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Analog Devices Inc. LTC3883IUH-1#WTRPBF
- Part No.:
- LTC3883IUH-1#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC3883IUH-1#WTRPBF.pdf
- Description:
- 1X PHBUCK DC/DC CNTR W/ DIG PWR
- Quantity:
- Payment:
- Shipping:
Inventory:4,483
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Product details
Overview
LTC3883IUH-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 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 industrial power supplies.
For engineers reviewing the LTC3883IUH-1#WTRPBF datasheet, LTC3883IUH-1#WTRPBF pinout, LTC3883IUH-1#WTRPBF application, or LTC3883IUH-1#WTRPBF equivalent, key selection criteria include its AEC-Q100 qualification for automotive use, 32-lead 5mm × 5mm QFN package, programmable soft-start/sequencing/margining, and integrated high-side current sense amplifier for DCR-based current sensing.
Technical Context
The LTC3883IUH-1#WTRPBF implements an analog current-mode control loop with digital supervision, supporting burst mode, pulse-skipping, or continuous conduction operation. Its internal EEPROM with ECC stores configuration and fault logs, while auto-calibration compensates for inductor DCR drift across temperature.
Unlike the LTC3883, the LTC3883-1 variant (including LTC3883IUH-1#WTRPBF) uses an external 5V supply for EXTVCC instead of an internal linear regulator, reducing power loss and enabling higher efficiency in thermally constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 24V - supports wide-input industrial and automotive battery-fed rails without external pre-regulation. |
| VOUT Range | 0.5V to 5.4V - digitally programmable via PMBus for precise core, I/O, or memory rail regulation. |
| Output Accuracy | ±0.5% over temperature - ensures stable voltage delivery under thermal stress in high-density systems. |
| Switching Frequency | 250kHz to 1MHz - adjustable via resistor or PMBus for optimal trade-off between size, efficiency, and EMI. |
| 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 - provides high-fidelity telemetry and fine-grained closed-loop servo control. |
| Package | 32-lead 5mm × 5mm QFN - exposes thermal pad for efficient heat dissipation in high-current (>20A) single-phase designs. |
Pinout & Package
Package: 32-lead (5mm × 5mm) plastic QFN with exposed thermal pad (Pin 33 = GND). RoHS-compliant, lead-free finish, rated for –40°C to +125°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input power supply | Accepts 4.5V–24V; powers internal circuitry and gate drivers via INTVCC (LTC3883) or EXTVCC (LTC3883-1). |
| TG / BG | Top/Bottom gate drivers | Drives external N-channel MOSFETs; TG rise/fall time ≤30ns, BG ≤20ns for fast switching. |
| SW | Switch node | Connects to MOSFET bridge midpoint; withstands up to 28V transient; requires low-inductance layout. |
| VSENSE+ / VSENSE– | Output voltage feedback | Differential input for precision 0.5V–5.4V regulation; 47kΩ input resistance minimizes divider loading. |
| ISENSE+ / ISENSE– | Output current sensing | High-side differential input for DCR or shunt-based current monitoring; supports auto-calibration. |
| SCL / SDA | PMBus/I²C interface | Standard 400kHz open-drain bus; supports address configuration and telemetry read-back. |
| ALERT / PGOOD | Fault signaling outputs | Open-drain status pins indicating fault conditions (OV/UV/OC/OT) or valid output regulation. |
| TSNS | External temperature sense | Accepts NTC thermistor or diode-connected transistor for board-level thermal monitoring. |
| RUN | Enable control input | Active-high logic input with 10µs digital filtering; initiates soft-start sequence on assertion. |
| WP | Write protect | Hardware lock for EEPROM writes; prevents accidental configuration changes during operation. |
Key Features
| Feature | Design Value |
|---|---|
| Digital power system management | Full PMBus v1.3 compliance enables remote configuration, telemetry, fault logging, and sequencing via LTPowerPlay GUI. |
| Auto-calibrating DCR current sensing | Eliminates manual calibration and compensates for copper temperature coefficient, improving current measurement accuracy over temperature. |
| Integrated EEPROM with ECC | Stores configuration, margining settings, and fault history with error correction; rated for 10,000 write cycles and 10-year data retention. |
| Accurate polyphase current sharing | Supports up to 6-phase interleaving with <±1% current mismatch, enabling scalable high-current solutions without external controllers. |
| AEC-Q100 qualified | Rated for automotive-grade reliability (Grade I: –40°C to +125°C), including HTOL, temperature cycling, and ESD testing per AEC standards. |
Applications
| Telecom Power Shelf | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: Distributed 12V-to-1.8V/20A conversion in 3U telecom shelf with hot-swap and redundancy. IC Role / Device Role / Timing Role: Primary step-down controller managing output voltage, current limit, sequencing, and telemetry via PMBus backplane. Use Value: ±0.5% VOUT accuracy and real-time IOUT/VIN telemetry enable predictive maintenance and dynamic load-line adjustment. |
Use Scenario: Powering SoC, GPU, and sensor fusion processors in autonomous driving ECUs with strict thermal and safety requirements. IC Role / Device Role / Timing Role: AEC-Q100-qualified controller delivering sequenced 1.0V/3.3V rails with overtemperature and overcurrent fault response. Use Value: Internal EEPROM fault logging and programmable OV/UV/OC thresholds support ISO 26262 ASIL-B functional safety diagnostics. |
| Industrial PLC CPU Module | High-Density Server VRM |
Use Scenario: Compact 24V-to-5V/3.3V/1.2V triple-output power stage on modular PLC CPU board with limited PCB area. IC Role / Device Role / Timing Role: Single-chip solution replacing multiple analog controllers; handles soft-start, margining, and voltage sequencing. Use Value: Digital margining (±5%) and programmable timing eliminate manual resistor adjustments and accelerate validation cycles. |
Use Scenario: High-efficiency 48V-to-0.8V VRM for AI accelerators requiring >400A total current with tight transient response. IC Role / Device Role / Timing Role: PolyPhase master controller coordinating up to six phases with accurate current sharing and telemetry aggregation. Use Value: 45ns minimum on-time and analog current-mode loop ensure sub-100ns transient recovery under 50A/µs load steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883IUH#WTRPBF | Includes internal 5V INTVCC regulator; higher quiescent current than LTC3883-1 variant. | Better suited for systems lacking clean 5V supply; less efficient in high-temperature environments. | Select when external 5V rail is unavailable or poorly regulated. |
| MP2960GQ-0000-Z | Monolithic 60A buck controller with integrated MOSFETs; no PMBus telemetry or EEPROM; 4.5V–16V VIN. | Targeted at cost-sensitive, space-constrained applications where digital management is not required. | Choose for simplified BOM and layout when telemetry and reconfiguration are unnecessary. |
Compared with LTC3883IUH#WTRPBF, the LTC3883IUH-1#WTRPBF reduces power loss by eliminating the internal LDO, while MP2960GQ-0000-Z trades configurability for integration and lower system cost - making LTC3883IUH-1#WTRPBF optimal for digitally managed, thermally demanding, high-reliability power systems.
Availability
LTC3883IUH-1#WTRPBF is available at Aetrix Electronics and suitable for telecom power shelves, automotive ADAS domain controllers, and industrial PLC CPU modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LTC3883IUH-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3883/LTC3883-1 product line was designed for digitally managed, high-efficiency DC/DC conversion in mission-critical systems - emphasizing telemetry fidelity, fault resilience, and automotive-grade reliability.
FAQ
What is the key functional difference between LTC3883IUH-1#WTRPBF and LTC3883IUH#WTRPBF?
The LTC3883IUH-1#WTRPBF uses an external 5V supply on the EXTVCC pin, eliminating the internal INTVCC linear regulator present in the LTC3883IUH#WTRPBF. This reduces power loss and improves thermal performance in high-temperature or high-efficiency applications, but requires a clean, well-regulated 5V source. The LTC3883IUH-1#WTRPBF retains identical PMBus functionality, pinout, and feature set otherwise.
Does LTC3883IUH-1#WTRPBF support polyphase operation, and how many phases can it manage?
Yes, LTC3883IUH-1#WTRPBF supports polyphase operation and can coordinate up to six synchronous buck phases using the SHARE_CLK pin for interleaved timing. It achieves accurate current sharing (<±1% mismatch) across phases via analog current-mode control and dedicated synchronization circuitry - critical for high-current server and AI accelerator VRMs.
What telemetry parameters can be read back from LTC3883IUH-1#WTRPBF via PMBus?
LTC3883IUH-1#WTRPBF supports real-time PMBus read-back of VIN, IIN, VOUT, IOUT, internal die temperature (TI), external temperature (T0/T1 via TSNS), and fault status registers. All telemetry is digitized by the integrated 16-bit ADC, with resolution down to 244µV for VOUT and 15.25µV for IOUT in high-gain ranges.
How does the auto-calibration feature work for inductor DCR current sensing in LTC3883IUH-1#WTRPBF?
LTC3883IUH-1#WTRPBF performs automatic DCR calibration during startup or on command by injecting a known current into the inductor and measuring the resulting voltage drop. It then computes and stores the DCR value and temperature coefficient in EEPROM, enabling real-time compensation for copper resistivity changes - improving current measurement accuracy across –40°C to +125°C.
Is LTC3883IUH-1#WTRPBF pin-compatible with other members of the LTC3883 family?
Yes, LTC3883IUH-1#WTRPBF is pin-compatible with all variants in the LTC3883/LTC3883-1 family, including LTC3883EUH-1#PBF and LTC3883IUH#WTRPBF. All share the same 32-lead 5mm × 5mm QFN package, identical pin functions, and mechanical footprint - enabling drop-in replacement where thermal or supply constraints permit.
LTC3883IUH-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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
LTC3883IUH-1#WTRPBF FAQ
1.How can I place an order for LTC3883IUH-1#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3883IUH-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 LTC3883IUH-1#WTRPBF reliable?
The price and inventory of LTC3883IUH-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 LTC3883IUH-1#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC3883IUH-1#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3883IUH-1#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3883IUH-1#WTRPBF?
LTC3883IUH-1#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3883IUH-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 LTC3883IUH-1#WTRPBF?
For technical support, including LTC3883IUH-1#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3883IUH-1#WTRPBF requirements.
6.How does Aetrix verify that LTC3883IUH-1#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3883IUH-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 LTC3883IUH-1#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC3883IUH-1#WTRPBF?
All LTC3883IUH-1#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3883IUH-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 LTC3883IUH-1#WTRPBF part is unused and in its original packaging.
Return procedure for LTC3883IUH-1#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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