Digi-Key's Reference Design Library is full of technical blueprints that have been designed and verified to solve system-level problems and reduce time to market.
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The EPC9528 module is programmed as a Buck converter by default. To change to Boost converter, please re-program the module with the boost firmware available at the EPC website. Using the incorrect firmware could result in damage.
The IS32LT3178-STLA3-EB is a adjustable linear current devices with excellent temperature stability. A single resistor is all that is required to set the operating current from 10mA to 150mA (the SOP-8-EP package can deliver up to 200mA). The devices can operate from an input voltage from 2.9V to 40V with a minimal voltage headroom of 1.0V (Typ.) at 150mA.