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Analog Devices Inc./Maxim Integrated MAX16731AWX+T
- Part No.:
- MAX16731AWX+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 45-WFBGA, WLBGA
- Datasheet:
-
MAX16731AWX+T.pdf
- Description:
- IC REG BUCK ADJ 30A 45WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,681
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Product details
Overview
MAX16731AWX+T from Analog Devices is a fully integrated, high-efficiency 30A step-down DC-DC switching regulator with fixed-frequency current-mode control. It operates from 2.7V to 16V input, delivers adjustable 0.5V–5.8V output, and supports configurable 500kHz–1.5MHz switching frequency. Its internal 1.8V LDO powers gate drives (VCC) and analog circuitry (AVDD), enabling single-supply operation in point-of-load applications for servers and networking equipment.
For engineers reviewing the MAX16731AWX+T datasheet, MAX16731AWX+T pinout, MAX16731AWX+T application, or MAX16731AWX+T equivalent, key selection considerations include its WLP package footprint (2.52mm × 4.89mm, 45-bump), programmable overcurrent thresholds (28A/33A/38A), AMS-enhanced load transient response, selectable DCM for light-load efficiency, and differential remote sensing capability.
Technical Context
The MAX16731AWX+T implements fixed-frequency, peak-current-mode control with internal compensation and an advanced modulation scheme (AMS) that dynamically adjusts both leading and trailing edges during load transients to extend closed-loop bandwidth without phase-margin penalty. Its control loop uses a 0.5V internal reference, error amplifier, slope compensation, and PWM modulator driving integrated high-side and low-side MOSFETs.
Configuration is managed via three programming pins (PGM0, PGM1, PGM2): PGM0 selects switching frequency and predefined voltage-loop gain scenarios (A–F); PGM1/PGM2 jointly configure POCP threshold (28A/33A/38A) and DCM enable/disable. Fault protection includes hiccup-mode positive/negative overcurrent (POCP/NOCP), output overvoltage (OVP), input UVLO/OVLO, and overtemperature (OTP) with 20ms auto-restart.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 16V - supports wide-input industrial and telecom supplies without external pre-regulation |
| Output Current Rating | 30A continuous - delivers high power density in compact WLP package for space-constrained PoL rails |
| Output Voltage Range | 0.5V to 5.8V - covers DDR memory VDDQ, core logic, and ASIC I/O supply requirements |
| Switching Frequency | 500kHz to 1.5MHz - configurable for size vs. efficiency trade-off; higher frequencies reduce LC filter size |
| Peak Efficiency | 91.2% at 12VIN/1.2VOUT/500kHz - enables thermal management in high-power-density server modules |
| Junction Temperature Range | –40°C to +125°C - qualified for harsh environments including baseband units and storage controllers |
| Package | 2.52mm × 4.89mm, 45-bump WLP - ultra-compact footprint with optimized thermal resistance (θJA = 14.5°C/W on EVKIT) |
Pinout & Package
The MAX16731AWX+T is housed in a compact 2.52mm × 4.89mm, 45-bump Wafer-Level Package (WLP) with exposed thermal pad on bottom side for enhanced heat dissipation. Pin layout follows standard top-view orientation with LX, PGND, and VDDH distributed across multiple bumps for low-inductance power routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGM0 | Frequency/Scenario Programming Input | Connects to AGND via resistor to select one of 32 switching frequencies and predefined voltage-loop gain scenario (A–F) |
| PGM1 / PGM2 | Protection Mode Programming Inputs | Jointly configure POCP threshold (28A/33A/38A) and DCM enable/disable; each accepts AVDD, AGND, or open states |
| VCC | Internal 1.8V LDO Output | Powers high-side/low-side gate drivers; requires ≥4.7μF ceramic capacitor to PGND for stable bias |
| AVDD | Analog Core Supply | 1.8V analog rail derived from VCC via 2.2Ω–4.7Ω resistor; decoupled with ≥1μF ceramic to AGND |
| SNSP / SNSN | Differential Remote Sense Inputs | Enable precise regulation at load by rejecting PCB IR drop; support resistive divider for >0.5V outputs |
| LX | Switching Node | High-current connection to external inductor; multiple bumps minimize parasitic inductance and EMI |
| PGND / AGND | Power and Analog Grounds | Separate ground planes required; PGND carries high di/dt currents; AGND serves sensitive analog circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Modulation Scheme (AMS) | Enables simultaneous leading/trailing-edge modulation during load transients to improve response speed and reduce required output capacitance |
| Selectably Enabled Discontinuous Conduction Mode (DCM) | Reduces switching losses at light loads by lowering frequency; transitions seamlessly between CCM and DCM based on valley current detection |
| Three-Stage Programmable Overcurrent Protection | Supports 28A/33A/38A POCP thresholds via PGM1/PGM2; includes negative OCP (NOCP) at –84% of POCP for reverse-current fault handling |
| Integrated Dual LDO Architecture | VCC (1.8V, 1.71–1.95V) powers gate drivers; AVDD (1.8V, regulated from VCC) supplies analog core-eliminates need for external bias supplies |
| Differential Remote Sensing | Compensates for PCB trace resistance between regulator and load, ensuring ±1% output accuracy under varying current conditions |
Applications
| Communications Equipment | Networking Equipment |
|---|---|
Use Scenario: Powering FPGA transceivers and SerDes interfaces in 5G baseband units requiring tight voltage tolerance and fast transient response. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 1.2V/30A with AMS-enhanced load step recovery to maintain signal integrity. Use Value: Reduces required output capacitance by up to 30% versus conventional PWM regulators due to extended closed-loop bandwidth. | Use Scenario: Supplying CPU I/O and memory interface rails in enterprise switches with dynamic traffic-dependent load profiles. IC Role / Device Role / Timing Role: High-current buck converter with selectable DCM mode to maintain >88% efficiency at 10% load while meeting thermal limits. Use Value: Enables fanless operation in dense switch chassis by minimizing conduction and switching losses across full load range. |
| Servers and Storage Equipment | Memory VDDQ Regulation |
Use Scenario: Providing stable 1.2V/25A supply to dual-socket server CPUs with rapid load changes during compute bursts. IC Role / Device Role / Timing Role: Main VR13-compatible core regulator using differential remote sense to reject motherboard IR drop. Use Value: Achieves <±5mV output deviation under 20A/μs load steps, preventing timing violations in high-speed interconnects. | Use Scenario: Regulating DDR4/DDR5 VDDQ rails (1.25V/1.1V) in storage controllers where voltage accuracy directly impacts data reliability. IC Role / Device Role / Timing Role: Precision PoL regulator with 0.5V internal reference and ±0.6% output voltage accuracy over temperature. Use Value: Maintains JEDEC-specified VDDQ tolerance (±3%) even with 150mΩ PCB trace resistance between IC and DRAM package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2965GQ-Z | 40A rating, 4.5–16V input, 0.5–3.3V output; uses digital multiphase control with PMBus interface | Requires external MCU for configuration; lacks AMS and integrated LDOs; needs external gate drivers | Preferred when system-level telemetry, phase shedding, or multi-rail coordination is required |
| TPS546D24RQFR | 40A rating, 4.5–18V input, 0.5–3.3V output; supports PMBus 1.3, adaptive on-time D-CAP3 control | No integrated LDOs; requires external 3.3V/1.8V bias; no differential remote sense; larger 6mm × 6mm QFN | Chosen for designs needing digital configurability, margining, and fault logging via PMBus |
Compared with MP2965GQ-Z and TPS546D24RQFR, the MAX16731AWX+T offers superior integration (dual LDOs, AMS, DCM), smaller WLP footprint, and simpler analog configuration-making it optimal for cost-sensitive, space-constrained PoL applications where digital control overhead is unnecessary.
Availability
MAX16731AWX+T is available at Aetrix Electronics and suitable for communications equipment, networking infrastructure, and server power delivery systems requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for MAX16731AWX+T 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, serving industrial, automotive, communications, and healthcare markets.
The MAX16731AWX+T belongs to Analog Devices' high-current, integrated power management IC portfolio designed specifically for demanding point-of-load applications in datacenter, telecom, and high-end computing systems where power density, efficiency, and transient performance are critical.
FAQ
What is the maximum output current capability of the MAX16731AWX+T under typical operating conditions?
The MAX16731AWX+T delivers up to 30A continuous output current at junction temperatures up to +125°C. At TA = +85°C with 200LFM airflow, it sustains 29A at 12VIN/1.8VOUT; at TA = +85°C with no airflow, it delivers 21A at 12VIN/0.8VOUT. These ratings assume proper PCB layout, thermal vias under the WLP package, and adherence to SOA curves in the datasheet. The MAX16731AWX+T achieves this with internal MOSFETs and integrated gate drive, eliminating external driver components.
How does the Advanced Modulation Scheme (AMS) in the MAX16731AWX+T improve transient response compared to standard fixed-frequency PWM?
The AMS in the MAX16731AWX+T enhances transient response by enabling simultaneous modulation of both leading and trailing edges of the switching waveform during large load steps-unlike conventional trailing-edge-only PWM. This increases effective control bandwidth without compromising phase margin, allowing faster correction of output voltage deviations. As a result, the MAX16731AWX+T reduces required output capacitance by up to 30% while maintaining <±15mV undershoot/overshoot under 20A/μs load steps, directly improving system-level power integrity.
Can the MAX16731AWX+T operate with a 24V input supply?
No, the MAX16731AWX+T has an absolute maximum input voltage (VDDH to PGND) of +19V and a recommended operating range of 2.7V to 16V. Applying 24V exceeds both specifications and risks permanent damage. For 24V input applications, a two-stage architecture-such as a front-end buck converter stepping 24V down to ≤16V followed by the MAX16731AWX+T-is required. The MAX16731AWX+T's internal protections (e.g., VDDH OVLO at 17.3–18.3V) will shut down the device before catastrophic failure but do not permit sustained 24V operation.
What is the role of the PGM0, PGM1, and PGM2 pins on the MAX16731AWX+T, and how are they configured?
The PGM0, PGM1, and PGM2 pins on the MAX16731AWX+T provide non-volatile configuration at startup: PGM0 (via resistor to AGND) selects switching frequency (500kHz–1.5MHz) and voltage-loop gain scenario (A–F); PGM1 and PGM2 (each tied to AVDD, AGND, or left open) jointly set POCP threshold (28A/33A/38A) and DCM enable/disable. All settings are latched during initialization and remain active until reset. The MAX16731AWX+T does not support dynamic reconfiguration-changes require power cycle. Configuration tables are provided in the datasheet's Pin-Strap Programmability section.
Does the MAX16731AWX+T support differential remote sensing, and how is it implemented?
Yes, the MAX16731AWX+T supports true differential remote sensing via dedicated SNSP and SNSN pins. SNSP connects to the positive output node at the load, while SNSN connects to the negative return path-enabling rejection of IR drop across PCB traces. This allows regulation accuracy of ±0.6% over temperature and line/load, even with up to 150mΩ trace resistance. To use it, connect SNSP/SNSN directly to the load terminals; if regulating above 0.5V, insert a resistor divider between output and SNSP while keeping SNSN at load ground. The MAX16731AWX+T's internal 0.5V reference ensures precision regardless of divider ratio.
MAX16731AWX+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 45-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.8V
- Current - Output:
- 30A
- Frequency - Switching:
- 500kHz ~ 1.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 45-WLP (4.89x2.52)
MAX16731AWX+T FAQ
1.How can I place an order for MAX16731AWX+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16731AWX+T 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 MAX16731AWX+T reliable?
The price and inventory of MAX16731AWX+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16731AWX+T is usually 5 days.
3.What payment methods are accepted for MAX16731AWX+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16731AWX+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16731AWX+T?
MAX16731AWX+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16731AWX+T 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 MAX16731AWX+T?
For technical support, including MAX16731AWX+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16731AWX+T requirements.
6.How does Aetrix verify that MAX16731AWX+T is sourced from the original manufacturer or authorized distributors?
All MAX16731AWX+T 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 MAX16731AWX+T meets industry standards.
7.What is the process for return or replacement of MAX16731AWX+T?
All MAX16731AWX+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16731AWX+T, 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 MAX16731AWX+T part is unused and in its original packaging.
Return procedure for MAX16731AWX+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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