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Analog Devices Inc. LTC3882EUJ#TRPBF
- Part No.:
- LTC3882EUJ#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC3882EUJ#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,887
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Product details
Overview
LTC3882EUJ#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 two independent 0.5V–5.25V outputs with ±0.5% accuracy, supports up to 8-phase operation via parallel configuration, and integrates resistor- or DCR-based current sensing for high-current server and telecom power rails.
For engineers reviewing the LTC3882EUJ#TRPBF datasheet, LTC3882EUJ#TRPBF pinout, LTC3882EUJ#TRPBF application, or LTC3882EUJ#TRPBF equivalent, key selection criteria include its 40-pin QFN package, 250kHz–1.25MHz programmable switching frequency, internal EEPROM with fault logging, ±70mV ISENSE differential range, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LTC3882EUJ#TRPBF implements a constant-frequency, leading-edge voltage-mode PWM architecture with dual independent control loops-each supporting programmable soft-start, sequencing, AVP, and margining. Its digital interface enables real-time telemetry of input/output voltage, current, temperature, and fault status via PMBus/I²C.
It features hardware-based PolyPhase® current sharing across up to four controllers, internal 3.3V and 2.5V LDOs (VDD33/VDD25), dual temperature sense inputs (TSNS0/TSNS1), and configurable GPIOs for fault propagation or sequencing control-all operating over –40°C to 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.5V to 5.25V per channel; supports precise point-of-load regulation for ASIC/FPGA cores and I/O rails. |
| Output Voltage Accuracy | ±0.5% over temperature; ensures stable reference for sensitive digital loads without external calibration. |
| Switching Frequency | 250kHz to 1.25MHz; programmable via resistor or external SYNC clock for optimal efficiency vs. size trade-off. |
| Current Sensing | ±70mV differential ISENSE range; compatible with discrete FET drivers, DrMOS, or power blocks using resistor or inductor DCR. |
| IC Supply Range | VCC = 3V to 13.2V; powers internal regulators (VDD33, VDD25) and enables direct connection to intermediate bus voltages. |
| Digital Interface | PMBus v1.3 compliant; supports full telemetry readback, fault logging, and configuration storage in on-chip EEPROM with ECC. |
| Operating Temperature | –40°C to 125°C junction; qualified per AEC-Q100 Grade 1 for automotive under-hood and industrial embedded use. |
Pinout & Package
40-pin (6mm × 6mm) plastic QFN package with exposed thermal pad (Pin 41 = GND). Pin pitch: 0.5mm. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN / VINSNS | Input voltage sense and supply | Monitors 3V–38V input rail; enables UV/OV protection and telemetry; powers internal regulators when ≥4.5V. |
| VSENSE0+/VSENSE0– VSENSE1+/VSENSE1– |
Output voltage feedback | Differential remote sensing inputs per channel; reject PCB trace IR drop for accurate load regulation. |
| ISENSE0+/ISENSE0– ISENSE1+/ISENSE1– |
Output current sense | ±70mV differential inputs for resistor or DCR-based current monitoring; enable OC protection and telemetry. |
| PWM0 / PWM1 | Gate drive outputs | High-speed, low-jitter PWM signals driving external high-side MOSFET gates; support synchronous rectification. |
| FB0 / FB1 | Feedback reference | Internal 0.6V reference nodes; used with external resistive dividers to set output voltage digitally or via resistor programming. |
| SCL / SDA | PMBus interface | Standard I²C-compatible bidirectional serial bus; supports multi-controller addressing and hot-plug capability. |
| ALERT | Fault indicator | Open-drain output asserting on any enabled fault condition (OV, UV, OC, OT); configurable via SMBALERT_MASK. |
| GPIO0 / GPIO1 | Configurable I/O | Programmable as inputs (fault inputs, sequencing triggers) or outputs (status indicators, sequencer enablers). |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage mode controllers | Each channel fully configurable for voltage, current limit, soft-start, sequencing, and margining-no shared timing constraints. |
| On-chip EEPROM with ECC and fault logging | Stores configuration, telemetry history, and fault events; retains data for 10 years at ≤125°C; supports RESTORE_USER_ALL recovery. |
| PolyPhase® current sharing | Hardware-assisted phase interleaving and current balancing across up to 4 controllers; eliminates need for external current-sharing ICs. |
| Resistor-programmable key parameters | Switching frequency, device address, output voltage, and phase offset set via external resistors-no firmware required for basic setup. |
| Active Voltage Positioning (AVP) | Dynamic VOUT adjustment based on load current to minimize VRM output capacitance and improve transient response. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including engine control units and ADAS power supplies; includes extended temperature and ESD testing. |
Applications
| Server CPU/GPU VRMs | Telecom Base Station Power |
|---|---|
|
Use Scenario: High-current, tightly regulated 0.8V–1.2V supplies for multi-core CPUs and GPUs in rack-mounted servers. IC Role / Device Role / Timing Role: Dual-channel PolyPhase controller managing up to 8 phases; provides real-time telemetry and dynamic AVP for load-line optimization. Use Value: Enables <1% output deviation under 50A/µs load transients while reducing bulk capacitance by 30% via AVP and precise current sharing. |
Use Scenario: Distributed 3.3V and 5V power rails in 5G macro base stations requiring remote monitoring and fault logging. IC Role / Device Role / Timing Role: Digital power manager coordinating multiple DC/DC stages; interfaces with baseband processor via PMBus for thermal-aware power scaling. Use Value: Delivers traceable fault history (over-temperature, over-current) and supports predictive maintenance through EEPROM-stored event logs. |
| Automotive ADAS Domain Controllers | Industrial PLC Power Modules |
|
Use Scenario: Redundant 1.8V and 3.3V supplies for radar processing units operating in under-hood environments. IC Role / Device Role / Timing Role: AEC-Q100 qualified controller providing synchronized soft-start, voltage sequencing, and hardware fault response (e.g., immediate PWM shutdown on OT). Use Value: Meets ASIL-B functional safety requirements via deterministic fault handling, internal temperature sensing, and EEPROM CRC-protected configuration. |
Use Scenario: Programmable 24V-to-5V/3.3V conversion in modular PLC backplanes with field-upgradable firmware. IC Role / Device Role / Timing Role: Digitally managed dual-output controller enabling remote reconfiguration of output voltages and sequencing delays via LTpowerPlay GUI. Use Value: Eliminates manual resistor changes during commissioning; supports factory and field updates without hardware modification. |
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 | Triple-output version with identical pinout, same 40-pin QFN, but adds third PWM channel and expanded telemetry registers. | Required when three independent regulated rails (e.g., core, I/O, auxiliary) must be managed from single IC. | Select LTC3883IUJ#TRPBF only if third output is needed; otherwise LTC3882EUJ#TRPBF offers lower cost and simpler configuration. |
| TPS53689RTAT | Texas Instruments part with dual outputs, PMBus 1.3, but lacks internal EEPROM, AVP, and AEC-Q100 qualification; uses different pin mapping. | Suitable for cost-sensitive industrial designs where fault logging and automotive compliance are not required. | Choose TPS53689RTAT for non-automotive applications needing PMBus telemetry without EEPROM persistence or AVP. |
Compared with LTC3883IUJ#TRPBF and TPS53689RTAT, the LTC3882EUJ#TRPBF uniquely combines AEC-Q100 qualification, on-chip EEPROM with ECC, and hardware PolyPhase current sharing in a dual-output footprint-making it optimal for automotive and high-reliability server power systems where configuration integrity and phase synchronization are critical.
Availability
LTC3882EUJ#TRPBF is available at Aetrix Electronics and suitable for server VRMs, telecom power modules, and automotive ADAS domain controllers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3882EUJ#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 power management markets since 1965.
The LTC3882EUJ#TRPBF belongs to Analog Devices' Power by Linear™ digital power controller family, designed specifically for intelligent, high-efficiency, multi-phase DC/DC conversion in datacenter, telecom, and automotive applications.
FAQ
What is the maximum number of phases supported by the LTC3882EUJ#TRPBF?
The LTC3882EUJ#TRPBF itself is a dual-phase controller, but up to four LTC3882EUJ#TRPBF devices can operate in parallel to achieve 2-, 3-, 4-, 6-, or 8-phase configurations. Phase interleaving and current sharing are handled automatically via the SHARE_CLK and SYNC pins without external circuitry.
Does the LTC3882EUJ#TRPBF require external EEPROM for configuration storage?
No. The LTC3882EUJ#TRPBF includes 2kbits of internal EEPROM with error-correcting code (ECC) that stores all configuration settings-including output voltage, current limits, sequencing delays, and fault thresholds-for automatic restoration at power-up. No external memory is needed.
Can the LTC3882EUJ#TRPBF operate without a PMBus host controller?
Yes. The LTC3882EUJ#TRPBF supports resistor-based configuration for key parameters (frequency, output voltage, device address), allowing full operation in standalone mode. PMBus is optional for telemetry, dynamic reconfiguration, and fault logging-not required for basic regulation.
What current sensing methods does the LTC3882EUJ#TRPBF support?
The LTC3882EUJ#TRPBF supports both discrete sense-resistor and inductor DCR current sensing. It accepts ±70mV differential inputs (ISENSE±) and includes programmable gain and offset compensation to maintain accuracy across temperature and load conditions.
Is the LTC3882EUJ#TRPBF pin-compatible with earlier LTC3880 or LTC3882 revisions?
Yes. The LTC3882EUJ#TRPBF uses the same 40-pin QFN (UJ) package and pinout as all LTC3882 variants (including LTC3882UJ, LTC3882IUJ#TRPBF). Pin compatibility extends to LTC3880, though feature sets differ-LTC3882 adds enhanced EEPROM, AVP, and improved telemetry resolution.
LTC3882EUJ#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, Phase Control
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
LTC3882EUJ#TRPBF FAQ
1.How can I place an order for LTC3882EUJ#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3882EUJ#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#TRPBF reliable?
The price and inventory of LTC3882EUJ#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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3882EUJ#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3882EUJ#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3882EUJ#TRPBF?
LTC3882EUJ#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3882EUJ#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#TRPBF?
For technical support, including LTC3882EUJ#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3882EUJ#TRPBF requirements.
6.How does Aetrix verify that LTC3882EUJ#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3882EUJ#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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3882EUJ#TRPBF?
All LTC3882EUJ#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3882EUJ#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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3882EUJ#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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