Click to expand full text
RT9728A
120m, 1.3A Power Switch with Programmable Current Limit
1 General Description
The RT9728A is a cost-effective, low-voltage, single P-MOSFET high-side power switch IC for USB applications with a programmable current limit feature. This IC features a low switch-on resistance (typically 120m) and a low supply current (typically 120A). The RT9728A offers a programmable current-limit threshold ranging from 75mA to 1.3A (typical) via an external resistor, With a ±10% current limit accuracy across all current limit settings. In addition, a flag output is available to indicate fault conditions to the local USB controller. Furthermore, the IC also integrates an embedded delay function to prevent misoperation due to high inrush current.