DC1587A

Demonstration circuit 1587A is a boost converter optimized for relatively high impedance, very low voltage input power sources. It allows a user to quickly evaluate the LTC3105 boost converter and LDO regulator. Capable of operating with an input voltage as low as 250mV and as high as 5V, the circuit features maximum power point control (MPPC). Jumpers on the circuit board allow the user to select several MPPC voltages, three boost output voltages and three LDO regulator output voltages. Also included are jumpers for shutdown and for selecting an external pull-up voltage for the power good status output. Terminals are provided for input and output connections, power good output and external power good supply input, shutdown input, and provisions for external MPPC resistor and MPPC diode input. This demonstration board is especially designed for low power solar cell applications.

• Start-up input voltage of 250mV typical (no load, RMPPC = 22K, supply ESR = 0.5ohm)
• Input voltage range of 0.2V to 5V (after start-up)
• Maximum boost output current of 125mA (VIN = 2V, VOUT = 5V, MPPC = 2V, resistive load)
• 5V boost output voltage of 5V ±3% (VIN = 1.5V, 100 ohm load)
• 3V LDO output voltage of 3V ±3% (VIN = 1.5V, 500 ohm load)

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