My Inquiry
My Account
Analog Devices Inc. LTC3887EUJ-1
- Part No.:
- LTC3887EUJ-1
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC3887EUJ-1.pdf
- Description:
- IC POWER MANAGEMENT
- Quantity:
- Payment:
- Shipping:
Inventory:4,369
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3887EUJ-1 from Analog Devices is a dual-channel, current-mode synchronous step-down DC/DC controller with integrated power system management (PSM) via PMBus/SMBus/I²C. It supports 0.5V to 5.5V output per channel, 4.5V to 24V input, ±0.5% VOUT accuracy, and real-time telemetry of voltage, current, temperature, and faults-designed for high-reliability point-of-load power in telecom and server applications.
For engineers reviewing the LTC3887EUJ-1 datasheet, LTC3887EUJ-1 pinout, LTC3887EUJ-1 application, or LTC3887EUJ-1 equivalent, key selection criteria include its dual-output digital control capability, inferred input current sensing, DCR-based inductor current sensing, and support for autonomous sequencing and black-box fault logging without host firmware.
Technical Context
The LTC3887EUJ-1 implements a fixed-frequency, current-mode PWM architecture with programmable switching frequency (up to 1 MHz), adjustable soft-start, and independent loop compensation per channel. It integrates a 12-bit ADC for telemetry and uses EEPROM to retain configuration across power cycles.
It operates as a master PSM controller capable of cascading with slave devices like LTC3870, enabling coordinated sequencing and fault propagation across multiple rails. Its three-state PWM outputs support phase interleaving and enable precise margining and trimming of output voltages under digital command.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | Dual independent buck controllers, each supporting up to 30A with external MOSFETs |
| VOUT Range | 0.5V to 5.5V per channel-supports core, I/O, and auxiliary rail regulation |
| VIN Range | 4.5V to 24V-compatible with 5V, 12V, and 19V intermediate bus architectures |
| VOUT Accuracy | ±0.5% over line, load, and temperature-enables tight tolerance compliance for ASIC/FPGA supplies |
| Interface | PMBus v1.3 compliant over I²C/SMBus-supports standard commands including READ_VIN, READ_IOUT, PAGE, and STORE_DEFAULT_ALL |
| Telemetry | Real-time readback of VIN, VOUT, IOUT, temperature, duty cycle, and fault status via on-chip ADC |
| EEPROM | On-die nonvolatile memory stores full configuration-including margins, OV/UV thresholds, sequencing delays, and loop settings |
Pinout & Package
The LTC3887EUJ-1 is housed in a 6 mm × 6 mm, 40-pin QFN package with exposed thermal pad (EUJ suffix). Pin functions are validated per Analog Devices' official datasheet revision D (2017).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGOOD1, PGOOD2 | Open-drain power-good indicators | Assert low when respective VOUT is within ±7.5% of programmed value-used for downstream enable sequencing |
| CLKOUT | Programmable clock output | Provides synchronized timing reference for multi-phase or cascaded controllers |
| SCL, SDA | PMBus serial interface lines | Support hot-plug capable bidirectional communication at up to 400 kHz |
| TRIM1, TRIM2 | Analog trim inputs | Enable manual fine-tuning of VOUT offset (±10 mV range) alongside digital margining |
| ITH1, ITH2 | Error amplifier compensation pins | Accept RC networks to set bandwidth and phase margin per channel's analog control loop |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PSM channels | Enables simultaneous digital control and telemetry of two POL rails without external multiplexing or arbitration logic |
| Inferred input current sensing | Derives IIN from measured VOUT, IOUT, and efficiency model-eliminates need for input shunt resistor and associated power loss |
| Three-state PWM outputs | Supports phase shedding, interleaving, and seamless transition between active, skip, and sleep modes for light-load efficiency optimization |
| Autonomous fault response | Configurable retry, latch-off, or restart behavior on OV, UV, OC, OT, or communication timeout-no host intervention required |
| LTpowerPlay GUI integration | Full register-level configuration, real-time waveform capture, and black-box fault log export via free Windows software |
Applications
| Telecom Line Cards | Enterprise SSD Power |
|---|---|
Use Scenario: Regulating multiple voltage rails (1.8V, 3.3V, 12V) on high-density line cards with strict thermal and telemetry requirements. IC Role / Device Role / Timing Role: Dual-channel DC/DC controller with digital supervision-manages sequencing, monitors rail health, and logs faults during field deployment. Use Value: Reduces validation time by enabling remote calibration and post-deployment diagnostics via PMBus, avoiding costly site visits. | Use Scenario: Powering NVMe SSD controllers and NAND flash arrays where dynamic load steps demand fast transient response and accurate current reporting. IC Role / Device Role / Timing Role: Point-of-load controller with DCR-based current sensing and real-time IOUT telemetry-ensures safe operation during burst writes. Use Value: Enables host-side power budgeting and thermal throttling decisions using actual measured IOUT-not estimated values. |
| AI Accelerator Modules | Industrial PLC CPU Rails |
Use Scenario: Delivering tightly regulated 0.8V/50A and 1.2V/30A rails to GPU-like AI accelerators with dynamic voltage/frequency scaling (DVFS). IC Role / Device Role / Timing Role: Digital power controller supporting margining, trim, and programmable ramp rates-synchronized with accelerator firmware via PMBus. Use Value: Allows runtime VDD adjustment to match computational load, improving energy efficiency without hardware changes. | Use Scenario: Providing isolated, sequenced, and supervised 3.3V and 5V rails for PLC main CPUs and I/O interfaces in harsh industrial environments. IC Role / Device Role / Timing Role: Fault-resilient power manager with EEPROM-stored configuration-maintains known-good settings after brownouts or resets. Use Value: Eliminates need for external microcontroller-based supervision, reducing BOM count and firmware complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel digital DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3882-1 | Same 6×6 QFN-40 package and dual-channel architecture, but uses voltage-mode control and lacks three-state PWM outputs | Less suitable for phase-shedding or aggressive light-load efficiency optimization | Select LTC3882-1 when voltage-mode stability is preferred or when simpler loop compensation is desired |
| LTC3884-1 | Wider VIN range (4.5V–38V), supports higher input buses; shares same PSM feature set and pinout compatibility | Better suited for 24V/36V industrial or automotive intermediate bus systems | Choose LTC3884-1 when input voltage exceeds 24V or when extended bus tolerance is required |
Compared with LTC3887EUJ-1, LTC3882-1 offers simpler voltage-mode control but no three-state PWM, while LTC3884-1 extends input range to 38V with identical PSM functionality-making it ideal for higher-voltage industrial rails without redesigning layout or firmware.
Availability
LTC3887EUJ-1 is available at Aetrix Electronics and suitable for telecom infrastructure, enterprise storage, AI acceleration, and industrial control applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC3887EUJ-1 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, headquartered in Norwood, MA.
The LTC3887EUJ-1 belongs to Analog Devices' Power System Management (PSM) product line-designed specifically to replace analog supervisors and discrete sequencing ICs with digitally configurable, telemetry-enabled power controllers for complex multi-rail systems.
FAQ
What is the primary function of the LTC3887EUJ-1 in a power system?
The LTC3887EUJ-1 serves as a dual-channel, digitally managed synchronous buck controller that regulates two independent POL rails while providing real-time telemetry, autonomous fault management, and PMBus-configurable sequencing. Unlike basic controllers, the LTC3887EUJ-1 embeds EEPROM-stored configurations and supports black-box fault logging-enabling robust, maintenance-free operation in deployed systems.
Does the LTC3887EUJ-1 require external components for current sensing?
Yes-the LTC3887EUJ-1 supports DCR-based inductor current sensing using external RC networks on the IMONx pins, eliminating the need for lossy shunt resistors. It also provides inferred input current sensing derived from output measurements and efficiency modeling, reducing component count on the input side. No external sense resistor is required for either method.
Can the LTC3887EUJ-1 operate without a host processor or PMBus controller?
Yes-the LTC3887EUJ-1 operates autonomously after initial configuration. Its on-chip EEPROM retains all settings (voltage targets, margins, sequencing delays, fault responses), allowing full power-up, regulation, supervision, and fault handling without any active PMBus communication. Host interaction is optional for reconfiguration or telemetry readback.
What package type and thermal characteristics does the LTC3887EUJ-1 use?
The LTC3887EUJ-1 uses a 6 mm × 6 mm, 40-pin QFN package (EUJ) with an exposed thermal pad. Its θJA is 35°C/W (JEDEC High-K board), and it supports junction temperatures from –40°C to 125°C. The thermal pad must be soldered to a solid PCB copper plane for reliable operation at full rated current.
How does the LTC3887EUJ-1 handle power supply sequencing across multiple rails?
The LTC3887EUJ-1 supports both internal per-channel sequencing (via programmable ON_DELAY and TRACK pins) and inter-device cascading using the CTL pin and LTC3870 slaves. It can initiate, monitor, and halt sequencing based on PGOOD status, fault conditions, or PMBus commands-enabling deterministic, repeatable startup across complex multi-rail systems without external logic.
LTC3887EUJ-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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 FAQ
1.How can I place an order for LTC3887EUJ-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3887EUJ-1 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 reliable?
The price and inventory of LTC3887EUJ-1 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 is usually 5 days.
3.What payment methods are accepted for LTC3887EUJ-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3887EUJ-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3887EUJ-1?
LTC3887EUJ-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3887EUJ-1 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?
For technical support, including LTC3887EUJ-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3887EUJ-1 requirements.
6.How does Aetrix verify that LTC3887EUJ-1 is sourced from the original manufacturer or authorized distributors?
All LTC3887EUJ-1 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 meets industry standards.
7.What is the process for return or replacement of LTC3887EUJ-1?
All LTC3887EUJ-1 units undergo pre-shipment inspection (PSI). If there is an issue with LTC3887EUJ-1, 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 part is unused and in its original packaging.
Return procedure for LTC3887EUJ-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3887EUJ-1 Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
