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Analog Devices Inc. LTC3882EUJ#PBF
- Part No.:
- LTC3882EUJ#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC3882EUJ#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:157
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Product details
Overview
LTC3882EUJ#PBF 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 independently programmable outputs (0.5V–5.25V), supports up to 8-phase operation via parallel configuration, and integrates internal EEPROM with fault logging and ECC. It is used in high-current server VRMs where precise telemetry, sequencing, and AVP are required.
For engineers reviewing the LTC3882EUJ#PBF datasheet, LTC3882EUJ#PBF pinout, LTC3882EUJ#PBF application, or LTC3882EUJ#PBF equivalent, key selection criteria include ±0.5% output voltage accuracy, resistor- or DCR-based current sensing, 250kHz–1.25MHz programmable switching frequency, AEC-Q100 qualification, and 40-pin QFN (6mm × 6mm) package compatibility with thermal pad grounding.
Technical Context
The LTC3882EUJ#PBF implements a constant-frequency, leading-edge voltage-mode PWM architecture with dual independent control loops, enabling fast transient response and tight regulation across both channels. Each channel supports programmable soft-start/stop, time- or voltage-based sequencing, active voltage positioning (AVP), and margining - all configurable via PMBus or stored in internal EEPROM.
It features dual I²C/PMBus-compliant serial interfaces (SCL/SDA), hardware alert signaling (ALERT), GPIOs for fault propagation, and dedicated pins for phase synchronization (SYNC), current sharing (SHARE_CLK), and external temperature monitoring (TSNS0/TSNS1). The device operates from a 3V–13.2V IC supply and accepts input voltages up to 38V via VINSNS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.5V to 5.25V per channel; supports dual independent rail generation with ±0.5% accuracy over temperature and line/load. |
| Switching Frequency | 250kHz to 1.25MHz; programmable via resistor or external SYNC clock; avoids restricted frequencies (600/750/900kHz, 1MHz). |
| Current Sensing | Resistor or inductor DCR sensing; ±70mV differential input range; ±1% total unadjusted readback error for IOUT telemetry. |
| Telemetry Resolution | VOUT: 16-bit (244µV LSB); IOUT: 10-bit at low range (15.625µV LSB); VIN: 10-bit; temperature: 0.25°C resolution. |
| EEPROM | Internal nonvolatile memory with ECC and CRC; 10,000 write cycles; 10-year data retention at TJ ≤ 125°C. |
| Operating Temp | –40°C to +125°C junction; AEC-Q100 qualified; thermal shutdown protection included. |
| Digital Interface | PMBus v1.3 compliant; 10–400kHz SCL; supports READ_VOUT, READ_IOUT, READ_TEMPERATURE_1/2, CLEAR_FAULTS, STORE_USER_ALL. |
Pinout & Package
Package: 40-lead (6mm × 6mm) plastic QFN with exposed thermal pad (Pin 41 = GND), lead-free finish, RoHS compliant. Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main IC supply input | 3V–13.2V input for internal regulators; powers VCC, VDD33, VDD25. |
| VINSNS | Input voltage sense input | Monitors input rail (3V–38V range) for UV/OV fault detection and telemetry. |
| PWM0 / PWM1 | Gate drive outputs | High-speed, open-drain PWM signals driving external high-side FETs or DrMOS modules. |
| FB0 / FB1 | Feedback inputs | Resistive divider inputs for closed-loop VOUT regulation; support remote sensing via VSENSE± pairs. |
| VSENSE0+/– / VSENSE1+/– | Differential voltage sense | Enable Kelvin-connected remote sensing to eliminate PCB trace IR drop errors. |
| ISENSE0+/– / ISENSE1+/– | Differential current sense | Accept ±70mV differential signal from sense resistor or DCR network for accurate IOUT measurement. |
| TSNS0 / TSNS1 | Temperature sensor inputs | Analog inputs for external NTC thermistors or diode-connected transistors; enable board-level thermal monitoring. |
| SCL / SDA | PMBus interface | Standard I²C-compatible bidirectional bus; supports multi-device addressing and fault reporting via ALERT. |
| ALERT | Open-drain fault indicator | Active-low signal asserted on any fault condition (OV/UV/OC/OT); configurable via SMBALERT_MASK register. |
| RUN0 / RUN1 | Enable inputs | Hardware-controlled channel enable/disable; can be tied high or driven by sequencer logic. |
| GPIO0 / GPIO1 | Configurable I/O | Programmable as inputs (fault inputs) or outputs (status indicators); mapped to MFR_GPIO_PROPAGATE_LTC3882. |
| SYNC / SHARE_CLK | Timing synchronization | SYNC accepts external clock for frequency locking; SHARE_CLK enables accurate PolyPhase current sharing across multiple controllers. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage rails | Each channel fully configurable for VOUT, current limit, soft-start, sequencing, and AVP - no shared registers or coupling. |
| Real-time telemetry with EEPROM logging | Reads VIN, VOUT, IOUT, temperature every 90ms; logs faults with timestamp/ECC in internal EEPROM for post-fault analysis. |
| Hardware-based fault response | Hardwired PWM disable on OV/UV/OC/OT faults within <1µs; eliminates software latency in critical protection paths. |
| Flexible current sensing | Supports precision shunt resistors or cost-effective DCR sensing with programmable gain/offset compensation (IOUT_CAL_GAIN, MFR_IOUT_CAL_GAIN_TC). |
| Robust digital interface | PMBus v1.3 compliance with timeout detection, CRC checksums, and command retry logic (MFR_RETRY_DELAY) for noise-immune communication. |
| AEC-Q100 automotive qualification | Validated for automotive environments (–40°C to +125°C); includes enhanced ESD protection and extended EEPROM reliability under thermal cycling. |
Applications
| Server VRM Power Delivery | Network Equipment PSU |
|---|---|
Use Scenario: High-density 1V/80A CPU core rail in dual-socket x86 server motherboard. IC Role / Device Role / Timing Role: Dual-phase controller managing two interleaved 40A phases with synchronized PWM and current sharing. Use Value: Enables ±0.5% output regulation under dynamic load steps while providing real-time telemetry for firmware-based thermal throttling and power capping. | Use Scenario: Programmable 3.3V and 12V auxiliary rails in 1RU switch PSU with remote management. IC Role / Device Role / Timing Role: Dual-rail controller delivering independent sequencing, margining, and PMBus telemetry to BMC via I²C bus. Use Value: Eliminates discrete supervisor ICs; reduces BOM count by integrating voltage/current/temp monitoring and fault logging into single controller. |
| Industrial PLC Power Module | Automotive ADAS Domain Controller |
Use Scenario: 5V and 3.3V isolated power rails in ruggedized programmable logic controller with wide input range. IC Role / Device Role / Timing Role: Primary controller for non-isolated buck stages feeding downstream isolated DC/DC converters. Use Value: Resistor-programmable startup timing and UV/OV thresholds simplify design for 24V/48V industrial input; EEPROM retains custom settings across power cycles. | Use Scenario: 1.8V and 1.2V core/memory rails in radar processing unit requiring AEC-Q100 compliance. IC Role / Device Role / Timing Role: Automotive-grade dual-output controller with hardware fault response and extended temperature operation. Use Value: Meets ASIL-B functional safety requirements via deterministic hardwired fault handling and ECC-protected EEPROM for configuration persistence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883IUJ#PBF | Triple-output version; adds third independent channel and extra GPIO; same pinout and EEPROM architecture. | Required when three regulated rails must be managed with synchronized telemetry and sequencing. | Select LTC3883IUJ#PBF only if third output is needed; otherwise LTC3882EUJ#PBF offers lower cost and smaller footprint. |
| TPS53689RTAT | TI dual-channel PMBus controller; supports 4-phase per channel; lacks internal EEPROM and AVP; uses different register map. | Used in cost-sensitive telecom systems where external microcontroller handles configuration storage and sequencing logic. | Choose TPS53689RTAT for higher phase count per channel and TI ecosystem integration; avoid if EEPROM persistence or AVP is required. |
Compared with LTC3883IUJ#PBF and TPS53689RTAT, the LTC3882EUJ#PBF uniquely balances dual-rail precision, on-chip fault logging, and AEC-Q100 qualification - making it optimal for space-constrained, safety-aware, or firmware-light designs where configuration retention and deterministic protection are critical.
Availability
LTC3882EUJ#PBF is available at Aetrix Electronics and suitable for server VRMs, network equipment PSUs, and automotive ADAS domain controllers requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant power management.
Supply support for LTC3882EUJ#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 industrial, automotive, communications, and computing markets.
The LTC3882EUJ#PBF belongs to the LTC® Digital Power System Management (DPSM) product line, designed specifically for intelligent, telemetry-rich, and highly configurable DC/DC power conversion in mission-critical infrastructure.
FAQ
What is the operating temperature range for the LTC3882EUJ#PBF?
The LTC3882EUJ#PBF is rated for –40°C to +125°C junction temperature. It is AEC-Q100 qualified and specified across this full range, with internal thermal protection activating above TJMAX = 125°C. Derating guidance for EEPROM retention applies above 125°C, but normal operation remains valid up to the absolute maximum rating.
Does the LTC3882EUJ#PBF support both resistor-based and digital configuration?
Yes, the LTC3882EUJ#PBF supports dual configuration modes: key parameters like switching frequency, output voltage, device address, and phase offset can be set using external resistors (e.g., FREQ_CFG, VOUT0_CFG), or programmed digitally via PMBus and stored in internal EEPROM for automatic restoration at power-up.
Can the LTC3882EUJ#PBF operate without an external microcontroller?
Yes, the LTC3882EUJ#PBF can operate autonomously using resistor-programmed defaults and internal EEPROM-stored settings. While LTpowerPlay® software enables full digital configuration, the device boots and regulates with factory or user-defined values without host intervention - ideal for firmware-light or boot-critical applications.
What current sensing methods does the LTC3882EUJ#PBF support?
The LTC3882EUJ#PBF supports both precision shunt resistor sensing (via ISENSE± differential inputs) and inductor DCR sensing (with programmable gain and temperature compensation via MFR_IOUT_CAL_GAIN_TC). Both methods deliver ±1% total unadjusted readback error and feed into the same telemetry and protection circuitry.
Is the LTC3882EUJ#PBF pin-compatible with other members of the LTC388x family?
No, the LTC3882EUJ#PBF is not pin-compatible with LTC3883 or LTC3884. While all share the 40-pin QFN package and similar pin functions, pin assignments for GPIOs, configuration resistors, and telemetry inputs differ. Refer to the respective Pin Configuration diagrams in each datasheet before substitution.
LTC3882EUJ#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:
- 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#PBF FAQ
1.How can I place an order for LTC3882EUJ#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3882EUJ#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 LTC3882EUJ#PBF reliable?
The price and inventory of LTC3882EUJ#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3882EUJ#PBF is usually 5 days.
3.What payment methods are accepted for LTC3882EUJ#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3882EUJ#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3882EUJ#PBF?
LTC3882EUJ#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3882EUJ#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 LTC3882EUJ#PBF?
For technical support, including LTC3882EUJ#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3882EUJ#PBF requirements.
6.How does Aetrix verify that LTC3882EUJ#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3882EUJ#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 LTC3882EUJ#PBF meets industry standards.
7.What is the process for return or replacement of LTC3882EUJ#PBF?
All LTC3882EUJ#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3882EUJ#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 LTC3882EUJ#PBF part is unused and in its original packaging.
Return procedure for LTC3882EUJ#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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