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Analog Devices Inc. ADP3186JRUZ-REEL
- Part No.:
- ADP3186JRUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
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ADP3186JRUZ-REEL.pdf
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Product details
Overview
ADP3186JRUZ-REEL from Analog Devices is a 5-bit programmable, 2-/3-/4-phase synchronous buck controller optimized for AMD Opteron™ processor core power delivery. It features ±1% worst-case differential sensing error over temperature, logic-level PWM outputs (0–5 V), and active current balancing across all phases. It supports up to 1 MHz per phase switching frequency and delivers programmable output voltage from 0.8 V to 1.55 V via VID code decoding.
For engineers reviewing the ADP3186JRUZ-REEL datasheet, ADP3186JRUZ-REEL pinout, ADP3186JRUZ-REEL application, or ADP3186JRUZ-REEL equivalent, key selection criteria include phase configurability (2/3/4), VID-based dynamic voltage scaling, differential remote sensing accuracy, current-limit latch-off delay programmability, and compatibility with external high-current gate drivers such as ADP3110A.
Technical Context
The ADP3186JRUZ-REEL implements a multimode fixed-frequency PWM architecture with internal 5-bit VID DAC, enabling precise core voltage regulation between 0.8 V and 1.55 V referenced to FBRTN. Its current sense amplifier uses CSSUM/CSREF inputs with <±3.5 mV offset (QSOP) and supports DCR- or resistor-based current sensing for loadline positioning.
Phase count is determined dynamically at startup by grounding PWM3/PWM4 pins; it supports 2-, 3-, or 4-phase interleaved operation with master clock division (e.g., 400 kHz master → 100 kHz per phase in 4-phase mode). The RAMPADJ pin sets internal PWM ramp slope via external resistor, while ILIMIT and DELAY pins enable independent programming of current limit threshold (105–145 mV) and latch-off delay (1.5 ms typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.8 V to 1.55 V, digitally set via 5-bit VID code; enables CPU-dynamic voltage scaling for AMD Opteron processors. |
| Differential Sensing Accuracy | ±1% worst-case over 0°C–85°C; achieved via precision VID DAC, FBRTN-referenced error amplifier, and low-offset CSA. |
| Switching Frequency | Up to 1 MHz per phase; set via RT resistor (e.g., 115 kΩ → 400 kHz master clock); divided by active phase count. |
| Current Limit Threshold | 105–145 mV (CSREF – CSCOMP); set by ILIMIT-to-GND resistor; scaled at 10.4 mV/μA for accurate overcurrent response. |
| Latch-Off Delay Time | 1.5 ms typical; programmed via DELAY pin RC network (e.g., 250 kΩ + 12 nF); ensures controlled shutdown during sustained overload. |
| Power Good Window | ±300 mV around nominal DAC output; provides reliable system reset signaling under transient load conditions. |
| PWM Output Drive | Logic-level (0–5 V), open-drain compatible; designed to interface directly with external gate drivers like ADP3110A. |
Pinout & Package
ADP3186JRUZ-REEL is housed in a 28-lead TSSOP package (JEDEC MO-153, 4.4 mm × 9.7 mm), lead pitch 0.65 mm, RoHS-compliant, tape-and-reel format (REEL suffix). Thermal impedance θJA = 100°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID4 (Pins 1–5) | Voltage Identification Inputs | Decode 5-bit CPU VID code; internal pull-up to ~2.2 V; open = logic high; all open triggers No CPU mode (PWM off, PWRGD low). |
| FB / FBRTN (Pins 8/7) | Differential Feedback Inputs | Remote-sense pair: FB connects to CPU sense point via resistor; FBRTN ties to remote ground; 100–200 μA reference current enables accurate Kelvin sensing. |
| PWM1–PWM4 (Pins 27–24) | Logic-Level Phase Outputs | Drive external gate drivers; grounded PWM3/PWM4 disable corresponding phases; 0–5 V swing, 400 μA sink/source capability. |
| SW1–SW4 (Pins 23–20) | Phase Current Balance Inputs | Accept switch-node voltages for per-phase current monitoring; unused SW pins must be left open; input common-mode range −600 mV to +200 mV. |
| ILIMIT / DELAY (Pins 15/12) | Protection Configuration Terminals | ILIMIT-to-GND resistor sets current limit threshold; DELAY-to-GND RC network programs soft-start ramp time and latch-off delay. |
| CSREF / CSSUM / CSCOMP (Pins 16/17/18) | Current Sense Interface | CSREF = current sense reference (tied to inductor common node); CSSUM = summing node for phase currents; CSCOMP = compensation point for loadline gain/slope. |
Key Features
| Feature | Design Value |
|---|---|
| 2-/3-/4-phase programmability | Configured at startup by grounding PWM3/PWM4; eliminates need for separate controllers when scaling output current or optimizing thermal distribution. |
| Active current balancing | Per-phase SW-input monitoring + internal ramp feedback ensures initial balance within ±5% and dynamic thermal redistribution without external circuitry. |
| Programmable short-circuit protection | Adjustable latch-off delay (1.5 ms typical) prevents nuisance tripping during transient overloads while ensuring safe shutdown under hard faults. |
| Differential remote sensing | FB/FBRTN pair with <±3.5 mV CSA offset and 0.05% line regulation enables ±1% output accuracy despite PCB trace IR drop. |
| On-the-fly VID changes | 400 ns VID transition delay and dedicated crowbar blanking allow seamless voltage scaling during CPU state transitions without PWRGD glitching. |
Applications
| Desktop PC VRM for AMD Opteron | Server CPU Core Supply |
|---|---|
Use Scenario: Regulating 12 V input to 0.8–1.55 V core voltage for dual-socket AMD Opteron systems with >100 A total load. IC Role / Device Role / Timing Role: Primary multiphase buck controller managing four synchronous buck stages, coordinating phase interleaving and current sharing. Use Value: Enables tight loadline regulation (±1% sensing), dynamic VID tracking, and thermal-aware current balancing-critical for stable operation under burst workloads. |
Use Scenario: High-efficiency, high-current core supply in 1U/2U rack servers where board space and thermal density constrain single-phase solutions. IC Role / Device Role / Timing Role: Master controller driving external MOSFET drivers (e.g., ADP3110A) across 3 or 4 phases; manages soft-start sequencing and PWRGD assertion timing. Use Value: Reduces output ripple by phase cancellation, lowers RMS inductor current, and distributes thermal load-extending component lifetime and improving power density. |
| VRM Module Design | Industrial Embedded CPU Power |
Use Scenario: Building modular, plug-in VRM modules compliant with AMD's VRM specification for motherboard integration. IC Role / Device Role / Timing Role: VID-decoding buck controller implementing VRM-defined droop characteristics via CSCOMP/CSSUM loop configuration. Use Value: Supports programmable no-load offset and slope functions to meet exact VRM loadline requirements without custom compensation networks. |
Use Scenario: Reliable core power for ruggedized embedded systems using AMD Opteron derivatives in extended-temperature industrial environments. IC Role / Device Role / Timing Role: Temperature-stable controller operating across 0°C–85°C ambient; leverages UVLO (6.5–7.3 V) and crowbar (2.1 V trip) for fault containment. Use Value: Maintains ±1% output accuracy over full temperature range and includes crowbar output to trigger external 12 V short-circuit for catastrophic overvoltage protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6322IRZ | 6-phase capable; integrated MOSFET drivers; no external VID DAC - requires SMBus interface for voltage setting. | Targets Intel VR12 platforms; lacks native AMD VID support and differential FBRTN sensing. | Choose ISL6322IRZ only for Intel-compatible designs requiring higher phase count and integrated drive; not drop-in for AMD Opteron VID-based systems. |
| TPS53679RSLR | 4-phase, 60 A per phase; integrated CSD95490 QFN driver; supports both VID and PMBus; tighter ±0.5% output accuracy. | Designed for modern AMD EPYC and Intel Xeon; includes telemetry, adaptive voltage positioning, and digital loop control. | TPS53679RSLR offers enhanced digital features and accuracy but requires firmware integration and lacks direct pin-for-pin compatibility with ADP3186JRUZ-REEL. |
Compared with ISL6322IRZ and TPS53679RSLR, ADP3186JRUZ-REEL delivers purpose-built analog VID decoding, differential remote sensing, and simple RC-programmable protection - making it optimal for cost-sensitive, AMD-specific VRM designs where analog simplicity and proven stability outweigh digital telemetry needs.
Availability
ADP3186JRUZ-REEL is available at Aetrix Electronics and suitable for desktop PC VRMs, server CPU core supplies, and industrial embedded AMD processor power applications requiring stable component supply, long-lifecycle support, and consistent parametric performance.
Supply support for ADP3186JRUZ-REEL 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 ADP3186 belongs to Analog Devices' CPU power controller product line, engineered specifically for high-efficiency, multi-phase core voltage regulation in AMD Opteron-based computing platforms.
FAQ
What is the operating temperature range for ADP3186JRUZ-REEL?
The ADP3186JRUZ-REEL is specified for commercial operation from 0°C to +85°C ambient temperature. Its internal circuitry-including the VID DAC, error amplifier, and current sense amplifier-is characterized and guaranteed across this range, with ±1% differential sensing accuracy maintained at temperature extremes.
How does ADP3186JRUZ-REEL configure 2-phase vs. 3-phase operation?
ADP3186JRUZ-REEL detects phase count at startup: grounding PWM4 configures 3-phase operation; grounding both PWM3 and PWM4 configures 2-phase. The internal comparator checks PWM pin voltage (<300 mV threshold) during the first two oscillator cycles, then disables the grounded phases permanently until next enable cycle.
Can ADP3186JRUZ-REEL be used with non-AMD processors?
ADP3186JRUZ-REEL is optimized for AMD Opteron VID protocols and voltage ranges (0.8 V–1.55 V). While its 5-bit VID interface may accept other codes, the internal DAC reference, power good thresholds, and crowbar trip points are calibrated for AMD specifications - use outside this context requires validation of VID mapping, loadline behavior, and protection timing.
What is the function of the RAMPADJ pin on ADP3186JRUZ-REEL?
The RAMPADJ pin on ADP3186JRUZ-REEL sets the slope of the internal PWM ramp by connecting an external resistor from the 12 V input to this pin. Adjusting RAMPADJ fine-tunes transient response and feed-forward behavior, especially under input voltage variations - critical for maintaining stability during line transients.
Does ADP3186JRUZ-REEL include built-in MOSFET drivers?
No, ADP3186JRUZ-REEL provides logic-level PWM outputs (0–5 V) intended to drive external high-current gate drivers such as the ADP3110A. It does not integrate power MOSFET drivers; this separation allows flexible selection of discrete or integrated driver solutions based on current, thermal, and layout requirements.
ADP3186JRUZ-REEL Specifications
- Product attributes
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- Manufacturer:
- Analog Devices Inc.
- Series:
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- Product Status:
- Active
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ADP3186JRUZ-REEL FAQ
1.How can I place an order for ADP3186JRUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3186JRUZ-REEL 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 ADP3186JRUZ-REEL reliable?
The price and inventory of ADP3186JRUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3186JRUZ-REEL is usually 5 days.
3.What payment methods are accepted for ADP3186JRUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3186JRUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3186JRUZ-REEL?
ADP3186JRUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3186JRUZ-REEL 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 ADP3186JRUZ-REEL?
For technical support, including ADP3186JRUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3186JRUZ-REEL requirements.
6.How does Aetrix verify that ADP3186JRUZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADP3186JRUZ-REEL 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 ADP3186JRUZ-REEL meets industry standards.
7.What is the process for return or replacement of ADP3186JRUZ-REEL?
All ADP3186JRUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADP3186JRUZ-REEL, 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 ADP3186JRUZ-REEL part is unused and in its original packaging.
Return procedure for ADP3186JRUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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