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Analog Devices Inc. LTC3888IUHG#TRPBF
- Part No.:
- LTC3888IUHG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 52-WFQFN Exposed Pad
- Datasheet:
-
LTC3888IUHG#TRPBF.pdf
- Description:
- DUAL OUTPUT 8-PHASE STEP-DOWN DC
- Quantity:
- Payment:
- Shipping:
Inventory:3,788
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Product details
Overview
LTC3888IUHG#TRPBF from Analog Devices is a dual-loop, 8-phase digital power system management (PSM) DC/DC step-down controller supporting up to 16 phases via expansion. It delivers ±0.5% output voltage accuracy across 0.3 V–3.45 V, operates from 4.5 V–26.5 V input, and integrates PMBus/I²C interface, internal EEPROM with ECC, and DrMOS monitoring interfaces for high-current server and networking power rails.
For engineers reviewing the LTC3888IUHG#TRPBF datasheet, LTC3888IUHG#TRPBF pinout, LTC3888IUHG#TRPBF application, or LTC3888IUHG#TRPBF equivalent, key selection criteria include its dual-loop architecture, 52-pin QFN package, AEC-Q100 qualification, programmable PWM loop compensation, and support for DrMOS temperature/fault bus and gate drive supply monitoring in multi-phase synchronous buck designs.
Technical Context
The LTC3888IUHG#TRPBF implements constant-frequency current-mode control with two independent main loops, each managing four PWM outputs (total eight phases), enabling precise polyphase current sharing (±3% accuracy) and fast transient response. Its architecture supports both internal and external PWM clocking (250 kHz–1 MHz) and load step emulation for bandwidth optimization.
It features integrated differential amplifiers (DAOUT0/DAOUT1) for analog voltage feedback (LTC3888-1 variant), programmable ITH/ITHR compensation nodes, and dedicated DrMOS interfaces - including ISENSEn inputs, VDR_MON sensing, and TSNS0/TSNS1 temperature/fault bus - all coordinated via PMBus commands and stored in on-chip EEPROM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5 V to 26.5 V - supports wide-input industrial and telecom power buses without external pre-regulation. |
| VOUT Range | 0.3 V to 3.45 V - covers core voltages for CPUs, FPGAs, ASICs, and memory subsystems. |
| Output Accuracy | ±0.5% with servo mode - ensures tight regulation under dynamic load changes in high-performance computing rails. |
| Phase Count | 8 native + expandable to >16 phases - enables scalable high-current delivery (e.g., 400 A+) using multiple controllers. |
| Interface | PMBus v1.3 compliant - allows full telemetry (VIN, VOUT, IOUT, temperature), fault logging, and configuration via LTpowerPlay™. |
| Package | 52-pin (5 mm × 8 mm) QFN - thermally enhanced for high-power density layouts with exposed paddle grounding. |
| AEC-Q100 | Qualified Grade 1 (−40°C to +125°C TJ) - validated for automotive ADAS and infotainment power systems. |
Pinout & Package
52-pin QFN (5 mm × 8 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per channel (0 and 1), with eight PWM outputs, eight ISENSE inputs, dual VSENSE+/− pairs, and dedicated DrMOS monitoring pins (VDR_MON, TSNS0/TSNS1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM0–PWM7 (Pins 1,2,5,42,45,46,49,50) | Phase gate drive control outputs | 3.3 V three-state PWM signals driving external DrMOS or discrete MOSFETs; open if unused. |
| ISENSE0–ISENSE7 (Pins 3,4,43,44,47,48,51,52) | DrMOS current monitor inputs | Accepts analog current sense outputs from DrMOS devices; short to IREF if unused. |
| VSENSE0+/VSENSE1+, VSENSE0−/VSENSE1− (Pins 6,7,39,40,41) | Differential output voltage sense inputs | Enable Kelvin-connected remote sensing; short VSENSE− to GND if single-ended. |
| TSNS0/TSNS1 (Pins 8,38) | DrMOS temperature/fault bus interface | Monitors shared thermal/fault status from DrMOS power stages; requires pull-up resistor. |
| VDR_MON (Pin 8) | Gate drive voltage monitor | Measures external DrMOS VDDH supply; configurable via MFR_CHAN_CONFIG command. |
| ITH0/ITH1, ITHR0/ITHR1 (Pins 9,10,37,39) | Loop compensation nodes | Connect low-ESR capacitors to GND for tuning current-mode loop stability and bandwidth. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent control loops | Enables simultaneous regulation of two distinct output rails (e.g., CPU core and SoC I/O) with separate sequencing, margins, and fault thresholds. |
| Internal EEPROM with ECC | Stores configuration, fault logs, and calibration data across power cycles; 10,000 write cycles and 10-year retention at ≤125°C junction. |
| DrMOS-specific monitoring suite | Direct interface to DrMOS devices via ISENSE, TSNS, and VDR_MON - eliminates need for external ADCs or discrete sense circuitry. |
| Programmable loop compensation | Adjustable gm-stage gain (1–5.76 mmho) and RTH compensation (1–62 kΩ) via PMBus or resistors - optimizes stability across varying COUT and VIN conditions. |
| Load step emulation | Generates controlled current transients to characterize loop response and validate bandwidth settings without physical load steps. |
Applications
| Server VR13/VR14 Core Rail | AI Accelerator Power Delivery |
|---|---|
|
Use Scenario: Regulating 0.8 V @ 300 A for high-end Xeon or EPYC processors in 1U rack servers. IC Role / Device Role / Timing Role: Dual-loop 8-phase controller coordinating parallel DrMOS stages with real-time current sharing and telemetry. Use Value: ±3% phase current balance and ±0.5% VOUT accuracy maintain processor stability during burst workloads while PMBus enables dynamic margining and health reporting. |
Use Scenario: Powering 0.75 V GPU cores in NVIDIA A100 or AMD MI300 accelerator modules with strict transient response requirements. IC Role / Device Role / Timing Role: Main PSM controller managing 12+ phase expansion via CLKOUT synchronization and fault propagation across cascaded LTC3888 units. Use Value: Load step emulation validates loop bandwidth against GPU load spikes; internal EEPROM retains calibrated settings across firmware updates. |
| Automotive ADAS Domain Controller | High-Density Storage PSU |
|
Use Scenario: Delivering 1.1 V @ 80 A to radar SoCs and vision processors in AEC-Q100-compliant domain ECUs. IC Role / Device Role / Timing Role: Automotive-qualified dual-loop controller providing sequenced power-up, UV/OV protection, and temperature-aware throttling via TSNS interface. Use Value: AEC-Q100 Grade 1 rating and internal fault logging meet ISO 26262 ASIL-B diagnostic coverage requirements for safety-critical power rails. |
Use Scenario: Generating 1.8 V and 3.3 V rails for NVMe SSD arrays in enterprise storage enclosures with hot-swap capability. IC Role / Device Role / Timing Role: Dual-rail controller implementing time-based sequencing, soft-start ramping, and independent current limiting per rail. Use Value: Independent RUN0/RUN1 control enables staggered power-up to limit inrush; PMBus telemetry tracks rail health across thousands of drive slots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-loop multi-phase DC/DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3887IUHG#TRPBF | Single-loop, 6-phase controller; lacks second main loop and DAOUT outputs. | Suitable only for single-rail systems; cannot replace dual-rail coordination or analog feedback capability of LTC3888IUHG#TRPBF. | Select when cost-sensitive single-output designs require PSM but not dual-loop redundancy or expansion. |
| MP2960AQS-LF-Z | 6-phase, PMBus-enabled controller with integrated MOSFET drivers; no DrMOS-specific TSNS/VDR_MON interfaces. | Requires external current sense amplifiers and thermal monitoring; lacks EEPROM fault logging and load step emulation. | Choose for compact board space where integrated drivers offset loss of DrMOS-native telemetry and configurability. |
Compared with LTC3887IUHG#TRPBF and MP2960AQS-LF-Z, the LTC3888IUHG#TRPBF uniquely combines dual independent loops, DrMOS-optimized monitoring (TSNS/VDR_MON), and EEPROM-backed fault logging - making it the only option for high-reliability, dual-rail, automotive-grade or AI-accelerator power systems requiring synchronized telemetry and configuration persistence.
Availability
LTC3888IUHG#TRPBF is available at Aetrix Electronics and suitable for server VR13/VR14 core rails, AI accelerator power delivery, and automotive ADAS domain controllers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3888IUHG#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 since 1965.
The LTC3888IUHG#TRPBF belongs to Analog Devices' Power by Linear™ digital power system management (PSM) product line, engineered specifically for high-current, multi-phase synchronous buck regulators in datacenter, AI, and automotive applications demanding real-time telemetry and configuration persistence.
FAQ
What is the primary function of the LTC3888IUHG#TRPBF in a power system?
The LTC3888IUHG#TRPBF serves as a dual-loop, 8-phase digital power system management controller that regulates two independent DC/DC synchronous buck outputs with precise voltage, current, and temperature telemetry via PMBus. It coordinates multiple DrMOS power stages, enforces sequencing, monitors faults, and stores configurations in internal EEPROM - making it central to intelligent, high-current power delivery in servers and AI accelerators. The LTC3888IUHG#TRPBF replaces analog-only controllers with full digital supervision and programmability.
Does the LTC3888IUHG#TRPBF support AEC-Q100 qualification, and what grade does it meet?
Yes, the LTC3888IUHG#TRPBF is AEC-Q100 qualified for automotive applications and meets Grade 1 specifications, operating over a junction temperature range of −40°C to +125°C. This qualification confirms its reliability under automotive thermal, vibration, and lifetime stress conditions, enabling use in ADAS domain controllers and infotainment systems. The LTC3888IUHG#TRPBF's internal EEPROM retention and fault logging further support functional safety requirements in ASIL-B environments.
How does the LTC3888IUHG#TRPBF interface with DrMOS power stages?
The LTC3888IUHG#TRPBF interfaces directly with DrMOS devices through dedicated pins: eight ISENSEn inputs accept analog current monitor outputs, TSNS0/TSNS1 connect to the shared temperature/fault bus, and VDR_MON senses the gate drive supply voltage. These interfaces eliminate external sensing components and enable real-time, per-phase current sharing (±3%), thermal monitoring, and fault propagation without host MCU intervention. The LTC3888IUHG#TRPBF uses this data for closed-loop control and PMBus telemetry reporting.
Can the LTC3888IUHG#TRPBF operate without an external microcontroller or PMBus host?
Yes, the LTC3888IUHG#TRPBF can operate autonomously after initial configuration: all critical parameters - including VOUT, current limits, sequencing, and loop compensation - can be stored in its internal EEPROM and loaded at power-up. While PMBus is required for programming and telemetry, the LTC3888IUHG#TRPBF maintains full regulation and fault protection without continuous host communication. Standalone operation is enabled via RUN0/RUN1 pins and factory-default or user-stored settings.
What package type and thermal characteristics does the LTC3888IUHG#TRPBF use?
The LTC3888IUHG#TRPBF is housed in a 52-pin QFN package measuring 5 mm × 8 mm with 0.5 mm pitch and an exposed thermal pad. Its thermal design supports high-power density layouts: the exposed paddle must be soldered to a large PCB copper area for effective heat dissipation, enabling reliable operation at full load across the −40°C to +125°C junction range. The LTC3888IUHG#TRPBF's INTVCC and VDD33 regulators also feature undervoltage lockout (4.45 V and 3.10 V respectively) to ensure stable internal biasing under thermal stress.
LTC3888IUHG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 52-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- PWM
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 26.5V
- Frequency - Switching:
- 10kHz ~ 400kHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- I2C, PMBus
- Control Features:
- Current Limit, Margining, Ramp, Slew Control, Soft Start, Sync, Watchdog
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-QFN (5x8)
LTC3888IUHG#TRPBF FAQ
1.How can I place an order for LTC3888IUHG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3888IUHG#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 LTC3888IUHG#TRPBF reliable?
The price and inventory of LTC3888IUHG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3888IUHG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3888IUHG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3888IUHG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3888IUHG#TRPBF?
LTC3888IUHG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3888IUHG#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 LTC3888IUHG#TRPBF?
For technical support, including LTC3888IUHG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3888IUHG#TRPBF requirements.
6.How does Aetrix verify that LTC3888IUHG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3888IUHG#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 LTC3888IUHG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3888IUHG#TRPBF?
All LTC3888IUHG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3888IUHG#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 LTC3888IUHG#TRPBF part is unused and in its original packaging.
Return procedure for LTC3888IUHG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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