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Analog Devices Inc. LTC3883EUH#TRPBF
- Part No.:
- LTC3883EUH#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC3883EUH#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,077
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Product details
Overview
LTC3883EUH#TRPBF from Analog Devices is a PMBus/I²C-compatible dual-output polyphase synchronous step-down DC/DC controller with digital power system management. It delivers ±0.5% output voltage accuracy, supports 4.5V–24V input and 0.5V–5.4V output, integrates 16-bit ADC/12-bit DAC, internal EEPROM with ECC, and high-side current sense amplifier for telecom and industrial power systems.
For engineers reviewing the LTC3883EUH#TRPBF datasheet, LTC3883EUH#TRPBF pinout, LTC3883EUH#TRPBF application, or LTC3883EUH#TRPBF equivalent, key selection criteria include its analog current-mode control loop, 45ns minimum on-time, auto-calibrating inductor DCR sensing, ±2°C temperature telemetry accuracy, and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The LTC3883EUH#TRPBF implements a constant-frequency, analog current-mode control architecture with integrated gate drivers for N-channel MOSFETs and supports up to six-phase PolyPhase® operation with accurate current sharing. Its digital interface enables real-time telemetry readback of VIN, IIN, VOUT, IOUT, and die/external temperature via PMBus commands.
It features an internal 5V linear regulator (INTVCC), programmable soft-start/stop, voltage/current margining, OV/UV/OC fault protection, and frequency synchronization from 250kHz to 1MHz. EEPROM stores configuration, fault logs, and calibration data with error-correcting code (ECC) for robust field updates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 24V - supports wide-input industrial and automotive battery-fed rails |
| VOUT Range | 0.5V to 5.4V - covers core logic, memory, FPGA, and ASIC supply requirements |
| Output Accuracy | ±0.5% over temperature - ensures stable regulation under thermal stress without external trimming |
| 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 precise telemetry and closed-loop digital servo control |
| EEPROM Retention | 10 years at TJ ≤ 125°C - guarantees long-term configuration persistence in embedded systems |
| PMBus Compliance | Full SMBus v2.0/PMBus v1.3 support - enables interoperability with industry-standard power management tools |
Pinout & Package
Package: 32-lead (5mm × 5mm) plastic QFN with exposed thermal pad (Pin 33 = GND). RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN_SNS | Input voltage sense input | High-impedance differential input for accurate VIN telemetry and UV/OV detection |
| ISENSE+ | Current sense positive input | Accepts DCR or shunt-based current sensing; supports auto-calibration |
| ISENSE− | Current sense negative input | Differential pair with ISENSE+; rejects common-mode noise in high-dI/dt environments |
| TG / BG | Top/bottom gate drivers | Integrated 1.5A peak N-MOSFET drivers with 30ns/20ns transition times and dead-time control |
| SW | Switch node | Connects to external power stage; rated for −5V to 28V transient swing |
| VSENSE+ | Output voltage sense positive | High-precision feedback path; 47kΩ input resistance minimizes divider loading error |
| VSENSE− | Output voltage sense negative | Return reference for VOUT regulation; supports remote sensing for improved load regulation |
| ITH | Error amplifier output | Analog compensation node; allows external Type II/III compensation network |
| SYNC | Frequency synchronization input | Accepts external clock (250kHz–1MHz) to phase-lock multiple controllers |
| SHARE_CLK | PolyPhase current-sharing clock | Enables accurate multi-phase interleaving and current balancing across up to 6 phases |
| SCL / SDA | PMBus serial interface | Open-drain I²C-compatible bus supporting 10–400kHz; includes digital filtering and timeout protection |
| ALERT | Fault indicator output | Open-drain active-low signal asserting on any detected fault (OV, UV, OC, OT, etc.) |
| PGOOD | Power-good status | Open-drain output indicating regulated VOUT within ±7.5% window after soft-start completion |
| RUN | Enable control input | Active-high logic input with 10µs digital filter; controls startup sequencing and shutdown |
| GPIO | General-purpose I/O | Configurable as input or open-drain output; supports custom fault response or status signaling |
| TSNS | External temperature sensor input | Accepts NTC thermistor or diode-connected transistor; supports ±3°C accuracy with calibration |
| WP | Write-protect enable | Hardware lock for EEPROM writes; prevents accidental configuration corruption during operation |
| VDD33 / VDD25 | Internal LDO outputs | 3.3V/2.5V regulated supplies for external circuitry; each includes overvoltage/undervoltage protection |
| INTVCC | Internal 5V regulator output | On-chip LDO powers internal circuitry; delivers 100mA peak current with ±2% load regulation |
| BOOST | Bootstrap supply for top gate | Charges external bootstrap capacitor; supports up to 34V (BOOST–SW) differential rating |
| PGND | Power ground | Separate low-impedance return path for high-current switching nodes |
| GND | Analog/digital ground | Reference for sensitive analog circuits; tied to exposed thermal pad for thermal and EMI performance |
Key Features
| Feature | Design Value |
|---|---|
| Digital Power System Management | Real-time telemetry (VIN, IIN, VOUT, IOUT, temperature) and configurable fault responses via PMBus |
| Auto-Calibrating DCR Sensing | Eliminates manual calibration; compensates for inductor DCR drift over temperature and aging |
| Accurate PolyPhase® Current Sharing | Enables scalable high-current designs up to 6 phases with <±3% current imbalance |
| Internal EEPROM with ECC | Stores configuration, fault logs, and calibration data; ECC prevents silent corruption in harsh environments |
| Three Operating Modes | Selectable Burst Mode®, discontinuous (pulse-skipping), or continuous conduction for optimal light-load efficiency |
| AEC-Q100 Qualified | Rated for −40°C to 105°C junction temperature; qualified per automotive reliability standards |
Applications
| Telecom Base Station Power | Industrial PLC CPU Core Supply |
|---|---|
Use Scenario: High-density 48V intermediate bus conversion to 1.2V/60A for FPGA and DSP processors in 5G radio units. IC Role / Device Role / Timing Role: Primary step-down controller managing dynamic load transients, phase shedding, and telemetry reporting to baseband controller. Use Value: 45ns min-on-time enables 1MHz switching at 40:1 step-down ratio; ±0.5% VOUT accuracy maintains timing margins under thermal cycling. | Use Scenario: Programmable logic controller with dual-core ARM Cortex-A9 requiring tightly regulated 1.0V/25A and 3.3V/5A rails. IC Role / Device Role / Timing Role: Dual-output digital controller executing voltage sequencing, margining, and fault logging for functional safety compliance. Use Value: Internal EEPROM retains calibrated settings across power cycles; PMBus interface enables remote diagnostics and firmware updates. |
| Automotive ADAS Domain Controller | AI Accelerator Board Power |
Use Scenario: Power delivery for vision-processing SoC (e.g., NVIDIA Orin) in autonomous driving ECUs operating at −40°C to 105°C ambient. IC Role / Device Role / Timing Role: AEC-Q100-qualified controller performing synchronized multi-rail startup, overtemperature shutdown, and CAN-bridge telemetry forwarding. Use Value: Integrated temperature sensors and ±2°C accuracy enable predictive thermal throttling; fault logging supports ISO 26262 diagnostic coverage. | Use Scenario: High-performance AI training board requiring 0.8V/120A GPU core rail with dynamic voltage/frequency scaling (DVFS). IC Role / Device Role / Timing Role: PolyPhase master controller coordinating 4-phase operation, current sharing, and real-time IOUT telemetry for closed-loop DVFS control. Use Value: 16-bit ADC provides 244µV LSB resolution on VOUT readback; 10-bit IOUT resolution enables precise current limiting at 120A full scale. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3884IUH#TRPBF | Higher VIN max (38V), adds VIN telemetry, same pinout and firmware compatibility | Better suited for 24V/36V industrial or PoE++ systems requiring extended input range | Select when input exceeds 24V or VIN telemetry is required; drop-in replacement with no layout change |
| MP8770GQ-Z | No PMBus interface; analog-only control with fixed 600kHz fSW; lower integration (no EEPROM, no ADC) | Cost-sensitive applications where digital telemetry and configurability are not required | Choose for simpler, lower-BOM-cost designs lacking system-level power management needs |
Compared with LTC3884IUH#TRPBF, the LTC3883EUH#TRPBF offers identical digital feature set at lower VIN rating, while MP8770GQ-Z trades telemetry and flexibility for cost and simplicity-making LTC3883EUH#TRPBF optimal for mid-range digitally managed power where 24V input suffices.
Availability
LTC3883EUH#TRPBF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and automotive ADAS applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-qualified reliability.
Supply support for LTC3883EUH#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 LTC3883EUH#TRPBF belongs to the Power by Linear™ digital power controller family, designed specifically for high-efficiency, digitally managed point-of-load (POL) conversion in demanding embedded and mission-critical systems.
FAQ
What is the primary function of the LTC3883EUH#TRPBF in a power system?
The LTC3883EUH#TRPBF is a digitally managed, dual-output synchronous step-down DC/DC controller that regulates voltage, monitors telemetry (VIN, VOUT, IOUT, temperature), executes fault responses, and stores configuration in on-chip EEPROM. Its core function is to replace analog controllers with full PMBus-based system-level power management, enabling remote configuration, diagnostics, and adaptive control in the LTC3883EUH#TRPBF-based design.
Does the LTC3883EUH#TRPBF require external components for basic operation?
Yes - the LTC3883EUH#TRPBF requires external power MOSFETs, inductors, input/output capacitors, and feedback resistors for VOUT setting. It also needs a bootstrap capacitor for the TG driver and optional external thermistor for TSNS. However, it integrates gate drivers, INTVCC regulator, VDD33/VDD25 LDOs, ADC/DAC, EEPROM, and current sense amplifier - eliminating most discrete support components needed by legacy controllers.
How does the LTC3883EUH#TRPBF achieve ±0.5% output voltage accuracy?
The LTC3883EUH#TRPBF achieves ±0.5% output voltage accuracy through a combination of precision internal references, 16-bit ADC-based auto-zeroing of the feedback loop, and closed-loop digital servo correction. This accuracy is specified over temperature and line/load conditions and is maintained without external trimming - verified in the LTC3883EUH#TRPBF's electrical characteristics table under VOUTR0/VOUTR1 set-point accuracy.
Can the LTC3883EUH#TRPBF operate in single-phase mode?
Yes - the LTC3883EUH#TRPBF operates natively in single-phase mode and can be configured for multi-phase (up to 6-phase) operation using the SHARE_CLK pin and external synchronization. Its analog current-mode architecture and integrated current sense amplifier support both configurations without hardware changes; phase count is set via PMBus command or RCONFIG pins, making the LTC3883EUH#TRPBF flexible for scalable power designs.
Is the LTC3883EUH#TRPBF pin-compatible with the LTC3883-1 variant?
No - the LTC3883EUH#TRPBF (LTC3883) and LTC3883EUH-1#TRPBF (LTC3883-1) share the same 32-pin QFN package and pinout but differ in internal regulation: the LTC3883EUH#TRPBF includes an internal 5V INTVCC regulator, while the LTC3883-1 requires an external 5V supply. This difference affects VIN biasing and quiescent current, so direct substitution requires verifying power tree compatibility in the target design using the LTC3883EUH#TRPBF datasheet.
LTC3883EUH#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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
LTC3883EUH#TRPBF FAQ
1.How can I place an order for LTC3883EUH#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3883EUH#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 LTC3883EUH#TRPBF reliable?
The price and inventory of LTC3883EUH#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3883EUH#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3883EUH#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3883EUH#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3883EUH#TRPBF?
LTC3883EUH#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3883EUH#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 LTC3883EUH#TRPBF?
For technical support, including LTC3883EUH#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3883EUH#TRPBF requirements.
6.How does Aetrix verify that LTC3883EUH#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3883EUH#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 LTC3883EUH#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3883EUH#TRPBF?
All LTC3883EUH#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3883EUH#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 LTC3883EUH#TRPBF part is unused and in its original packaging.
Return procedure for LTC3883EUH#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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