LTC3108-1 block DiagraM LTC3108-1 VOUT2 1.3Ω ILIM VOUT2 VOUT2_EN OFF ON 1.2V SYNC RECTIFY REFERENCE VREF 5M C1 VOUT 1:100 C1 VIN VOUT CIN 5.25V COUT C2 + C2 VS1 – SW SW V OUT CHARGE VOUT CONTROL VS2 VSTORE PROGRAM 0.5Ω VREF VLDO 1M PGD – PGOOD + VAUX VSTORE V V BEST LDO OUT VREF 1µF C GND (SSOP) EXPOSED PAD (DFN) VLDO STORE 31081 BD 2.2V 2.2µF operaTion (Refer to the Block Diagram) The LTC3108-1 is designed to use a small external step-up average power draw is very low, but there may be periodic transformer to create an ultralow input voltage step-up pulses of higher load current required. This is typical of DC/DC converter and power manager. It is ideally suited wireless sensor applications, where the quiescent power for low power wireless sensors and other applications in draw is extremely low most of the time, except for transmit which surplus energy harvesting is used to generate system bursts when circuitry is powered up to make measure- power because traditional battery power is inconvenient ments and transmit data. or impractical. The LTC3108-1 can also be used to trickle charge a standard The LTC3108-1 is designed to manage the charging and capacitor, supercapacitor or rechargeable battery, using regulation of multiple outputs in a system in which the energy harvested from a Peltier or photovoltaic cell. 31081fb 8 For more information www.linear.com/LTC3108-1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration order information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts
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