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Analog Devices Inc. LTC3883EUH-1#WTRPBF
- Part No.:
- LTC3883EUH-1#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC3883EUH-1#WTRPBF.pdf
- Description:
- 1X PHBUCK DC/DC CNTR W/ DIG PWR
- Quantity:
- Payment:
- Shipping:
Inventory:4,686
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Product details
Overview
LTC3883EUH-1#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 0.5V–5.4V VOUT range, integrates 16-bit ADC and 12-bit DAC, and features internal EEPROM with ECC for fault logging-used in high-current telecom and industrial power supplies.
For engineers reviewing the LTC3883EUH-1#WTRPBF datasheet, LTC3883EUH-1#WTRPBF pinout, LTC3883EUH-1#WTRPBF application, or LTC3883EUH-1#WTRPBF equivalent, key selection criteria include its AEC-Q100 qualification, 45ns minimum on-time, analog current mode control loop, auto-calibration of inductor DCR, and support for up to 6-phase PolyPhase® current sharing.
Technical Context
The LTC3883EUH-1#WTRPBF implements a constant-frequency, analog current mode control architecture with integrated high-side current sense amplifier and programmable soft-start/stop, sequencing, margining, and OV/UV/OC protection. Its digital interface enables real-time telemetry read-back of VIN, IIN, VOUT, IOUT, and temperature via PMBus commands.
Unlike the LTC3883, the LTC3883-1 variant (including LTC3883EUH-1#WTRPBF) uses an external 5V supply for EXTVCC instead of an internal linear regulator, reducing power loss and enabling higher efficiency in low-input-voltage applications. It supports frequency synchronization from 250kHz to 1MHz and provides accurate polyphase current sharing across up to six phases.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 24V - supports wide-input industrial and automotive battery-fed systems |
| VOUT Range | 0.5V to 5.4V - covers core logic, FPGA, ASIC, and memory rail requirements |
| Output Accuracy | ±0.5% over temperature - ensures stable regulation under thermal stress without recalibration |
| Min On-Time | 45ns - enables high step-down ratios (e.g., 12V→1.0V at 1MHz) with practical inductor values |
| ADC/DAC Resolution | 16-bit ADC / 12-bit DAC - enables precise closed-loop digital servo control and telemetry quantization |
| EEPROM | On-chip EEPROM with ECC - stores configuration, fault logs, and calibration data with error correction |
| PMBus Compliance | Fully compliant with PMBus v1.3 - interoperable with standard digital power management tools and host controllers |
| Temp Range | –40°C to +105°C - qualified for extended industrial and automotive under-hood environments |
Pinout & Package
Package: 32-lead (5mm × 5mm) plastic QFN with exposed pad (Pin 33 = GND), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply | Accepts 4.5V–24V; powers internal circuitry and gate drivers via EXTVCC path (LTC3883-1) |
| TG / BG | Top/bottom gate drivers | Drives external N-channel MOSFETs; 30ns/20ns typical rise/fall times, 10ns dead-time control |
| SW | Switch node | Connects to MOSFET bridge midpoint; rated to –5V to 28V transient |
| VSENSE+ / VSENSE– | Output voltage feedback | Differential sensing for precision regulation; 47kΩ input resistance, ±500µV offset |
| ISENSE+ / ISENSE– | Output current sensing | High-side DCR or resistor-based current measurement; supports auto-calibration |
| SCL / SDA | PMBus/I²C interface | Open-drain, 400kHz max clock; supports multi-device bus with address pins (ASEL, VOUT_CFG) |
| ALERT / PGOOD | Fault signaling | Open-drain outputs indicating fault conditions or valid output regulation |
| WP | Write protect | Hardware lock for EEPROM writes; prevents accidental configuration changes in field operation |
Key Features
| Feature | Design Value |
|---|---|
| Digital power system management | Full PMBus v1.3 compliance enables remote monitoring, configuration, and fault logging via standard GUI tools like LTpowerPlay™ |
| Analog current mode control | Stable loop response with inherent cycle-by-cycle current limiting; eliminates need for external compensation components |
| Auto-calibrating DCR sensing | Compensates for inductor temperature drift in real time-no external thermistor or manual calibration required |
| PolyPhase® current sharing | Accurate load balancing across up to 6 phases using SHARE_CLK; <±3% phase current mismatch at full load |
| AEC-Q100 qualification | Qualified for automotive applications (Grade 2: –40°C to +105°C); includes enhanced ESD, latch-up, and HTOL testing |
| Three operating modes | Selectable Burst Mode®, pulse-skipping (DCM), or forced continuous conduction (CCM) for optimal light-load efficiency vs. ripple trade-off |
Applications
| Telecom Power Shelf | Industrial PLC CPU Rail |
|---|---|
|
Use Scenario: Distributed 48V-to-1.2V conversion in carrier-grade power shelves with dynamic load steps up to 50A/µs. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing single-phase or multiphase output with real-time telemetry and sequencing. Use Value: ±0.5% VOUT accuracy and 45ns min-on-time enable tight regulation margins at 1MHz switching, reducing output capacitance by >30% versus legacy controllers. |
Use Scenario: High-reliability 24V-to-3.3V/5V conversion for programmable logic controller main CPU and I/O banks in factory automation. IC Role / Device Role / Timing Role: Digitally managed power controller with EEPROM-stored startup sequence, margining, and fault logging for predictive maintenance. Use Value: Internal EEPROM with ECC retains configuration across power cycles and enables firmware-triggered reconfiguration without hardware change. |
| Automotive ADAS Domain Controller | AI Accelerator Board |
|
Use Scenario: Powering vision processor SoCs in autonomous driving ECUs requiring AEC-Q100 compliance and thermal derating awareness. IC Role / Device Role / Timing Role: AEC-Q100-qualified buck controller with external temperature sensing (TSNS) and overtemperature fault propagation. Use Value: Integrated temperature telemetry (±3°C external TUE) and fault logging allow runtime thermal profiling and failure root-cause analysis in safety-critical systems. |
Use Scenario: Multi-rail power delivery for PCIe-based AI accelerators with strict sequencing, voltage margining, and dynamic load response. IC Role / Device Role / Timing Role: Digital power manager coordinating VDD_CORE, VDD_MEM, and auxiliary rails via PMBus commands and GPIO-controlled sequencing. Use Value: Programmable soft-start/stop, voltage margining (±5%), and precise timing control (1ms resolution) ensure safe power-up/down of sensitive AI silicon. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883EUH#WTRPBF | Includes internal 5V INTVCC regulator; higher quiescent current than -1 version | Better suited for systems lacking clean 5V supply; less efficient at low VIN | Select when external 5V rail is unavailable or noisy |
| MP2960A from Monolithic Power Systems | PMBus v1.3 compliant, but lacks EEPROM with ECC and auto DCR calibration | Requires external microcontroller for fault logging; no built-in servo loop for voltage trimming | Choose for cost-sensitive designs where telemetry depth and autonomous calibration are secondary |
Compared with LTC3883EUH#WTRPBF, the LTC3883EUH-1#WTRPBF reduces power loss by eliminating the internal LDO, while MP2960A offers lower BOM cost but requires external firmware for full digital management capability.
Availability
LTC3883EUH-1#WTRPBF is available at Aetrix Electronics and suitable for telecom power shelves, industrial PLC CPU rails, automotive ADAS domain controllers, and AI accelerator boards requiring stable component supply, long-term lifecycle support, and AEC-Q100 assurance.
Supply support for LTC3883EUH-1#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.
The LTC3883EUH-1#WTRPBF belongs to Analog Devices' Power by Linear™ digital power controller family, designed specifically for intelligent, telemetry-rich, and highly configurable DC/DC conversion in mission-critical infrastructure and automotive systems.
FAQ
What is the key functional difference between LTC3883EUH-1#WTRPBF and LTC3883EUH#WTRPBF?
The LTC3883EUH-1#WTRPBF uses an external 5V supply for EXTVCC, eliminating the internal linear regulator found in the LTC3883EUH#WTRPBF. This reduces power loss and improves efficiency-especially at low input voltages-while requiring a clean external 5V rail. The LTC3883EUH-1#WTRPBF also has slightly different quiescent current behavior per datasheet Note 14.
Does LTC3883EUH-1#WTRPBF support PolyPhase® operation out of the box?
Yes, LTC3883EUH-1#WTRPBF natively supports PolyPhase® current sharing for up to 6 phases via the SHARE_CLK pin and synchronized PWM outputs. It achieves <±3% phase current mismatch under full load and supports automatic phase shedding and interleaving alignment through PMBus commands without external timing ICs.
Can LTC3883EUH-1#WTRPBF perform inductor DCR auto-calibration without external components?
Yes, LTC3883EUH-1#WTRPBF performs inductor DCR auto-calibration autonomously using its integrated current sense amplifier and ADC. No external thermistor or calibration resistor is needed-the device measures DCR at startup and during operation, then applies real-time temperature compensation based on TSNS input or internal die temperature.
What is the role of the WP pin on LTC3883EUH-1#WTRPBF?
The WP (Write Protect) pin on LTC3883EUH-1#WTRPBF is a hardware-level EEPROM lock. When pulled high, it disables all PMBus STORE commands-including STORE_DEFAULT_ALL and STORE_USER_ALL-preventing accidental or malicious configuration writes. This ensures firmware and fault log integrity in deployed systems.
Is LTC3883EUH-1#WTRPBF qualified for automotive use?
Yes, LTC3883EUH-1#WTRPBF carries the #W suffix indicating AEC-Q100 qualification (Grade 2: –40°C to +105°C). It undergoes rigorous automotive reliability testing including HTOL, ESD, and latch-up, and is approved for use in ADAS, infotainment, and body control modules where digital power telemetry and fault resilience are critical.
LTC3883EUH-1#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-1#WTRPBF FAQ
1.How can I place an order for LTC3883EUH-1#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3883EUH-1#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-1#WTRPBF reliable?
The price and inventory of LTC3883EUH-1#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-1#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC3883EUH-1#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3883EUH-1#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3883EUH-1#WTRPBF?
LTC3883EUH-1#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3883EUH-1#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-1#WTRPBF?
For technical support, including LTC3883EUH-1#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3883EUH-1#WTRPBF requirements.
6.How does Aetrix verify that LTC3883EUH-1#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3883EUH-1#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-1#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC3883EUH-1#WTRPBF?
All LTC3883EUH-1#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3883EUH-1#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-1#WTRPBF part is unused and in its original packaging.
Return procedure for LTC3883EUH-1#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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