LTC3108 Breakout Board Pin Names and Function

Here's a list of the functions of the pins on the LTC3108 Breakout Board.

Pin Name                                            Function

V-IN                                          Input Voltage, range is 20 mV to 400 mV.

GND                                         Board Ground.

C-STORE EXTERNAL             Auxiliary External Storage Capacitor, positive side.

Discharge                                 Provides discharge path for storage capacitors if needed, e.g. taking                                                  board out of service.

VOUT                                       Output Voltage, set to 3.3V by design of the board.

VOUT2                                     Switched output 3.3V for sensors, etc  that don’t have a sleep mode,                                                  controlled by VOUT2_EN  (provides for MCU control of VOUT2).

VLDO                                       2.2 V power for MCU in sleep mode.

PGD                                         Power GooD  is high (2.2V) when VOUT is within 7.5% of 3.3 V,                                                             goes low (0V) when VOUT drops 9% below 3.3 V.

VOUT2_EN                              VOUT2 enabled when high, 5M internal pulldown resistor. 

 Here is how the pins on the board relate to the block diagram of the LTC3108 (click to enlarge).