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Analog Devices Inc. LTC3883IUH#WTRPBF
- Part No.:
- LTC3883IUH#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC3883IUH#WTRPBF.pdf
- Description:
- 1X PHBUCK DC/DC CNTR W/ DIG PWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,380
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Product details
Overview
LTC3883IUH#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 distributed power systems for telecom and automotive applications.
For engineers reviewing the LTC3883IUH#WTRPBF datasheet, LTC3883IUH#WTRPBF pinout, LTC3883IUH#WTRPBF application, or LTC3883IUH#WTRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed AEC-Q100 qualification for automotive use, real-world sequencing/margining capabilities, and direct alternative part comparisons grounded in Analog Devices' official documentation.
Technical Context
The LTC3883IUH#WTRPBF implements an analog current-mode control loop with auto-calibration of inductor DCR and accurate PolyPhase® current sharing across up to six phases. Its internal 5V linear regulator (INTVCC) powers gate drivers and analog circuitry, eliminating need for external bias supply.
It features integrated high-side current sense amplifier, EEPROM with ECC and fault logging, programmable soft-start/stop, voltage/current margining, OV/UV/OC protection, and frequency synchronization from 250kHz to 1MHz. The device operates in Burst Mode®, discontinuous, or continuous conduction mode - configurable via PMBus or resistor programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 24V - supports wide-range industrial and automotive battery inputs without external regulators |
| 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 - synchronized externally or internally; minimum on-time 45ns enables high-VIN/low-VOUT conversion |
| Telemetry Resolution | VOUT readback: 16-bit ADC (244µV LSB); IOUT: up to 16-bit resolution with selectable gain for accurate load monitoring |
| Package & Temp Range | 32-lead 5mm × 5mm QFN; rated for –40°C to +125°C junction - qualified per AEC-Q100 Grade 1 |
| Digital Interface | PMBus v1.3 compliant (I²C-compatible), 10–400kHz clock; includes write-protect, alert, and GPIO for system-level fault coordination |
| Integrated Functions | 12-bit DAC, 16-bit ADC, internal EEPROM with ECC, fault logging, and integrated N-channel MOSFET gate drivers (TG/BG) |
Pinout & Package
32-lead (5mm × 5mm) plastic QFN package with exposed thermal pad (Pin 33 = GND). RoHS-compliant, lead-free finish. Designed for high-density PCB layouts with low-inductance power paths and thermal efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN_SNS | Input voltage sense input | High-impedance differential input for accurate VIN telemetry and UV/OV detection |
| IIN_SNS | Input current sense input | Differential input for measuring input current using shunt or DCR sensing |
| ISENSE+ | Output current sense positive | Connects to high-side of current-sense resistor or DCR network for IOUT telemetry |
| ISENSE– | Output current sense negative | Return path for ISENSE+; enables Kelvin connection for precision current measurement |
| TG | Top gate driver output | Drives high-side N-MOSFET gate; 30ns rise/fall time supports high-frequency switching |
| BG | Bottom gate driver output | Drives low-side N-MOSFET gate; 20ns rise/fall time with 10ns dead-time control |
| SW | Switch node | Connects to MOSFET switch node; rated for –5V to 28V transient swing |
| VSENSE+ | Output voltage sense positive | High-impedance input for feedback divider top node; enables remote sensing |
| VSENSE– | Output voltage sense negative | Feedback divider bottom node reference; supports differential VOUT monitoring |
| ITH | Error amplifier output | Internal transconductance amplifier output; sets peak inductor current limit |
| PGOOD | Power-good open-drain output | Asserts after VOUT reaches regulation window; configurable delay and fault response |
| ALERT | PMBus alert signal | Open-drain interrupt indicating fault, telemetry update, or command completion |
| SCL/SDA | PMBus serial interface | I²C-compatible bidirectional bus; supports multi-device addressing and hot-plug capability |
| WP | Write-protect input | Hardware lock for EEPROM writes; prevents accidental configuration changes in field operation |
| TSNS | External temperature sensor input | Analog input for NTC/PTC thermistor; enables thermal derating and overtemperature shutdown |
| RUN | Enable input | Active-high logic input controlling startup sequence and soft-start initiation |
| GPIO | General-purpose I/O | Configurable as input (fault monitor) or open-drain output (system status indicator) |
| SHARE_CLK | Phase synchronization clock | Outputs synchronized clock for multi-phase current sharing; supports up to 6-phase interleaving |
| SYNC | External sync input | Accepts external clock (250kHz–1MHz) to align switching edges across multiple controllers |
| VDD33/VDD25 | Internal LDO outputs | 3.3V/2.5V regulated supplies for external logic or level-shifting circuits |
| INTVCC | Internal 5V regulator output | On-chip LDO powering analog and gate-drive circuitry; 100mA max output current |
| BOOST | Bootstrap supply | Charges high-side gate driver capacitor; supports up to 34V boost-to-SW differential |
| PGND | Power ground | Separate ground return for high-current switching paths; minimizes noise coupling into analog sections |
| GND | Analog/digital ground | Reference for all analog and digital circuitry; tied to exposed thermal pad (Pin 33) |
Key Features
| Feature | Design Value |
|---|---|
| Digital Power System Management | Full PMBus v1.3 compliance enables real-time telemetry, configuration, and fault logging without host MCU firmware changes |
| Auto-Calibrating DCR Sensing | Eliminates manual calibration of inductor DCR drift with temperature - maintains <±1% current-sense accuracy across full temp range |
| AEC-Q100 Qualified | Rated for automotive Grade 1 (–40°C to +125°C) with production-tested EEPROM retention and fault-handling robustness |
| Integrated EEPROM with ECC | Stores configuration, fault logs, and calibration data; 10,000 write cycles and 10-year data retention at ≤125°C junction |
| Multi-Mode Light-Load Operation | Selectable Burst Mode®, pulse-skipping, or forced CCM - optimizes efficiency from 100µA to 20A load range |
| PolyPhase® Current Sharing | Accurate phase-to-phase current matching (<±1%) across up to 6 controllers using SHARE_CLK and SYNC signals |
Applications
| Telecom Base Station Power | Automotive ADAS ECU |
|---|---|
Use Scenario: High-efficiency, multi-rail power delivery for FPGA, DSP, and RF transceivers in 5G macro base stations. IC Role / Device Role / Timing Role: Primary step-down controller managing 12V input to 1.8V/3.3V/5V rails with precise sequencing and dynamic margining. Use Value: ±0.5% VOUT accuracy and real-time IOUT telemetry enable closed-loop thermal/power management under varying RF load conditions. |
Use Scenario: Distributed power architecture for camera, radar, and domain controller modules in autonomous driving systems. IC Role / Device Role / Timing Role: AEC-Q100-qualified controller delivering 1.0V core and 1.8V I/O rails with fault logging and startup sequencing per ISO 26262 ASIL-B requirements. Use Value: Internal EEPROM stores calibrated settings and fault history - critical for diagnostic traceability and functional safety audits. |
| Industrial PLC CPU Module | AI Accelerator Board |
Use Scenario: Compact, high-reliability power for ARM-based PLC CPUs operating in harsh factory environments. IC Role / Device Role / Timing Role: Single-phase controller with VIN supervision, temperature monitoring, and programmable soft-start to prevent inrush during cold start. Use Value: Integrated INTVCC LDO and 3.3V/2.5V auxiliary supplies reduce BOM count and improve layout simplicity in space-constrained modules. |
Use Scenario: Multi-phase power delivery for GPU/FPGA-based AI inference accelerators requiring tight voltage tolerance and dynamic current scaling. IC Role / Device Role / Timing Role: Master controller coordinating up to 6 phases via SHARE_CLK; manages current sharing and phase shedding under variable compute loads. Use Value: 45ns minimum on-time and 1MHz sync capability support high-frequency, low-duty-cycle operation needed for sub-1V AI core rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883-1IUH#WTRPBF | Uses external 5V EXTVCC instead of internal INTVCC; lower quiescent current; no integrated 5V LDO | Better suited for ultra-low-power systems where external 5V rail already exists and efficiency >75% at light load is critical | Select LTC3883-1 when minimizing standby power is prioritized and external 5V supply is available |
| LTC3887IUH#WTRPBF | Higher current capability (up to 80A per phase), enhanced DCR compensation, faster 1.5MHz max frequency, and improved transient response | Targeted at higher-power AI/ML accelerator boards and server VRMs requiring >40A per phase and tighter load-step regulation | Choose LTC3887 for designs needing >40A per phase, faster switching, or advanced adaptive DCR compensation |
Compared with LTC3883IUH#WTRPBF, the LTC3883-1IUH#WTRPBF reduces idle power by eliminating the INTVCC LDO but requires an external 5V source, while the LTC3887IUH#WTRPBF extends performance to higher currents and frequencies - making it suitable for next-generation AI power delivery where phase count and bandwidth are limiting factors.
Availability
LTC3883IUH#WTRPBF is available at Aetrix Electronics and suitable for telecom infrastructure, automotive ADAS modules, and industrial PLC CPU power systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-qualified reliability.
Supply support for LTC3883IUH#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 LTC3883IUH#WTRPBF belongs to the Power by Linear™ digital power controller family, designed specifically for intelligent, telemetry-enabled DC/DC conversion in mission-critical systems demanding precision, configurability, and automotive-grade robustness.
FAQ
What is the operating temperature range for the LTC3883IUH#WTRPBF?
The LTC3883IUH#WTRPBF is rated for a junction temperature range of –40°C to +125°C and is AEC-Q100 qualified for automotive Grade 1 applications. Its internal EEPROM is specified for 10-year data retention at ≤125°C junction temperature, and thermal protection triggers internal shutdown above TJ = 125°C. This makes the LTC3883IUH#WTRPBF suitable for under-hood automotive ECUs and industrial environments with wide ambient swings.
Does the LTC3883IUH#WTRPBF support multi-phase operation?
Yes, the LTC3883IUH#WTRPBF supports PolyPhase® operation for up to six phases using the SHARE_CLK and SYNC pins. It provides accurate current sharing (<±1%) between phases via dedicated clock distribution and phase-offset programming. The device can operate as master or slave, and its internal timing engine ensures deterministic interleaving - essential for reducing input/output ripple in high-current AI and telecom power systems.
How does the LTC3883IUH#WTRPBF handle output current sensing?
The LTC3883IUH#WTRPBF supports both high-side shunt resistor and inductor DCR sensing via dedicated ISENSE+ and ISENSE– inputs. It includes auto-calibration of DCR temperature coefficient and programmable gain (8×/4×/2×) for optimal resolution across load ranges. The 16-bit ADC delivers up to 125µV LSB resolution, enabling ±1% total unadjusted error for IOUT telemetry - critical for dynamic power budgeting and fault detection in real time.
Can the LTC3883IUH#WTRPBF be configured without a microcontroller?
Yes, the LTC3883IUH#WTRPBF supports resistor-based configuration via RCONFIG pins (FREQ_CFG, VOUT_CFG, ASEL, etc.) for setting switching frequency, output voltage, device address, and soft-start time - enabling full functionality without PMBus communication. However, advanced features like telemetry, margining, sequencing, and fault logging require the PMBus interface and LTPowerPlay™ GUI or host firmware integration.
What fault protection features are built into the LTC3883IUH#WTRPBF?
The LTC3883IUH#WTRPBF includes comprehensive fault protection: output overvoltage/undervoltage, peak overcurrent, input overvoltage, overtemperature (internal and external), input overcurrent, and output undercurrent. Each fault triggers configurable responses - such as PGOOD deassertion, ALERT assertion, latched shutdown, or soft recovery - with event logging stored in on-chip EEPROM. Fault thresholds are programmable via PMBus or resistors.
LTC3883IUH#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:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- I2C, PMBus
- Control Features:
- Enable, Frequency Control, Phase Control, Power Good
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
LTC3883IUH#WTRPBF FAQ
1.How can I place an order for LTC3883IUH#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3883IUH#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#WTRPBF reliable?
The price and inventory of LTC3883IUH#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#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC3883IUH#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3883IUH#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3883IUH#WTRPBF?
LTC3883IUH#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3883IUH#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#WTRPBF?
For technical support, including LTC3883IUH#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3883IUH#WTRPBF requirements.
6.How does Aetrix verify that LTC3883IUH#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3883IUH#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#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC3883IUH#WTRPBF?
All LTC3883IUH#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3883IUH#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#WTRPBF part is unused and in its original packaging.
Return procedure for LTC3883IUH#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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