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Analog Devices Inc. ADP3168JRUZ-REEL-AD
- Part No.:
- ADP3168JRUZ-REEL-AD
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADP3168JRUZ-REEL-AD.pdf
- Description:
- 6 BIT, PROGRAMMABLE 2-, 3-, 4-PH
- Quantity:
- Payment:
- Shipping:
Inventory:12,300
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Product details
Overview
ADP3168JRUZ-REEL-AD from Analog Devices is a 6-bit programmable, 2-/3-/4-phase synchronous buck controller optimized for Intel® processor core voltage regulation. It delivers ±10 mV differential sensing error over temperature, supports up to 1 MHz per phase switching, and provides logic-level PWM outputs for external high-power drivers. Used in VRM modules for next-generation desktop CPUs.
For engineers reviewing the ADP3168JRUZ-REEL-AD datasheet, ADP3168JRUZ-REEL-AD pinout, ADP3168JRUZ-REEL-AD application, or ADP3168JRUZ-REEL-AD equivalent, key selection criteria include VID-programmable 0.8375 V–1.6 V output range, active current balancing across phases, programmable short-circuit protection with latch-off delay, and support for remote differential feedback via FB/FBRTN pins.
Technical Context
The ADP3168JRUZ-REEL-AD implements a multimode fixed-frequency PWM architecture with internal 6-bit VID DAC compliant with Intel VRD/VRM 10 specifications. Its phase count (2/3/4) is determined dynamically by grounding PWM3/PWM4 pins, and master clock frequency (0.25–4 MHz) is set via external RT resistor.
It integrates a precision current-sense amplifier (±1.5 mV offset) referenced to CSREF, enabling accurate load-line positioning and current-limit detection. The device uses differential remote sensing (FB/FBRTN), active impedance control mode for droop compensation, and independent thermal balancing via SW1–SW4 inputs with programmable ramp adjustment through RAMPADJ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.8375 V to 1.6000 V, digitally set via 6-bit VID code per Intel VRM spec |
| Differential Sensing Error | ±10 mV worst-case over 0°C–85°C, enabling tight regulation at CPU sense point |
| Phase Configuration | Selectable 2-, 3-, or 4-phase operation via PWM3/PWM4 pin grounding |
| Switching Frequency | Up to 1 MHz per phase; master clock 0.25–4 MHz, divided by active phase count |
| Current Sense Accuracy | ±1.5 mV input offset voltage on CSA, supporting ESR/resistor-based current sensing |
| Power Good Threshold | ±200 mV undervoltage and +90 mV to +200 mV overvoltage relative to DAC output |
| Short-Circuit Protection | Programmable latch-off delay (e.g., 600 µs with 250 kΩ/4.7 nF) and crowbar response |
Pinout & Package
ADP3168JRUZ-REEL-AD is housed in a 28-lead TSSOP package (JEDEC MO-153, 4.4 mm × 9.7 mm), lead pitch 0.65 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID5 | Voltage ID DAC Inputs | 6-bit parallel interface to CPU; open = logic high; sets output voltage per Table 4 |
| FB / FBRTN | Differential Feedback Inputs | Remote sense pair: FB connects to CPU VSENSE via resistor; FBRTN ties to VSENSE ground |
| PWM1–PWM4 | Logic-Level PWM Outputs | Drive external gate drivers (e.g., ADP3418); grounded pins disable corresponding phases |
| SW1–SW4 | Phase Current Balance Inputs | Monitor switch-node voltages for per-phase current balancing and thermal management |
| CSREF / CSSUM / CSCOMP | Current Sense Amplifier Terminals | CSREF = reference node; CSSUM = summing point for inductor currents; CSCOMP = compensation node for gain/slope |
| RT / RAMPADJ / ILIMIT / DELAY | Configuration & Protection Inputs | RT sets oscillator freq; RAMPADJ adjusts PWM ramp slope; ILIMIT sets current limit threshold; DELAY configures soft-start and fault delay |
Key Features
| Feature | Design Value |
|---|---|
| 6-bit VID DAC with Intel VRM 10 compliance | Enables precise, dynamic CPU voltage scaling from 0.8375 V to 1.6 V without external DAC |
| Active current balancing across all phases | Maintains ≤5% inter-phase current mismatch under transient and steady-state loads |
| Programmable short-circuit protection with latch-off delay | Configurable delay (e.g., 600 µs) prevents nuisance tripping during startup or transients |
| Differential remote sensing (FB/FBRTN) | Compensates for PCB IR drop, ensuring regulation accuracy at CPU die rather than PSU output |
| On-the-fly VID code change support | Power Good and crowbar blanking accommodate real-time voltage adjustments requested by CPU |
| Adjustable output droop resistance | Programmable load-line via CSCOMP feedback enables optimal transient response per Intel specification |
Applications
| Desktop VRM Module | Intel Processor Core Supply |
|---|---|
Use Scenario: Regulating core voltage for LGA775 and later Intel Pentium 4, Core 2, and early Core i-series CPUs in ATX desktop motherboards. IC Role / Device Role / Timing Role: Primary multiphase buck controller managing up to four synchronous buck stages, coordinating phase interleaving and current sharing. Use Value: Enables <10 mV regulation error at CPU VSENSE point while supporting >100 A total output current with low thermal stress on MOSFETs and inductors. |
Use Scenario: Providing dynamically scaled core voltage in OEM desktop systems requiring VRM 10.1/11 compliance and fast VID transitions. IC Role / Device Role / Timing Role: Voltage identification decoder and PWM timing generator with integrated current sensing and protection logic. Use Value: Eliminates need for external DAC and discrete current-sense amplifiers, reducing BOM count and layout complexity in space-constrained VRM designs. |
| High-Current CPU Power Stage | Multi-Phase Buck Reference Design |
Use Scenario: Building scalable 2-/3-/4-phase power stages for workstation-class processors demanding >150 A peak current and tight transient response. IC Role / Device Role / Timing Role: Controller IC providing phase-interleaved PWM signals, per-phase current monitoring, and coordinated soft-start/crowbar protection. Use Value: Reduces output ripple by up to 75% vs. single-phase design and distributes thermal load across multiple MOSFETs and chokes. |
Use Scenario: Serving as baseline controller in Analog Devices' ADP3168 evaluation platforms (e.g., ADP3168-EVALZ) for VRM validation and layout optimization. IC Role / Device Role / Timing Role: Reference-grade multiphase controller demonstrating Intel-compliant VID decoding, droop programming, and current-balancing calibration. Use Value: Accelerates time-to-test for motherboard designers by providing verified component values, layout guidelines, and thermal derating data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6322IRZ-T | 8-phase capable; integrated MOSFET drivers; requires external VID DAC for non-Intel modes | Better suited for server-class 8-phase VR11/12 designs; higher pin count (40-QFN) | Choose ISL6322IRZ-T when scaling beyond 4 phases or integrating driver functionality on-die. |
| TPS51220ARGER | Single-chip 3-phase solution with integrated drivers; no external VID DAC needed; lower quiescent current (3 mA) | Targeted at mobile/embedded Intel Atom/Celeron platforms; lacks SWx inputs for per-phase thermal tuning | Choose TPS51220ARGER for cost-sensitive, space-constrained client platforms where full 4-phase scalability is unnecessary. |
Compared with ISL6322IRZ-T and TPS51220ARGER, ADP3168JRUZ-REEL-AD offers superior flexibility in phase configuration (2/3/4 via pin strapping), dedicated SWx inputs for thermal balancing, and tighter ±10 mV sensing accuracy - making it optimal for high-performance desktop VRMs requiring field-tunable current distribution and Intel VRM 10 compliance.
Availability
ADP3168JRUZ-REEL-AD is available at Aetrix Electronics and suitable for desktop PC power supplies, VRM modules, and Intel processor core supply designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADP3168JRUZ-REEL-AD 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 ADP3168JRUZ-REEL-AD belongs to Analog Devices' power management controller product line, designed specifically for high-efficiency, multi-phase DC/DC conversion in Intel-compatible CPU core voltage regulation systems.
FAQ
What is the operating temperature range for the ADP3168JRUZ-REEL-AD?
The ADP3168JRUZ-REEL-AD is specified for commercial operation from 0°C to +85°C ambient temperature. Its junction temperature must not exceed 125°C under normal operation, and thermal design must account for θJA = 100°C/W. This range aligns with standard desktop motherboard environments where airflow and heatsinking ensure reliable performance of the ADP3168JRUZ-REEL-AD.
How does the ADP3168JRUZ-REEL-AD configure 2-phase vs. 3-phase operation?
The ADP3168JRUZ-REEL-AD detects phase count during startup by monitoring PWM3 and PWM4 pin voltages. Grounding PWM4 disables Phase 4 (enabling 3-phase). Grounding both PWM3 and PWM4 disables Phases 3 and 4 (enabling 2-phase). The detection occurs within the first two oscillator cycles; after initialization, PWM outputs switch between 0 V and 5 V. This configuration method is implemented directly in the ADP3168JRUZ-REEL-AD's internal logic without requiring register writes or external configuration ICs.
Can the ADP3168JRUZ-REEL-AD support remote differential sensing without additional components?
Yes - the ADP3168JRUZ-REEL-AD natively supports remote differential sensing using its dedicated FB and FBRTN pins. FB connects to the CPU's VSENSE point via a resistor, while FBRTN connects directly to the CPU's VSENSE ground. The internal VID DAC and error amplifier are referenced to FBRTN, which draws only 90–120 µA, minimizing IR drop error. No external instrumentation amplifiers or level-shifting circuitry are required for this function in the ADP3168JRUZ-REEL-AD.
What is the purpose of the SW1–SW4 pins on the ADP3168JRUZ-REEL-AD?
The SW1–SW4 pins on the ADP3168JRUZ-REEL-AD serve as per-phase current balance inputs. They monitor switch-node voltages to enable active current balancing across phases, improving thermal distribution and transient response. External resistors (RSW1–RSW4) can be added in series with each SW pin to intentionally skew current sharing - for example, increasing RSW on cooler phases to direct more current there. This thermal balancing capability is unique to the ADP3168JRUZ-REEL-AD among Intel VRM 10 controllers.
Does the ADP3168JRUZ-REEL-AD include built-in short-circuit protection?
Yes - the ADP3168JRUZ-REEL-AD features programmable short-circuit protection with adjustable latch-off delay. The ILIMIT pin sets the current-limit threshold (e.g., 125 mV typical), and the DELAY pin configures the latch-off time (e.g., 600 µs with 250 kΩ/4.7 nF). Upon overcurrent, the ADP3168JRUZ-REEL-AD asserts crowbar to force PWM outputs low and holds shutdown until reset via EN or UVLO cycling - preventing damage during sustained faults.
ADP3168JRUZ-REEL-AD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- ADP3168
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- Controller, Intel VRM
- Voltage - Input:
- 12V
- Number of Outputs:
- 4
- Voltage - Output:
- 0.5V ~ 3.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP
ADP3168JRUZ-REEL-AD FAQ
1.How can I place an order for ADP3168JRUZ-REEL-AD through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3168JRUZ-REEL-AD 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 ADP3168JRUZ-REEL-AD reliable?
The price and inventory of ADP3168JRUZ-REEL-AD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3168JRUZ-REEL-AD is usually 5 days.
3.What payment methods are accepted for ADP3168JRUZ-REEL-AD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3168JRUZ-REEL-AD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3168JRUZ-REEL-AD?
ADP3168JRUZ-REEL-AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3168JRUZ-REEL-AD 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 ADP3168JRUZ-REEL-AD?
For technical support, including ADP3168JRUZ-REEL-AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3168JRUZ-REEL-AD requirements.
6.How does Aetrix verify that ADP3168JRUZ-REEL-AD is sourced from the original manufacturer or authorized distributors?
All ADP3168JRUZ-REEL-AD 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 ADP3168JRUZ-REEL-AD meets industry standards.
7.What is the process for return or replacement of ADP3168JRUZ-REEL-AD?
All ADP3168JRUZ-REEL-AD units undergo pre-shipment inspection (PSI). If there is an issue with ADP3168JRUZ-REEL-AD, 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 ADP3168JRUZ-REEL-AD part is unused and in its original packaging.
Return procedure for ADP3168JRUZ-REEL-AD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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