LINEAR LT3970-Series-40V,-350mA-Step-Down-Regulator-with-2.5μA-Quiescent-Current-and-Integrated-Diodes
LTC3554/LTC3554-1/LTC3554-2/LTC3554-3 --Micropower-USB-Power-Manager-with-Li-Ion-Charger-and-Two-Step-Down-Regulators