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Analog Devices Inc. LTC3883IUH#TRPBF
- Part No.:
- LTC3883IUH#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC3883IUH#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,197
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Product details
Overview
LTC3883IUH#TRPBF 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, integrates 16-bit ADC/12-bit DAC, high-side current sense amplifier, EEPROM with ECC, and dual N-channel MOSFET gate drivers. It is used in high-current distributed power systems requiring telemetry, sequencing, and fault logging.
For engineers reviewing the LTC3883IUH#TRPBF datasheet, LTC3883IUH#TRPBF pinout, LTC3883IUH#TRPBF application, or LTC3883IUH#TRPBF equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed automotive-grade thermal range (–40°C to 125°C), and two rigorously cross-checked alternative controllers for digital power management applications.
Technical Context
The LTC3883IUH#TRPBF implements an analog current-mode control loop with programmable soft-start/stop, voltage/current margining, OV/UV/OC protection, and frequency synchronization from 250kHz to 1MHz. Its integrated high-side current sense amplifier enables precise DCR-based or resistor-based current sensing, with auto-calibration and accurate temperature compensation.
It features a constant-frequency PWM architecture supporting Burst Mode®, discontinuous conduction mode (DCM), and continuous conduction mode (CCM), plus PolyPhase® current sharing across up to six phases. The internal 5V linear regulator (INTVCC) powers internal circuitry, distinguishing it from the LTC3883-1 variant that requires external 5V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 24V - Supports wide-input industrial and automotive rails without external biasing. |
| VOUT Range | 0.5V to 5.4V - Covers core voltages for FPGAs, ASICs, and microprocessors with fine-grained digital adjustment. |
| Output Accuracy | ±0.5% over temperature - Enables tight regulation without external trimming in production systems. |
| Switching Frequency | 250kHz to 1MHz - Programmable via resistor or PMBus; allows optimization of size vs. efficiency for given load. |
| Min On-Time | 45ns - Enables high VIN/VOUT ratios (e.g., 12V→1V) with practical inductor values and stable operation. |
| ADC/DAC Resolution | 16-bit ADC / 12-bit DAC - Provides high-fidelity telemetry readback (VIN, IIN, VOUT, IOUT, temp) and precise closed-loop servo control. |
| Package | 32-lead 5mm × 5mm QFN - Exposed pad enhances thermal performance; compatible with standard reflow profiles. |
| Operating Temp | –40°C to 125°C junction - Qualified per AEC-Q100 Grade 1, suitable for under-hood and industrial environments. |
Pinout & Package
Package: 32-lead (5mm × 5mm) plastic QFN with exposed thermal pad (Pin 33 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply rail | Accepts 4.5V–24V; powers INTVCC regulator and gate drivers; must be decoupled near package. |
| TG / BG | Top/bottom gate drivers | Drive external N-channel MOSFETs; TG rise/fall time ≤30ns, BG ≤20ns; dead-time controlled internally. |
| SW | Switch node | Connects to MOSFET bridge midpoint; handles high dv/dt; requires low-inductance layout to minimize ringing. |
| VSENSE+ / VSENSE– | Output voltage feedback | Differential input for precision 0.5V–5.4V regulation; supports remote sensing and Kelvin connections. |
| ISENSE+ / ISENSE– | Output current sense | High-side differential input for DCR or shunt-based current measurement; supports auto-calibration. |
| SCL / SDA | PMBus/I²C interface | Standard 400kHz bidirectional bus; open-drain; supports multi-device addressing and telemetry polling. |
| ALERT / PGOOD | Fault signaling outputs | Open-drain status flags: ALERT asserts on any fault; PGOOD indicates regulated VOUT within tolerance. |
| TSNS | External temperature sensor input | Accepts NTC thermistor or diode-connected transistor; enables board-level thermal monitoring and shutdown. |
| RUN | Enable control input | Active-high logic input; includes 10µs digital filtering; controls startup sequence and soft-start initiation. |
| WP | EEPROM write protect | Hardware lock for on-chip EEPROM; prevents accidental configuration overwrite during field operation. |
Key Features
| Feature | Design Value |
|---|---|
| Digital Power System Management | Full PMBus v1.3 compliance enables real-time telemetry (VIN, IIN, VOUT, IOUT, die/board temp), fault logging, and remote configuration via LTPowerPlay GUI. |
| Auto-Calibrating Current Sensing | On-the-fly calibration of inductor DCR resistance compensates for copper temperature drift, eliminating manual offset tuning in production. |
| Integrated EEPROM with ECC | 10,000-cycle endurance and 10-year data retention at ≤125°C; stores configuration, fault history, and calibration coefficients with error correction. |
| PolyPhase® Current Sharing | Accurate interleaved phase balancing across up to 6 controllers using SHARE_CLK; reduces input/output ripple and improves transient response. |
| Three Operating Modes | Selectable Burst Mode® (ultra-low IQ), pulse-skipping (DCM), or forced CCM - optimizes efficiency across full load range without firmware changes. |
| AEC-Q100 Qualified | Qualified to Grade 1 (–40°C to +125°C) with full reliability testing - meets automotive functional safety requirements for power subsystems. |
Applications
| Server VR13 CPU Core Supply | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: High-current, dynamically scaled core voltage for multi-core SoCs with strict transient response and telemetry requirements. IC Role / Device Role / Timing Role: Primary digital step-down controller managing VDD_CPU with PMBus-synchronized sequencing, margining, and real-time current/voltage telemetry. Use Value: ±0.5% VOUT accuracy and 45ns min-on-time enable stable 0.8V/100A operation; EEPROM stores per-board calibration for production line traceability. |
Use Scenario: Power management for radar/Ethernet/SoC subsystems in autonomous driving ECUs operating under wide ambient temperature swings. IC Role / Device Role / Timing Role: AEC-Q100-qualified controller delivering 1.2V/30A and 3.3V/10A rails with fault logging, thermal shutdown, and diagnostic alert signaling. Use Value: –40°C to 125°C operation and internal overtemperature protection ensure reliability in engine bay mounting; TSNS input monitors heatsink temperature. |
| Telecom Base Station PSU | Industrial FPGA Power Rail |
Use Scenario: Distributed 48V-to-12V/5V conversion in modular telecom rectifiers requiring remote monitoring and predictive maintenance. IC Role / Device Role / Timing Role: Digital controller interfacing with system manager via PMBus; performs input/output telemetry, fault reporting, and synchronized soft-start across multiple modules. Use Value: Integrated 16-bit ADC enables <1% current measurement accuracy; fault logging captures overvoltage/overcurrent events for root-cause analysis. |
Use Scenario: Configurable, high-precision power for Xilinx/Intel FPGAs with dynamic voltage scaling and partial reconfiguration requirements. IC Role / Device Role / Timing Role: Dual-rail controller generating VCCINT (0.85V) and VCCAUX (1.8V); uses digital servo mode to maintain voltage within ±10mV during load transients. Use Value: 12-bit DAC and digital margining allow software-controlled voltage offsets for test modes; RCONFIG pins support hardware-programmed defaults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3884IUH#TRPBF | Higher VIN max (38V), added input current limit, enhanced PMBus command set, same 32-pin QFN package and pinout. | Better suited for 24V/36V industrial inputs; supports input OCP and more granular telemetry (e.g., duty cycle, phase current). | Select when higher input voltage range or input-side protection is required; drop-in replacement with minor firmware updates. |
| MP2960AGU-Z | Monolithic dual-phase controller (integrated MOSFETs), 4.5V–16V VIN, 0.3V–5.5V VOUT, PMBus v1.2, no internal EEPROM. | Reduces BOM count and layout area but lacks EEPROM storage, DCR auto-calibration, and AEC-Q100 qualification. | Choose for cost-sensitive, space-constrained designs where telemetry persistence and automotive qualification are not mandatory. |
Compared with LTC3884IUH#TRPBF, the LTC3883IUH#TRPBF offers lower VIN ceiling but superior thermal grade and EEPROM reliability for automotive use; versus MP2960AGU-Z, it trades integration for configurability, telemetry fidelity, and long-term field data retention.
Availability
LTC3883IUH#TRPBF is available at Aetrix Electronics and suitable for high-current distributed power systems, telecom base station PSUs, and automotive ADAS domain controllers requiring stable component supply, AEC-Q100 qualification, and digital power management capability.
Supply support for LTC3883IUH#TRPBF 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#TRPBF 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, reliability, and field-upgradable configuration.
FAQ
What is the maximum input voltage supported by the LTC3883IUH#TRPBF?
The LTC3883IUH#TRPBF supports a maximum input voltage of 24V under normal operation, with absolute maximum rating of 28V on the VIN pin. Operation above 24V risks violating the specified electrical characteristics and may trigger undervoltage lockout or damage if sustained. For 36V applications, consider the pin-compatible LTC3884IUH#TRPBF.
Does the LTC3883IUH#TRPBF include an internal voltage regulator?
Yes, the LTC3883IUH#TRPBF integrates an internal 5V linear regulator (INTVCC) capable of supplying up to 100mA, which powers internal circuitry and gate drivers. This distinguishes it from the LTC3883-1 variant, which requires an external 5V supply. The INTVCC regulator maintains ±2% load regulation from 0mA to 50mA.
How does the LTC3883IUH#TRPBF handle temperature monitoring and protection?
The LTC3883IUH#TRPBF provides dual temperature sensing: internal die temperature via dedicated circuitry (±1°C accuracy) and external board temperature via the TSNS pin (±3°C accuracy with NTC thermistor). It supports programmable overtemperature/undertemperature thresholds and can assert ALERT or shut down output via PGOOD deassertion upon fault detection.
Can the LTC3883IUH#TRPBF operate in single-phase mode?
Yes, the LTC3883IUH#TRPBF operates natively in single-phase mode and scales seamlessly to up to six phases using PolyPhase® current sharing. In single-phase configuration, it drives one high-side/low-side MOSFET pair via TG/BG pins, with SYNC and SHARE_CLK pins unused or tied off. No configuration change is needed to run in single-phase.
What EEPROM capabilities does the LTC3883IUH#TRPBF provide?
The LTC3883IUH#TRPBF includes on-chip EEPROM with ECC, rated for 10,000 write cycles and 10-year data retention at ≤125°C junction temperature. It stores user configuration (voltage, current limits, sequencing), calibration coefficients, and fault logs. Write protection is hardware-enforced via the WP pin to prevent unintended updates in deployed systems.
Is the LTC3883IUH#TRPBF pin-compatible with the LTC3883-1 variant?
No, the LTC3883IUH#TRPBF is not pin-compatible with LTC3883-1 variants. While both share the same 32-pin QFN package and most signal pins, the INTVCC pin on the LTC3883IUH#TRPBF is replaced by EXTVCC on the LTC3883-1, and the internal regulator topology differs. Board redesign is required to swap between them.
LTC3883IUH#TRPBF 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:
- -
- 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#TRPBF FAQ
1.How can I place an order for LTC3883IUH#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3883IUH#TRPBF 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#TRPBF reliable?
The price and inventory of LTC3883IUH#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3883IUH#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3883IUH#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3883IUH#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3883IUH#TRPBF?
LTC3883IUH#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3883IUH#TRPBF 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#TRPBF?
For technical support, including LTC3883IUH#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3883IUH#TRPBF requirements.
6.How does Aetrix verify that LTC3883IUH#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3883IUH#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3883IUH#TRPBF?
All LTC3883IUH#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3883IUH#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC3883IUH#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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