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Analog Devices Inc. LTC3880EUJ-1#PBF
- Part No.:
- LTC3880EUJ-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC3880EUJ-1#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,117
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Product details
Overview
LTC3880EUJ-1#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 of VIN, IIN, VOUT, IOUT, and temperature for high-reliability server and telecom power rails.
For engineers reviewing the LTC3880EUJ-1#PBF datasheet, LTC3880EUJ-1#PBF pinout, LTC3880EUJ-1#PBF application, or LTC3880EUJ-1#PBF equivalent, this device serves as a digitally programmable, AEC-Q100 qualified dual-phase controller for intelligent power regulation in distributed systems requiring sequencing, margining, fault logging, and real-time telemetry.
Technical Context
The LTC3880EUJ-1#PBF implements analog current-mode control with constant-frequency PWM, enabling stable multi-phase operation up to six phases via SHARE_CLK synchronization. Its internal 16-bit ADC digitizes voltage, current, and temperature with 90ms round-robin conversion latency and ±1% total unadjusted error on IOUT readback.
Digital configuration is handled through a PMBus-compliant interface supporting full parameter programming-including soft-start, OV/UV thresholds, current limits, and frequency (250kHz–1MHz)-with EEPROM storage including ECC and fault logging. Unlike the LTC3880, the LTC3880-1 variant uses an external 5V supply for EXTVCC instead of an internal INTVCC regulator, reducing quiescent power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 24V - supports wide-input industrial and telecom supplies without external biasing |
| VOUT Range | 0.5V to 5.4V (4V on VOUT0) - covers core logic, memory, and I/O rail requirements |
| Output Accuracy | ±0.5% over temperature - ensures tight regulation under thermal stress without recalibration |
| ADC Resolution | 16-bit for VOUT, 10-bit for IOUT/VIN/T - enables high-fidelity telemetry for closed-loop monitoring |
| Switching Frequency | 250kHz to 1MHz - adjustable via resistor or PMBus for EMI optimization and efficiency trade-offs |
| Package | 40-pin (6mm × 6mm) QFN - thermally enhanced layout with exposed SGND pad for PCB heat sinking |
| Junction Temp | –40°C to 105°C - rated for extended industrial environments and automotive under-hood proximity |
Pinout & Package
40-pin (6mm × 6mm) plastic QFN package with exposed SGND pad (Pin 41), requiring soldering to PCB for thermal and electrical integrity. Pin functions are validated per Analog Devices' Rev. H datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply | Accepts 4.5V–24V; powers gate drivers and internal circuitry |
| TG0/TG1 | Top-side N-MOSFET gate drivers | High-current, fast-switching outputs (30ns tr/tf) for synchronous buck high-side switches |
| BG0/BG1 | Bottom-side N-MOSFET gate drivers | Complementary low-side drive with 30ns transition times and dead-time control |
| VSENSE0+/VSENSE0− | Differential output voltage sense (Channel 0) | Enables Kelvin sensing for ±0.5% accuracy; 41kΩ input resistance minimizes loading |
| ISENSE0+/ISENSE0− | Differential current sense (Channel 0) | Supports DCR or shunt-based sensing; 10-bit resolution with ±1% TUE at >6mV differential |
| SCL/SDA | PMBus/I²C serial interface | 400kHz compliant; open-drain with 0.4V VOL @ 3mA for robust bus communication |
| ALERT | Open-drain fault indicator | Asserts low on OV, UV, OC, OT, or bus timeout; configurable via PMBus command |
| SHARE_CLK | Phase synchronization clock output | Drives up to 6-phase PolyPhase® operation with programmable phase offsets (0°–300°) |
| WP | Write-protect enable | Hardware lock for EEPROM writes; prevents accidental configuration changes in field operation |
| TSNS0/TSNS1 | External temperature sensor inputs | Accepts diode-connected transistors; ±3°C accuracy over –40°C to 125°C range |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent output control | Each channel fully programmable for voltage, current limit, soft-start, and sequencing-enabling asymmetric rail generation (e.g., 3.3V/1.8V) |
| Integrated EEPROM with ECC | 10,000 write cycles / 10-year data retention; stores configuration, fault logs, and calibration data without external memory |
| Real-time telemetry readback | Simultaneous measurement of VIN, IIN, VOUT, IOUT, internal/external temperature-critical for predictive maintenance and dynamic load management |
| Accurate PolyPhase® current sharing | Active phase balancing across up to 6 controllers using SHARE_CLK; eliminates need for external current-sharing ICs |
| AEC-Q100 qualification | Rated for automotive applications (Grade E, –40°C to 105°C); includes enhanced ESD protection and fault response timing compliance |
Applications
| Server VR13/VR14 Power Delivery | Telecom Line Card Power |
|---|---|
Use Scenario: Dual-rail CPU/GPU core and I/O power delivery in 1U rack servers with dynamic load steps up to 50A/µs. IC Role / Device Role / Timing Role: Primary digital controller managing VDD_CORE (1.8V) and VDD_IO (3.3V) with synchronized soft-start and voltage margining. Use Value: ±0.5% output accuracy and 90ms telemetry update ensure stable operation during AVS and DVFS transitions without manual trimming. |
Use Scenario: Distributed 48V-to-12V/5V conversion on carrier-grade line cards with hot-swap and redundancy requirements. IC Role / Device Role / Timing Role: Master controller coordinating up to six parallel phases via SHARE_CLK for 120A+ output with automatic load balancing. Use Value: Fault logging and PMBus-triggered shutdown prevent cascading failures during overtemperature or overcurrent events. |
| Automotive ADAS Domain Controller | Industrial PLC Power Management |
Use Scenario: Powering vision processors and radar SoCs in autonomous driving ECUs where EMI and thermal performance are critical. IC Role / Device Role / Timing Role: Dual-channel controller delivering 1.0V@15A and 1.8V@10A with programmable frequency synchronization to avoid band interference. Use Value: AEC-Q100 qualification and internal temperature sensing eliminate need for external thermal monitors in compact enclosures. |
Use Scenario: Programmable 24V-to-5V/3.3V conversion in modular PLC backplanes with remote diagnostics and firmware-updatable margins. IC Role / Device Role / Timing Role: Digitally managed controller interfacing with host MCU via PMBus to support adaptive voltage scaling based on I/O module count. Use Value: EEPROM-stored configurations allow field updates without hardware change; GPIO0/1 provide status signaling to safety logic. |
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 | Single-output architecture; faster 35ms startup vs. 120ms; no internal EEPROM; supports Fast ADC mode for telemetry | Better suited for space-constrained single-rail designs needing rapid power-up; lacks dual-channel flexibility and nonvolatile storage | Select when only one regulated rail is required and startup time is critical; not a drop-in replacement due to pinout and feature set differences |
| MP2960AGQSE-LF-Z | Monolithic dual-output controller (integrated MOSFETs); lower VIN min (2.7V); no PMBus-uses SMBus v2.0; 12-bit telemetry ADC | Targeted at cost-sensitive embedded systems; limited to ≤30A/channel; lacks EEPROM, fault logging, and PolyPhase® scalability | Choose for simplified BOM and board area savings in non-automotive industrial applications where digital configurability is secondary to integration |
Compared with LTC3880EUJ-1#PBF, LTC3887IUJ#PBF trades dual-channel capability and EEPROM persistence for faster startup and reduced external component count, while MP2960AGQSE-LF-Z sacrifices configurability and scalability for monolithic simplicity and lower system cost.
Availability
LTC3880EUJ-1#PBF is available at Aetrix Electronics and suitable for server VR13/VR14 power delivery, telecom line card power, and automotive ADAS domain controller applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LTC3880EUJ-1#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and power management markets since 1965.
The LTC3880/LTC3880-1 product line was designed specifically for digitally managed, high-efficiency multi-phase DC/DC conversion in mission-critical infrastructure-emphasizing telemetry fidelity, fault resilience, and automotive-grade reliability.
FAQ
What is the key functional difference between LTC3880EUJ-1#PBF and LTC3880EUJ#PBF?
The LTC3880EUJ-1#PBF uses an external 5V supply for EXTVCC instead of the internal INTVCC regulator found in the LTC3880EUJ#PBF. This reduces quiescent power loss and improves efficiency in high-input-voltage applications, but requires provision of a clean 5V rail. Both share identical pinout, PMBus functionality, and dual-output control architecture.
Does LTC3880EUJ-1#PBF support true dual independent output sequencing?
Yes, LTC3880EUJ-1#PBF supports fully independent voltage ramp-up/down timing, delay, and margining per channel via PMBus commands or EEPROM-stored profiles. Sequencing can be voltage-based or event-triggered (e.g., RUN0/RUN1 assertion), with programmable delays from 0ms to 100s and resolution down to 1ms.
Can LTC3880EUJ-1#PBF operate in single-phase mode, and how is phase count configured?
Yes, LTC3880EUJ-1#PBF operates natively in dual-phase mode (one per channel) but supports up to six phases via PolyPhase® synchronization using the SHARE_CLK pin. Phase count is configured by connecting multiple LTC3880EUJ-1#PBF devices in master-slave topology; no external phase controller is needed.
What telemetry parameters does LTC3880EUJ-1#PBF measure with guaranteed accuracy?
LTC3880EUJ-1#PBF guarantees ±0.5% total unadjusted error for VOUT readback, ±1% for IOUT (at >6mV differential), ±0.5% for VIN, and ±3°C for external temperature (TSNS0/TSNS1). Internal temperature accuracy is ±1°C. All values are specified over –40°C to 105°C junction temperature range.
Is LTC3880EUJ-1#PBF pin-compatible with earlier revisions or alternate variants like LTC3880IUJ-1#PBF?
Yes, LTC3880EUJ-1#PBF is pin-compatible with all UJ-1 package variants (e.g., LTC3880IUJ-1#PBF), differing only in operating temperature grade (–40°C to 105°C vs. –40°C to 125°C) and screening. The pinout, footprint, and electrical characteristics are identical across all UJ-1 suffix parts.
LTC3880EUJ-1#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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
LTC3880EUJ-1#PBF FAQ
1.How can I place an order for LTC3880EUJ-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3880EUJ-1#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 LTC3880EUJ-1#PBF reliable?
The price and inventory of LTC3880EUJ-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3880EUJ-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3880EUJ-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3880EUJ-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3880EUJ-1#PBF?
LTC3880EUJ-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3880EUJ-1#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 LTC3880EUJ-1#PBF?
For technical support, including LTC3880EUJ-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3880EUJ-1#PBF requirements.
6.How does Aetrix verify that LTC3880EUJ-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3880EUJ-1#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 LTC3880EUJ-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3880EUJ-1#PBF?
All LTC3880EUJ-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3880EUJ-1#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 LTC3880EUJ-1#PBF part is unused and in its original packaging.
Return procedure for LTC3880EUJ-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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