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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Analog Devices Inc. ADP3168JRU-REEL7

Name: ADP3168JRU-REEL7
Brand: Analog Devices Inc.
SKU: ADP3168JRU-REEL7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADP3168JRU-REEL7

Manufacturer:: Analog Devices Inc.

Category:: Special Purpose Regulators

Package:: 28-TSSOP (0.173", 4.40mm Width)

Datasheet:: ADP3168JRU-REEL7.pdf

Description:: SYNCHRONOUS BUCK CONTROLLER

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Product details

Overview

ADP3168JRU-REEL7 from Analog Devices is a 6-bit programmable, multiphase synchronous buck controller optimized for Intel® processor core voltage regulation. It supports selectable 2-, 3-, or 4-phase operation up to 1 MHz per phase, delivers ±10 mV worst-case differential sensing error over temperature, and provides logic-level PWM outputs for external high-power MOSFET drivers - deployed in VRM modules for desktop PC power supplies.

For engineers reviewing the ADP3168JRU-REEL7 datasheet, ADP3168JRU-REEL7 pinout, ADP3168JRU-REEL7 application, or ADP3168JRU-REEL7 equivalent, key selection criteria include VID-programmable output (0.8375 V–1.6 V), active current balancing across phases, programmable short-circuit protection with latch-off delay, and TSSOP-28 package compatibility with Intel VRM 10 specifications.

Technical Context

The ADP3168JRU-REEL7 implements a multimode fixed-frequency PWM architecture with an internal 6-bit VID DAC compliant with Intel VRD/VRM 10 standards. 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, then divided by active phase count.

It integrates differential remote sensing (FB/FBRTN), a dedicated current-sense amplifier (CSREF/CSSUM/CSCOMP) with programmable gain for load-line positioning, and independent current-balance circuitry monitoring SW1–SW4 nodes to equalize phase currents under transient and thermal imbalance conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage Range	0.8375 V to 1.6 V, digitally set via 6-bit VID code per Intel VRM 10; enables precise CPU core voltage tracking.
Phase Configuration	Selectable 2-, 3-, or 4-phase operation; configured by grounding PWM3/PWM4 pins - no reprogramming required.
Max Switching Frequency	1 MHz per phase; achieved with RT = 75 kΩ in 4-phase mode - balances VR size, efficiency, and transient response.
Differential Sensing Error	±10 mV worst-case over 0°C to 85°C; ensures stable regulation under thermal drift and layout-induced noise.
Current Limit Threshold	105–145 mV (typ. 125 mV) at CSREF–CSCOMP; set by ILIMIT resistor - enables accurate overcurrent detection independent of MOSFET R_DS(on).
Power Good Delay	100–250 µs during VID changes; accommodates on-the-fly voltage transitions requested by CPU without false fault triggering.
UVLO Threshold	6.5–7.3 V (rising); prevents erratic startup or shutdown during 12 V rail instability in desktop power systems.

Pinout & Package

ADP3168JRU-REEL7 is housed in a 28-lead TSSOP package (JEDEC MO-153, 4.4 mm × 9.7 mm), lead-free and RoHS-compliant. Pin pitch is 0.65 mm; exposed pad optional for thermal enhancement.

Pin/Terminal	Circuit Role	Design Meaning
VID0–VID5	Voltage ID DAC Inputs	6-bit parallel interface reading CPU VID code; open-circuit = logic high; sets nominal output voltage per Table 4.
FB / FBRTN	Differential Feedback Inputs	Remote sense pair referenced to processor V_SENSE/V_SENSEGND; enables accurate regulation despite PCB IR drop.
PWM1–PWM4	Logic-Level Gate Drive Outputs	0–5 V push-pull outputs driving external drivers (e.g., ADP3418); grounding PWM3/PWM4 disables corresponding phases.
SW1–SW4	Phase Current Balance Inputs	Monitor switch-node voltages to enable per-phase current balancing - critical for thermal derating and transient current sharing.
CSREF / CSSUM / CSCOMP	Current Sense Amplifier Interface	CSREF = reference node (tied to inductor common point); CSSUM = summing node for phase currents; CSCOMP = compensation/gain node for load line.
ILIMIT	Current Limit Set Point	Resistor-to-GND sets threshold voltage (10.4 mV/µA ratio); also signals driver IC shutdown when EN is low or UVLO active.

Key Features

Feature	Design Value
Active Current Balancing	Real-time per-phase current matching via SW1–SW4 inputs and internal ramp comparator - maintains ≤5% inter-phase current deviation under load transients.
Programmable Short-Circuit Protection	Latch-off delay adjustable via external R_DELAY/C_DELAY; prevents nuisance tripping during inrush while ensuring fast fault isolation.
On-the-Fly VID Support	400 ns VID transition delay to FB change; enables seamless dynamic voltage scaling (DVS) during CPU P-state transitions without PWRGD glitch.
Active Voltage Positioning	Load-line droop implemented via CSCOMP signal subtracted from VID DAC reference - maintains optimal V_OUT vs. I_LOAD for transient headroom.
Multi-Mode PWM Architecture	Fixed-frequency control with programmable ramp slope (RAMPADJ) and soft-start (DELAY) - decouples loop stability tuning from switching frequency selection.

Applications

Desktop VRM Module	Intel Processor Core Supply
Use Scenario: Regulating 0.8375 V–1.6 V core voltage for Intel Pentium 4 and later 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 compliance with Intel VRM 10 spec, including ±10 mV sensing accuracy and <250 µs PWRGD delay during VID changes - essential for stable CPU operation.	Use Scenario: Delivering >100 A DC output with <10 mV ripple in space-constrained motherboard VRMs. IC Role / Device Role / Timing Role: Synchronous buck controller generating phase-shifted PWM signals with 90° (4-phase), 120° (3-phase), or 180° (2-phase) offsets to minimize input/output ripple. Use Value: Reduces RMS input current and output voltage ripple by up to 75% vs. single-phase design - lowers capacitor count and improves EMI performance.
High-Efficiency CPU Power Stage	Thermally Balanced Multiphase Converter
Use Scenario: High-efficiency core supply where thermal management dictates distributed power delivery across multiple phases. IC Role / Device Role / Timing Role: Controller implementing active impedance control mode using CSCOMP feedback to adjust output voltage droop proportional to load current. Use Value: Maintains optimal V_OUT positioning during load steps - improves transient response margin and reduces required output capacitance.	Use Scenario: Systems requiring long-term reliability under uneven thermal loading (e.g., asymmetric heatsink placement). IC Role / Device Role / Timing Role: Phase current balancer using SW1–SW4 inputs and internal current-balance circuit to dynamically correct inter-phase current mismatch. Use Value: Prevents thermal runaway in individual phases by equalizing conduction losses - extends MOSFET lifetime and enables higher sustained current density.

Desktop VRM Module

Intel Processor Core Supply

Use Scenario: Regulating 0.8375 V–1.6 V core voltage for Intel Pentium 4 and later 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 compliance with Intel VRM 10 spec, including ±10 mV sensing accuracy and <250 µs PWRGD delay during VID changes - essential for stable CPU operation.

Use Scenario: Delivering >100 A DC output with <10 mV ripple in space-constrained motherboard VRMs.

IC Role / Device Role / Timing Role: Synchronous buck controller generating phase-shifted PWM signals with 90° (4-phase), 120° (3-phase), or 180° (2-phase) offsets to minimize input/output ripple.

Use Value: Reduces RMS input current and output voltage ripple by up to 75% vs. single-phase design - lowers capacitor count and improves EMI performance.

High-Efficiency CPU Power Stage

Thermally Balanced Multiphase Converter

Use Scenario: High-efficiency core supply where thermal management dictates distributed power delivery across multiple phases.

IC Role / Device Role / Timing Role: Controller implementing active impedance control mode using CSCOMP feedback to adjust output voltage droop proportional to load current.

Use Value: Maintains optimal V_OUT positioning during load steps - improves transient response margin and reduces required output capacitance.

Use Scenario: Systems requiring long-term reliability under uneven thermal loading (e.g., asymmetric heatsink placement).

IC Role / Device Role / Timing Role: Phase current balancer using SW1–SW4 inputs and internal current-balance circuit to dynamically correct inter-phase current mismatch.

Use Value: Prevents thermal runaway in individual phases by equalizing conduction losses - extends MOSFET lifetime and enables higher sustained current density.

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	6-bit VID, 2-/3-/4-phase, but uses analog current-mode control; lacks digital programmability of ADP3168JRU-REEL7's ramp adjustment and active positioning.	Targeted at legacy VRM 9.x designs; less optimized for Intel VRM 10 dynamic VID transitions and tighter sensing tolerance.	Preferred when migrating older designs with existing ISL63xx layout; requires recalibration of current-sense gain and soft-start timing.
TPS51220ARGER	Supports 3-/4-phase only; integrated MOSFET drivers; no separate SWx inputs for per-phase current monitoring - limits thermal balancing capability.	Designed for compact notebook VRMs; lacks TSSOP-28 footprint and discrete driver interface needed for high-current desktop VRMs.	Consider only for space-constrained, lower-current (<60 A) applications where integrated drivers reduce BOM count - not drop-in compatible.

Compared with ISL6322IRZ and TPS51220ARGER, ADP3168JRU-REEL7 uniquely combines Intel VRM 10–compliant VID decoding, discrete SWx-based current balancing, and fully programmable load-line positioning - making it the only option supporting thermally adaptive, high-current desktop VRMs with field-upgradable phase count.

Availability

ADP3168JRU-REEL7 is available at Aetrix Electronics and suitable for desktop motherboard VRMs, Intel processor core supplies, and high-current multiphase DC-DC converters requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for ADP3168JRU-REEL7 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, with design centers worldwide and a focus on precision power, signal chain, and RF technologies.

The ADP3168JRU-REEL7 belongs to Analog Devices' CPU power management product line, engineered specifically for high-efficiency, multi-phase core voltage regulation in Intel-based computing platforms - emphasizing accuracy, thermal resilience, and VRM specification compliance.

FAQ

What is the operating temperature range for the ADP3168JRU-REEL7?

The ADP3168JRU-REEL7 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 - maintains guaranteed performance across this full range, with ±10 mV differential sensing error and stable phase balancing behavior confirmed per Rev. B datasheet testing.

How does the ADP3168JRU-REEL7 configure 2-phase vs. 3-phase operation?

The ADP3168JRU-REEL7 detects phase count during initial oscillator cycles: grounding PWM4 disables Phase 4 (enabling 3-phase), while grounding both PWM3 and PWM4 disables Phases 3 and 4 (enabling 2-phase). The internal 5 kΩ pull-down detection circuitry ensures reliable recognition before normal PWM output begins - no firmware or register writes are required.

Can the ADP3168JRU-REEL7 be used with non-Intel processors?

The ADP3168JRU-REEL7's 6-bit VID interface and VRM 10–compliant DAC output (0.8375 V–1.6 V) are designed explicitly for Intel processors. While the core control architecture is functional with other VID sources, unsupported VID codes or nonstandard timing (e.g., AMD PSO) may result in incorrect output voltage or PWRGD assertion - use only with Intel-compatible CPUs per datasheet guidance.

What external components define the ADP3168JRU-REEL7's switching frequency?

The ADP3168JRU-REEL7's master clock frequency is set by an external resistor (RT) from Pin 13 to GND, with values from 75 kΩ (600 kHz) to 250 kΩ (200 kHz) in 4-phase mode. The per-phase frequency equals f_OSC ÷ number of active phases - so RT = 115 kΩ yields ~400 kHz per phase in 4-phase, or ~571 kHz in 3-phase operation.

Does the ADP3168JRU-REEL7 integrate MOSFET drivers?

No, the ADP3168JRU-REEL7 provides logic-level PWM outputs (PWM1–PWM4) intended to drive external high-current gate drivers such as the ADP3418 or compatible devices. It does not include integrated power MOSFETs or driver stages - this separation enables scalable power stage design, thermal optimization, and independent selection of driver strength and dead-time control.

ADP3168JRU-REEL7 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

ADP3168JRU-REEL7 FAQ

1.How can I place an order for ADP3168JRU-REEL7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADP3168JRU-REEL7 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 ADP3168JRU-REEL7 reliable?

The price and inventory of ADP3168JRU-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3168JRU-REEL7 is usually 5 days.

3.What payment methods are accepted for ADP3168JRU-REEL7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3168JRU-REEL7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADP3168JRU-REEL7?

ADP3168JRU-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADP3168JRU-REEL7 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 ADP3168JRU-REEL7?

For technical support, including ADP3168JRU-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3168JRU-REEL7 requirements.

6.How does Aetrix verify that ADP3168JRU-REEL7 is sourced from the original manufacturer or authorized distributors?

All ADP3168JRU-REEL7 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 ADP3168JRU-REEL7 meets industry standards.

7.What is the process for return or replacement of ADP3168JRU-REEL7?

All ADP3168JRU-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP3168JRU-REEL7, 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 ADP3168JRU-REEL7 part is unused and in its original packaging.

Return procedure for ADP3168JRU-REEL7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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