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Analog Devices Inc. LTC3883EUH#WTRPBF
- Part No.:
- LTC3883EUH#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC3883EUH#WTRPBF.pdf
- Description:
- 1X PHBUCK DC/DC CNTR W/ DIG PWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,276
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Product details
Overview
LTC3883EUH#WTRPBF from Analog Devices is a PMBus/I²C-compliant, polyphase-capable synchronous step-down DC/DC controller with digital power system management. It delivers ±0.5% output voltage accuracy over temperature, supports 4.5V–24V input and 0.5V–5.4V output ranges, integrates 16-bit ADC/12-bit DAC, and enables telemetry read-back of VIN, IIN, VOUT, IOUT, and temperature - used in high-current telecom and distributed power systems.
For engineers reviewing the LTC3883EUH#WTRPBF datasheet, LTC3883EUH#WTRPBF pinout, LTC3883EUH#WTRPBF application, or LTC3883EUH#WTRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade AEC-Q100 qualification, real-world sequencing/margining capabilities, and precise alternative part comparisons for power system design and BOM optimization.
Technical Context
The LTC3883EUH#WTRPBF implements an analog current-mode control loop with auto-calibrated inductor DCR sensing, enabling accurate PolyPhase® current sharing across up to six phases. Its integrated high-side current sense amplifier and internal 5V linear regulator (INTVCC) support self-contained operation without external bias rails.
It features a constant-frequency PWM architecture synchronized from 250kHz to 1MHz via external SYNC or internal oscillator, with programmable soft-start/stop, voltage/current margining, OV/UV/OC fault protection, and EEPROM-based fault logging with ECC. The device operates in Burst Mode®, discontinuous, or continuous conduction mode under digital command.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 24V - supports wide-range industrial and automotive battery-fed supplies |
| Output Voltage Range | 0.5V to 5.4V - digitally programmable with ±0.5% accuracy over temperature for precision point-of-load regulation |
| Switching Frequency | 250kHz to 1MHz - adjustable via resistor or PMBus; enables optimized efficiency/size trade-offs |
| Minimum On-Time | 45ns - allows high VIN/VOUT ratios (e.g., 12V→1.2V at 1MHz) without pulse-skipping instability |
| ADC/DAC Resolution | 16-bit ADC / 12-bit DAC - enables high-fidelity telemetry read-back and fine-grained closed-loop servo control |
| PMBus Compliance | Full PMBus v1.3 support - enables standardized telemetry, configuration, and fault reporting in multi-rail systems |
| AEC-Q100 Grade | Grade E (–40°C to 105°C) - qualified for automotive infotainment, ADAS domain controllers, and body electronics |
Pinout & Package
Package: 32-lead 5mm × 5mm plastic QFN with exposed thermal pad (Pin 33 = GND). RoHS-compliant, lead-free finish, tape-and-reel packaging (WTRPBF suffix denotes automotive-grade with controlled manufacturing).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Supplies gate drivers and internal circuitry; supports 4.5V–24V range with UVLO at 3.7V |
| TG / BG | Top/bottom N-MOSFET gate drivers | Integrated 1.5A peak drivers with 30ns/20ns rise/fall times and 10ns dead-time control |
| SW | Switch node | Connects to external power stage; rated for –5V to 28V transient swing |
| VSENSE+ / VSENSE– | Output voltage feedback | Differential sensing with 47kΩ input resistance; enables remote sensing and noise rejection |
| ISENSE+ / ISENSE– | Output current sense inputs | High-side DCR or shunt-based current measurement; supports auto-calibration |
| TSNS | External temperature sensor input | Accepts NTC thermistor; enables thermal derating and overtemperature shutdown |
| SCL / SDA | PMBus/I²C bidirectional interface | 400kHz max clock; open-drain with internal pull-ups; supports multi-device bus topology |
| ALERT / PGOOD | Fault signaling outputs | Open-drain status pins indicating rail faults or power-good assertion with programmable delay |
Key Features
| Feature | Design Value |
|---|---|
| Digital power system management | Real-time telemetry (VIN, IIN, VOUT, IOUT, temperature), fault logging with ECC, and PMBus-configurable sequencing/margining |
| Analog current-mode control | Stable, fast-transient response with slope compensation; compatible with DCR or shunt sensing and auto-calibration |
| PolyPhase® current sharing | Accurate load balancing across up to 6 phases using SHARE_CLK synchronization; eliminates external current-sharing ICs |
| Integrated power resources | On-chip 5V INTVCC regulator (LTC3883 variant), 3.3V/2.5V LDOs, and high-current MOSFET drivers reduce external component count |
| EEPROM with fault history | 10,000-cycle endurance, 10-year data retention; stores configuration, calibration data, and timestamped fault records |
Applications
| Telecom Power Shelf | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: High-density 48V-to-12V/5V/3.3V/1.8V conversion in centralized telecom power shelves with dynamic load demands. IC Role / Device Role / Timing Role: Primary phase controller managing multiple parallel LTC3883EUH#WTRPBF units via SHARE_CLK for coherent current sharing and synchronized switching. Use Value: Enables >90% efficiency at 20A loads while providing real-time telemetry for predictive maintenance and remote firmware updates via PMBus. |
Use Scenario: Powering vision processors, radar SoCs, and CAN/FlexRay interfaces in autonomous driving ECUs requiring AEC-Q100 compliance and fault resilience. IC Role / Device Role / Timing Role: Digital-configurable buck controller delivering tightly regulated 1.2V core and 1.8V I/O rails with programmable soft-start and voltage margining for functional safety validation. Use Value: Meets ASIL-B requirements through EEPROM-stored fault logs, overvoltage/undervoltage lockout, and thermal shutdown with external TSNS monitoring. |
| Industrial PLC Backplane | AI Accelerator Card |
Use Scenario: Distributed 24V-to-5V/3.3V conversion across modular I/O slots in programmable logic controllers with hot-swap capability. IC Role / Device Role / Timing Role: Independent rail controller per slot, using GPIO and ALERT for inter-slot fault propagation and coordinated power-up sequencing. Use Value: Eliminates need for discrete supervisors; enables per-rail current limiting, voltage ramp control, and telemetry-driven diagnostics during field deployment. |
Use Scenario: Multi-phase 12V-to-0.8V core supply for GPU/FPGA-based AI inference accelerators requiring sub-1% voltage tolerance and rapid transient response. IC Role / Device Role / Timing Role: Master controller in 4-phase configuration, leveraging minimum 45ns on-time and DCR auto-calibration to maintain regulation under 100A load steps. Use Value: Achieves <1% output deviation during 50A/µs transients while providing real-time IOUT telemetry for dynamic power capping and thermal throttling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883IUH#WTRPBF | Same functionality, extended temperature grade (–40°C to 125°C junction) | Required for under-hood automotive or high-ambient industrial environments | Select when operating junction temperature exceeds 105°C; otherwise identical pinout, code, and configuration |
| MP2960A-AEC1 | PMBus v1.3 compliant; 12-bit ADC only; no internal INTVCC regulator; requires external 5V bias | Lower integration level; suited for cost-sensitive designs where external bias is already available | Choose for simplified BOM in existing 5V-biased platforms; lacks LTC3883EUH#WTRPBF's auto-calibration and EEPROM fault logging depth |
Compared with LTC3883IUH#WTRPBF, the LTC3883EUH#WTRPBF offers identical feature set at lower temperature rating, reducing cost where 105°C suffices; versus MP2960A-AEC1, it delivers superior telemetry fidelity, autonomous bias generation, and deeper fault diagnostics - critical for high-reliability power systems.
Availability
LTC3883EUH#WTRPBF is available at Aetrix Electronics and suitable for telecom power shelves, automotive ADAS domain controllers, and industrial PLC backplanes requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for LTC3883EUH#WTRPBF 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 healthcare markets since 1965.
The LTC3883EUH#WTRPBF belongs to the Power by Linear™ digital power controller family, designed specifically for intelligent, telemetry-enabled DC/DC conversion in high-current, multi-rail systems demanding reliability, configurability, and automotive-grade robustness.
FAQ
What is the key difference between LTC3883EUH#WTRPBF and LTC3883-1 variants?
The LTC3883EUH#WTRPBF integrates an internal 5V linear regulator (INTVCC) for self-powered operation, whereas LTC3883-1 variants require an external 5V supply to minimize power loss. This makes LTC3883EUH#WTRPBF ideal for systems lacking a clean 5V rail, simplifying power tree design while maintaining full PMBus functionality and telemetry capability.
Does LTC3883EUH#WTRPBF support automatic inductor DCR calibration?
Yes, LTC3883EUH#WTRPBF performs automatic inductor DCR calibration during startup and periodically in operation. It measures DCR resistance and temperature coefficient to compensate for copper winding drift, ensuring accurate current sensing across –40°C to 105°C without manual calibration or external components - a core feature confirmed in the device's Applications Information section.
Can LTC3883EUH#WTRPBF be used in a single-phase configuration?
Yes, LTC3883EUH#WTRPBF operates fully in single-phase mode out-of-the-box. Its PolyPhase® capability is optional: when SHARE_CLK is left unconnected or configured as input, it defaults to standalone operation. All control loops, telemetry, and PMBus functions remain fully active - making it equally suitable for compact point-of-load or high-current multi-phase designs.
What fault telemetry does LTC3883EUH#WTRPBF provide via PMBus?
LTC3883EUH#WTRPBF provides real-time PMBus-read telemetry for input voltage (VIN), input current (IIN), output voltage (VOUT), output current (IOUT), internal die temperature, and external temperature (via TSNS). It also logs fault events - including OV/UV/OC, thermal, and timing faults - with timestamps and severity codes stored in on-chip EEPROM with ECC protection.
Is LTC3883EUH#WTRPBF pin-compatible with other members of the LTC3883 family?
Yes, LTC3883EUH#WTRPBF shares identical 32-pin QFN (5mm × 5mm) package and pinout with all LTC3883 and LTC3883-1 variants, including LTC3883IUH#WTRPBF and LTC3883EUH-1#WTRPBF. Differences are limited to temperature grade, internal vs. external bias, and marking - enabling drop-in replacement within same grade and variant group without PCB changes.
LTC3883EUH#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 32-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:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 24V
- Frequency - Switching:
- 250kHz ~ 1MHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- No
- Clock Sync:
- Yes
- Serial Interfaces:
- I2C, PMBus
- Control Features:
- Current Limit, Enable, Frequency Control, Phase Control, Power Good, Soft Start
- Operating Temperature:
- -40°C ~ 105°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
LTC3883EUH#WTRPBF FAQ
1.How can I place an order for LTC3883EUH#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3883EUH#WTRPBF 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 LTC3883EUH#WTRPBF reliable?
The price and inventory of LTC3883EUH#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3883EUH#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC3883EUH#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3883EUH#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3883EUH#WTRPBF?
LTC3883EUH#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3883EUH#WTRPBF 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 LTC3883EUH#WTRPBF?
For technical support, including LTC3883EUH#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3883EUH#WTRPBF requirements.
6.How does Aetrix verify that LTC3883EUH#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3883EUH#WTRPBF 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 LTC3883EUH#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC3883EUH#WTRPBF?
All LTC3883EUH#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3883EUH#WTRPBF, 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 LTC3883EUH#WTRPBF part is unused and in its original packaging.
Return procedure for LTC3883EUH#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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