My Inquiry
My Account
Texas Instruments LM5056APMHE/NOPB
- Part No.:
- LM5056APMHE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM5056APMHE/NOPB.pdf
- Description:
- IC SUPERVISORY/SYS MGMT 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,179
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM5056APMHE/NOPB from Texas Instruments is a high-voltage system power management IC with PMBus™ interface, designed for real-time telemetry in 48-V backplane systems. It measures VIN (10–80 V), IIN (±1.25% accuracy), PIN (±1.75%), VOUT, VAUX, and remote temperature with 12-bit ADC and 1-kHz sampling. It serves as a digital telemetry hub in server power distribution and industrial telemetry applications.
For engineers reviewing the LM5056APMHE/NOPB datasheet, LM5056APMHE/NOPB pinout, LM5056APMHE/NOPB application, or LM5056APMHE/NOPB equivalent, this device delivers calibrated input power monitoring, programmable WARN/FAULT thresholds, black-box telemetry capture, and SMBus-compliant command structure - all critical for high-reliability power system management.
Technical Context
The LM5056APMHE/NOPB integrates a 12-bit SAR ADC with simultaneous VIN/IIN sampling to enable true real-time input power calculation. Its analog front-end includes dedicated current-sense amplifier inputs (VIN_K/SENSE) supporting ±3.0 V differential range and selectable full-scale voltage (27.0 mV or 54.4 mV via CL pin).
It implements a PMBus-compliant SMBus interface with address configuration via ADR0–ADR2 pins, SMBA alert output, and hardware-based black-box snapshot triggered by WARN or FAULT events. The device operates across –40°C to +125°C junction temperature and requires external 5.0 V ±10% VDD supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 10 V to 80 V - supports standard telecom and server backplane rails including +48 V nominal systems. |
| Current Measurement Accuracy | ±1.25% - enables precise load profiling and overcurrent detection without external calibration. |
| Power Measurement Accuracy | ±1.75% - achieved via synchronized VIN/IIN sampling, critical for energy accounting and efficiency validation. |
| ADC Resolution & Rate | 12-bit / 1 kHz - provides sufficient dynamic range and temporal resolution for trending and fault diagnostics. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and base station environments with extended thermal margins. |
| VDD Supply Requirement | 5.0 V ±10% - mandates stable external bias rail; internal digital logic and SMBus I/O depend on this supply. |
| Remote Temp Sensing | ±2°C accuracy using MMBT3904 diode - supports thermal protection of power stages without dedicated sensor ICs. |
Pinout & Package
LM5056APMHE/NOPB is housed in a thermally enhanced 28-pin HTSSOP package with exposed pad soldered to PCB ground plane for optimal thermal dissipation (θJCbot = 2.9°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Auxiliary HV telemetry input | Measures VOUT or other system voltages up to 80 V; enables dual-rail monitoring without additional dividers. |
| SENSE (Pin 3) & VIN_K (Pin 4) | Differential current sense inputs | Accept Kelvin-connected sense resistor; ±3.0 V common-mode range prevents damage during transients. |
| VIN (Pin 5) | Main input supply and telemetry source | Monitored directly for voltage and used as reference for power calculations; POREN threshold at 8.7 V enables controlled startup. |
| SDAO/SDAI/SCL/SMBA (Pins 11–14) | SMBus physical layer interface | Supports PMBus commands (e.g., READ_VIN, READ_IIN, OT_WARN_LIMIT); SMBA asserts active-low on threshold violation. |
| CL (Pin 22) | Current sense full-scale select | Hardware-selectable 27.0 mV or 54.4 mV FSR - sets measurement range before firmware initialization. |
| DIODE (Pin 16) | Remote temperature diode driver | Sources 9.4 µA DC + 250 µA pulse for diode-junction temp sensing; requires low-parasitic layout to maintain ±2°C accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| True input power measurement | Simultaneous VIN/IIN sampling eliminates time-skew error - essential for accurate watt-hour accumulation in metering applications. |
| Programmable WARN/FAULT thresholds | Configurable per-parameter limits (voltage, current, power, temp) with SMBA assertion - enables autonomous system-level fault response. |
| Black-box telemetry capture | Stores pre-fault telemetry snapshot (VIN, IIN, PIN, VOUT, temp, status) in volatile memory - accelerates root-cause analysis after event. |
| 12-bit telemetry averaging | Configurable interval (0.001 s to 4 s) for smoothed parameter reporting - reduces noise impact while preserving transient visibility. |
| Remote diode temperature sensing | Integrated current source and ADC channel for MMBT3904 - eliminates need for external temp sensor and associated signal conditioning. |
Applications
| Server Backplane Systems | Base Station Power Distribution |
|---|---|
Use Scenario: Real-time monitoring of +48 V input bus feeding multiple blade servers. IC Role / Device Role / Timing Role: Telemetry hub measuring VIN, IIN, PIN, and VOUT per slot; triggers SMBA on overcurrent or undervoltage. Use Value: Enables predictive maintenance and dynamic load balancing via PMBus-hosted telemetry streams. |
Use Scenario: Power health monitoring in distributed radio unit (DRU) cabinets with mixed 48 V and auxiliary rails. IC Role / Device Role / Timing Role: Input power supervisor with black-box capture on brownout events; logs pre-fault conditions for field diagnostics. Use Value: Reduces mean time to repair (MTTR) by preserving telemetry context before shutdown. |
| Industrial Telemetry Applications | High-Reliability Telecom Equipment |
Use Scenario: Remote monitoring of DC power feeds in SCADA-controlled substations. IC Role / Device Role / Timing Role: Standalone telemetry node reporting VAUX, temperature, and averaged PIN over RS-485 gateway. Use Value: Provides calibrated, timestamped power data without host processor dependency - ideal for edge-deployed gateways. |
Use Scenario: Power integrity verification in carrier-grade optical line terminals (OLTs) with strict uptime requirements. IC Role / Device Role / Timing Role: Fault-logging agent capturing VIN, IIN, and die temperature during thermal stress tests. Use Value: Validates thermal derating models using actual silicon-level measurements under load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage telemetry applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5056PMHE/NOPB | ±1.5% current accuracy and ±2.25% power accuracy; otherwise identical pinout, features, and interface. | Lacks the tighter accuracy specs required for revenue-grade power metering or precision thermal correlation. | Select LM5056PMHE/NOPB only when cost sensitivity outweighs ±0.25% current/±0.5% power accuracy requirements. |
| MAX34451ETL+ | 16-bit ADC, wider VIN range (4.5–80 V), integrated EEPROM, but no remote diode sensing or black-box capture. | Targets higher-precision lab equipment and test fixtures where long-term calibration stability matters more than field fault logging. | Choose MAX34451ETL+ when 16-bit resolution and nonvolatile configuration storage are prioritized over thermal fault autonomy. |
Compared with LM5056PMHE/NOPB, the LM5056APMHE/NOPB delivers superior metrology for closed-loop power control; versus MAX34451ETL+, it trades raw ADC bits for embedded fault-response intelligence and thermal telemetry - making it better suited for unattended infrastructure deployments.
Availability
LM5056APMHE/NOPB is available at Aetrix Electronics and suitable for server backplane systems, base station power distribution, industrial telemetry applications, and high-reliability telecom equipment requiring stable component supply and long-term lifecycle support.
Supply support for LM5056APMHE/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in power management and industrial-grade IC design.
The LM5056APMHE/NOPB belongs to TI's high-voltage PMBus telemetry product line, engineered specifically for intelligent power monitoring in 48-V infrastructure systems where accuracy, fault autonomy, and standards compliance are mission-critical.
FAQ
What is the primary function of the LM5056APMHE/NOPB in a power system?
The LM5056APMHE/NOPB functions as a high-voltage telemetry and fault-management IC that continuously monitors input voltage, current, power, output voltage, auxiliary voltage, and temperature - converting analog measurements into digital PMBus-accessible data. Its core purpose is to provide real-time, calibrated insight into power rail health for system-level management and autonomous fault response in infrastructure applications.
How does the LM5056APMHE/NOPB achieve ±1.75% input power accuracy?
The LM5056APMHE/NOPB achieves ±1.75% input power accuracy through simultaneous sampling of VIN and IIN using its internal 12-bit ADC, eliminating time-skew errors inherent in sequential sampling. This synchronized acquisition, combined with factory-trimmed gain/offset calibration and simultaneous 1-kHz conversion, ensures the product VIN × IIN reflects true instantaneous power within the specified tolerance across –40°C to +125°C.
Can the LM5056APMHE/NOPB operate without an external VDD supply?
No, the LM5056APMHE/NOPB requires an external 5.0 V ±10% supply on the VDD pin to power its digital circuitry, SMBus interface, and internal logic. It does not generate its own VDD from VIN. The VDDPOR threshold is 3.8 V; operation below this level disables telemetry functionality and prevents proper SMBus communication - making a stable, bypassed 5-V rail mandatory for full functionality of the LM5056APMHE/NOPB.
What is the role of the CL pin on the LM5056APMHE/NOPB?
The CL pin on the LM5056APMHE/NOPB selects the full-scale range of the current sense amplifier: connecting CL to DGND sets 54.4 mV FSR, while connecting to VDD sets 27.0 mV FSR. This hardware-selectable range determines the maximum measurable current for a given sense resistor value and must be configured before power-up to ensure correct scaling of IIN readings throughout operation of the LM5056APMHE/NOPB.
Does the LM5056APMHE/NOPB support remote temperature sensing, and how is it implemented?
Yes, the LM5056APMHE/NOPB supports remote temperature sensing via its DIODE pin, which sources a 9.4 µA DC current plus periodic 250 µA pulses to drive an external MMBT3904 NPN transistor configured as a diode. The resulting forward voltage change is digitized by the internal ADC to compute temperature with ±2°C accuracy. Layout best practices - including low-parasitic routing and 1-nF local bypass - are required to maintain this accuracy in the LM5056APMHE/NOPB implementation.
LM5056APMHE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Base Station-Networking Line Cards, Servers
- Current - Supply:
- 6.8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-HTSSOP
LM5056APMHE/NOPB FAQ
1.How can I place an order for LM5056APMHE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5056APMHE/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM5056APMHE/NOPB reliable?
The price and inventory of LM5056APMHE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5056APMHE/NOPB is usually 5 days.
3.What payment methods are accepted for LM5056APMHE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5056APMHE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5056APMHE/NOPB?
LM5056APMHE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5056APMHE/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM5056APMHE/NOPB?
For technical support, including LM5056APMHE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5056APMHE/NOPB requirements.
6.How does Aetrix verify that LM5056APMHE/NOPB is sourced from the original manufacturer or authorized distributors?
All LM5056APMHE/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM5056APMHE/NOPB meets industry standards.
7.What is the process for return or replacement of LM5056APMHE/NOPB?
All LM5056APMHE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM5056APMHE/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM5056APMHE/NOPB part is unused and in its original packaging.
Return procedure for LM5056APMHE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM5056APMHE/NOPB Tags
-
TPS2511DGNR
Texas Instruments
-
UTC2000/MG
Microchip Technology
-
TUSB320HAIRWBR
Texas Instruments
-
TPS61252DSGR
Texas Instruments
-
PI5USB30216CXUAEX
Diodes Incorporated
-
SN6501DBVR
Texas Instruments
-
CYPD3177-24LQXQT
Infineon Technologies
-
SN6501QDBVRQ1
Texas Instruments
-
STUSB1600AQTR
STMicroelectronics
-
SN6505BDBVR
Texas Instruments
-
SN6501DBVT
Texas Instruments
-
TPS65150PWPR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
