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Analog Devices Inc. LTC3880IUJ#PBF
- Part No.:
- LTC3880IUJ#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC3880IUJ#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:345
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Product details
Overview
LTC3880IUJ#PBF from Analog Devices is a dual-output, PolyPhase® synchronous step-down DC/DC controller with integrated PMBus/I²C digital power system management. It delivers ±0.5% output voltage accuracy over temperature, supports 4.5V–24V input and 0.5V–5.4V output ranges, and enables precise telemetry readback (VIN, IIN, VOUT, IOUT, temperature, faults) in high-current distributed power systems such as telecom and datacom server rails.
For engineers reviewing the LTC3880IUJ#PBF datasheet, LTC3880IUJ#PBF pinout, LTC3880IUJ#PBF application, or LTC3880IUJ#PBF equivalent, this device is selected for digitally managed, multi-phase, high-accuracy power delivery requiring EEPROM-based configuration storage, analog current-mode control, and AEC-Q100 qualified operation up to 125°C junction temperature.
Technical Context
The LTC3880IUJ#PBF implements a constant-frequency, analog current-mode control loop with independent per-channel error amplifiers (gm = 3 mmho), enabling stable regulation across wide load and line variations. Its dual-phase architecture supports accurate PolyPhase® current sharing for up to six total phases via SHARE_CLK synchronization.
Digital management is handled through a PMBus-compliant I²C interface operating at up to 400 kHz, with integrated 16-bit ADCs for telemetry, internal EEPROM with ECC and fault logging, and programmable soft-start, sequencing, margining, OV/UV protection, and frequency synchronization (250 kHz–1 MHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 24V - supports wide-input industrial and telecom supply rails without external regulators. |
| VOUT Range | 0.5V to 5.4V (4V on VOUT0) - covers core, I/O, and auxiliary voltages in modern processors and FPGAs. |
| Output Accuracy | ±0.5% over temperature - ensures tight regulation for sensitive loads without external calibration. |
| ADC Resolution | 16-bit for VOUT/IOUT, 10-bit for VIN/temperature - enables high-fidelity telemetry for real-time health monitoring. |
| Package | 40-pin (6mm × 6mm) QFN with exposed thermal pad - provides low thermal resistance (θJC = 2.5°C/W) for high-power density designs. |
| Junction Temp | –40°C to +125°C - rated for extended automotive and industrial environments per AEC-Q100. |
| Interface | PMBus v1.3 compliant I²C - allows interoperability with industry-standard digital power management tools like LTpowerPlay™. |
Pinout & Package
Package: 40-lead (6mm × 6mm) plastic QFN with exposed SGND pad (Pin 41), optimized for thermal performance and compact layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply rail | Accepts 4.5V–24V; powers internal regulators and gate drivers. |
| TG0/TG1 | Top-side N-MOSFET gate drivers | High-current (1A peak) drivers with 30ns rise/fall time for efficient switching. |
| BG0/BG1 | Bottom-side N-MOSFET gate drivers | Complementary drivers with 30ns timing; supports synchronous rectification. |
| VSENSE0+/VSENSE0– | Differential output voltage sense inputs (Channel 0) | Enables Kelvin sensing for ±0.5% accuracy; 41kΩ input resistance minimizes loading. |
| ISENSE0+/ISENSE0– | Differential current sense inputs (Channel 0) | Supports DCR or resistor-based sensing; 10-bit resolution with ±1% TUE. |
| SCL/SDA | PMBus I²C serial interface | 400 kHz max clock; open-drain with 3mA sink capability and 10pF input capacitance. |
| ALERT | Open-drain fault indicator | Asserts low on any monitored fault (OV, UV, OT, OC); configurable via PMBus. |
| SHARE_CLK | Phase synchronization output | Drives external controllers for precise PolyPhase® current sharing across up to 6 phases. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent analog current-mode loops | Each channel has dedicated gm amplifier (3 mmho) and ITH pins-enables fast transient response and stable multi-load regulation. |
| Integrated EEPROM with ECC and fault logging | 10,000 write cycles / 10-year retention; stores configuration, calibration, and fault history without external memory. |
| Programmable digital power management | Full PMBus command set (voltage, current limit, soft-start, sequencing, margining, OV/UV thresholds) stored in nonvolatile memory. |
| AEC-Q100 qualified operation | Rated for –40°C to +125°C junction temperature-validated for automotive infotainment and ADAS power subsystems. |
| Accurate PolyPhase® current sharing | SHARE_CLK output enables <±3% phase current mismatch across up to 6 synchronized controllers in high-current applications. |
Applications
| Telecom Server Core Rails | Datacenter GPU Power Delivery |
|---|---|
Use Scenario: Regulating 1.8V/15A and 3.3V/15A rails for ASICs and network processors in 1RU servers. IC Role / Device Role / Timing Role: Dual-output PolyPhase® controller managing two independent buck stages with synchronized switching and current balancing. Use Value: ±0.5% voltage accuracy and real-time telemetry ensure compliance with PCIe and OCP power specifications under dynamic load transients. | Use Scenario: Delivering tightly regulated 0.8V/60A+ power to AI accelerators using multi-phase parallelization. IC Role / Device Role / Timing Role: Master controller coordinating up to six phases via SHARE_CLK; each phase driven by identical LTC3880-based sub-controllers. Use Value: Accurate current sharing (<±3%) and digital margining enable safe validation of GPU voltage tolerance limits during production test. |
| Automotive ADAS Domain Controller | Industrial PLC Power Management |
Use Scenario: Powering radar SoCs and vision processors in AEC-Q100-compliant domain ECUs. IC Role / Device Role / Timing Role: Dual-channel controller with internal 5V regulator (INTVCC), temperature monitoring, and fault logging for functional safety support. Use Value: Built-in overtemperature, overvoltage, and undervoltage fault responses meet ASIL-B diagnostic coverage requirements without external supervision. | Use Scenario: Managing isolated 5V and 3.3V rails in programmable logic controllers with remote monitoring via industrial Ethernet. IC Role / Device Role / Timing Role: Digitally configurable controller interfacing with host MCU via PMBus; stores custom startup sequences in EEPROM. Use Value: Programmable soft-start, sequencing, and telemetry reduce firmware development effort and enable predictive maintenance via logged fault history. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3887IUJ#PBF | Higher integration: includes internal LDOs for VDD33/VDD25; faster ADC (35ms vs 120ms start-up); supports only 4V max VOUT0. | Better suited for space-constrained designs needing faster telemetry response and reduced external biasing components. | Select LTC3887IUJ#PBF when faster system boot time and lower BOM count outweigh the need for 5.4V VOUT0 capability. |
| TPS546D24RTQR | PMBus-compliant dual-output controller with integrated MOSFET drivers; 4.5V–18V VIN; 0.5V–5.5V VOUT; no internal EEPROM or fault logging. | Targeted at cost-sensitive industrial applications where configuration persistence and long-term fault history are not required. | Choose TPS546D24RTQR for high-volume, non-safety-critical systems where TI's Fusion Digital Power Designer toolchain is preferred. |
Compared with LTC3887IUJ#PBF and TPS546D24RTQR, the LTC3880IUJ#PBF uniquely combines AEC-Q100 qualification, 5.4V VOUT0 support, and full EEPROM-based fault logging-making it optimal for automotive and high-reliability industrial deployments requiring traceable power health data.
Availability
LTC3880IUJ#PBF is available at Aetrix Electronics and suitable for telecom server core rails, automotive ADAS domain controllers, and industrial PLC power management requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LTC3880IUJ#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.
The LTC3880IUJ#PBF belongs to the LTC® digital power controller family, designed specifically for high-accuracy, multi-phase, digitally managed DC/DC conversion in mission-critical infrastructure and automotive systems.
FAQ
What is the maximum output voltage supported by the LTC3880IUJ#PBF?
The LTC3880IUJ#PBF supports a maximum output voltage of 5.4V on Channel 1 (VOUT1) and 4.0V on Channel 0 (VOUT0), as specified in the Electrical Characteristics table under VOUT1R0 and VOUT0R0 parameters. This is confirmed by the datasheet Rev. H, Table "ELECTRICAL CHARACTERISTICS" on page 5, where VOUT1R0 MAX = 5.6V (typical 5.4V) and VOUT0R0 MAX = 4.2V (typical 4.0V). The LTC3880IUJ#PBF does not support 5.5V on VOUT0.
Does the LTC3880IUJ#PBF include an internal 5V regulator?
Yes, the LTC3880IUJ#PBF integrates an internal 5V linear regulator (INTVCC) that supplies internal circuitry and gate drivers. Per the datasheet Rev. H, page 8, VINTVCC is specified at 4.8V to 5.2V with ±2% load regulation. This distinguishes it from the LTC3880-1 variant, which requires an external 5V supply. The LTC3880IUJ#PBF uses the internal regulator exclusively and does not support EXTVCC operation.
How many phases can the LTC3880IUJ#PBF synchronize in a PolyPhase® configuration?
The LTC3880IUJ#PBF supports accurate PolyPhase® current sharing for up to six total phases. As stated in the "Features" section of the datasheet Rev. H, page 1, it includes "Accurate PolyPhase® Current Sharing for Up to 6 Phases", and the SHARE_CLK pin provides a synchronized clock output to coordinate external controllers. Each LTC3880IUJ#PBF manages two phases directly; additional phases are added by cascading compatible controllers (e.g., LTC3874, LTC3876) using the SHARE_CLK signal.
Is the LTC3880IUJ#PBF qualified for automotive applications?
Yes, the LTC3880IUJ#PBF is AEC-Q100 qualified for automotive applications. The datasheet Rev. H, page 1, explicitly lists "AEC-Q100 Qualified for Automotive Applications" under Features. Its –40°C to +125°C junction temperature rating (confirmed in Order Information table, page 4) and built-in fault logging, temperature monitoring, and robust PMBus communication make it suitable for ADAS domain controllers and infotainment systems requiring automotive-grade reliability.
What telemetry parameters can be read back via PMBus on the LTC3880IUJ#PBF?
The LTC3880IUJ#PBF supports PMBus-readback of VIN, IIN, VOUT (per channel), IOUT (per channel), internal die temperature, and external temperature (via TSNS0/TSNS1 pins), along with comprehensive fault status (OV, UV, OT, OC, etc.). As documented in the "Features" section (page 1) and "Telemetry Read Back" bullet, all values are digitized by integrated 16-bit ADCs and accessible via standard PMBus commands (e.g., READ_VIN, READ_VOUT, READ_TEMPERATURE_1). The LTC3880IUJ#PBF also logs fault events persistently in its internal EEPROM.
LTC3880IUJ#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 24V
- Frequency - Switching:
- -
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- I2C, PMBus
- Control Features:
- Enable, Frequency Control
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
LTC3880IUJ#PBF FAQ
1.How can I place an order for LTC3880IUJ#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3880IUJ#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 LTC3880IUJ#PBF reliable?
The price and inventory of LTC3880IUJ#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3880IUJ#PBF is usually 5 days.
3.What payment methods are accepted for LTC3880IUJ#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3880IUJ#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3880IUJ#PBF?
LTC3880IUJ#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3880IUJ#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 LTC3880IUJ#PBF?
For technical support, including LTC3880IUJ#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3880IUJ#PBF requirements.
6.How does Aetrix verify that LTC3880IUJ#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3880IUJ#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 LTC3880IUJ#PBF meets industry standards.
7.What is the process for return or replacement of LTC3880IUJ#PBF?
All LTC3880IUJ#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3880IUJ#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 LTC3880IUJ#PBF part is unused and in its original packaging.
Return procedure for LTC3880IUJ#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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