The ADM7171 is an ultra-low noise, low dropout linear regulator (LDO). This IC has a high-power supply rejection ratio which helps to reduce noise in high frequency circuits. it can provide 1A continuous current and it operates from 2.3 V to 6.5 V.
The NCP3170 is a synchronous buck regulator with integrated switching elements. It has a wide Input Voltage Range from 4.5V to 18V and it can deliver up to 3A output current. The NCP3170 uses current mode control for fast transient response and easy loop compensation.
The MAX8903 is a dual-input charger which supports separate DC and USB inputs. This switch mode charger uses high-speed switching to eliminate heat and decrease external components.