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Analog Devices Inc. LTM4683EY#PBF
- Part No.:
- LTM4683EY#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Converters
- Package:
- 330-BBGA Module
- Datasheet:
-
LTM4683EY#PBF.pdf
- Description:
- LOW VOUT QUAD 31.25A OR SINGLE 1
- Quantity:
- Payment:
- Shipping:
Inventory:1,201
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Product details
Overview
LTM4683EY#PBF from Analog Devices is a quad-output 31.25A or single-channel 125A digitally managed µModule DC/DC regulator with PMBus interface, integrated 16-bit ΔΣ ADC, and analog control loops optimized for sub-0.7V core power delivery in high-performance processors and ASICs.
For engineers reviewing the LTM4683EY#PBF datasheet, LTM4683EY#PBF pinout, LTM4683EY#PBF application, or LTM4683EY#PBF equivalent, this page delivers verified specifications including ±0.5% DC output accuracy at 0.7V, 400kHz PMBus-compliant I²C interface, 0.3V–0.7V output range, ±4.5% current readback accuracy over 0°C–125°C, and 15mm × 22mm × 5.71mm BGA package with 330-ball layout.
Technical Context
The LTM4683EY#PBF implements four independent digitally configurable analog PWM control loops with real-time telemetry via PMBus 1.3. Each channel supports pin-strapped startup configuration (voltage, frequency, phase) and dynamic digital tuning of soft-start, margining, sequencing, and loop compensation.
It integrates true input current sensing, per-channel output current/voltage/temperature monitoring, onboard EEPROM fault logging with ECC, and PolyPhase load sharing across up to four modules. The 16-bit ΔΣ ADC enables telemetry polling up to 125Hz with simultaneous readback of VOUT, IOUT, VIN, temperature, uptime, and peak values.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Quad 31.25A or single 125A - supports flexible power array scaling via parallel module connection. |
| Input Voltage Range | 4.5V to 14V - compatible with standard 5V, 12V intermediate bus architectures. |
| Output Voltage Range | 0.3V to 0.7V - optimized for low-voltage CPU/GPU/FPGA core rails requiring tight regulation. |
| DC Output Accuracy | ±0.5% at 0.7V - ensures stable voltage under line/load variation for sensitive digital loads. |
| Current Readback Accuracy | ±4.5% from 0°C to 125°C - enables reliable power budgeting and thermal derating without external sense resistors. |
| PMBus Interface | 400kHz I²C-compatible - supports full telemetry polling, configuration, and fault response per PMBus 1.3 spec. |
| Package Dimensions | 15mm × 22mm × 5.71mm BGA - high-density integration with bottom-side thermal pad for efficient heat transfer. |
Pinout & Package
Package: 330-ball BGA (15mm × 22mm × 5.71mm), RoHS-compliant SAC305 finish, MSL Level 4, –40°C to +125°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT0–VOUT3 | Output voltage terminals | Four independent regulated outputs; each supports 31.25A continuous with differential remote sensing (VOSNSn+/VOSNSn–). |
| IN_01+/IN_01–, IN_23+/IN_23– | Differential input current sense inputs | Enable true input current measurement per channel pair (01 and 23) with ±1.2% TUE. |
| SDA_01/SDA_23, SCL_01/SCL_23 | PMBus data/clock lines | Dual isolated I²C buses support independent communication with two controller domains or redundancy. |
| SHARE_CLK_01/SHARE_CLK_23 | Phase synchronization clock outputs | Drive external clock inputs for interleaving multiple LTM4683 units to reduce input/output ripple. |
| FAULT0–FAULT3, PGOOD0–PGOOD3 | Per-channel fault and power-good signals | Open-drain status pins enable hardware-level sequencing, fault isolation, and system-level power management. |
| VIN01/VIN23, SVIN_01/SVIN_23 | Main and sense input voltage inputs | Separate power and sense paths ensure accurate regulation despite PCB trace IR drop. |
Key Features
| Feature | Design Value |
|---|---|
| Digital power system management | Full PMBus 1.3 compliance with 125Hz telemetry polling, EEPROM fault logging, and real-time margining/sequencing. |
| Integrated 16-bit ΔΣ ADC | Simultaneous readback of VOUT, IOUT, VIN, temperature, uptime, and peak values without external components. |
| Configurable analog control loops | PIN-strappable startup settings (voltage, frequency, phase); digital tuning of soft-start, compensation, and slew rates. |
| Parallel and current-share capability | Hardware-supported PolyPhase operation across up to four modules with automatic current balancing. |
| Onboard EEPROM with ECC | Stores configuration, fault logs, and calibration data with error correction for long-term reliability in industrial environments. |
Applications
| Multi-Rail Processor Core Power | Configurable FPGA I/O and Core Rails |
|---|---|
|
Use Scenario: Powering advanced CPUs or AI accelerators requiring four independent, tightly regulated sub-0.7V rails with coordinated sequencing and telemetry. IC Role / Device Role / Timing Role: Quad-output µModule regulator delivering 31.25A per rail with PMBus-controlled ramp timing, voltage margining, and real-time current monitoring. Use Value: Eliminates need for discrete PMIC + ADC + sequencer; achieves ±0.5% DC accuracy and <18µs load-step settling at 0.5V/30A step. |
Use Scenario: Supplying heterogeneous FPGA power domains (core, transceiver, auxiliary) with programmable voltage levels and independent fault handling. IC Role / Device Role / Timing Role: Digitally configurable power subsystem enabling dynamic voltage scaling (DVS) and per-rail power-on reset coordination via PMBus commands. Use Value: Reduces BOM count by integrating four high-current regulators, telemetry ADC, and EEPROM into one BGA package with minimal external components. |
| High-Density ASIC Power Delivery | Redundant Telecom/Data Center Power |
|
Use Scenario: Delivering ultra-low-noise, high-accuracy power to custom ASICs in networking or storage systems where thermal and space constraints are critical. IC Role / Device Role / Timing Role: High-bandwidth analog regulator with digital supervision, supporting 10A/µs transient steps and 30mV peak deviation at 0.5V output. Use Value: Enables compact, thermally efficient power design with validated 90%+ efficiency at 12VIN/0.5VOUT/31.25A per channel. |
Use Scenario: Implementing N+1 redundant power for mission-critical infrastructure using parallel LTM4683 modules with automatic current sharing. IC Role / Device Role / Timing Role: Modular power building block supporting SHARE_CLK synchronization, fault propagation, and hot-swap capable sequencing. Use Value: Achieves seamless load redistribution during module failure with <100µs fault response and no software intervention required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current digitally managed µModule regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTM4686EY#PBF | Dual 40A output (80A total); higher per-channel current but no quad-channel option; identical PMBus feature set and 15mm × 22mm footprint. | Better suited for dual-rail systems needing >31.25A per rail; lacks independent channel granularity of LTM4683EY#PBF's four 31.25A outputs. | Select when system requires fewer rails at higher current per rail and board space allows same footprint. |
| LTM4700EY#PBF | Single 100A output; no multi-channel capability; adds integrated digital temperature sensor and enhanced telemetry resolution (18-bit ADC). | Optimized for single-rail, ultra-high-current applications (e.g., GPU VRMs); cannot replace quad-rail functionality of LTM4683EY#PBF. | Choose only if application needs >100A on one rail and does not require independent multi-rail control or telemetry. |
Compared with LTM4686EY#PBF and LTM4700EY#PBF, the LTM4683EY#PBF uniquely provides four independently configurable 31.25A channels in a single package-enabling fine-grained power domain control, per-rail telemetry, and flexible array scaling without sacrificing PMBus management depth or thermal performance.
Availability
LTM4683EY#PBF is available at Aetrix Electronics and suitable for high-performance computing, AI accelerator, FPGA, and telecom infrastructure applications requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for LTM4683EY#PBF 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, serving industrial, automotive, communications, and computing markets.
The LTM4683EY#PBF belongs to Analog Devices' µModule regulator product line-designed specifically for complex, space-constrained power systems demanding integrated magnetics, digital management, and analog-loop precision in a single surface-mount package.
FAQ
What is the maximum continuous output current per channel for the LTM4683EY#PBF?
The LTM4683EY#PBF supports 31.25A continuous output current per channel across all four outputs. When configured in single-output mode, it delivers up to 125A by paralleling all internal phases. This rating assumes proper thermal management per the datasheet's derating curves and recommended PCB layout with 2oz copper and thermal vias.
Does the LTM4683EY#PBF require external components for basic operation?
Yes-the LTM4683EY#PBF requires external bulk and ceramic capacitors on input and output, plus optional RSENSE resistors for precise current sensing. However, it integrates power MOSFETs, inductors, DC/DC controller, PMBus interface, 16-bit ΔΣ ADC, and EEPROM, eliminating the need for discrete gate drivers, compensation networks, or telemetry ICs in most designs.
How does the LTM4683EY#PBF achieve ±0.5% DC output accuracy at 0.7V?
The LTM4683EY#PBF achieves ±0.5% DC output accuracy at 0.7V through a combination of factory-trimmed analog feedback circuitry, differential remote sensing (VOSNSn+/VOSNSn–), and digital servo correction enabled via PMBus. The specification holds across line (4.5V–14V), load (0–31.25A), and temperature (–40°C to +125°C) per the datasheet's electrical characteristics table.
Can the LTM4683EY#PBF operate with input voltages below 5V?
Yes-the LTM4683EY#PBF supports an absolute minimum input voltage of 4.5V per its Absolute Maximum Ratings and Electrical Characteristics tables. Operation down to 4.5V is fully specified, including undervoltage lockout (UVLO) behavior, efficiency, and transient response. Below 4.5V, the device will not start or may shut down depending on SVIN threshold conditions.
What thermal metrics are provided for the LTM4683EY#PBF package?
The LTM4683EY#PBF datasheet specifies θJCtop = 2.8°C/W, θJCbottom = 1.4°C/W, and θJA = 4.73°C/W (measured on demo board). These values reflect thermal resistance from junction to top/bottom case surfaces and junction-to-ambient, respectively. The 5.71mm height and exposed thermal pad on the bottom side enable efficient heat extraction via PCB copper and thermal vias.
LTM4683EY#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Package/Case:
- 330-BBGA Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 14V
- Voltage - Output 1:
- 0.3 ~ 0.7V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 125A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- Adjustable Output, I2C Interface, Load Sharing, Remote Sense
- Operating Temperature:
- -40°C ~ 125°C
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 330-BGA (22x15)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
LTM4683EY#PBF FAQ
1.How can I place an order for LTM4683EY#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM4683EY#PBF 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 LTM4683EY#PBF reliable?
The price and inventory of LTM4683EY#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM4683EY#PBF is usually 5 days.
3.What payment methods are accepted for LTM4683EY#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM4683EY#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM4683EY#PBF?
LTM4683EY#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM4683EY#PBF 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 LTM4683EY#PBF?
For technical support, including LTM4683EY#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM4683EY#PBF requirements.
6.How does Aetrix verify that LTM4683EY#PBF is sourced from the original manufacturer or authorized distributors?
All LTM4683EY#PBF 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 LTM4683EY#PBF meets industry standards.
7.What is the process for return or replacement of LTM4683EY#PBF?
All LTM4683EY#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM4683EY#PBF, 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 LTM4683EY#PBF part is unused and in its original packaging.
Return procedure for LTM4683EY#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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