LM5070MTCX-50 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments LM5070MTCX-50 is a current-mode PWM switching controller for Power-over-Ethernet applications, operating from a nominal 48 V input with a maximum of 75 V in a 16-pin SOP package. Integrates PoE powered-device classification and inrush control to simplify IEEE 802.3af-compliant designs. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- LM5070MTCX-50 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM5070MTCX-50?
- Current-mode PWM control with 1.8 V to 75 V input range and 48 V nominal operation for IEEE 802.3af PoE powered-device designs
- Integrated PoE classification and inrush current limiting reduces external component count in LAN-powered endpoints
- 16-pin SOP package enabling compact board layouts for IP phones, wireless access points, and network cameras
What is LM5070MTCX-50 used for?
The LM5070MTCX-50 is designed for Power-over-Ethernet powered devices such as IP phones, Wi-Fi access points, and PoE-enabled security cameras that draw power from a 48 V LAN infrastructure. Its current-mode PWM architecture with a 75 V maximum input handles transients from long Ethernet cable runs, making it robust in enterprise network deployments. The integrated classification circuitry simplifies compliance with IEEE 802.3af standards and reduces the BOM for PoE front-end power converters.
What are the specifications of LM5070MTCX-50?
| Pbfree Code | No |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 75V |
| Input Voltage-Min | 1.8V |
| Input Voltage-Nom | 48V |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 0.8A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Supply Current-Max (Isup) | 3mA |
| Surface Mount | YES |
| Switcher Configuration | SINGLE |
| Switching Frequency-Max | 665kHz |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | TIN LEAD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM5070MTCX-50 datasheet?
LM5070MTCX-50 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM5070MTCX-50?
Compatible alternatives and drop-in replacements for LM5070MTCX-50:
Switching Controller, Current-mode, 0.8A, 665kHz Switching Freq-Max, BICMOS, PDSO16
Switching Controller, Current-mode, 0.8A, 665kHz Switching Freq-Max, BICMOS, PDSO16
Frequently Asked Questions
What input voltage range does LM5070MTCX-50 support, and how does it handle 48 V PoE transients?
The LM5070MTCX-50 operates from 1.8 V minimum up to 75 V maximum, with a nominal 48 V design target for IEEE 802.3af Power-over-Ethernet. The 75 V rating provides headroom above the 57 V open-circuit PoE supply voltage plus cable transients, protecting downstream DC-DC stages without requiring an external TVS diode in most standard Ethernet cabling scenarios.
How does the current-mode PWM control in LM5070MTCX-50 benefit PoE powered-device designs?
Current-mode control provides inherent cycle-by-cycle peak current limiting, which clamps inrush current during capacitor charging at power-up to values typically below 400 mA on a 48 V rail. This protects the Ethernet port power-sourcing equipment and ensures compliance with IEEE 802.3af inrush specifications without additional soft-start components. The fast current loop also improves line transient response when PoE input voltage varies between 37 V and 57 V.
Which end products benefit most from the LM5070MTCX-50's integrated PoE classification feature?
IP desk phones, PoE-powered wireless access points, and network surveillance cameras benefit most because their power class must be signaled to the switch during the detection handshake. LM5070MTCX-50's on-chip classification resistor selection covers Class 0 through Class 3 devices (up to 15.4 W), eliminating a discrete classification resistor and reducing PCB area by approximately 30 mm² in a typical compact network endpoint design.
What package does LM5070MTCX-50 use, and what are the key PCB layout considerations?
The device uses a 16-pin SOP package (JESD-30 code R-PDSO-G16) with 1.27 mm pin pitch. When laying out the PCB, place the bootstrap and VCC bypass capacitors of at least 100 nF within 3 mm of the respective pins to minimize high-frequency switching noise. Route the current-sense resistor traces as a Kelvin pair to preserve accuracy at the 75 V maximum input, and keep the gate drive loop area below 200 mm² to reduce radiated emissions.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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