The PT6004NETSP-AA is a 4-in-1 power management integrated circuit (PMIC) manufactured by CR-PowTech. It is packaged in a TSSOP-16 RoHS (Restriction of Hazardous Substances) compliant package. This PMIC is designed for portable or mobile applications, and helps to improve system power efficiency, reduce the number of components, and reduce board space. It integrates four PMICs: a step-up DC-DC converter, a low dropout (LDO) regulator, a Li+ battery charger, and a multiple lens safety switch. The step-up DC-DC converter supports outputs from 1.8 to 5.5V and can convert an input voltage as low as 0.9V. The LDO regulator also supports output voltages from 1.8 to 5.5V with an input voltage range of 2.2-12V. The battery charger supports Li+ batteries of 3.6V, nominal 4.2V. It is available with an input source of USB/microUSB, and its constant current/constant voltage topology enables a very low power consumption. Lastly, the multiple lens safety switch protects the battery from over-discharge and over-current.