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Analog Devices Inc. LTC2971IY#PBF
- Part No.:
- LTC2971IY#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 49-LBGA
- Datasheet:
-
LTC2971IY#PBF.pdf
- Description:
- 2-CHANNEL HIGH VOLTAGE PMBUS POW
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
LTC2971IY#PBF from Analog Devices is a 2-channel ±60V Power System Manager IC that sequences, trims, margins, supervises, and logs faults for dual power rails. It integrates a 16-bit ADC for voltage/current/temperature telemetry, soft-connect DACs for disturbance-free servo control, and PMBus/I²C interface. It operates across –40°C to 105°C and supports autonomous fault management in high-reliability server and medical power systems.
For engineers reviewing the LTC2971IY#PBF datasheet, LTC2971IY#PBF pinout, LTC2971IY#PBF application, or LTC2971IY#PBF equivalent, key selection criteria include its ±60V channel flexibility (LTC2971 variant), 0.25% voltage trim accuracy, integrated energy accumulation, black-box fault logging, and 49-pin 7mm × 7mm BGA package with VPWR-powered operation from 4.5V–60V.
Technical Context
The LTC2971IY#PBF implements a dual-channel architecture with independent ADC monitoring paths for input/output voltages, currents, and temperatures - supporting both positive- and negative-rail configurations via variant-specific sense ranges. Its proprietary soft-connect DAC algorithm minimizes transient disturbances during margining and servo operations.
It features autonomous fault response logic with configurable retry, black-box EEPROM storage, and single-wire clock sharing across multiple ADI PSM devices. Supervision includes over/under-voltage and temperature thresholds per channel, plus watchdog timer support for microprocessor activity monitoring and reset initiation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VPWR) | 4.5V to 60V - enables direct powering from main rail without auxiliary supply |
| Operating Temp | –40°C to 105°C - qualified for industrial and extended-temperature embedded systems |
| Voltage Accuracy | ±0.25% of reading (10V–60V) - ensures precise closed-loop servo and margining control |
| ADC Resolution | 16-bit - delivers 4.5mV/LSB voltage resolution up to 60V full-scale |
| Interface | PMBus/SMBus/I²C compliant - enables standard system-level power management integration |
| Fault Logging | EEPROM with ECC - stores timestamped fault status and telemetry autonomously |
| Package | 49-pin 7mm × 7mm BGA - compact footprint suitable for dense server and medical PCB layouts |
Pinout & Package
49-pin 7mm × 7mm BGA package with bottom-side thermal pad; JEDEC MSL Level 3 rating; 125°C max junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VPWR | Main power supply input | Accepts 4.5V–60V; powers internal regulators and analog circuitry |
| VDD33 | 3.3V regulator output | Provides regulated 3.3V (3.13–3.47V) for digital core and I/O |
| VDDIO | I/O voltage reference | Configurable 1.62V–3.6V supply for SMBus/PMBus logic level setting |
| VIN_SNS | Input voltage sense input | Differential high-voltage monitor (–0.3V to 63V range) |
| VOUT_SNS0 / VOUT_SNS1 | Output voltage sense inputs | Supports ±60V range per channel (LTC2971 variant); referenced to GNDSNS[0:1] |
| IOUT_SNSP0/M0 / IOUT_SNSP1/M1 | Current sense differential inputs | ±80mV full-scale for shunt-based current measurement; supports DCR sensing mode |
| VDAC0 / VDAC1 | Soft-connect DAC outputs | 0–5.5V range; drive external DC/DC feedback nodes with minimal transient injection |
| TSENSE0 / TSENSE1 | External temperature sensor inputs | Accept diode-connected NPN/PNP or thermistor networks; 0.0476°C/LSB resolution |
| ALERTB / FAULTB0 / FAULTB1 | Open-drain fault indicator outputs | Active-low signals for system-level fault propagation and sequencing coordination |
| SHARE_CLK | Clock synchronization input | Enables deterministic timing alignment across multiple ADI PSM devices |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous fault logging | On-chip EEPROM with ECC stores fault status, telemetry, and timestamps without host intervention |
| Soft-connect DACs | Proprietary slew-rate controlled outputs minimize supply disturbance during margining/servo |
| Dual-channel high-voltage supervision | Independent over/under-voltage and temperature thresholds per channel with programmable responses |
| Energy accumulation | Real-time input energy (EIN) calculation with MFR_EIN command access via PMBus |
| Multi-device synchronization | Single-wire SHARE_CLK bus coordinates sequencing and fault response across ADI PSM ecosystem |
| Flexible power sourcing | Operates from VPWR (4.5V–60V) or external 3.3V supply - simplifies system power architecture |
Applications
| Server Power Sequencing | Medical Imaging PSU Control |
|---|---|
Use Scenario: Coordinating startup/shutdown order of CPU, GPU, and memory rails in dual-socket servers. IC Role / Device Role / Timing Role: Primary power system manager executing time-based and event-triggered sequencing with fault-aware retries. Use Value: Prevents latch-up and inrush damage by enforcing strict voltage ramp timing and inter-rail dependencies. |
Use Scenario: Monitoring and trimming ±15V analog supply rails feeding CT/MRI detector front-ends. IC Role / Device Role / Timing Role: Dual-channel supervisor with ±60V capability managing precision analog bias supplies and thermal derating. Use Value: Maintains <±0.25% output stability under load transients and ambient drift, critical for image SNR integrity. |
| Industrial Test Equipment | High-Reliability Avionics PSU |
Use Scenario: Real-time telemetry and fault capture during automated functional testing of programmable power modules. IC Role / Device Role / Timing Role: Telemetry hub logging input/output voltage, current, temperature, and energy consumption per test cycle. Use Value: Enables pass/fail correlation with parametric deviations using on-device black-box fault log with ECC protection. |
Use Scenario: Autonomous power health monitoring in airborne computing units where host processor may be unavailable. IC Role / Device Role / Timing Role: Standalone fault manager executing pre-programmed shutdown sequences upon overvoltage or overtemperature events. Use Value: Meets DO-254 safety requirements via deterministic response, EEPROM-stored configuration, and watchdog-initiated reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power system management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2972IY#PBF | 4-channel version with identical ±60V per-channel capability and same BGA package | Required when managing >2 power rails in single-package solution | Select LTC2972IY#PBF only if four independent monitored channels are needed; pinout and firmware are not compatible |
| LTC2974IY#PBF | 4-channel device with enhanced telemetry (dual 16-bit ADCs), higher PMBus speed, and expanded EEPROM | Suitable for complex multi-rail systems requiring concurrent high-speed sampling and deeper fault history | LTC2974IY#PBF offers greater telemetry bandwidth and storage but requires layout revision due to different pin assignment |
Compared with LTC2971IY#PBF, LTC2972IY#PBF adds two more managed channels in the same footprint but lacks extended EEPROM and telemetry depth; LTC2974IY#PBF provides superior data throughput and logging capacity at the cost of non-interchangeable pinout and higher BOM cost.
Availability
LTC2971IY#PBF is available at Aetrix Electronics and suitable for server power sequencing, medical imaging PSU control, industrial test equipment, and high-reliability avionics requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LTC2971IY#PBF 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
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for industrial, automotive, communications, and healthcare applications.
The LTC2971IY#PBF belongs to ADI's Power System Management (PSM) product line, designed specifically for autonomous, standards-compliant control and telemetry of complex multi-rail power architectures in mission-critical systems.
FAQ
What is the operating temperature range of the LTC2971IY#PBF?
The LTC2971IY#PBF is rated for operation from –40°C to +105°C, making it suitable for industrial and extended-temperature environments. This grade is confirmed in the Order Information table (Rev. A datasheet, page 5), where "IY" denotes the industrial temperature range, distinct from the commercial (CY) and high-reliability (HY) variants. The junction temperature limit remains 125°C.
Does the LTC2971IY#PBF support negative output voltage supervision?
Yes - the LTC2971IY#PBF (base variant) supports 0V to +60V on Channel 0 and 0V to +60V on Channel 1. However, negative rail supervision requires the LTC2971-1 or LTC2971-2 variants. The LTC2971IY#PBF itself does not monitor negative voltages; its VOUT_SNS0/VOUT_SNS1 inputs are specified for 0V–60V differential range per the Electrical Characteristics table (page 6).
Can the LTC2971IY#PBF operate without an external microcontroller?
Yes, the LTC2971IY#PBF supports fully autonomous operation using its internal configuration EEPROM with ECC. Sequencing, fault response, telemetry logging, and servo control execute independently after initial programming via PMBus. No host processor is required for runtime supervision - a key feature highlighted in the DESCRIPTION section (page 1) and OPERATION overview (page 21).
What is the voltage accuracy specification for the LTC2971IY#PBF ADC?
The LTC2971IY#PBF achieves ±0.25% of reading total unadjusted error (TUE) for voltage sense inputs between 10V and 60V, and ±25mV for inputs below 10V (Electrical Characteristics, page 7). This accuracy applies across the full –40°C to +105°C operating range and is critical for reliable closed-loop servo and margining functions.
How is the LTC2971IY#PBF powered, and what are the supply options?
The LTC2971IY#PBF can be powered either from VPWR (4.5V–60V) - which also supplies internal regulators - or directly from an external 3.3V source applied to VDD33. The datasheet explicitly states "LTC2971 MAY ALSO BE POWERED DIRECTLY FROM AN EXTERNAL 3.3V SUPPLY" in the Typical Application schematic (page 1), and VPWR specifications confirm 4.5V–60V operation (page 5).
LTC2971IY#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 49-LBGA
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- Computers, Servers
- Current - Supply:
- 6mA
- Voltage - Supply:
- 4.5V ~ 60V
- Operating Temperature:
- -40°C ~ 105°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 49-BGA (7x7)
LTC2971IY#PBF FAQ
1.How can I place an order for LTC2971IY#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2971IY#PBF 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 LTC2971IY#PBF reliable?
The price and inventory of LTC2971IY#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2971IY#PBF is usually 5 days.
3.What payment methods are accepted for LTC2971IY#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2971IY#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2971IY#PBF?
LTC2971IY#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2971IY#PBF 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 LTC2971IY#PBF?
For technical support, including LTC2971IY#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2971IY#PBF requirements.
6.How does Aetrix verify that LTC2971IY#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2971IY#PBF 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 LTC2971IY#PBF meets industry standards.
7.What is the process for return or replacement of LTC2971IY#PBF?
All LTC2971IY#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2971IY#PBF, 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 LTC2971IY#PBF part is unused and in its original packaging.
Return procedure for LTC2971IY#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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