TPS2042BD

Power Distribution Switches, Load Drivers Overview

The TPS2042BD is a dual-channel USB power distribution switch manufactured by Texas Instruments. It operates within a supply voltage range of 2.7 V to 5.5 V and features two independent outputs with a maximum continuous output current of 500 mA per channel. The device incorporates a fixed current limit of 900 mA to protect against overcurrent conditions. Key electrical parameters include a maximum on-resistance of 95 mΩ, a maximum turn-on time of 20 ms, and a maximum turn-off time of 40 ms. It is designed for surface-mount installation in an SOIC-8 package and supports an operating temperature range from -40°C to +85°C.

Power Distribution Switches, Load Drivers Feature Summary

• Dual-channel architecture providing independent control of two power distribution lines via active-low enable inputs.
• Integrated fixed current limiting protects downstream loads and the source from overcurrent faults.
• Low on-resistance minimizes power dissipation and voltage drop during normal operation.
• Built-in thermal shutdown safeguards the device against excessive heat generation under fault conditions.

Power Distribution Switches, Load Drivers Applications

• USB hub power distribution circuits
• Portable consumer electronics power management
• Industrial equipment peripheral power switching

Power Distribution Switches, Load Drivers Procurement Notes

Verify the specific suffix 'BD' corresponds to the standard commercial grade SOIC-8 package when sourcing. Confirm that the required current limit matches the 900 mA specification, as other variants like the BQDRQ1 offer different limits. Ensure the design accommodates the 20 ms turn-on delay for hot-plug applications. Check RoHS compliance status if environmental regulations are critical for the target market.

Power Distribution Switches, Load Drivers Selection Notes

Select this component when dual-channel power switching is required within the 2.7 V to 5.5 V range. The 900 mA current limit suits applications needing higher surge tolerance than the 500 mA continuous rating. Consider the SOIC-8 package for standard PCB layouts. Evaluate the 95 mΩ on-resistance against thermal requirements. Compare against the TPS2042B series if automotive qualification or lower resistance is needed instead.

Power Distribution Switches, Load Drivers Part Context

This part belongs to the TPS204x family of USB power switches from Texas Instruments. It shares functional similarities with single-channel variants like the TPS2041 but provides dual outputs. The 'BD' designation typically indicates the commercial temperature grade and SOIC-8 packaging, distinguishing it from automotive qualified versions or alternative packages like DG4.

Power Distribution Switches, Load Drivers Replacement Considerations

The TPS2042BDG4 is a lead-free version of the same device. For automotive applications, consider the TPS2042BQDRQ1, which offers AEC-Q100 qualification and a 1 A current limit. The TPS2042AD provides similar functionality with an 80 mΩ on-resistance but has a restricted operating temperature range starting at 0°C.