TPS254900-Q1

• AEC-Q100 Qualified With the Following Results:
  • Device HBM ESD Classification Level H2
  • Device CDM ESD Classification Level C5
• 4.5-V to 6.5-V Input Operating Range
• Integrated 45-mΩ (typ.) High-Side MOSFET
• 3-A Maximum Continuous Output Current
• V_BUS ±5% Cable Compensation Accuracy at Connector
• Supports USB BC 1.2 CDP and SDP Modes
• Short-to-Battery Protection on OUT, DP_IN, and DM_IN Pins
• DP_IN and DM_IN IEC 61000-4-2 Rated
  • ±8-kV Contact and ±15-kV Air Discharge
• 20-Pin QFN (3-mm × 4-mm) Package

The TPS254900-Q1 device is a USB charging-port controller and power switch with short-to-battery protection. This feature provides protection on OUT, DM_IN and DP_IN. These three pins withstand voltage up to 18 V. The internal MOSFET turns off quickly when the short-to-battery condition occurs. Rapid turnoff is very important to protect the upstream dc-dc converter, processor, or hub data lines.

The TPS254900-Q1 45-mΩ power switch has two selectable, adjustable current limits that support port power management by changing to a lower current limit when adjacent ports are experiencing heavy loads. This is important in systems with multiple ports and upstream power supplies with limited capacity.

The TPS254900-Q1 has a current-sense output that is able to control an upstream supply, which allows it to maintain 5 V at the USB port even with heavy charging currents. This feature is important in systems with long USB cables where significant voltage drops can occur with fast-charging portable devices.

A current monitor allows a system to monitor the load current in real time by monitoring the IMON voltage. The current monitor is very useful and can be used for dynamic port-power management.

The TPS254900-Q1 device also provides ESD protection capability per IEC 61000-4-2, level 4 on DP_IN and DM_IN.