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Analog Devices Inc. ADP3162JRZ
- Part No.:
- ADP3162JRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP3162JRZ.pdf
- Description:
- SYNCHRONOUS BUCK CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:5,581
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Product details
Overview
ADP3162JRZ from Analog Devices is a 5-bit programmable, dual-phase synchronous buck controller for high-performance CPU core voltage regulation. It implements ADOPT™ active voltage positioning, delivers ±0.8% output accuracy over temperature, supports 1.05 V to 1.825 V VID-programmed output, and drives external logic-level MOSFET drivers in antiphase at up to 2 MHz oscillator frequency (1 MHz per phase) for Intel Tualatin processor power supplies.
For engineers reviewing the ADP3162JRZ datasheet, ADP3162JRZ pinout, ADP3162JRZ application, or ADP3162JRZ equivalent, this page provides verified technical context, real-world VRM 8.5 compliance data, confirmed current-mode control behavior, validated 16-pin SOIC package mapping, and two field-validated alternative controllers with documented functional trade-offs.
Technical Context
The ADP3162JRZ uses a fixed-frequency current-mode PWM architecture with dual antiphase logic outputs (PWM1/PWM2), where each phase operates at half the CT-set oscillator frequency. Its internal 5-bit DAC reads VID0–VID3 and VID25 to set the FB regulation reference between 1.05 V and 1.825 V with 25 mV steps.
It integrates active current balancing via high-side current sensing across a single sense resistor (CS+/CS−), employs ADOPT™ for load-dependent output voltage positioning, and features crowbar overvoltage protection that forces both PWM outputs low when VCROWBAR exceeds 114–134% of nominal DAC voltage - all without requiring external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 1.05 V to 1.825 V, digitally set by 5-bit VID code (25 mV step resolution) |
| Output Accuracy | ±0.8% over 0°C to 70°C - ensures VRM 8.5 compliance under thermal stress |
| Oscillator Frequency | 430–570 kHz typical (CT = 91 pF); max 2 MHz - sets per-phase switching at ≤1 MHz |
| Crowbar Threshold | 114–134% of nominal DAC voltage - triggers immediate PWM shutdown on overvoltage |
| Current Sense Threshold | 69–89 mV - defines peak inductor current limit for short-circuit protection |
| Power-Good Window | 76–88% (UV) and 114–134% (OV) of nominal output - enables precise rail monitoring |
| Reference Output | 3.0 V ±1.6% (2.952–3.048 V), 300 µA max - used for ADOPT resistor divider and external biasing |
Pinout & Package
ADP3162JRZ is housed in a 16-lead narrow-body SOIC (R-16A / SO-16) package with standard 1.27 mm pitch and 10.2 mm × 7.5 mm footprint. Thermal resistance θJA is 125°C/W (two-layer board) or 81°C/W (four-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID3, VID25 | Voltage ID input bits | 5-bit bus pulled up internally to REF; sets DAC output voltage (1.05–1.825 V) per Table I |
| FB | Feedback input | Remote-sense node for error amplifier; referenced to GND near load for accuracy |
| COMP | Error amplifier output | Compensation point and ADOPT voltage positioning node; drives current comparator threshold |
| CT | Oscillator timing node | Connects to ground via external capacitor (e.g., 150 pF for 400 kHz oscillator) |
| PWM1 / PWM2 | Logic-level phase drivers | Antiphase outputs (180° offset); drive external high-power drivers (e.g., ADP3412/ADP3413) |
| CS+ / CS− | High-side current sense inputs | Differential pair measuring voltage across single sense resistor for active current balancing |
| PWRGD | Open-drain power-good signal | Asserts high (with external pull-up) only when output is within ±12% to ±24% window of VID-set voltage |
| REF | 3.0 V reference output | Bypassed with 1 nF capacitor; supplies ≤300 µA for ADOPT divider and auxiliary bias |
| VCC / GND | Supply and ground | VCC accepts 5 V or 12 V input; UVLO activates below 5.9–6.9 V with 0.1–0.6 V hysteresis |
Key Features
| Feature | Design Value |
|---|---|
| ADOPT™ Active Voltage Positioning | Adjusts output voltage dynamically with load current to minimize required output capacitance and optimize transient response for Tualatin CPUs |
| Active Current Balancing | Equalizes phase currents using shared high-side sense resistor - eliminates mismatch from MOSFET RDS(ON) or inductor DCR variations |
| Integrated Crowbar Protection | Hardware-level overvoltage shutdown (no delay >300 ns) that pulls both PWM outputs low to protect microprocessor during high-side MOSFET failure |
| VRM 8.5 Compliance | Meets Intel's full specification including output accuracy (±0.8%), load-line slope (3.2 mΩ), and no-load offset - with minimal external components |
| Dual Antiphase Logic Outputs | 180° out-of-phase PWM1/PWM2 signals reduce input/output ripple by interleaving; duty cycle inherently limited to ≤50% per phase |
Applications
| Desktop CPU Core Supply | VRM 8.5 Module |
|---|---|
Use Scenario: Regulating core voltage for Intel Tualatin processors in desktop PCs with 28 A maximum load and strict ±12% PWRGD window. IC Role / Device Role / Timing Role: Primary 2-phase synchronous buck controller; reads VID code, generates antiphase PWMs, enforces VRM 8.5 load line via ADOPT. Use Value: Enables single-chip compliance with Intel VRM 8.5 using only one current sense resistor and no external crowbar circuitry. | Use Scenario: Building compact, cost-optimized voltage regulator modules for OEM motherboard designs targeting Tualatin-based systems. IC Role / Device Role / Timing Role: Central controller managing dual-phase power stage timing, current sharing, and power-good signaling per VRM spec. Use Value: Reduces BOM count by integrating reference, crowbar, PWRGD, and VID decoding - lowering total system cost vs. discrete solutions. |
| High-Current Embedded CPU Supply | Legacy x86 Processor Power |
Use Scenario: Delivering stable 1.5 V @ 23 A to Pentium III-class embedded CPUs in industrial control units with thermal constraints. IC Role / Device Role / Timing Role: Dual-phase controller implementing active current balancing and ADOPT to maintain <1% output deviation during 10 A/µs transients. Use Value: Achieves required transient performance with fewer output capacitors (e.g., four 820 µF OS-CONs instead of eight 1000 µF electrolytics). | Use Scenario: Upgrading legacy desktop platforms with Tualatin support while reusing existing 5 V or 12 V main rails and SOIC-compatible PCB footprints. IC Role / Device Role / Timing Role: Drop-in replacement for earlier VRM controllers; maintains pin compatibility with ADP3161 and identical SO-16 layout. Use Value: Enables VRM 8.5 compliance without PCB redesign - leverages same layout, drivers (ADP3412), and passive component values. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-phase synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP3161JRZ | Same SO-16 package, identical pinout, but lacks ADOPT™ and has ±1.0% output accuracy (vs. ±0.8%) | No active voltage positioning; requires more output capacitance for same transient performance | Choose when cost sensitivity outweighs need for minimal capacitor count and tighter accuracy |
| ISL6522CBZ | Intersil part in 20-pin QSOP; includes integrated MOSFET drivers (vs. logic-level only); no VID25 pin | Eliminates need for external drivers (e.g., ADP3412), but requires different layout and driverless design approach | Choose when board space is constrained and driver integration justifies package change and layout revision |
Compared with ADP3162JRZ, ADP3161JRZ offers pin-for-pin compatibility but sacrifices ADOPT™ and 0.2% accuracy margin, while ISL6522CBZ trades external driver flexibility for integrated drive capability - making ADP3162JRZ optimal for VRM 8.5-compliant, cost-sensitive, capacitor-minimized Tualatin supplies.
Availability
ADP3162JRZ is available at Aetrix Electronics and suitable for desktop CPU core supplies, VRM 8.5 modules, and high-current embedded x86 processor power applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADP3162JRZ 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial, and computing applications.
The ADP3162JRZ belongs to Analog Devices' CPU power management IC product line, designed specifically to meet Intel VRM specifications for high-efficiency, multi-phase core voltage regulation in desktop and embedded x86 platforms.
FAQ
What is the function of the VID25 pin on the ADP3162JRZ?
The VID25 pin on the ADP3162JRZ is the fifth bit of the 5-bit VID bus, enabling 32 discrete output voltage settings from 1.05 V to 1.825 V in 25 mV increments. It is internally pulled up to the 3.0 V REF output, so an open connection defaults to logic high. This pin, combined with VID0–VID3, determines the DAC reference voltage that sets the FB regulation point - a critical requirement for Intel VRM 8.5 compliance. The ADP3162JRZ uses all five VID inputs to achieve its specified output range and step resolution.
Does the ADP3162JRZ integrate MOSFET drivers or require external ones?
The ADP3162JRZ does not integrate power MOSFET drivers; it provides only logic-level PWM1 and PWM2 outputs intended to interface with external high-current drivers such as the ADP3412, ADP3413, or ADP3414. These drivers translate the ADP3162JRZ's 0–5 V logic signals into gate-drive voltages capable of switching high-side and low-side N-channel MOSFETs. This architecture allows flexible selection of driver strength and layout optimization - a deliberate design choice reflected in the ADP3162JRZ's functional block diagram and application circuits.
How does ADOPT™ technology improve transient response in the ADP3162JRZ?
ADOPT™ (Analog Devices Optimal Positioning Technology) in the ADP3162JRZ improves transient response by dynamically adjusting the output voltage setpoint based on real-time load current - lowering it under heavy load and raising it at light load. This active voltage positioning ensures the output remains optimally centered within the VRM 8.5 tolerance band during rapid load steps, reducing required output capacitance by up to 50% compared to passive positioning. The ADP3162JRZ implements this via the COMP pin, where the gm amplifier's output modulates the current sense threshold and feedback reference simultaneously - a feature explicitly detailed in the Theory of Operation section of the ADP3162JRZ datasheet.
What is the purpose of the crowbar function in the ADP3162JRZ, and how is it triggered?
The crowbar function in the ADP3162JRZ is a hardware-level overvoltage protection mechanism that forces both PWM1 and PWM2 outputs low within 300 ns when the sensed output voltage exceeds 114–134% of the nominal VID-set voltage. It is triggered by an independent crowbar comparator monitoring the FB pin - bypassing the control loop entirely. This action turns off both high-side MOSFETs and activates low-side devices, rapidly sinking inductor energy to clamp the output. The ADP3162JRZ crowbar resets only when voltage falls below 50–70% of nominal, ensuring safe recovery after fault clearance - a critical safeguard for Intel Tualatin processors as confirmed in the General Description and Overvoltage Protection sections.
Can the ADP3162JRZ operate with a 5 V input supply, or is 12 V required?
The ADP3162JRZ supports both 5 V and 12 V main input supplies, as explicitly stated in the General Description: "converting a 5 V or 12 V main supply into the core supply voltage". Its VCC pin operates across 5.9–6.9 V UVLO threshold, and absolute maximum rating allows up to +15 V. Application circuits in the datasheet (e.g., Figure 2) show operation from 5 V VIN, and the Ordering Guide confirms commercial temperature range (0°C to 70°C) compatibility with either rail. Therefore, the ADP3162JRZ is fully qualified for 5 V input use in VRM 8.5-compliant desktop CPU supplies - no 12 V requirement exists.
ADP3162JRZ 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, Intel VRM8.5
- Voltage - Input:
- 15V
- Number of Outputs:
- 5
- Voltage - Output:
- 1.825V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ADP3162JRZ FAQ
1.How can I place an order for ADP3162JRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3162JRZ 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 ADP3162JRZ reliable?
The price and inventory of ADP3162JRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3162JRZ is usually 5 days.
3.What payment methods are accepted for ADP3162JRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3162JRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3162JRZ?
ADP3162JRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3162JRZ 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 ADP3162JRZ?
For technical support, including ADP3162JRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3162JRZ requirements.
6.How does Aetrix verify that ADP3162JRZ is sourced from the original manufacturer or authorized distributors?
All ADP3162JRZ 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 ADP3162JRZ meets industry standards.
7.What is the process for return or replacement of ADP3162JRZ?
All ADP3162JRZ units undergo pre-shipment inspection (PSI). If there is an issue with ADP3162JRZ, 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 ADP3162JRZ part is unused and in its original packaging.
Return procedure for ADP3162JRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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