TPS2370PW

Specialized Overview

The TPS2370PW is an integrated power interface switch for IEEE 802.3af Powered Devices (PDs) manufactured by Texas Instruments in an 8-pin TSSOP package. It operates within a recommended input voltage range of 44 V to 57 V and supports an operating junction temperature from 0°C to 70°C. The device features an internal 0.3-Ω low-side FET, programmable inrush current limiting via an external resistor, and interfaces directly with DC/DC converter soft-start circuits. Electrical characteristics include a sleep current of 180 µA to 300 mA during startup and thermal shutdown protection at 144°C.

Specialized Feature Summary

• Performs complete detection and classification protocols required for IEEE 802.3af compliance
• Integrates a low-side pass FET for efficient power path control
• Provides programmable inrush current limiting to accommodate large load capacitance
• Interfaces with DC/DC converters to manage soft-start sequencing

Specialized Applications

• VoIP Phones
• Internet Appliances
• Wireless LAN Access Points
• Bluetooth Access Points

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm the exact packaging configuration, such as tube or tape-and-reel quantities. Confirm that the component status aligns with long-term availability requirements for the intended production timeline.

Specialized Selection Notes

Select this component when designing a Powered Device requiring full IEEE 802.3af protocol handling without external discrete logic. Ensure the application environment remains within the specified 0°C to 70°C operating temperature range and that the PCB layout accommodates the thermal dissipation limits of the TSSOP package.

Specialized Part Context

This part belongs to the TPS237x family of Power over Ethernet interface switches. While it handles standard PD signaling, newer designs may utilize variants like the TPS2372 or TPS23730 which support higher power classifications such as IEEE 802.3bt Type 3.

Specialized Replacement Considerations

Public confirmed substitute part numbers: None identified.