RT9742
70mΩ/55mΩ, 3A/2.5A/2A/1.5A/1A/0.5A High-Side Power Switches with Flag
The RT9742 is a cost-effective, low-voltage, single N-MOSFET high-side Power Switch IC for USB application. Low switch-on resistance and low supply current are realized in this IC.
The RT9742 integrates an over-current protection circuit, a short fold back circuit, a thermal shutdown circuit and an under-voltage lockout circuit for overall protection.

GGJ5 == 1A
RT9080
- RT9080 - 2μA IQ, 600mA Low-Dropout Linear Regulator

RT8279
5A, 36V, 500kHz Step-Down Converter
https://www.richtek.com/assets/product_file/RT8279/DS8279-01.pdf
Features
- 5A Output Current
- Internal Soft-Start
- 110mΩ Internal Power MOSFET Switch
- Internal Compensation Minimizes External Parts Count
- High Efficiency up to 90%
- 25μA Shutdown Mode
- Fixed 500kHz Frequency
- Thermal Shutdown
- Cycle-by-Cycle Over Current Protection
- Wide 5.5V to 36V Operating Input Range
- Adjustable Output Voltage from 1.222V to 26V
- Available In an SOP8 (Exposed Pad) Package
- RoHS Compliant and Halogen Free