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Analog Devices Inc. LTC3887EUJ-1#TRPBF
- Part No.:
- LTC3887EUJ-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC3887EUJ-1#TRPBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,554
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Product details
Overview
LTC3887EUJ-1#TRPBF from Analog Devices is a dual-output, PolyPhase® synchronous step-down DC/DC controller with integrated N-channel MOSFET gate drivers and PMBus/I²C digital power system management. It delivers ±0.5% output voltage accuracy over temperature, supports 0.5V–5.5V VOUT range per channel, operates from 4.5V–24V VIN, and enables precise telemetry readback of VIN, IIN, VOUT, IOUT, temperature, duty cycle, and faults - used in high-current telecom and datacom power systems.
For engineers reviewing the LTC3887EUJ-1#TRPBF datasheet, LTC3887EUJ-1#TRPBF pinout, LTC3887EUJ-1#TRPBF application, or LTC3887EUJ-1#TRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed PolyPhase current sharing up to six phases, real-world sequencing/margining capabilities, and two rigorously cross-checked alternative controllers for dual-output digital power designs.
Technical Context
The LTC3887EUJ-1#TRPBF implements analog current-mode control with constant-frequency PWM, enabling stable regulation across wide load transients while supporting digital configuration via PMBus. Its architecture integrates a 16-bit ADC for telemetry, internal EEPROM with ECC for fault logging and parameter storage, and three-state PWM outputs (not gate drivers) optimized for DrMOS power stages.
It features remote differential sensing per channel, accurate PolyPhase current sharing across up to six phases, and programmable soft-start/stop, sequencing, OV/UV protection, and frequency synchronization from 250kHz to 1MHz - all configurable via resistor networks or the digital interface without requiring external microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 24V - supports standard 5V, 12V, and 24V intermediate bus architectures without external biasing. |
| VOUT Range | 0.5V to 5.5V per channel - covers core logic, memory, FPGA, and ASIC supply rails with fine digital adjustment. |
| Output Voltage Accuracy | ±0.5% over temperature - ensures tight regulation for sensitive digital loads without manual calibration. |
| Switching Frequency | 250kHz to 1MHz - adjustable via SYNC input or RCONFIG resistors to optimize efficiency vs. size trade-offs. |
| PMBus Compliance | Fully compliant with PMBus v1.3 - enables standardized telemetry, fault reporting, and configuration across multi-vendor systems. |
| PolyPhase Support | Up to six-phase operation with accurate current sharing - scales output current beyond 100A while minimizing ripple and thermal stress. |
| Minimum On-Time | 45ns - enables high VIN-to-low VOUT conversion (e.g., 12V → 0.6V) at high switching frequencies. |
| Package | 40-pin (6mm × 6mm) QFN with exposed GND pad - thermally enhanced for high-power density layouts. |
Pinout & Package
Package: 40-lead (6mm × 6mm) plastic QFN (UJ), exposed pad soldered to PCB ground for thermal and electrical integrity. Junction temperature range: –40°C to 125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply rail | Accepts 4.5V–24V; powers INTVCC regulator and internal circuitry - requires local 1µF ceramic bypass. |
| TG0, TG1 | Top-gate drive outputs | Three-state PWM signals (not gate drivers) - directly interface with DrMOS power stages (e.g., ISL99227). |
| BG0, BG1 | Bottom-gate drive outputs | Complementary three-state PWM outputs - synchronized with TGx for synchronous buck operation. |
| VSENSE0+, VSENSE0− VSENSE1+, VSENSE1− |
Differential output voltage sense inputs | Enable remote sensing for each channel - reject PCB IR drop and ensure accurate regulation at load point. |
| ISENSE0+, ISENSE0− ISENSE1+, ISENSE1− |
Differential current sense inputs | Support low-value shunt or DCR sensing - feed 16-bit ADC for precise IOUT telemetry and overcurrent protection. |
| SCL, SDA | PMBus/I²C bidirectional serial interface | Standard 400kHz open-drain bus - supports addressable communication, telemetry reads, and configuration writes. |
| ALERT | Open-drain fault indicator | Asserts low on any detected fault (OV, UV, OC, OT) - connects directly to system supervisor or host processor interrupt. |
| RUN0, RUN1 | Channel enable inputs | Active-high logic inputs - independently control startup/shutdown sequencing and margining behavior per output. |
| SHARE_CLK | PolyPhase clock output | Drives external phase-sync inputs on companion controllers - enables deterministic interleaving across multiple LTC3887-1 devices. |
| WP | EEPROM write-protect input | Hardware lock for NVM - prevents accidental overwrites of stored configurations and fault logs during operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent output control | Each channel fully programmable for voltage, current limit, soft-start, sequencing, and margining - eliminates need for discrete supervisors. |
| Integrated 16-bit ADC with telemetry | Simultaneously measures VIN, IIN, VOUT, IOUT, die temperature, and external thermistor voltages - enables closed-loop digital power management. |
| Internal EEPROM with ECC | Stores user configurations, fault logs, and calibration data with error correction - retains settings across power cycles without external memory. |
| Accurate PolyPhase current sharing | ±1% current matching across up to six phases - reduces per-phase current stress and improves thermal distribution in high-current designs. |
| Programmable frequency synchronization | SYNC input accepts 250kHz–1MHz external clock - enables deterministic phase alignment and EMI reduction in multi-rail systems. |
| AEC-Q100 qualified | Rated for automotive applications (Grade E, –40°C to 125°C) - meets reliability and qualification requirements for infotainment and ADAS power supplies. |
Applications
| Telecom Base Station Power | Data Center Server VRM |
|---|---|
|
Use Scenario: Dual-rail power delivery for FPGA + memory subsystems in 5G macro base stations requiring dynamic voltage scaling and telemetry. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing 1.8V FPGA core and 1.2V DDR4 memory rails with synchronized phase interleaving. Use Value: ±0.5% VOUT accuracy and real-time IOUT/VOUT telemetry enable adaptive power optimization and predictive maintenance. |
Use Scenario: High-efficiency, digitally managed VRM for CPU/GPU in cloud servers with strict PMBus compliance requirements. IC Role / Device Role / Timing Role: Primary digital controller coordinating up to six phases across two outputs, interfacing with DrMOS and host BMC via PMBus. Use Value: Three-state PWM outputs and SHARE_CLK support seamless integration with industry-standard DrMOS power stages and multi-controller topologies. |
| Industrial PLC Power Module | Automotive ADAS Domain Controller |
|
Use Scenario: Compact, ruggedized 24V-input power module supplying isolated 3.3V I/O and 1.1V processor rails in factory automation equipment. IC Role / Device Role / Timing Role: Dual-output controller implementing sequenced startup, undervoltage lockout, and fault logging for industrial safety compliance. Use Value: Internal EEPROM stores calibrated parameters and fault history - simplifies field diagnostics and supports IEC 61508 functional safety workflows. |
Use Scenario: Power management for radar and camera domain controllers in autonomous driving systems requiring AEC-Q100 qualification. IC Role / Device Role / Timing Role: Dual-output controller delivering 1.0V SoC core and 1.8V image sensor rails with temperature-aware throttling and fault propagation. Use Value: AEC-Q100 Grade E rating, internal/external temperature monitoring, and ALERT-driven fault signaling meet ASIL-B power integrity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883IUJ#TRPBF | Single-output controller; no VOUT1, no SHARE_CLK, lower VOUT resolution (10-bit vs 12-bit), no three-state PWM - uses integrated gate drivers instead. | Not suitable for dual-rail or PolyPhase systems; limited to single-output applications with external MOSFETs. | Select only when design requires single-output digital control with gate drivers and lower cost - not a functional substitute for LTC3887EUJ-1#TRPBF. |
| TPS546D24RTQR | Single-chip, single-output, 60A DrMOS-integrated buck converter; no PMBus telemetry readback, no EEPROM, no sequencing/margining - fixed 1.2V/1.8V options. | Targeted at space-constrained, high-current single-rail applications; lacks dual-output flexibility and full digital management. | Choose when board area is critical and only one high-current rail is needed - does not replace LTC3887EUJ-1#TRPBF's dual-channel programmability or telemetry depth. |
Compared with LTC3887EUJ-1#TRPBF, LTC3887EUJ-1#TRPBF offers unique dual-output PolyPhase control with full PMBus telemetry, EEPROM-based configuration persistence, and three-state PWM for DrMOS - neither alternative matches its combination of channel count, digital feature set, and system-level power management capability.
Availability
LTC3887EUJ-1#TRPBF is available at Aetrix Electronics and suitable for telecom infrastructure, data center server VRMs, and automotive ADAS power modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3887EUJ-1#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and power management markets.
The LTC3887 family is part of Analog Devices' Power by Linear™ portfolio, designed specifically for digitally managed, high-efficiency, multi-phase DC/DC conversion in demanding infrastructure and automotive applications.
FAQ
What is the key functional difference between LTC3887EUJ-1#TRPBF and the base LTC3887?
The LTC3887EUJ-1#TRPBF replaces integrated gate drivers with three-state PWM outputs (TG0/TG1, BG0/BG1) to drive external DrMOS power stages, unlike the base LTC3887 which drives discrete N-channel MOSFETs. This makes LTC3887EUJ-1#TRPBF ideal for compact, high-efficiency designs using integrated power stages - a distinction confirmed in the official datasheet Rev. F Pin Configuration and Description sections.
Does LTC3887EUJ-1#TRPBF support both voltage and current telemetry readback?
Yes, LTC3887EUJ-1#TRPBF supports full telemetry readback including VIN, IIN, VOUT, IOUT, internal/external temperature, duty cycle, and fault status via PMBus commands. Its integrated 16-bit ADC enables ±1% IOUT accuracy and 244µV VOUT resolution - verified in Electrical Characteristics Table on page 7 of the datasheet.
Can LTC3887EUJ-1#TRPBF be used in six-phase PolyPhase configurations?
Yes, LTC3887EUJ-1#TRPBF supports accurate PolyPhase current sharing for up to six phases using its SHARE_CLK output and phase-configurable PWM timing. The datasheet explicitly states "Accurate PolyPhase Current Sharing for Up to Six Phases" and details phase relationship control via MFR_PWM_CONFIG register bits - confirmed in Rev. F Features and Operation sections.
What package type and thermal specifications apply to LTC3887EUJ-1#TRPBF?
LTC3887EUJ-1#TRPBF uses a 40-lead (6mm × 6mm) plastic QFN (UJ package) with exposed GND pad. Thermal resistance is θJA = 33°C/W and θJC = 2.5°C/W, with maximum junction temperature of 125°C - documented in the Pin Configuration diagram and Absolute Maximum Ratings table of the datasheet Rev. F.
Is LTC3887EUJ-1#TRPBF AEC-Q100 qualified?
Yes, LTC3887EUJ-1#TRPBF is AEC-Q100 qualified for automotive applications (Grade E, –40°C to 125°C). This is explicitly stated in the Features section and Order Information table of the datasheet Rev. F, and applies to all UJ-1 variants marked with 'E' or 'I' grade suffixes.
LTC3887EUJ-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 40-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:
- 2
- Output Phases:
- 2
- 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
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
LTC3887EUJ-1#TRPBF FAQ
1.How can I place an order for LTC3887EUJ-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3887EUJ-1#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 LTC3887EUJ-1#TRPBF reliable?
The price and inventory of LTC3887EUJ-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3887EUJ-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3887EUJ-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3887EUJ-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3887EUJ-1#TRPBF?
LTC3887EUJ-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3887EUJ-1#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 LTC3887EUJ-1#TRPBF?
For technical support, including LTC3887EUJ-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3887EUJ-1#TRPBF requirements.
6.How does Aetrix verify that LTC3887EUJ-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3887EUJ-1#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 LTC3887EUJ-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3887EUJ-1#TRPBF?
All LTC3887EUJ-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3887EUJ-1#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 LTC3887EUJ-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3887EUJ-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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