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Analog Devices Inc. LTC3880EUJ#PBF
- Part No.:
- LTC3880EUJ#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC3880EUJ#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,857
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Product details
Overview
LTC3880EUJ#PBF from Analog Devices is a dual-output, PolyPhase® synchronous step-down DC/DC controller with digital power system management via PMBus/I²C interface. It delivers ±0.5% output voltage accuracy over temperature, supports 4.5V–24V input and 0.5V–5.4V output ranges, and integrates 16-bit ADC telemetry for VIN, IIN, VOUT, IOUT, and temperature - enabling real-time monitoring in high-current telecom and datacom power systems.
For engineers reviewing the LTC3880EUJ#PBF datasheet, LTC3880EUJ#PBF pinout, LTC3880EUJ#PBF application, or LTC3880EUJ#PBF equivalent, this controller provides programmable voltage/current limits, digital soft-start/stop, sequencing, margining, OV/UV protection, and frequency synchronization (250kHz–1MHz), all stored in internal EEPROM with ECC for robust field reconfiguration and fault logging.
Technical Context
The LTC3880EUJ#PBF implements an analog current-mode control loop with constant-frequency operation, supporting up to six-phase PolyPhase® current sharing across dual outputs. Its integrated N-channel MOSFET gate drivers deliver 30ns rise/fall times and precise dead-time control (30ns TG/BG and BG/TG delays) for high-efficiency synchronous rectification.
Digital management is implemented via a PMBus-compliant I²C interface with full command support (READ_VIN, READ_VOUT, READ_IOUT, READ_TEMPERATURE, STORE_USER_ALL), 10kHz–400kHz bus timing, and hardware write-protect (WP) pin. Internal 5V INTVCC regulator eliminates need for external bias supply - distinguishing it from the LTC3880-1 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 24V - supports wide-input industrial and telecom rails without external pre-regulation |
| VOUT Range | 0.5V to 5.4V (4V on VOUT0) - covers core logic, memory, and I/O supply requirements | Output Voltage Accuracy | ±0.5% over temperature - enables tight regulation for sensitive ASIC/FPGA loads without external calibration |
| ADC Resolution | 16-bit for VOUT/IOUT/temperature telemetry - provides sub-mV and sub-mA readback resolution for closed-loop validation |
| Switching Frequency | 250kHz to 1MHz (synchronizable) - allows optimization of size vs. efficiency and EMI compliance |
| Package | 40-pin (6mm × 6mm) QFN with exposed thermal pad - supports >100W per phase with low θJC = 2.5°C/W |
| EEPROM | Internal EEPROM with ECC and 10-year retention - stores configuration, fault logs, and user settings for unattended reboots |
Pinout & Package
40-pin (6mm × 6mm) plastic QFN package with exposed SGND pad (Pin 41) requiring PCB soldering for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input power rail | Accepts 4.5V–24V; powers INTVCC regulator and gate drivers |
| TG0/TG1 | Top-gate drive outputs | Drive external high-side N-MOSFETs with 30ns transition times and 90ns minimum on-time |
| BG0/BG1 | Bottom-gate drive outputs | Drive external low-side N-MOSFETs with matched timing and dead-time control |
| VSENSE0+/VSENSE0− VSENSE1+/VSENSE1− | Differential output voltage sense inputs | Enable Kelvin sensing for ±0.5% accuracy; reject PCB trace IR drop |
| ISENSE0+/ISENSE0− ISENSE1+/ISENSE1− | Differential current sense inputs | Support DCR or resistor-based sensing; 10-bit resolution with auto-ranging gain |
| SDA/SCL | PMBus/I²C bidirectional interface | Supports 400kHz operation; open-drain with 3mA sink capability and 0.4V VOL |
| ALERT | Open-drain fault indicator | Asserts low on OV, UV, OC, OT, or communication timeout; configurable via PMBus |
| SHARE_CLK | Phase synchronization clock output | Enables accurate current sharing across up to six phases when cascading multiple controllers |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent output control | Each channel fully programmable for voltage, current limit, soft-start, sequencing, and margining - no shared registers or cross-talk |
| Digital telemetry with 16-bit ADC | Simultaneous readback of VIN, IIN, VOUT, IOUT, internal/external temperature - enables real-time health monitoring and predictive maintenance |
| EEPROM with ECC and fault logging | Stores configuration, calibration data, and timestamped fault records - survives power loss and supports field firmware updates |
| Analog current-mode control loop | Provides inherent cycle-by-cycle current limiting and stable transient response without digital compensation tuning |
| AEC-Q100 qualified (E-grade) | Rated for –40°C to 105°C junction temperature - validated for automotive infotainment and ADAS power subsystems |
Applications
| Telecom Base Station Power | Data Center Server VRM |
|---|---|
Use Scenario: Dual-rail power delivery to FPGA, DSP, and memory subsystems in 5G remote radio units with dynamic load changes. IC Role / Device Role / Timing Role: Primary dual-phase controller managing 1.8V/15A and 3.3V/20A outputs with synchronized switching and current sharing. Use Value: ±0.5% voltage accuracy and real-time telemetry enable compliance with strict 5G baseband IC power specs and reduce validation time. | Use Scenario: High-density, digitally managed VRMs supplying CPU/GPU cores and I/O rails in rack-mounted servers. IC Role / Device Role / Timing Role: Digital power controller implementing PMBus-based sequencing, margining, and fault reporting per Intel VR13/VR14 standards. Use Value: EEPROM-stored configurations allow identical board designs across SKUs; telemetry supports dynamic power capping and thermal throttling. |
| Industrial PLC Power Module | Automotive ADAS Domain Controller |
Use Scenario: Robust, field-upgradable power for programmable logic controllers operating in harsh factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Dual-output controller with watchdog-enabled fault response, undervoltage lockout, and programmable startup delay for safe cold-boot sequencing. Use Value: AEC-Q100 qualification and 10-year EEPROM retention ensure long-term reliability; ALERT pin integration simplifies safety-critical fault signaling. | Use Scenario: Power management for multi-sensor fusion domain controllers requiring isolated, sequenced, and monitored 1.2V, 1.8V, and 3.3V rails. IC Role / Device Role / Timing Role: Digital controller implementing ISO 26262-compliant power-on self-test, voltage margining, and fault logging for ASIL-B subsystems. Use Value: Internal temperature sensors and PMBus telemetry provide traceable thermal history for functional safety audits; EEPROM stores calibrated thresholds. |
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 | Faster ADC (5.5V/5.5V max VOUT, 35ms startup), no internal 5V regulator - requires external EXTVCC | Better suited for ultra-fast power-up sequences; lacks integrated INTVCC, increasing BOM count | Select LTC3887 when startup time <50ms is critical and external 5V bias is available |
| TPS53689RTAT | Texas Instruments part with PMBus 1.3, 32-bit telemetry, but only 12-bit ADC and no EEPROM fault logging | Lower-cost alternative for non-critical telemetry; lacks ECC-protected NVM and AEC-Q100 grade | Choose TPS53689 for cost-sensitive server applications where EEPROM persistence is not required |
Compared with LTC3887IUJ#PBF and TPS53689RTAT, the LTC3880EUJ#PBF uniquely combines integrated INTVCC, ±0.5% accuracy, EEPROM fault logging, and AEC-Q100 qualification - making it optimal for automotive and industrial systems requiring field-reprogrammability and long-term data integrity.
Availability
LTC3880EUJ#PBF is available at Aetrix Electronics and suitable for telecom infrastructure, datacenter server VRMs, and automotive ADAS power modules requiring stable component supply, long-lifecycle support, and digital power system management capabilities.
Supply support for LTC3880EUJ#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 LTC3880EUJ#PBF belongs to the Power by Linear™ digital power controller family, designed specifically for intelligent, telemetry-enabled, high-current DC/DC conversion in mission-critical infrastructure and automotive applications.
FAQ
What is the maximum supported switching frequency for LTC3880EUJ#PBF?
The LTC3880EUJ#PBF supports programmable switching frequencies from 250kHz to 1MHz, synchronized via the SYNC pin. Frequency selection is set using external resistors on FREQ_CFG or configured digitally via PMBus command MFR_PWM_CONFIG_LTC3880. The controller maintains stable current-mode operation across this range with consistent phase relationships between channels.
Does LTC3880EUJ#PBF include an internal voltage regulator?
Yes, the LTC3880EUJ#PBF integrates a 5V linear regulator (INTVCC) that powers internal circuitry and gate drivers. This distinguishes it from the LTC3880-1 variant, which requires an external 5V supply. INTVCC operates from VIN (4.5V–24V) and delivers up to 100mA with ±2% load regulation, eliminating the need for an auxiliary bias rail.
How does LTC3880EUJ#PBF handle fault conditions like overvoltage or overtemperature?
The LTC3880EUJ#PBF detects OV, UV, OC, and OT faults via dedicated comparators and reports them through the ALERT pin and PMBus STATUS_WORD register. Responses include immediate shutdown, latched or retry behavior (configurable), and timestamped entries in internal EEPROM fault log. For example, VOUT overvoltage triggers a 35µs GPIO response and stores fault type, time, and measured voltage.
Can LTC3880EUJ#PBF be used in six-phase PolyPhase® configurations?
Yes, the LTC3880EUJ#PBF supports up to six-phase operation via its SHARE_CLK pin and phase-locked loop. When cascaded with additional LTC3880 or LTC3887 controllers, it enables accurate current sharing across all phases using external current-sense resistors or DCR sensing - verified in typical applications with ≤3% phase current imbalance at full load.
What telemetry parameters can be read back from LTC3880EUJ#PBF via PMBus?
The LTC3880EUJ#PBF supports real-time PMBus readback of VIN, IIN, VOUT0/VOUT1, IOUT0/IOUT1, internal die temperature (T2), and two external temperatures (T0/T1 via TSNS0/TSNS1 pins). All values are acquired by the integrated 16-bit ADC and reported with calibrated accuracy - e.g., VOUT readback has 244µV LSB resolution and ±0.5% TUE.
LTC3880EUJ#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#PBF FAQ
1.How can I place an order for LTC3880EUJ#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3880EUJ#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#PBF reliable?
The price and inventory of LTC3880EUJ#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#PBF is usually 5 days.
3.What payment methods are accepted for LTC3880EUJ#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3880EUJ#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3880EUJ#PBF?
LTC3880EUJ#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3880EUJ#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#PBF?
For technical support, including LTC3880EUJ#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3880EUJ#PBF requirements.
6.How does Aetrix verify that LTC3880EUJ#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3880EUJ#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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3880EUJ#PBF?
All LTC3880EUJ#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3880EUJ#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#PBF part is unused and in its original packaging.
Return procedure for LTC3880EUJ#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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