LM5070SD-80 Texas Instruments Integrated Circuit (Other) In Stock
Integrated Power over Ethernet PD interface and PWM controller with 48 V nominal input, 75 V max, and current-mode pulse-width modulation. Combines IEEE 802.3af PoE classification, inrush control, and DC-DC conversion in a single 16-pin package. Simplifies PoE-powered IP cameras, VoIP phones, and access points.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- LM5070SD-80 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 LM5070SD-80?
- Integrated IEEE 802.3af PoE PD interface with classification signature resistor eliminating external RJ-45 front-end components
- Current-mode PWM controller operating from 1.8 V to 75 V input supporting the full 48 V PoE supply range with transient headroom
- Built-in inrush current limiting during PoE hotplug events protecting both PSE switch port and the PD load
- Single-package integration of PD detection, classification, and DC-DC switching controller reducing BOM count versus discrete PoE front-end solutions
What is LM5070SD-80 used for?
The LM5070SD-80 is designed for IEEE 802.3af Power over Ethernet powered devices such as IP surveillance cameras, VoIP desk phones, and wireless access points that receive both data and up to 15.4 W of power over a single Cat-5 cable. By integrating the PoE PD interface and a PWM DC-DC controller, it eliminates the external discrete classification and detection components typically required, reducing total solution size and cost. The 75 V input rating also provides sufficient headroom for common PoE voltage transients on long Ethernet cable runs.
What are the specifications of LM5070SD-80?
| 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 | S-XDSO-N16 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 0.8A |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | SOLCC16,.2,20 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY 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 (Sn/Pb) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Package | Other |
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 LM5070SD-80 datasheet?
LM5070SD-80 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM5070SD-80?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What PoE standard does the LM5070SD-80 support and how much power can it deliver to the PD load?
The LM5070SD-80 implements the IEEE 802.3af Powered Device interface, which allows Power Sourcing Equipment to deliver up to 15.4 W at 48 V nominal to the PD port. The LM5070SD-80 handles the mandatory detection signature, classification handshake, and inrush current limiting required by the standard. This makes it suitable for Class 0 through Class 3 PD designs including IP cameras drawing up to 13 W and PoE access points consuming the full 12.95 W available at the PD output after cable losses.
How does current-mode PWM control in the LM5070SD-80 benefit PoE power supply stability?
Current-mode PWM control in the LM5070SD-80 provides inherent cycle-by-cycle overcurrent limiting and improved transient response compared to voltage-mode control. This is important in PoE applications because the 48 V input can experience voltage steps when multiple devices are connected to or disconnected from the same PoE switch port. The current-mode loop responds within a few switching cycles to such input transients, maintaining a stable 5 V or 12 V output for the powered device's internal circuitry without requiring a large output capacitor bank.
What is the maximum input voltage rating of the LM5070SD-80 and why does that margin matter for PoE systems?
The LM5070SD-80 is rated for a maximum input voltage of 75 V, while PoE nominal voltage is 48 V. This 27 V of margin accommodates worst-case PoE source voltages up to 57 V specified by IEEE 802.3af plus additional transients caused by cable inductance during hotplug events. Operating with less than 75 V rated devices in 48 V PoE systems risks controller damage during plug-in surges, so the LM5070SD-80's headroom is a key reliability factor for deployed infrastructure equipment.
When would an engineer choose the LM5070SD-80 over a discrete PoE PD controller plus separate PWM controller approach?
The integrated LM5070SD-80 reduces board area by eliminating the separate PoE classification IC, detection resistor network, and opto-isolator feedback that a discrete two-chip solution requires. For designs constrained to under 2 cm² of power stage area, such as miniature IP cameras with 25×25 mm PCBs, this integration is decisive. The single-package approach also reduces the number of vendor qualifications and inventory SKUs, which lowers supply chain cost in high-volume PoE device manufacturing.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
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.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit