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Analog Devices Inc. ADP3167JR-REEL7
- Part No.:
- ADP3167JR-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP3167JR-REEL7.pdf
- Description:
- SYNCHRONOUS BUCK CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:13,000
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Product details
Overview
ADP3167JR-REEL7 from Analog Devices is a 5-bit programmable, 2-phase synchronous buck controller optimized for 5 V input-to-core-voltage conversion in high-performance CPU power supplies. It delivers 1.1 V–1.85 V output with ±0.8% total accuracy over temperature, active current balancing between phases, and integrated crowbar overvoltage protection - enabling VRM 9.0-compliant designs for AMD Athlon™ and Intel Pentium® 4 processors.
For engineers reviewing the ADP3167JR-REEL7 datasheet, ADP3167JR-REEL7 pinout, ADP3167JR-REEL7 application, or ADP3167JR-REEL7 equivalent, this page provides verified technical context, real-world design meaning of key specs, SOIC-16 package mapping, functional alternatives with documented differences, and supply-chain support details specific to volume production of desktop PC VRM modules.
Technical Context
The ADP3167JR-REEL7 implements current-mode PWM control with antiphase logic outputs (PWM1/PWM2), where each phase operates at half the oscillator frequency set by the CT pin. Its internal 5-bit DAC reads VID codes to program output voltage, while ADOPT™ technology dynamically adjusts regulation point based on load current to minimize output capacitor count.
It features high-side current sensing via CS+/CS– pins for precise per-phase current monitoring, active current sharing that maintains equal load division even under large transients, and dual-level protection: cycle-by-cycle current limiting plus crowbar-triggered shutdown when output exceeds 114–134% nominal. The COMP pin serves as both error amplifier output and disable input (threshold: 640–880 mV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 1.1 V to 1.85 V, digitally programmed via 5-bit VID code - supports full VRM 9.0 compliance for Pentium 4/Athlon core supplies. |
| Total Output Accuracy | ±0.8% over 0°C to 70°C - ensures stable microprocessor core voltage within tight tolerance bands during thermal cycling. |
| Current Sense Threshold | 69–89 mV (ADP3167) - lower threshold vs. ADP3160 enables optimized operation from 5 V input with reduced sense resistor power loss. |
| Oscillator Frequency | 430–570 kHz (typ. 500 kHz at CT = 91 pF) - sets 215–285 kHz per-phase switching, balancing efficiency and filter component size. |
| Crowbar Trip Threshold | 114–134% of nominal output - triggers immediate PWM shutdown to protect CPU from destructive overvoltage events. |
| Power Good Threshold | 76–88% (UV), 114–134% (OV) of nominal - provides reliable system boot sequencing and fault detection without external comparators. |
| Package | 16-lead narrow-body SOIC (R-16A) - industry-standard footprint compatible with automated PCB assembly and thermal management on 2-layer boards (θJA = 125°C/W). |
Pinout & Package
ADP3167JR-REEL7 is housed in a 16-lead narrow-body SOIC package (R-16A), with GND referenced to Pin 9 and VCC supplied at Pin 16. All VID inputs (Pins 1–5) are internally pulled up; leaving them open places the device in "No CPU" mode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID4–VID0 (Pins 1–5) | Voltage Identification DAC inputs | Set regulated output voltage (1.1–1.85 V) via 5-bit binary code; open = logic high due to internal pull-up. |
| COMP (Pin 6) | Error amplifier output & disable input | Drives external compensation network; pulling below 640–880 mV disables PWM outputs while preserving REF. |
| FB (Pin 7) | Remote feedback input | Enables Kelvin sensing at CPU VCC pad - requires GND connection near load for ±0.8% accuracy. |
| CT (Pin 8) | Oscillator timing capacitor node | External capacitor (e.g., 150 pF NPO) sets switching frequency; 500 kHz CT freq → 250 kHz per phase. |
| GND (Pin 9) | Analog/digital ground reference | Common return for all internal circuits; must be connected near load ground for remote sensing integrity. |
| PWRGD (Pin 10) | Open-drain power-good indicator | Sinks current when output is within 76–88% (UV) and 114–134% (OV) of nominal - used for system enable sequencing. |
| CS+ / CS– (Pins 11, 14) | High-side current sense differential inputs | Monitor combined phase currents through single sense resistor; enables accurate active current balancing. |
| PWM1 / PWM2 (Pins 12–13) | Logic-level antiphase gate drive outputs | Drive external high-current drivers (e.g., ADP3414); 180° out-of-phase operation reduces output ripple by ~70%. |
| REF (Pin 15) | 3.0 V precision reference output | Stable 3.0 V ±1.6% source for voltage positioning divider or auxiliary circuitry; max 300 mA load. |
| VCC (Pin 16) | Main supply input | Accepts 5 V or 12 V input; UVLO activates at 5.9–6.9 V with 0.1–0.6 V hysteresis to prevent brownout oscillation. |
Key Features
| Feature | Design Value |
|---|---|
| ADOPT™ Optimal Positioning Technology | Actively adjusts output voltage vs. load current to maintain optimal transient response - reduces required output capacitance by ≥35% vs. passive positioning. |
| Active Current Balancing | Equalizes phase currents in real time using shared CS+ / CS– sensing - eliminates need for matched MOSFET RDS(ON) or inductor DCR calibration. |
| Dual Logic-Level PWM Outputs | 180° out-of-phase, 50% max duty cycle per phase - enables compact 2-phase buck topology with minimized input/output ripple and thermal stress. |
| Integrated Crowbar Protection | Hardware-level overvoltage shutdown (300 ns response) - protects CPU without external components or delay penalties. |
| VRM 9.0 Compliance | Meets Intel's core voltage accuracy, transient response, and sequencing requirements - validated for Pentium 4 and Athlon platforms. |
Applications
| Desktop CPU Core Supply | VRM 9.0 Module |
|---|---|
Use Scenario: Power delivery for AMD Athlon™ processors requiring 1.1–1.85 V core voltage with fast load transients up to 50 A/µs. IC Role / Device Role / Timing Role: Primary 2-phase synchronous buck controller managing VID decoding, current balancing, and crowbar safety. Use Value: Enables single-chip VRM solution meeting VRM 9.0 spec with ≤9 Rubycon MBZ capacitors instead of 14 - reducing BOM cost and board area. |
Use Scenario: Integrated voltage regulator module for OEM motherboard designs targeting Intel Pentium® 4 platforms. IC Role / Device Role / Timing Role: Central controller coordinating dual-phase gate drivers, remote sensing, and PWRGD signaling for BIOS handoff. Use Value: Delivers ±0.8% output accuracy across 0°C–70°C ambient - eliminates need for post-manufacturing calibration or trim resistors. |
| High-Current Embedded CPU Supply | Industrial Workstation PSU |
Use Scenario: Core power for embedded x86 processors in ruggedized industrial PCs operating under wide thermal swings. IC Role / Device Role / Timing Role: Fault-tolerant buck controller with short-circuit foldback and crowbar override - prevents latch-up during ESD or surge events. Use Value: Maintains regulation stability with <130 mV static tolerance even with ±2% current sense resistor variation - simplifies sourcing. |
Use Scenario: High-reliability workstation power supply supporting multi-core CPUs with dynamic voltage scaling. IC Role / Device Role / Timing Role: Programmable controller interfacing with system management controller via VID bus for adaptive voltage control. Use Value: Supports 25 discrete VID codes (Table I) - allows firmware-controlled voltage steps (e.g., 1.600 V → 1.550 V) without hardware change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2-phase synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP3160JR-REEL7 | Optimized for 12 V input; higher current sense threshold (142–172 mV) and lower COMP disable threshold (560–800 mV). | Targeted at 12 V main rail systems; requires larger sense resistor for same current limit vs. ADP3167. | Select when primary input is 12 V and higher current-sense headroom is needed for low-RDS(ON) MOSFETs. |
| ISL6322IRZ-T | 6-phase capable, integrated MOSFET drivers, 0.5% output accuracy; no internal VID DAC - requires external DAC or SMBus interface. | Supports higher current (>100 A) and newer VRM specs (e.g., VRM 11.x); lacks native crowbar protection. | Choose for future-proof scalability beyond 53.4 A or when integrating driver + controller reduces layout complexity. |
Compared with ADP3167JR-REEL7, ADP3160JR-REEL7 offers better 12 V input compatibility but less efficient 5 V operation, while ISL6322IRZ-T provides greater phase count and accuracy at the cost of external interface complexity and missing crowbar hardware safety.
Availability
ADP3167JR-REEL7 is available at Aetrix Electronics and suitable for desktop PC motherboards, VRM 9.0 modules, and industrial embedded CPU supplies requiring stable component supply, long-lifecycle support, and traceable sourcing for production programs.
Supply support for ADP3167JR-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 ISO 9001-certified manufacturing.
The ADP3167JR-REEL7 belongs to Analog Devices' CPU power management controller product line, engineered specifically for high-efficiency, low-noise, multi-phase core voltage regulation in x86-based computing platforms.
FAQ
What is the primary input voltage range supported by the ADP3167JR-REEL7?
The ADP3167JR-REEL7 is specifically designed for 5 V main supply operation, distinguishing it from the ADP3160JR-REEL7 which targets 12 V inputs. Its current sense threshold (69–89 mV) and internal architecture are optimized to deliver high efficiency and accurate regulation when converting 5 V to processor core voltages between 1.1 V and 1.85 V. This makes ADP3167JR-REEL7 ideal for compact VRM designs where 5 V rail availability simplifies power architecture.
How does the ADP3167JR-REEL7 implement active current balancing between its two phases?
The ADP3167JR-REEL7 achieves active current balancing by using a single high-side current sense resistor shared between both phases and monitoring the differential voltage across CS+ and CS– pins. During each phase's ON-time, the same internal current comparator compares sensed current against a threshold set by the COMP voltage - ensuring identical current limits and dynamic adjustment per phase. This eliminates reliance on matched MOSFETs or inductors, maintaining balance even under large transient loads, as confirmed in the Functional Block Diagram and Theory of Operation section.
Can the ADP3167JR-REEL7 operate without a connected CPU or VID signals?
Yes - the ADP3167JR-REEL7 enters a defined "No CPU" mode when all five VID inputs (VID4–VID0) are left open, causing internal pull-ups to assert logic high on each pin. In this state, the device shuts off PWM1 and PWM2 outputs while maintaining REF and other bias functions. This behavior is explicitly documented in the PIN FUNCTION DESCRIPTIONS section and Table I, providing safe default operation during system initialization or CPU absence.
What protection features does the ADP3167JR-REEL7 provide against overvoltage conditions?
The ADP3167JR-REEL7 integrates dedicated crowbar protection that triggers when output voltage exceeds 114–134% of nominal (VCROWBAR), forcing both PWM outputs low within 300 ns. This rapidly engages low-side MOSFETs to sink inductor energy and collapse the output. Unlike standard OVP, this hardware-level action requires no loop response time and operates independently of the control loop - a key safety feature explicitly detailed in the GENERAL DESCRIPTION and THEORY OF OPERATION sections.
Is the ADP3167JR-REEL7 pin-compatible with the ADP3160JR-REEL7?
Yes - both ADP3167JR-REEL7 and ADP3160JR-REEL7 use identical 16-lead narrow-body SOIC packaging (R-16A) and share identical pinout, function mapping, and absolute maximum ratings. They differ only in internal calibration (e.g., current sense threshold, COMP disable voltage) and recommended input voltage (5 V vs. 12 V), making them drop-in replacements at the PCB level when thermal and electrical design margins permit.
ADP3167JR-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- Controller, High Performance Processor
- Voltage - Input:
- 12V
- Number of Outputs:
- 5
- Voltage - Output:
- 1.1V ~ 1.85V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ADP3167JR-REEL7 FAQ
1.How can I place an order for ADP3167JR-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3167JR-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 ADP3167JR-REEL7 reliable?
The price and inventory of ADP3167JR-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3167JR-REEL7 is usually 5 days.
3.What payment methods are accepted for ADP3167JR-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3167JR-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3167JR-REEL7?
ADP3167JR-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3167JR-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 ADP3167JR-REEL7?
For technical support, including ADP3167JR-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3167JR-REEL7 requirements.
6.How does Aetrix verify that ADP3167JR-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADP3167JR-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 ADP3167JR-REEL7 meets industry standards.
7.What is the process for return or replacement of ADP3167JR-REEL7?
All ADP3167JR-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADP3167JR-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 ADP3167JR-REEL7 part is unused and in its original packaging.
Return procedure for ADP3167JR-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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