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Analog Devices Inc. LTC3888IUHG-2#TRPBF
- Part No.:
- LTC3888IUHG-2#TRPBF
- Manufacturer:
- Analog Devices Inc.
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LTC3888IUHG-2#TRPBF.pdf
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Product details
Overview
LTC3888IUHG-2#TRPBF from Analog Devices is a dual-loop, 8-phase synchronous step-down DC/DC controller with digital power system management (PMBus/I²C), supporting 4.5 V to 26.5 V input and 0.3 V to 3.45 V output voltage range, ±0.5% output voltage accuracy, and AEC-Q100 qualification for automotive use in high-current distributed power systems.
For engineers reviewing the LTC3888IUHG-2#TRPBF datasheet, LTC3888IUHG-2#TRPBF pinout, LTC3888IUHG-2#TRPBF application, or LTC3888IUHG-2#TRPBF equivalent, key selection considerations include its 52-pin QFN package, DrMOS interface compatibility, internal EEPROM with ECC and fault logging, programmable PWM loop compensation, and expandability beyond 16 phases via daisy-chain configuration.
Technical Context
The LTC3888IUHG-2#TRPBF implements constant-frequency current-mode control per phase, enabling precise polyphase current sharing (±3% accuracy) and fast transient response. It integrates dual independent control loops-each managing up to four phases-with dedicated VSENSE+/– differential inputs, ISENSEn current monitor interfaces, and DrMOS temperature/fault bus support.
It features dual 16-bit ADCs for telemetry readback (VIN, VOUT, IOUT, temperature), internal 32-bit arithmetic engine for PMBus linear data processing, and configurable PWM timing (250 kHz–1 MHz) with internal or external clock synchronization. The device supports servo-based VOUT regulation with 12-bit resolution and ±0.2% accuracy when enabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5 V to 26.5 V - supports wide-input industrial and automotive supply rails without external pre-regulation. |
| VOUT Range | 0.3 V to 3.45 V - enables direct regulation of core voltages for CPUs, FPGAs, and ASICs. |
| Output Accuracy | ±0.5% - guaranteed over line, load, and temperature; improves to ±0.2% with servo mode enabled. |
| Phase Count | 8-phase base, expandable to >16 phases - allows scalable high-current designs using multiple controllers. |
| PMBus Compliance | Fully compliant with SMBus 3.0 and PMBus 1.3 - enables full telemetry, configuration, and fault logging via standard protocol. |
| Package | 52-pin (5 mm × 8 mm) QFN - thermally enhanced for high-power density applications with exposed paddle. |
| AEC-Q100 Grade | Grade 1 (−40°C to +125°C TJ) - qualified for under-hood automotive power delivery systems. |
Pinout & Package
52-pin QFN package (5 mm × 8 mm) with exposed thermal pad; RoHS-compliant, lead-free, and moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM0–PWM7 (Pins 1,2,5,42,45,46,49,50) | Phase Gate Drive Outputs | Eight 3.3 V three-state PWM outputs driving external DrMOS or discrete MOSFET gate drivers; open if unused. |
| ISENSE0–ISENSE7 (Pins 3,4,43,44,47,48,51,52) | DrMOS Current Monitor Inputs | Accept analog current sense signals from DrMOS devices; short to IREF if unused. |
| VSENSE0+/VSENSE1+ (Pins 7,40) & VSENSE0–/VSENSE1– (Pins 6,41) | Differential Output Voltage Sense Inputs | High-accuracy remote sensing for dual output rails; short VSENSE– to GND if not used. |
| ITH0/ITH1 & ITHR0/ITHR1 (Pins 9,39,10,37) | Loop Compensation Nodes | Analog compensation points for current-mode control loops; require low-ESR capacitors to GND. |
| TSNS0/TSNS1 (Pins 8,38) | DrMOS Temperature/Fault Bus Inputs | Monitor shared thermal/fault status from DrMOS power stages; enable coordinated thermal shutdown. |
| SCL/SDA (Pins 15,16) | PMBus Serial Interface | Open-drain bidirectional interface for configuration, telemetry, and fault reporting; requires pull-up resistors. |
| ALERT (Pin 17) | System Fault Interrupt | Open-drain SMBALERT# output asserting on critical faults (OV, UV, OT, OC); wire-AND capable. |
Key Features
| Feature | Design Value |
|---|---|
| Internal EEPROM with ECC | Stores configuration, fault logs, and calibration data across power cycles; 10,000 write cycles, 10-year retention at ≤125°C junction. |
| DrMOS Interface Suite | Direct support for VDR_MON gate drive monitoring, TSNS temperature/fault bus, and ISENSE current feedback - eliminates external signal conditioning. |
| Load Step Emulation | On-chip circuitry simulates rapid load transients to validate loop stability and optimize compensation without physical load changes. |
| Programmable Loop Compensation | Configurable zero/pole placement via resistor networks or PMBus commands - adapts bandwidth to input voltage and output capacitance. |
| PolyPhase® Current Sharing | Accurate inter-phase current balancing (±3%) using average-current-mode technique - ensures thermal uniformity and derating margin. |
Applications
| Server VR13 Core Power | Automotive ADAS Domain Controller |
|---|---|
|
Use Scenario: Regulating 0.8 V @ 300 A for high-performance CPU cores in rack-mounted servers. IC Role / Device Role / Timing Role: Dual-loop 8-phase controller coordinating parallel DrMOS stages with real-time telemetry and sequencing. Use Value: Enables dynamic voltage scaling, precise current sharing, and PMBus-based health monitoring required by VR13 specification. |
Use Scenario: Supplying 1.2 V @ 120 A and 0.9 V @ 80 A to SoC and AI accelerator in autonomous driving ECUs. IC Role / Device Role / Timing Role: AEC-Q100-qualified digital controller managing dual independent rails with synchronized startup and fault propagation. Use Value: Meets ASIL-B functional safety requirements via EEPROM-stored fault logs, redundant monitoring, and thermal-aware shutdown. |
| Network Switch ASIC Power | Industrial FPGA Power System |
|
Use Scenario: Delivering tightly regulated 0.75 V @ 200 A to multi-die switch ASICs with strict ripple and transient specs. IC Role / Device Role / Timing Role: High-bandwidth current-mode controller with load-step emulation and programmable compensation for optimal stability. Use Value: Achieves <50 mV undershoot on 50% load steps while maintaining ±0.5% DC accuracy across temperature. |
Use Scenario: Powering Xilinx Versal or Intel Agilex FPGAs requiring multiple sequenced, monitored rails (1.0 V, 0.85 V, 0.6 V). IC Role / Device Role / Timing Role: Digital power manager providing time- and voltage-based sequencing, margining, and fault logging via LTpowerPlay GUI. Use Value: Reduces validation time through deterministic startup behavior and post-deployment telemetry accessible over PMBus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-loop multiphase controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3887IUHG#TRPBF | Single-loop 8-phase controller; lacks second independent control loop and dual VSENSE channels. | Suitable only for single-rail systems; cannot manage two independent output voltages with separate sequencing. | Select when only one regulated rail is needed and cost-sensitive design permits reduced feature set. |
| MP2965GQ-10-Z | 8-phase PMBus controller with integrated MOSFET drivers; no DrMOS-specific interfaces (TSNS, VDR_MON) or EEPROM fault logging. | Targets cost-optimized server VRMs; lacks AEC-Q100 qualification and automotive-grade reliability features. | Choose for non-automotive, high-volume server applications where integrated drivers reduce BOM count. |
Compared with LTC3887IUHG#TRPBF and MP2965GQ-10-Z, the LTC3888IUHG-2#TRPBF uniquely delivers dual independent control loops, DrMOS-optimized monitoring interfaces, and automotive-grade EEPROM fault logging - making it the only option for safety-critical, multi-rail automotive or industrial systems requiring deterministic telemetry and long-term configuration persistence.
Availability
LTC3888IUHG-2#TRPBF is available at Aetrix Electronics and suitable for server VR13 core power, automotive ADAS domain controllers, and industrial FPGA power systems requiring stable component supply, long lifecycle support, and AEC-Q100 compliance.
Supply support for LTC3888IUHG-2#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 LTC3888 product line was designed specifically for digitally managed, high-current multiphase DC/DC conversion in mission-critical infrastructure - emphasizing PMBus interoperability, fault resilience, and automotive-grade reliability.
FAQ
What is the primary function of the LTC3888IUHG-2#TRPBF in a power system?
The LTC3888IUHG-2#TRPBF serves as a dual-loop, 8-phase synchronous step-down DC/DC controller with integrated digital power system management. It regulates two independent output rails (e.g., CPU core and SoC I/O), provides real-time telemetry (voltage, current, temperature), executes fault responses, and stores configuration in internal EEPROM - all via PMBus. Its architecture enables precise current sharing and fast transient response in high-current applications like servers and automotive ADAS systems.
Does the LTC3888IUHG-2#TRPBF support AEC-Q100 qualification, and what grade does it meet?
Yes, the LTC3888IUHG-2#TRPBF is AEC-Q100 qualified and meets Grade 1 specifications (−40°C to +125°C operating junction temperature). This qualification confirms its suitability for automotive under-hood applications, including domain controllers and ADAS power supplies, with validated reliability, ESD robustness, and thermal performance under extended temperature stress.
How does the LTC3888IUHG-2#TRPBF interface with DrMOS power stages?
The LTC3888IUHG-2#TRPBF interfaces directly with DrMOS devices using dedicated pins: ISENSEn inputs accept current monitor outputs, TSNSn inputs connect to the shared temperature/fault bus, and VDR_MON monitors gate drive voltage. These interfaces eliminate external signal conditioning, enable coordinated thermal shutdown, and support accurate polyphase current sharing - all confirmed in the datasheet's DrMOS Interface section and Figure 1.
What telemetry data can be read back from the LTC3888IUHG-2#TRPBF via PMBus?
Via PMBus, the LTC3888IUHG-2#TRPBF supports readback of input voltage (10-bit resolution, ±1% TUE), output voltage (16-bit resolution, ±0.2% TUE with servo), output current (10-bit resolution, ±1% TUE), die temperature (10-bit resolution, ±1.5°C TUE), and status registers. All telemetry is processed by internal 32-bit arithmetic and formatted per PMBus linear data standards - verified in Table 2 and Section "ADC Readback Telemetry".
Can the LTC3888IUHG-2#TRPBF operate without external programming resistors?
Yes, the LTC3888IUHG-2#TRPBF supports full configuration via PMBus commands alone - including VOUT, current limits, soft-start, sequencing, and compensation - with settings stored in internal EEPROM for automatic recall at power-up. External resistors are optional and used only for initial address setting or fallback analog configuration; they are not required for basic operation or digital management.
LTC3888IUHG-2#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
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- Topology:
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- Output Type:
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- Number of Outputs:
- -
- Voltage - Input (Min):
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- Voltage - Input (Max):
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- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
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- Mounting Type:
- -
- Supplier Device Package:
- -
LTC3888IUHG-2#TRPBF FAQ
1.How can I place an order for LTC3888IUHG-2#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3888IUHG-2#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-2#TRPBF reliable?
The price and inventory of LTC3888IUHG-2#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-2#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3888IUHG-2#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3888IUHG-2#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3888IUHG-2#TRPBF?
LTC3888IUHG-2#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3888IUHG-2#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-2#TRPBF?
For technical support, including LTC3888IUHG-2#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3888IUHG-2#TRPBF requirements.
6.How does Aetrix verify that LTC3888IUHG-2#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3888IUHG-2#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-2#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3888IUHG-2#TRPBF?
All LTC3888IUHG-2#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3888IUHG-2#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-2#TRPBF part is unused and in its original packaging.
Return procedure for LTC3888IUHG-2#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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