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The ISL95870, ISL95870A, ISL95870B ICs are Single-Phase Synchronous-Buck PWM regulators designed by Intersil Technology . This regulators supports a wide range input voltage from 3.3V to 25V making them ideally for systems that run on battery or AC-adapter power sources.
This power supply circuit is based on the LTC3588-1 manufactured by Linear Technology and can be used in a variety of configurations.
The LTC3588-1 is a piezoelectric energy harvesting power supply IC that integrates a low-loss full-wave bridge rectifier with a high efficiency buck converter to form a complete energy harvesting solution optimized for high output impedance energy sources such as piezoelectric transducers.