A operates with a 2.42V to 15V input voltage range and has been designed with the output voltage set to 5V.

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Regulates VOUT above, below or equal to VIN

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Single inductor

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1.3µA quiescent current

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Programmable maximum power point control

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1.2MHz ultralow noise PWM

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Current mode control

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Pin selectable burst mode operation

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Accurate RUN pin threshold

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Power good indicator

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10nA shutdown current