1-Cell Battery Management IC, 4.2V Battery Pack Voltage, QFN Package

Battery Charger Li-Ion/Li-Pol 200mA to 1000mA 4.16V to 4.24V 10-Pin QFN T/R

Switching Regulator, Current-mode, 500kHz Switching Freq-Max, PDSO8, TSOT-23, 6 PIN
Adjustable DC/DC Controller, 800mV Output, 5A, 21V Input, QFN Package
Switching Voltage Regulators 16V, 4A, 600kHz Sync Step-down Converter
Adjustable 1-Channel DC/DC Controller, 2.7-6V Input, 800mV-5.4V Output, QFN Package
Switching Voltage Regulators 16V,3A, 600kHz Sync StepDown Converter