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Analog Devices Inc. LTC3888EUHG-1#TRPBF
- Part No.:
- LTC3888EUHG-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 52-WFQFN Exposed Pad
- Datasheet:
-
LTC3888EUHG-1#TRPBF.pdf
- Description:
- DUAL OUTPUT 8-PHASE STEP-DOWN DC
- Quantity:
- Payment:
- Shipping:
Inventory:2,279
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Product details
Overview
LTC3888EUHG-1#TRPBF from Analog Devices is a PMBus-compliant dual-loop 8-phase synchronous step-down DC/DC controller designed for high-current digital power system management in server and telecom power rails. It supports 4.5 V to 26.5 V input, 0.3 V to 3.45 V output, ±0.5% output voltage accuracy, programmable PWM loop compensation, and internal EEPROM with ECC for fault logging.
For engineers reviewing the LTC3888EUHG-1#TRPBF datasheet, LTC3888EUHG-1#TRPBF pinout, LTC3888EUHG-1#TRPBF application, or LTC3888EUHG-1#TRPBF equivalent, key selection criteria include phase expandability beyond 16 phases, DrMOS interface support (current/temperature/fault bus), AEC-Q100 qualification, and dual-loop independent rail control with PMBus telemetry readback of VIN, VOUT, IOUT, and temperature.
Technical Context
The LTC3888EUHG-1#TRPBF implements constant-frequency current-mode control per phase with two independent main/subordinate control loops, enabling precise regulation of two separate output rails. Each loop supports up to eight phases and integrates dedicated differential amplifiers (DAOUT), error amplifier inputs (VFB), and ITH/ITHR compensation nodes for analog loop tuning.
It features native DrMOS interface capability-including ISENSEn current monitor inputs, TSNSn temperature/fault bus, and VDR_MON gate drive voltage sensing-alongside full PMBus v1.3 compliance for configuration, telemetry, and fault logging via internal 32-bit EEPROM with CRC protection and 10,000 write-cycle endurance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5 V to 26.5 V - Supports wide-input industrial and server supply rails without external pre-regulation. |
| VOUT Range | 0.3 V to 3.45 V - Covers core, I/O, and memory rails including sub-1 V CPU cores with ±0.5% accuracy using servo mode. |
| Output Accuracy | ±0.5% with servo - Achieved via closed-loop VOUT_COMMAND adjustment using internal 16-bit ADC and DAC-controlled ITH reference. |
| Phase Support | 8-phase base, expandable to >16 phases - Enables scalable high-current designs using multiple controllers in master/slave configuration. |
| PMBus Interface | Compliant v1.3 - Supports real-time telemetry (VIN/VOUT/IOUT/TEMP), fault logging, sequencing, margining, and EEPROM-stored configuration at power-up. |
| Package | 52-pin QFN (5 mm × 8 mm) - Thermally enhanced layout with exposed paddle for high-power density and thermal management in multi-phase layouts. |
| AEC-Q100 | Qualified - Validated for automotive-grade reliability (Grade 1: –40°C to +125°C junction), enabling use in ADAS and infotainment power systems. |
Pinout & Package
52-pin (5 mm × 8 mm) QFN package with exposed thermal pad. Pin functions validated per Analog Devices Rev. E datasheet Figures 5–7 and Table 4.
| 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 signals directly controlling external DrMOS or discrete FETs; 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 to prevent floating input. |
| VSENSE0+/VSENSE1+, VSENSE0–/VSENSE1– (Pins 6,7,39,40,41) | Differential output voltage sense | High-precision remote sensing inputs for dual-rail feedback; VSENSE+ referenced to VSENSE– for noise rejection. |
| ITH0/ITH1, ITHR0/ITHR1 (Pins 9,10,37,38) | Loop compensation nodes | Analog compensation points for peak current mode control; require low-ESR capacitors to GND for bandwidth and stability tuning. |
| TSNS0/TSNS1 (Pins 8,39) | DrMOS temperature/fault bus | Monitors shared thermal/fault status from DrMOS power stages; enables coordinated thermal shutdown across phases. |
| VDR_MON (Pin 8) | Gate drive voltage monitor | Measures external DrMOS gate drive supply (e.g., 5 V or 12 V); configurable via MFR_CHAN_CONFIG to detect undervoltage faults. |
| SCL/SDA (Pins 15,16) | PMBus serial interface | Open-drain bidirectional bus lines requiring external pull-ups; support 10–400 kHz operation with clock stretching. |
| ALERT, FAULT0/FAULT1 (Pins 17,18,19) | Fault signaling and propagation | Open-drain outputs for system-level fault reporting (ALERT) and inter-channel fault sharing (FAULTn) with programmable polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent control loops | Enables simultaneous regulation of two distinct output rails (e.g., CPU core + SoC I/O) with separate sequencing, margins, and fault thresholds. |
| DrMOS interface integration | Direct support for current monitoring (ISENSEn), temperature/fault bus (TSNSn), and gate drive voltage sensing (VDR_MON) eliminates external signal conditioning. |
| Programmable loop compensation | Configurable via PMBus or analog RC networks on ITH/ITHR pins, allowing bandwidth optimization for varying input voltage and output capacitance. |
| Internal EEPROM with ECC | Stores configuration, fault logs, and telemetry history with error correction; retains data for 10 years at ≤125°C junction temperature. |
| Load step emulation | Generates controlled transient load steps via ITH modulation to validate loop response and optimize compensation without physical load changes. |
| Expandable phase architecture | Supports >16-phase operation via CLKOUT expansion clock and SHARE_CLOCK synchronization, enabling >100 A output rails with tight current sharing (±3%). |
Applications
| Server VR13/VR14 Core Rail | AI Accelerator Memory Supply |
|---|---|
|
Use Scenario: Regulating sub-0.8 V, high-current (≥300 A) CPU core voltage in dual-socket servers with dynamic load transients exceeding 100 A/µs. IC Role / Device Role / Timing Role: Dual-loop 8-phase controller managing two independent core domains, coordinating phase interleaving and current sharing via SHARE_CLOCK. Use Value: ±0.5% VOUT accuracy and 45 ms telemetry update rate enable real-time adaptive voltage scaling (AVS) and accurate power budgeting for Intel/AMD processors. |
Use Scenario: Powering HBM2E/GDDR6 memory subsystems requiring tightly regulated 1.1–1.35 V rails with fast transient response and thermal-aware throttling. IC Role / Device Role / Timing Role: Primary controller interfacing with DrMOS devices' TSNS bus to trigger per-phase thermal derating before junction limits are exceeded. Use Value: Integrated temperature/fault bus monitoring reduces BOM count by eliminating discrete thermal sensors and enables predictive throttling via PMBus STATUS_WORD reads. |
| Automotive ADAS Domain Controller | 5G Baseband Radio Front-End |
|
Use Scenario: Delivering 1.8 V @ 40 A and 0.85 V @ 60 A to radar SoCs and vision processors in AEC-Q100 qualified chassis modules. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 qualified dual-rail controller providing independent soft-start, sequencing, and UV/OV protection per rail under extended temperature cycling. Use Value: Internal EEPROM stores fault logs across ignition cycles, enabling root-cause analysis of intermittent overtemperature events in field-deployed units. |
Use Scenario: Generating stable 3.3 V and 1.2 V supplies for massive MIMO RF transceivers subject to burst-mode RF interference and thermal gradients. IC Role / Device Role / Timing Role: Synchronizing switching frequency across multiple LTC3888EUHG-1#TRPBF controllers via SYNC pin to suppress beat frequencies in sensitive analog front-ends. Use Value: 250 kHz–1 MHz programmable fSW range allows noise spectrum placement away from critical RF bands while maintaining <60 ns minimum on-time for high duty-cycle operation. |
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 |
|---|---|---|---|
| LTC3887IUH#TRPBF | Single-loop 8-phase controller; lacks second independent control loop and DAOUT differential amplifiers. | Suitable only for single-rail systems; cannot replace LTC3888EUHG-1#TRPBF in dual-rail configurations requiring independent sequencing or margins. | Select when cost-sensitive single-output designs dominate and dual-loop functionality is unnecessary. |
| MP2960AQS-LF-Z | 6-phase max, no internal EEPROM, limited PMBus command set (no load step emulation or servo calibration), no TSNS/DrMOS temperature bus. | Targeted at mid-tier telecom and storage where full digital power management telemetry and fault logging are not required. | Choose for simpler, lower-cost deployments where AEC-Q100 qualification and >8-phase scalability are not needed. |
Compared with LTC3887IUH#TRPBF and MP2960AQS-LF-Z, the LTC3888EUHG-1#TRPBF uniquely delivers dual independent control loops with integrated DrMOS interfaces, AEC-Q100 qualification, and EEPROM-based fault logging-making it the only option for high-reliability, dual-rail, automotive-qualified, or >8-phase server power systems requiring full PMBus telemetry and autonomous fault recovery.
Availability
LTC3888EUHG-1#TRPBF is available at Aetrix Electronics and suitable for server VR13/VR14 core rails, AI accelerator memory supplies, automotive ADAS domain controllers, and 5G radio front-end power systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LTC3888EUHG-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 since 1965.
The LTC3888EUHG-1#TRPBF belongs to Analog Devices' Power by Linear™ digital multiphase controller family, engineered specifically for high-current, digitally managed power delivery in datacenter, AI, and automotive applications demanding PMBus telemetry, fault resilience, and AEC-Q100 compliance.
FAQ
What is the primary function of the LTC3888EUHG-1#TRPBF in a power system?
The LTC3888EUHG-1#TRPBF serves as a dual-loop 8-phase synchronous step-down DC/DC controller that regulates two independent output rails with digital power system management. It provides precise voltage control (±0.5% accuracy), real-time telemetry (VIN/VOUT/IOUT/temperature), fault logging via internal EEPROM, and seamless interface to DrMOS power stages-enabling intelligent, adaptive power delivery in high-density server and AI hardware. The LTC3888EUHG-1#TRPBF is essential for applications requiring coordinated multi-phase operation, AEC-Q100 reliability, and full PMBus v1.3 compliance.
Does the LTC3888EUHG-1#TRPBF support both analog and digital output voltage control?
Yes, the LTC3888EUHG-1#TRPBF supports both modes: analog control via resistor dividers on VFB0/VFB1 pins (for legacy compatibility), and digital PMBus-based control using VOUT_COMMAND with servo calibration for ±0.5% accuracy. Unlike the LTC3888-1 variant, the LTC3888EUHG-1#TRPBF does not require external resistors for basic PMBus operation but retains full analog flexibility. Its servo loop continuously adjusts ITH to maintain target VOUT, making the LTC3888EUHG-1#TRPBF ideal for dynamically scaled loads like CPUs and GPUs.
How does the LTC3888EUHG-1#TRPBF achieve accurate current sharing across phases?
The LTC3888EUHG-1#TRPBF achieves ±3% phase-to-phase current sharing accuracy through PolyPhase® current balancing using synchronized PWM clocks, matched internal gain paths, and precise ISENSEn input matching (±6.5% tolerance). It leverages the SHARE_CLOCK pin for inter-controller synchronization and supports DrMOS current monitor inputs with built-in offset compensation. This ensures stable load distribution even under rapid transients-critical for the LTC3888EUHG-1#TRPBF's use in >100 A server VRMs where thermal imbalance must be avoided.
Can the LTC3888EUHG-1#TRPBF be used in automotive applications?
Yes, the LTC3888EUHG-1#TRPBF is AEC-Q100 qualified (Grade 1: –40°C to +125°C junction), making it suitable for automotive ADAS domain controllers, infotainment SoCs, and radar processors. Its internal EEPROM retains fault logs across ignition cycles, and its TSNS/DrMOS temperature bus enables coordinated thermal throttling. The LTC3888EUHG-1#TRPBF meets stringent automotive reliability requirements without derating, unlike non-qualified variants-ensuring robust operation in vibration-prone, thermally aggressive vehicle environments.
What development tools support configuration and telemetry of the LTC3888EUHG-1#TRPBF?
The LTC3888EUHG-1#TRPBF is fully supported by Analog Devices' LTpowerPlay™ GUI, which enables real-time PMBus configuration, telemetry monitoring (VIN/VOUT/IOUT/temperature), fault log review, and EEPROM programming. It also interfaces with the DC1613 demonstration board for hardware validation. No custom firmware is needed-the LTC3888EUHG-1#TRPBF operates out-of-box with default EEPROM settings, and all PMBus commands (including MFR_PWM_MODE_LTC3888-1) are accessible via standard SMBus hosts. LTpowerPlay simplifies servo calibration and loop compensation tuning for the LTC3888EUHG-1#TRPBF.
LTC3888EUHG-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 52-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 2
- Output Phases:
- 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 26.5V
- Frequency - Switching:
- 250kHz ~ 1MHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- No
- Clock Sync:
- Yes
- Serial Interfaces:
- I2C, PMBus
- Control Features:
- Current Limit, Enable, Frequency Control, Phase Control, Power Good, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-QFN (5x8)
LTC3888EUHG-1#TRPBF FAQ
1.How can I place an order for LTC3888EUHG-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3888EUHG-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 LTC3888EUHG-1#TRPBF reliable?
The price and inventory of LTC3888EUHG-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 LTC3888EUHG-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3888EUHG-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3888EUHG-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3888EUHG-1#TRPBF?
LTC3888EUHG-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3888EUHG-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 LTC3888EUHG-1#TRPBF?
For technical support, including LTC3888EUHG-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3888EUHG-1#TRPBF requirements.
6.How does Aetrix verify that LTC3888EUHG-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3888EUHG-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 LTC3888EUHG-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3888EUHG-1#TRPBF?
All LTC3888EUHG-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3888EUHG-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 LTC3888EUHG-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3888EUHG-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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