LM5070MTCX-50/NOPB

Overview

The LM5070MTCX-50/NOPB is an integrated Power over Ethernet (PoE) Powered Device (PD) interface and PWM controller manufactured by Texas Instruments. Designed for IEEE 802.3af compliance, this component combines a PD interface with a high-voltage buck converter in a single package. It operates within a supply voltage range of 1.8 V to 75 V and supports switching frequencies up to 665 kHz. The device features a maximum duty cycle of 80% and includes an internal power switch with a maximum on-resistance of 2.2 Ohms. It is housed in a 16-pin TSSOP package and functions reliably across an operating temperature range from -40°C to +125°C.

Feature Summary

• Integrates a complete PoE Powered Device interface with a high-voltage synchronous buck DC/DC converter
• Supports IEEE 802.3af standard classification and detection protocols
• Includes internal high-side and low-side MOSFETs for efficient power conversion

Applications

• Power over Ethernet powered endpoints
• IP cameras and video surveillance systems
• Wireless access points and network infrastructure devices

Procurement Notes

Verify the specific suffix 'MTCX' indicates tape-and-reel packaging when sourcing. Confirm the '-NOPB' designation ensures lead-free and RoHS compliance status. Cross-reference the exact part number against the manufacturer's current lifecycle status to ensure availability and confirm no obsolescence notices apply to this specific variant.

Selection Notes

Select this component for designs requiring a compact solution that merges PoE interface logic with power regulation. Ensure the application input voltage aligns with the 1.8 V to 75 V operational range. Verify that the thermal requirements of the TSSOP-16 package are met for the intended load conditions and ambient temperatures.

Part Context

This part belongs to the LM5070 family of integrated PoE controllers. It serves as a monolithic solution for powering Ethernet-based devices, eliminating the need for separate interface and regulator ICs. The family provides standardized compliance with IEEE 802.3af standards while reducing board space and component count in network equipment designs.

Replacement Considerations

LM5070MTCX-80/NOPB: Offers similar functionality but may differ in classification or pinout specifics; verify datasheet compatibility before substitution.