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Analog Devices Inc. LTC3882IUJ-1#TRPBF
- Part No.:
- LTC3882IUJ-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC3882IUJ-1#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,142
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Product details
Overview
LTC3882IUJ-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 output 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 LTC3882IUJ-1#TRPBF datasheet, LTC3882IUJ-1#TRPBF pinout, LTC3882IUJ-1#TRPBF application, or LTC3882IUJ-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 QFN package, and support for time- and voltage-based output sequencing.
Technical Context
The LTC3882IUJ-1#TRPBF implements a constant-frequency, leading-edge voltage-mode control architecture optimized for fast transient response and tight regulation across dual independent channels. Each channel supports differential VOUT sensing, IOUT monitoring via ISENSE± inputs, and independent soft-start, margining, and AVP configuration.
Its PMBus interface enables full readback of VIN, VOUT, IOUT, temperature, and fault status, while internal EEPROM stores configuration and logs faults with ECC protection. Phase synchronization (SHARE_CLK), external clock input (SYNC), and hardware RUN/FAULT pins provide deterministic startup and fault containment without host dependency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage 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 stable CPU/GPU supply under dynamic load without external calibration |
| PWM Frequency Range | 250kHz to 1.25MHz - balances efficiency vs. size; avoids 600/750/900/1000kHz per design guidance |
| Current Sensing | Resistor or inductor DCR - enables flexible, low-loss sensing with <±600µV offset referred to ISENSE |
| Digital Interface | PMBus/I²C compliant - supports full telemetry, configuration, and fault logging via LTpowerPlay GUI |
| Package | 40-pin (6mm × 6mm) QFN with exposed GND pad - provides thermal performance (θJC = 2.5°C/W) for high-power density designs |
| Operating Temp | –40°C to +125°C junction - qualified per AEC-Q100 for automotive and industrial environments |
Pinout & Package
40-pin (6mm × 6mm) plastic QFN package with exposed thermal pad (Pin 41 = GND). Requires soldering of exposed pad to PCB for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN, VINSNS | Input voltage sense and supply rail | Monitors 3V–38V input; powers internal regulators and enables UV/OV fault detection |
| PWM0, PWM1 | Gate drive outputs | Drives external high-side FETs or DrMOS; supports up to 1.25MHz switching with 4ns fall time |
| VSENSE0±, VSENSE1± | Differential output voltage sense | Enables Kelvin sensing for ±0.5% regulation; rejects PCB trace IR drop |
| ISENSE0±, ISENSE1± | Differential current sense inputs | Supports resistor or DCR sensing; 70mV full-scale range with <±600µV offset |
| TSNS0, TSNS1 | External temperature sensor inputs | Accepts NTC thermistors or diode sensors; 0.25°C resolution with ±3°C unadjusted error |
| SCL, SDA, ALERT | PMBus serial interface | I²C-compatible bus (up to 400kHz); ALERT asserts open-drain on fault for system-level interrupt |
| RUN0, RUN1 | Hardware enable inputs | Asynchronous, level-sensitive enables for each channel; overrides digital commands during fault |
| PGOOD0, PGOOD1 | Power-good status outputs | Open-drain indicators confirming regulated VOUT within ±5% window and no active faults |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel PolyPhase control | Enables 2–8 phase interleaving across multiple LTC3882-1 units for >100A loads with <1% current imbalance |
| Internal EEPROM with ECC | Stores configuration and fault logs across 10,000 write cycles; retains data ≥10 years at ≤125°C junction |
| Active Voltage Positioning (AVP) | Adjusts VOUT dynamically based on IOUT (e.g., –118mV ∆VOUT at 10% AVP), reducing VRM losses under load |
| Hardware fault response | Hardwired PWM shutdown on OV/UV/OC/OT faults - operates independently of PMBus communication |
| Programmable sequencing | Time-based (TON_DELAY/TON_RISE) or voltage-based (VOUT_MARGIN_HIGH/LOW) sequencing with <50µs resolution |
Applications
| Server VRM | Network Switch PSU |
|---|---|
|
Use Scenario: Regulating 1.2V/70A CPU core voltage in dual-socket x86 servers with dynamic AVP and telemetry. IC Role / Device Role / Timing Role: Dual-channel voltage mode controller managing two independent 4-phase VRMs with synchronized SHARE_CLK. Use Value: ±0.5% VOUT accuracy and real-time IOUT readback enable closed-loop thermal throttling and power capping per Intel VR13/VR14 specs. |
Use Scenario: Powering 12V-to-1V/50A ASIC rails in 1RU network switches requiring strict sequencing and fault isolation. IC Role / Device Role / Timing Role: Primary controller coordinating power-up of FPGA, PHY, and SerDes supplies using time-based TON_DELAY and voltage-based margining. Use Value: Hardware RUN/FAULT pins and dedicated PGOOD outputs allow fail-safe startup without BMC intervention. |
| Automotive ADAS ECU | Industrial PLC Power Module |
|
Use Scenario: Generating 1.8V/20A and 3.3V/15A rails for radar SoCs in AEC-Q100 qualified ADAS domain controllers. IC Role / Device Role / Timing Role: Dual-output controller with internal temperature sensing (TSNS0/TSNS1) and OT fault response for junction monitoring. Use Value: AEC-Q100 qualification and EEPROM fault logging meet ISO 26262 ASIL-B diagnostic coverage requirements. |
Use Scenario: Providing redundant 5V/3A and 24V-to-3.3V/2A supplies in modular PLC backplanes with field-upgradable firmware. IC Role / Device Role / Timing Role: Digital power manager storing configuration in EEPROM and supporting remote updates via PMBus WRITE_PROTECT and STORE_USER_ALL. Use Value: LTpowerPlay GUI integration enables factory calibration and field reconfiguration without hardware changes. |
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 |
|---|---|---|---|
| LTC3883IUJ#TRPBF | Single-output, higher max VOUT (0.5V–5.5V), 2.5MHz max fSW, no VOUT_R1 range | Better suited for single-rail, high-frequency (>1.25MHz) applications; lacks dual-channel interleaving | Select when only one regulated rail is needed and 2.5MHz operation is required. |
| TPS53689RTAT | TI's dual-channel PMBus controller; 4.5V–24V VIN, 0.5V–5.5V VOUT, no internal EEPROM, lower accuracy (±0.5% typical, not guaranteed) | Requires external nonvolatile storage; lacks AVP and factory-default EEPROM retention guarantee | Select for cost-sensitive industrial designs where EEPROM persistence and AVP are not mandatory. |
Compared with LTC3882IUJ-1#TRPBF, the LTC3883IUJ#TRPBF trades dual-channel flexibility for higher-frequency capability and simplified layout, while the TPS53689RTAT offers competitive feature set but omits guaranteed EEPROM retention and AVP precision - making LTC3882IUJ-1#TRPBF optimal for mission-critical, multi-rail, long-lifecycle systems.
Availability
LTC3882IUJ-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 AEC-Q100 compliance.
Supply support for LTC3882IUJ-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 healthcare markets.
The LTC3882 product line delivers digitally managed, dual-output PolyPhase controllers for high-current, high-efficiency DC/DC conversion in space-constrained, thermally demanding applications such as AI accelerators and 5G baseband units.
FAQ
What is the maximum supported switching frequency for LTC3882IUJ-1#TRPBF?
The LTC3882IUJ-1#TRPBF supports a programmable PWM frequency range of 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 LTC3882IUJ-1#TRPBF does not support the 2.5MHz mode - that is exclusive to the LTC3882-2 variant.
Does LTC3882IUJ-1#TRPBF support both resistor-based and DCR-based current sensing?
Yes, the LTC3882IUJ-1#TRPBF supports both methods. Its ISENSE± inputs accept either discrete sense resistors or inductor DCR voltage drops. The device includes programmable gain and offset compensation to achieve <±600µV referred-to-input offset, ensuring accurate current measurement regardless of sensing method selected in the design.
How does the internal EEPROM in LTC3882IUJ-1#TRPBF enhance system reliability?
The LTC3882IUJ-1#TRPBF integrates EEPROM with ECC protection to store configuration settings and fault logs across power cycles. It guarantees ≥10,000 write cycles and ≥10 years of data retention at ≤125°C junction temperature. This eliminates reliance on external memory and enables autonomous restart with validated settings after brownout or reset - critical for unattended infrastructure equipment.
Can LTC3882IUJ-1#TRPBF operate in 8-phase configurations?
Yes. Up to four LTC3882IUJ-1#TRPBF devices can be synchronized via the SHARE_CLK pin to implement 2-, 3-, 4-, 6-, or 8-phase operation. Each device controls two phases, enabling precise current sharing (<1% imbalance) across all phases using the internal PolyPhase® algorithm - ideal for >100A CPU/GPU VRMs.
Is LTC3882IUJ-1#TRPBF qualified for automotive applications?
Yes. The LTC3882IUJ-1#TRPBF is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C). Its internal temperature sensors (TSNS0/TSNS1), hardware fault response, and EEPROM fault logging meet functional safety requirements for ADAS and domain controller power systems. Automotive-grade variants carry the #W suffix (e.g., LTC3882IUJ-1#WTRPBF), but the standard #TRPBF part also meets AEC-Q100 stress test requirements.
LTC3882IUJ-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)
LTC3882IUJ-1#TRPBF FAQ
1.How can I place an order for LTC3882IUJ-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3882IUJ-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 LTC3882IUJ-1#TRPBF reliable?
The price and inventory of LTC3882IUJ-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 LTC3882IUJ-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3882IUJ-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3882IUJ-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3882IUJ-1#TRPBF?
LTC3882IUJ-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3882IUJ-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 LTC3882IUJ-1#TRPBF?
For technical support, including LTC3882IUJ-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3882IUJ-1#TRPBF requirements.
6.How does Aetrix verify that LTC3882IUJ-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3882IUJ-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 LTC3882IUJ-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3882IUJ-1#TRPBF?
All LTC3882IUJ-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3882IUJ-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 LTC3882IUJ-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3882IUJ-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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