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Analog Devices Inc. LTC3880EUJ-1#TRPBF
- Part No.:
- LTC3880EUJ-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC3880EUJ-1#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,710
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Product details
Overview
LTC3880EUJ-1#TRPBF 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 precise voltage regulation (±0.5% over temperature), supports 4.5V–24V input and 0.5V–5.4V output ranges, integrates 16-bit ADC telemetry, EEPROM with ECC, and gate drivers for up to 6-phase operation - used in high-current telecom and datacom power systems.
For engineers reviewing the LTC3880EUJ-1#TRPBF datasheet, LTC3880EUJ-1#TRPBF pinout, LTC3880EUJ-1#TRPBF application, or LTC3880EUJ-1#TRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed telemetry capabilities (VIN, VOUT, IOUT, temperature), real-world sequencing/margining behavior, and two rigorously cross-checked alternative controllers for digital POL applications.
Technical Context
The LTC3880EUJ-1#TRPBF implements analog current-mode control with constant-frequency PWM, enabling stable multi-phase current sharing across up to six phases using the SHARE_CLK signal. Its internal 16-bit ADC continuously monitors VIN, VOUT0/VOUT1, IOUT0/IOUT1, and internal/external temperatures with 90ms round-robin conversion latency.
Digital configuration and telemetry operate over a PMBus-compliant I²C interface (up to 400kHz), supporting full readback of operating parameters, fault logging with time-stamped records in internal EEPROM, and programmable soft-start, sequencing, OV/UV limits, and frequency synchronization (250kHz–1MHz). Unlike the LTC3880, the LTC3880-1 variant uses an external 5V supply for EXTVCC instead of an integrated INTVCC regulator.
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 (VOUT0 max 4V, VOUT1 max 5.4V) - covers core, I/O, and auxiliary voltages in modern SoCs/FPGAs |
| Output Accuracy | ±0.5% over temperature - enables tight margining and eliminates need for post-production trimming |
| ADC Resolution | 16-bit for VOUT/IOUT, 10-bit for VIN/temp - provides sub-mV and sub-mA telemetry resolution for closed-loop monitoring |
| EEPROM | Internal with ECC and 10-year retention - stores configuration, fault logs, and calibration data without external memory |
| PMBus Speed | Up to 400kHz - allows fast parameter updates and real-time telemetry polling in dense server power systems |
| Phase Support | Up to 6 phases with PolyPhase® current sharing - scales output current beyond 100A while maintaining thermal balance |
Pinout & Package
Package: 40-pin (6mm × 6mm) QFN with exposed thermal pad (Pin 41 = SGND), rated for –40°C to 105°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input power rail | Accepts 4.5V–24V; powers internal circuitry and gate drivers via EXTVCC path (LTC3880-1 requires external 5V) |
| TG0/TG1 | Top-side N-MOSFET gate drive outputs | High-current, low-propagation-delay drivers (30ns rise/fall) for synchronous buck high-side switches |
| BG0/BG1 | Bottom-side N-MOSFET gate drive outputs | Complementary low-side drivers with 30ns timing; supports dead-time control for efficiency optimization |
| VSENSE0+/VSENSE0– VSENSE1+/VSENSE1– | Differential output voltage sense inputs | Enable Kelvin sensing for ±0.5% accuracy; reject PCB trace IR drop in high-current designs |
| ISENSE0+/ISENSE0– ISENSE1+/ISENSE1– | Differential current sense inputs | Support DCR or resistor-based sensing; 10-bit resolution for IOUT telemetry with ±1% TUE |
| TSNS0/TSNS1 | External temperature sensor inputs | Interface with NTC/PTC thermistors or diode-connected transistors; ±3°C accuracy over range |
| SHARE_CLK | Phase synchronization clock output | Drives clock to slave controllers for accurate interleaved phase alignment in multi-phase systems |
| SCL/SDA | PMBus I²C bidirectional bus lines | Open-drain, 400kHz-capable interface with built-in filtering; supports standard PMBus command set |
| ALERT | Open-drain fault indicator | Asserts low on OV, UV, OC, OT, or communication timeout - enables system-level fault prioritization |
| RUN0/RUN1 | Enable inputs for each channel | Logic-controlled startup sequencing; support hardware- or software-initiated ramp-up with programmable delays |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent output control | Each channel fully configurable for voltage, current limit, soft-start, and sequencing - eliminates need for discrete supervisors |
| Digital telemetry with 16-bit ADC | Real-time readback of VIN, VOUT0/1, IOUT0/1, internal/external temperature - enables predictive maintenance and dynamic load-line adjustment |
| EEPROM with ECC and fault logging | Stores configuration and timestamps critical faults (OV, UV, OC, OT) - supports root-cause analysis without host intervention |
| Programmable margining and sequencing | Voltage margining (±5%) and multi-step sequencing (on/off delay, ramp rate) - meets ASIC/FPGA power-up requirements per JEDEC JEP127 |
| PolyPhase® current sharing | Accurate interleaving across up to 6 phases using SHARE_CLK - reduces input/output ripple and improves thermal distribution |
Applications
| Telecom Line Cards | Data Center Server VRMs |
|---|---|
Use Scenario: Powering FPGA, ASIC, and SerDes on carrier-grade line cards requiring strict voltage sequencing and telemetry. IC Role / Device Role / Timing Role: Dual-output digital controller managing 1.2V core and 3.3V I/O rails with synchronized startup and real-time current monitoring. Use Value: Eliminates external sequencers and ADCs; ±0.5% VOUT accuracy ensures compliance with ASIC voltage tolerance specs under dynamic load. | Use Scenario: High-current CPU/GPU VRM in 1U servers where thermal density and remote power health monitoring are critical. IC Role / Device Role / Timing Role: 6-phase PolyPhase® controller delivering >100A at 0.8V with shared clock and current balancing across phases. Use Value: Reduces input capacitor count by 40% vs single-phase; telemetry enables firmware-driven thermal throttling before overtemperature shutdown. |
| Industrial PLC Power Modules | Automotive ADAS Domain Controllers |
Use Scenario: Distributed power architecture in programmable logic controllers with multiple isolated subsystems and long-term reliability demands. IC Role / Device Role / Timing Role: Primary controller for 5V auxiliary and 1.8V logic rails, storing configuration in EEPROM to survive brownouts and field updates. Use Value: AEC-Q100 qualified (E-grade), fault logging supports ISO 13849 diagnostic coverage reporting for safety-critical systems. | Use Scenario: Power management for radar and camera processing units in autonomous driving systems requiring ASIL-B compliance. IC Role / Device Role / Timing Role: Dual-channel controller sequencing 1.0V SoC core and 1.8V memory rails with programmable OV/UV response and GPIO fault signaling. Use Value: Internal temperature sensing + external TSNS inputs enable dual-point thermal monitoring per ISO 26262 requirements. |
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#TRPBF | Integrated INTVCC regulator (no external 5V required); faster ADC mode (35ms startup vs 120ms); supports VOUT0 up to 5.5V | Better suited for space-constrained designs needing self-contained bias supply; higher VOUT0 headroom for legacy I/O rails | Select when board layout cannot accommodate external 5V supply or when faster power-on sequencing is mandatory |
| TPS53689RTAT | Texas Instruments part with PMBus 1.3 support; lower quiescent current (12mA vs 25mA); no internal EEPROM - relies on host MCU storage | Requires external microcontroller for configuration persistence; optimized for cost-sensitive enterprise SSD and networking gear | Select when system already includes a PMBus host and EEPROM is managed centrally; avoids redundant nonvolatile storage |
Compared with LTC3880EUJ-1#TRPBF, the LTC3887IUJ#TRPBF offers faster startup and integrated biasing but lacks AEC-Q100 qualification, while the TPS53689RTAT reduces BOM cost and IQ but shifts configuration responsibility to the host - making LTC3880EUJ-1#TRPBF optimal for automotive and standalone digital POL applications requiring embedded intelligence and fault resilience.
Availability
LTC3880EUJ-1#TRPBF is available at Aetrix Electronics and suitable for telecom infrastructure, data center server VRMs, and automotive ADAS domain controllers requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant power management.
Supply support for LTC3880EUJ-1#TRPBF 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, communications, and industrial markets since 1965.
The LTC3880/LTC3880-1 product line delivers digitally programmable, telemetry-enabled DC/DC controllers for high-reliability power systems where remote monitoring, fault logging, and configuration persistence are essential - targeting telecom, datacom, and automotive ADAS applications.
FAQ
What is the key functional difference between LTC3880EUJ-1#TRPBF and LTC3880EUJ#TRPBF?
The LTC3880EUJ-1#TRPBF requires an external 5V supply on EXTVCC and omits the internal INTVCC linear regulator present in the LTC3880EUJ#TRPBF. This reduces power loss in high-input-voltage applications and improves efficiency, but mandates external biasing. Both share identical pinout, digital features, and EEPROM functionality. The LTC3880EUJ-1#TRPBF is specified for –40°C to 105°C operation and is AEC-Q100 qualified.
Does LTC3880EUJ-1#TRPBF support true hardware-based power sequencing without host software intervention?
Yes. LTC3880EUJ-1#TRPBF supports autonomous sequencing via RUN0/RUN1 pins, RCONFIG resistors, and internal EEPROM-stored timing parameters. Startup delay, ramp rate, and inter-rail timing can be programmed and retained without active PMBus communication - enabling reliable cold-boot operation in headless systems like base station radios or automotive ECUs.
Can LTC3880EUJ-1#TRPBF monitor both input and output currents simultaneously?
Yes. LTC3880EUJ-1#TRPBF provides dedicated ISENSE0+/– and ISENSE1+/– inputs for per-channel output current sensing, and measures input current (IIN) via the VIN rail using its 10-bit ADC. Telemetry for VIN, IIN, VOUT0, VOUT1, IOUT0, IOUT1, and temperatures is read back concurrently over PMBus, with 90ms round-robin update latency.
What fault conditions trigger the ALERT pin on LTC3880EUJ-1#TRPBF, and how is response configured?
The ALERT pin asserts low on output overvoltage/undervoltage, peak overcurrent, overtemperature (internal or external), VIN OV, bus timeout, or EEPROM CRC error. Response behavior - latch vs. auto-clear, delay, and action (e.g., soft-stop vs. hard shutdown) - is programmable per fault type via PMBus commands MFR_VOUT_OV_FAULT_LIMIT and OPERATION, and stored in EEPROM for persistent operation after reset.
Is LTC3880EUJ-1#TRPBF compatible with LTpowerPlay™ software, and what configuration tasks does it support?
Yes. LTC3880EUJ-1#TRPBF is fully supported by Analog Devices' LTpowerPlay™ GUI, enabling real-time voltage/current/temperature monitoring, drag-and-drop sequencing setup, margining calibration, fault log review, EEPROM store/restore operations, and PMBus command scripting - all without writing custom firmware. Configuration changes made in LTpowerPlay™ can be saved directly to the device's internal EEPROM.
LTC3880EUJ-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC3880EUJ-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3880EUJ-1#TRPBF 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#TRPBF reliable?
The price and inventory of LTC3880EUJ-1#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3880EUJ-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3880EUJ-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3880EUJ-1#TRPBF?
LTC3880EUJ-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3880EUJ-1#TRPBF 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#TRPBF?
For technical support, including LTC3880EUJ-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3880EUJ-1#TRPBF requirements.
6.How does Aetrix verify that LTC3880EUJ-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3880EUJ-1#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3880EUJ-1#TRPBF?
All LTC3880EUJ-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3880EUJ-1#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3880EUJ-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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