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Analog Devices Inc. LTC3882EUJ-1#TRPBF
- Part No.:
- LTC3882EUJ-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC3882EUJ-1#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,732
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Product details
Overview
LTC3882EUJ-1#TRPBF from Analog Devices is a dual-output, PolyPhase synchronous step-down DC/DC voltage mode controller with PMBus-compliant digital power system management. It delivers 0.1V–5.25V outputs per channel, supports up to 8-phase operation via parallel configuration, and achieves ±0.5% output voltage accuracy with internal EEPROM fault logging. It is used in high-current server VRMs where precise telemetry, sequencing, and AVP are required.
For engineers reviewing the LTC3882EUJ-1#TRPBF datasheet, LTC3882EUJ-1#TRPBF pinout, LTC3882EUJ-1#TRPBF application, or LTC3882EUJ-1#TRPBF equivalent, key selection criteria include its 250kHz–1.25MHz programmable PWM frequency, resistor- or DCR-based current sensing, AEC-Q100 qualification, 40-pin 6mm × 6mm QFN package, and dual-channel independent voltage servo capability.
Technical Context
The LTC3882EUJ-1#TRPBF implements a constant-frequency, leading-edge voltage-mode control architecture with two independent PWM channels, each supporting 0.1V–5.25V output regulation using external power stages (e.g., DrMOS, power blocks, or discrete FET drivers). Its digital interface enables real-time readback of input/output voltage, current, temperature, and fault status via PMBus commands.
It integrates internal 3.3V and 2.5V LDOs (VDD33/VDD25), supports both resistor-programmed and EEPROM-stored configuration, and features hardware-fault response including hardwired PWM shutdown on overvoltage, overcurrent, or overtemperature events. Phase synchronization and accurate PolyPhase current sharing are enabled via SHARE_CLK and SYNC pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT Range | 0.1V to 5.25V per channel - supports core, I/O, and auxiliary rails in multi-rail systems |
| Output Voltage Accuracy | ±0.5% - ensures tight regulation for sensitive ASIC/FPGA supplies without external trimming |
| PWM Frequency Range | 250kHz to 1.25MHz - balances efficiency vs. size; excludes deprecated 600/750/900kHz/1MHz points |
| Current Sensing | Resistor or inductor DCR - enables flexible layout with minimal BOM cost or thermal drift compensation |
| Digital Interface | PMBus/I²C compliant - allows full telemetry, configuration, and fault logging without custom firmware |
| Package | 40-pin (6mm × 6mm) QFN with exposed GND pad - optimized for thermal dissipation in high-power VRMs |
| Operating Temp | –40°C to +125°C junction - qualified for industrial and automotive under AEC-Q100 Grade 1 |
Pinout & Package
40-pin, 6mm × 6mm plastic QFN (UJ package) with exposed thermal pad (Pin 41 = GND). Designed for high-current, low-inductance PCB layouts with dedicated ground planes and thermal vias under the pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ISENSE0+/–, ISENSE1+/– | Differential current sense inputs | Accept ±70mV differential signals for accurate phase current monitoring and PolyPhase sharing |
| VSENSE0+/–, VSENSE1+/– | Differential output voltage sense inputs | Enable Kelvin sensing for ±0.5% regulation accuracy; reject PCB trace IR drop |
| PWM0, PWM1 | Gate drive outputs | Push-pull outputs driving external high-side FETs or DrMOS inputs; 2.7V min VOH at 2mA |
| SHARE_CLK, SYNC | Phase synchronization terminals | Enable master-slave timing alignment across multiple LTC3882EUJ-1#TRPBF devices for up to 8-phase operation |
| SCL, SDA, ALERT | PMBus interface signals | Support standard SMBus timing (up to 400kHz); ALERT asserts open-drain on fault detection |
| PGOOD0, PGOOD1 | Power-good status outputs | Open-drain indicators per channel; assert after soft-start completion and within UV/OV limits |
Key Features
| Feature | Design Value |
|---|---|
| Internal EEPROM with ECC | Stores configuration, fault logs, and calibration data; retains >10 years at ≤125°C junction |
| Hardware Fault Response | Hardwired PWM disable on VOUT OV/UV, IOUT OC, or OT faults - no software dependency for safety |
| Active Voltage Positioning (AVP) | Adjusts VOUT dynamically based on load current (e.g., –118mV ∆VOUT at 10% AVP) to reduce VRM losses |
| Time- and Voltage-Based Sequencing | Independent TON_DELAY, TON_RISE, TOFF_DELAY, and VOUT-based ramp thresholds per channel |
| Resistor Configuration Support | FREQ_CFG, PHAS_CFG, VOUT0_CFG, VOUT1_CFG pins allow analog setup without digital programming |
Applications
| Server VRM | Network Switch PSU |
|---|---|
|
Use Scenario: Regulating 1.2V/70A CPU core supply with dynamic AVP and telemetry-driven thermal throttling. IC Role / Device Role / Timing Role: Dual-channel PolyPhase controller managing two interleaved 35A phases with synchronized PWM and shared current sensing. Use Value: ±0.5% voltage accuracy and real-time IOUT readback enable closed-loop power optimization and predictive failure analysis. |
Use Scenario: Powering 12-port 10G Ethernet PHYs requiring tightly sequenced 1.8V, 3.3V, and 12V rails. IC Role / Device Role / Timing Role: Primary controller for 1.8V/30A rail; coordinates startup timing and margining with secondary controllers via PMBus. Use Value: Time-based sequencing (TON_DELAY/TON_RISE) and voltage-based ramping ensure safe PHY initialization without external logic. |
| Automotive ADAS ECU | Industrial FPGA Power System |
|
Use Scenario: Supplying 0.85V/40A AI accelerator in AEC-Q100-compliant autonomous driving module. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 dual-output controller with internal temperature sensing and fault logging for functional safety compliance. Use Value: Internal EEPROM fault logs and hardwired OT/OC shutdown meet ASIL-B diagnostic coverage requirements. |
Use Scenario: Delivering 1.0V/50A and 1.8V/25A to Xilinx Kintex Ultrascale+ FPGA with dynamic load-step response. IC Role / Device Role / Timing Role: Dual-channel controller operating in 4-phase (2+2) mode with SHARE_CLK-synchronized current sharing. Use Value: Accurate PolyPhase current sharing (±300µV offset) maintains phase balance under 100A/ns transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital multiphase controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2960A from Monolithic Power Systems | Single-chip 2-phase controller with integrated MOSFET drivers; lacks internal EEPROM and AVP | Targeted at cost-sensitive telecom PSUs; no fault logging or servo-based voltage adjustment | Choose MP2960A when board space and BOM count are critical, but digital telemetry and long-term configuration persistence are not required. |
| TDA38821 from Infineon | Pin-compatible upgrade with 2.5MHz max switching frequency and enhanced PMBus command set | Designed for next-gen AI accelerators needing higher-frequency operation and extended telemetry resolution | Choose TDA38821 when migrating to 2.5MHz operation or requiring extended PMBus diagnostics beyond LTC3882EUJ-1#TRPBF's feature set. |
Compared with MP2960A and TDA38821, the LTC3882EUJ-1#TRPBF uniquely combines EEPROM-based fault logging, hardware AVP, and AEC-Q100 qualification in a single 40-pin QFN - making it optimal for high-reliability, telemetry-rich, automotive-grade or enterprise server applications where configuration retention and deterministic fault response are mandatory.
Availability
LTC3882EUJ-1#TRPBF is available at Aetrix Electronics and suitable for server VRMs, network switch PSUs, and automotive ADAS ECUs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3882EUJ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and computing markets.
The LTC3882EUJ-1#TRPBF belongs to Analog Devices' Power by Linear™ digital power management product line, designed specifically for intelligent, high-efficiency, multi-phase DC/DC conversion in datacenter, networking, and automotive electronics.
FAQ
What is the maximum supported switching frequency for the LTC3882EUJ-1#TRPBF?
The LTC3882EUJ-1#TRPBF supports a programmable PWM frequency range from 250kHz to 1.25MHz. Note that Analog Devices explicitly advises against using 600kHz, 750kHz, 900kHz, or 1MHz in new designs due to suboptimal efficiency and noise performance. The LTC3882EUJ-1#TRPBF does not support 2.5MHz operation - that capability is exclusive to the LTC3882-2 variant.
Does the LTC3882EUJ-1#TRPBF support AEC-Q100 qualification?
Yes, the LTC3882EUJ-1#TRPBF is AEC-Q100 qualified for automotive applications (Grade 1, –40°C to +125°C junction). This qualification covers stress testing for temperature cycling, humidity, ESD, and latch-up, confirming suitability for ADAS and infotainment ECUs. The part marking "UJ" and suffix "#TRPBF" denote the commercial-grade version, while automotive variants use the "#W" suffix (e.g., LTC3882IUJ-1#WTRPBF).
How does the LTC3882EUJ-1#TRPBF implement Active Voltage Positioning (AVP)?
The LTC3882EUJ-1#TRPBF implements AVP by dynamically adjusting the commanded output voltage downward as load current increases - reducing conduction losses in downstream FETs. For example, with AVP = 10% and VOUT_COMMAND = 1.8V, the device delivers ∆VOUT ≈ –108mV at full-scale IOUT. This function is configured via PMBus command MFR_VOUT_AVP and operates independently per channel using real-time ISENSE feedback.
Can the LTC3882EUJ-1#TRPBF operate without a microcontroller or PMBus host?
Yes, the LTC3882EUJ-1#TRPBF can operate autonomously using resistor-programmed configuration. Pins FREQ_CFG, PHAS_CFG, VOUT0_CFG, and VOUT1_CFG allow setting switching frequency, phase count, and nominal output voltages without digital communication. Default startup behavior uses factory EEPROM values, and all critical functions - including PWM generation, fault protection, and PGOOD assertion - remain fully active without host interaction.
What current sensing methods does the LTC3882EUJ-1#TRPBF support?
The LTC3882EUJ-1#TRPBF supports two precision current sensing methods: discrete sense-resistor (via ISENSE0+/– and ISENSE1+/–) and inductor DCR sensing (using VSENSE0+/– and VSENSE1+/– with external RC network). Both methods provide ±70mV differential input range and are validated for PolyPhase current sharing accuracy within ±300µV offset. Resistor sensing offers higher accuracy at light loads; DCR reduces power loss and component count.
LTC3882EUJ-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:
- PWM Signal
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 13.8V
- Frequency - Switching:
- 500kHz
- Duty Cycle (Max):
- 87.5%
- Synchronous Rectifier:
- No
- Clock Sync:
- Yes
- Serial Interfaces:
- I2C, PMBus
- Control Features:
- Enable, Frequency Control, Phase Control, Power Good
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
LTC3882EUJ-1#TRPBF FAQ
1.How can I place an order for LTC3882EUJ-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3882EUJ-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 LTC3882EUJ-1#TRPBF reliable?
The price and inventory of LTC3882EUJ-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 LTC3882EUJ-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3882EUJ-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3882EUJ-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3882EUJ-1#TRPBF?
LTC3882EUJ-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3882EUJ-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 LTC3882EUJ-1#TRPBF?
For technical support, including LTC3882EUJ-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3882EUJ-1#TRPBF requirements.
6.How does Aetrix verify that LTC3882EUJ-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3882EUJ-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 LTC3882EUJ-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3882EUJ-1#TRPBF?
All LTC3882EUJ-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3882EUJ-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 LTC3882EUJ-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3882EUJ-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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