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Analog Devices Inc. ADP3182JRQZ-REEL
- Part No.:
- ADP3182JRQZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADP3182JRQZ-REEL.pdf
- Description:
- SWITCHING CONTROLLER, VOLTAGE-MO
- Quantity:
- Payment:
- Shipping:
Inventory:802,500
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Product details
Overview
ADP3182JRQZ-REEL from Analog Devices is a 1-/2-/3-phase synchronous buck controller optimized for high-current, low-voltage point-of-load (POL) conversion from 12 V input to adjustable output (0.8 V to >5 V), featuring ±1% differential sensing error over temperature, programmable switching frequency up to 1 MHz per phase, and active current balancing across phases - deployed in DDR memory supplies and auxiliary power rails.
For engineers reviewing the ADP3182JRQZ-REEL datasheet, ADP3182JRQZ-REEL pinout, ADP3182JRQZ-REEL application, or ADP3182JRQZ-REEL equivalent, key selection criteria include its multimode PWM architecture, logic-level PWM outputs for external MOSFET drivers, programmable short-circuit latch-off delay, and QSOP-20 package compatibility with thermal-balanced multiphase designs.
Technical Context
The ADP3182JRQZ-REEL implements a multimode fixed-frequency PWM control architecture with independent phase enable/disable via PWM3 grounding, enabling configurable 1-/2-/3-phase operation. Its internal oscillator frequency (set by RT resistor) is divided by the active phase count to determine per-phase switching frequency.
It integrates dual-sensing paths: differential voltage feedback (FB/FBRTN) with 800 mV reference and ±1% worst-case error over 0°C–85°C, and dedicated current sense amplifier (CSREF/CSSUM/CSCOMP) supporting DCR or resistor-based current monitoring with programmable gain and <±5.5 mV offset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency Range | 0.25–3 MHz (set by RT resistor; per-phase frequency = master clock / active phases) |
| Output Voltage Range | 0.8 V to >5 V (externally adjustable via FB/FBRTN resistor divider; 800 mV reference) |
| Differential Sensing Error | ±1% worst-case over 0°C–85°C (ensures tight regulation under load/temperature variation) |
| Current Limit Threshold | 105–145 mV (set by ILIMIT resistor; 10.4 mV/μA scaling enables precise overcurrent trip point) |
| Power-Good Thresholds | UV: 600–720 mV, OV: 880–1000 mV relative to FBRTN (open-drain PWRGD output signals valid regulation window) |
| Crowbar Trip Point | 0.975–1.1 V relative to FBRTN (forces low-side MOSFETs on to clamp overvoltage) |
| Operating Temperature | 0°C to +85°C ambient (commercial grade; junction max 125°C) |
| Package | 20-lead QSOP (5.3 mm × 10.2 mm body; 0.65 mm pitch; RoHS-compliant) |
Pinout & Package
ADP3182JRQZ-REEL is housed in a 20-lead QSOP (Quad Small Outline Package) with standard 0.65 mm lead pitch and exposed pad not present. Pin 1 is marked by a dot or beveled corner; pin numbering follows counter-clockwise sequence from top-left when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Supply Input | 12 V main supply input; UVLO threshold 6.5–7.3 V ensures safe startup |
| FBRTN (Pin 2) | Feedback Reference Return | Remote sense ground reference for FB; 100–140 μA bias current enables accurate Kelvin sensing |
| FB (Pin 3) | Feedback Input | Connects to resistor divider midpoint; sets output voltage via 800 mV internal reference |
| COMP (Pin 4) | Error Amplifier Output | Compensation node for voltage loop; connects to RC network between FB and COMP |
| PWRGD (Pin 5) | Power-Good Output | Open-drain signal indicating output within 600–1000 mV of FBRTN; requires external pull-up |
| EN (Pin 6) | Enable Input | Logic-high (>2.0 V) enables operation; logic-low (<0.8 V) disables PWM outputs and pulls ILIMIT low |
| DELAY (Pin 7) | Soft Start & Latch-Off Timing | RC network here sets both soft-start ramp time and overcurrent latch-off delay (e.g., 470 kΩ + 39 nF = ~1.5 ms) |
| RT (Pin 8) | Oscillator Frequency Set | Resistor to GND sets master clock (e.g., 258 kΩ → ~1.2 MHz); per-phase freq = master / active phases |
| RAMPADJ (Pin 9) | PWM Ramp Slope Control | Resistor from VIN to this pin adjusts internal ramp slope for transient response optimization |
| ILIMIT (Pin 10) | Current Limit Setpoint | Resistor to GND sets current limit threshold (10.4 mV/μA scaling); pulled low during shutdown |
| PWM1–PWM3 (Pins 18–20) | Logic-Level PWM Outputs | Drive external gate drivers (e.g., ADP3120A); grounding PWM3 disables third phase |
| SW1–SW3 (Pins 15–17) | Phase Current Balance Inputs | Monitor switch-node voltages for per-phase current balancing; unused SW pins left open |
| CSREF (Pin 11) | Current Sense Reference | Connected to common inductor node; serves as positive input for current sense amplifier |
| CSSUM (Pin 12) | Current Summing Node | Summed inductor currents feed here via external resistors; negative input of CSA |
| CSCOMP (Pin 13) | Current Sense Compensation | RC network to CSSUM sets CSA gain and bandwidth; determines current limit accuracy |
| GND (Pin 14) | Ground Reference | Common return for all internal circuits and logic outputs; must be low-impedance PCB plane |
Key Features
| Feature | Design Value |
|---|---|
| Selectable 1-/2-/3-phase operation | Configured by grounding PWM3; enables scalable design from 20 A to >60 A while maintaining thermal balance |
| Active current balancing circuit | Uses SW1–SW3 inputs and internal ramp to equalize phase currents dynamically, reducing thermal stress on individual MOSFETs |
| Programmable short-circuit protection | Latch-off delay set by DELAY RC network (e.g., 1.5 ms typical); allows recovery if fault clears before timeout |
| Logic-level PWM outputs | 0–5 V swing with ±400 μA drive capability; directly interfaces with ADP3120A and similar gate drivers without level-shifting |
| Differential remote voltage sensing | FB/FBRTN pair rejects PCB trace IR drop; ±1% error over temp ensures stable DDR core voltage under varying load |
| Built-in crowbar function | Triggers at 0.975–1.1 V over FBRTN to turn on low-side MOSFETs, clamping overvoltage and protecting downstream ICs |
Applications
| DDR Memory Supply | Auxiliary CPU Core Rail |
|---|---|
Use Scenario: Delivering tightly regulated 1.2 V/30 A to DDR4 memory modules in servers with strict ±1% tolerance and fast transient response. IC Role / Device Role / Timing Role: Multiphase synchronous buck controller managing three parallel converter stages with interleaved timing to reduce input/output ripple. Use Value: Active current balancing maintains phase current matching within ±5%, minimizing thermal hotspots and extending capacitor lifetime. | Use Scenario: Generating 1.8 V/55 A auxiliary supply for FPGA I/O banks or GPU memory interfaces where layout space is constrained. IC Role / Device Role / Timing Role: Configurable 2-phase controller (PWM3 grounded) driving external MOSFET drivers to achieve high efficiency at light-to-heavy loads. Use Value: Programmable soft start (via DELAY pin) limits inrush current to <15 A, preventing input rail collapse during power-up. |
| Point-of-Load Module | High-Density Telecom Board |
Use Scenario: Integrated POL module for baseband processor requiring 0.85 V/40 A with minimal footprint and thermal management overhead. IC Role / Device Role / Timing Role: 3-phase controller using DCR current sensing (no shunt resistors) to maximize efficiency and reduce BOM cost. Use Value: Differential FB/FBRTN sensing achieves ±0.8% output regulation despite 50 mV PCB voltage drop between regulator and load. | Use Scenario: Distributed power architecture in 1U telecom chassis needing multiple isolated 3.3 V/25 A rails with coordinated sequencing. IC Role / Device Role / Timing Role: Primary controller enabling EN pin synchronization across multiple ADP3182JRQZ-REEL units for staggered startup. Use Value: Open-drain PWRGD outputs can be wire-OR'd to generate system-level power-good signal for FPGA configuration. |
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 RAMPADJ pin; uses different current balance method | Supports higher current (>100 A) but requires larger PCB area and lacks DCR thermistor compensation | Choose ISL6322IRZ when scaling beyond 3-phase or integrating drivers; ADP3182JRQZ-REEL preferred for compact 1–3-phase designs with thermal flexibility |
| TPS53679RSLR | 4-phase; digital interface (PMBus); built-in telemetry; 0.5 V–2.5 V output range only | Enables real-time current/voltage monitoring but adds firmware complexity and cost | Choose TPS53679RSLR for systems requiring telemetry and dynamic margining; ADP3182JRQZ-REEL suits analog-only, cost-sensitive POLs |
Compared with ISL6322IRZ and TPS53679RSLR, ADP3182JRQZ-REEL offers optimal trade-off between phase scalability, analog simplicity, and thermal-aware current balancing - making it ideal for DDR and auxiliary supplies where deterministic analog control and layout efficiency are prioritized over digital configurability or ultra-high phase count.
Availability
ADP3182JRQZ-REEL is available at Aetrix Electronics and suitable for DDR memory supplies, auxiliary CPU core rails, and point-of-load modules requiring stable component supply, long-term manufacturability, and commercial-temperature-grade reliability.
Supply support for ADP3182JRQZ-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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, power management, and signal conditioning.
The ADP3182JRQZ-REEL belongs to Analog Devices' Power Management portfolio, designed specifically for high-efficiency, multiphase DC/DC conversion in computing and communications infrastructure where thermal balance and transient response are critical.
FAQ
What is the maximum supported switching frequency per phase for ADP3182JRQZ-REEL?
The ADP3182JRQZ-REEL supports up to 1 MHz per phase. This is achieved by setting the master oscillator frequency (via RT pin) to 1 MHz for 1-phase operation, 2 MHz for 2-phase, or 3 MHz for 3-phase - since the per-phase frequency equals the master clock divided by the number of active phases. The datasheet confirms 0.25–3 MHz oscillator range with typical 3-phase operation at 200 kHz (RT = 348 kΩ).
How does ADP3182JRQZ-REEL implement current balancing across phases?
ADP3182JRQZ-REEL uses dedicated SW1–SW3 inputs to monitor switch-node voltages, feeding into an internal current balancing circuit that compares phase currents against a shared ramp signal. It adjusts PWM timing per phase to equalize average current, with matching accuracy of ±9% in TON and ±7% in input current - enabling thermal derating reduction and extended MOSFET lifetime in high-current POL designs.
Can ADP3182JRQZ-REEL operate with only one active phase?
Yes, ADP3182JRQZ-REEL supports single-phase operation by grounding both PWM2 and PWM3 pins. However, note that the oscillator frequency must be doubled versus the desired PWM frequency (e.g., set RT for 2 MHz to achieve 1 MHz per phase), because the internal clock division logic treats a single-phase configuration as two-phase for timing consistency.
What is the purpose of the RAMPADJ pin on ADP3182JRQZ-REEL?
The RAMPADJ pin on ADP3182JRQZ-REEL sets the slope of the internal PWM ramp generator by connecting an external resistor from the input supply (VIN) to this pin. Adjusting the ramp slope optimizes transient response and stability - steeper ramps improve load-step immunity, while shallower ramps reduce noise sensitivity. The datasheet specifies ±50 mV output swing and 0–100 μA input current range for precise tuning.
Does ADP3182JRQZ-REEL include overvoltage protection for the load?
Yes, ADP3182JRQZ-REEL includes crowbar overvoltage protection: when the FB voltage exceeds 0.975–1.1 V relative to FBRTN, all PWM outputs are forced low to turn on low-side MOSFETs, actively pulling down the output. Recovery occurs only after the voltage falls below ~650 mV, providing robust protection for sensitive downstream loads like microprocessors and FPGAs.
ADP3182JRQZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Output Type:
- PWM Signal
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 3
- Output Phases:
- 3
- Voltage - Supply (Vcc/Vdd):
- 12V
- Frequency - Switching:
- 250kHz ~ 3MHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- No
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Enable, Frequency Control, Power Good, Ramp, Soft Start
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QSOP
ADP3182JRQZ-REEL FAQ
1.How can I place an order for ADP3182JRQZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3182JRQZ-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 ADP3182JRQZ-REEL reliable?
The price and inventory of ADP3182JRQZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3182JRQZ-REEL is usually 5 days.
3.What payment methods are accepted for ADP3182JRQZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3182JRQZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3182JRQZ-REEL?
ADP3182JRQZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3182JRQZ-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 ADP3182JRQZ-REEL?
For technical support, including ADP3182JRQZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3182JRQZ-REEL requirements.
6.How does Aetrix verify that ADP3182JRQZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADP3182JRQZ-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 ADP3182JRQZ-REEL meets industry standards.
7.What is the process for return or replacement of ADP3182JRQZ-REEL?
All ADP3182JRQZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADP3182JRQZ-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 ADP3182JRQZ-REEL part is unused and in its original packaging.
Return procedure for ADP3182JRQZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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