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Analog Devices Inc./Maxim Integrated MAX16731AWX+
- Part No.:
- MAX16731AWX+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 45-WFBGA, WLBGA
- Datasheet:
-
MAX16731AWX+.pdf
- Description:
- IC REG BUCK ADJ 30A 45WLP
- Quantity:
- Payment:
- Shipping:
Inventory:143
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Product details
Overview
MAX16731AWX+ from Analog Devices is a fully integrated 30A, 1.5MHz step-down DC-DC switching regulator with fixed-frequency current-mode control, 2.7V–16V input range, 0.5V–5.8V adjustable output, and internal 1.8V LDO for gate drive and analog circuitry-designed for high-density point-of-load regulation in servers and networking equipment.
For engineers reviewing the MAX16731AWX+ datasheet, MAX16731AWX+ pinout, MAX16731AWX+ application, or MAX16731AWX+ equivalent, key selection considerations include programmable switching frequency (500kHz–1.5MHz), three-pin strap configuration (PGM0/PGM1/PGM2), differential remote sensing, selectable DCM mode for light-load efficiency, and robust protection suite including POCP/NOCP/OVP/OTP.
Technical Context
The MAX16731AWX+ implements fixed-frequency peak-current-mode control with internal slope compensation and a 0.5V reference voltage, enabling stable regulation across wide load and line variations. Its advanced modulation scheme (AMS) dynamically adjusts both leading and trailing edges during transients to extend closed-loop bandwidth without phase-margin penalty.
Configuration is managed via three dedicated programming pins: PGM0 selects switching frequency and predefined voltage-loop gain scenario (A–F), while PGM1 and PGM2 jointly configure POCP threshold (28A/33A/38A) and DCM enable/disable state. The device integrates an internal 1.8V LDO (VCC) powered from VDDH and supplies AVDD through an external resistor, eliminating need for external bias rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 16V - supports wide-input industrial and telecom power rails without pre-regulation |
| Output Current | Up to 30A - delivers high current from compact WLP package with thermal design validated at TJ = 125°C |
| Switching Frequency | Configurable 500kHz to 1.5MHz - enables trade-off between solution size (higher fSW) and efficiency (lower fSW) |
| Output Voltage Range | 0.5V to 5.8V - covers core logic, memory (VDDQ), and I/O supply requirements with ±1% reference accuracy |
| Peak Efficiency | 91.2% at 12VIN/1.2VOUT/500kHz - achieved via low-RDS(on) integrated FETs and optimized gate drive |
| Junction Temp Range | −40°C to +125°C - qualified for harsh environments including server baseboard and storage controller applications |
| Protection Features | POCP (28/33/38A), NOCP (−84% of POCP), OVP (±13%), OTP (155°C), UVLO/OVLO - ensures autonomous fault recovery with hiccup-mode restart |
Pinout & Package
The MAX16731AWX+ 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 in space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGM0 | Frequency & Scenario Select | Connects to AGND via resistor to select one of 32 switching frequencies and predefined voltage-loop gain (Scenarios A–F) |
| PGM1 / PGM2 | Protection & Mode Control | Jointly configure POCP threshold (28A/33A/38A) and DCM enable/disable; each accepts AVDD/AGND/open states |
| SNSP / SNSN | Differential Remote Sense | Measures output voltage at load to compensate for PCB IR drop; enables accurate regulation under high-current conditions |
| VCC / AVDD | Internal Bias Rails | VCC = 1.8V LDO output for gate drives; AVDD = 1.8V analog supply derived via external resistor from VCC |
| PGOOD | Open-Drain Status Flag | Asserts low during startup, faults (OVP/OTP/OC), or UVLO; requires external pull-up for system sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Modulation Scheme (AMS) | Enables simultaneous leading/trailing-edge modulation during load transients to reduce output capacitance by up to 30% versus fixed-PWM |
| Selectably Enabled DCM | Reduces light-load switching losses by dropping frequency below 500kHz when valley current falls below −1.26A to −1.73A (configurable) |
| Internal Compensation | Eliminates external compensation network; voltage-loop gain set by PGM0-strapped scenario (RVGA = 15.7kΩ to 62.3kΩ) |
| Differential Remote Sensing | Rejects up to 100mV of common-mode noise on sense lines; maintains ±0.5% output accuracy over full load/temperature range |
| Three-Level Programming Pins | Enables 32 × 3 × 3 = 288 unique configurations without I²C or PMBus interface-ideal for cost-sensitive, high-volume deployments |
Applications
| Communications Equipment | Networking Equipment |
|---|---|
Use Scenario: Regulating 1.2V core supply for high-speed SerDes PHYs in 5G baseband units. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 30A with <500ns transient response using AMS. Use Value: Enables use of smaller bulk capacitors (≤220μF total) while maintaining <±20mV output deviation during 20A/μs load steps. | Use Scenario: Powering 3.3V I/O banks and 1.8V DDR4 memory interfaces in enterprise switches. IC Role / Device Role / Timing Role: Dual-output capable regulator (via feedback divider) supporting VDDQ and auxiliary rails. Use Value: Differential sensing maintains ±0.8% output accuracy across 15cm PCB traces with >10A dynamic current sharing. |
| Servers and Storage Equipment | Memory VDDQ Regulation |
Use Scenario: Providing 1.2V CPU core voltage in dense 1U rack servers with constrained airflow. IC Role / Device Role / Timing Role: High-power density buck converter operating at 1.2MHz to minimize inductor footprint (FP1008R5-R220-R). Use Value: Achieves 29A continuous output at 85°C ambient with 200LFM airflow-validated per SOA curves in datasheet. | Use Scenario: Delivering tightly regulated 1.25V VDDQ to DDR5 memory modules in AI accelerators. IC Role / Device Role / Timing Role: Precision remote-sense regulator with 0.5V internal reference and ±0.5% output tolerance. Use Value: Maintains <±15mV ripple at 30A/1MHz switching-critical for signal integrity in >6400MT/s memory channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3695-25 from Monolithic Power Systems | 25A rated, 2.7V–16V input, 0.6V–5.5V output, 500kHz–2MHz programmable fSW, QFN-24 package (4mm × 4mm) | Limited to 25A max; lacks differential sensing and AMS; uses external compensation | Preferred where lower current and simpler layout outweigh need for ultra-high transient performance |
| TPS546D24A from Texas Instruments | 40A rated, 3.0V–18V input, 0.5V–3.3V output, PMBus-enabled, 40-pin QFN (5mm × 6mm) | Requires digital interface and external EEPROM; larger footprint; higher BOM count | Selected when telemetry, margining, and multi-rail coordination are required in datacenter PSU designs |
Compared with MPM3695-25, MAX16731AWX+ delivers +5A current headroom and superior transient suppression via AMS; compared with TPS546D24A, it offers pin-strapped simplicity and 40% smaller footprint but no digital control-making it optimal for analog-centric, high-volume server board designs.
Availability
MAX16731AWX+ is available at Aetrix Electronics and suitable for communications infrastructure, networking hardware, and server power delivery requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX16731AWX+ 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 Wilmington, MA, with deep expertise in power management ICs for mission-critical systems.
The MAX16731AWX+ belongs to Analog Devices' high-current integrated buck regulator product line, engineered specifically for space-constrained, thermally demanding point-of-load applications in cloud infrastructure and high-speed computing platforms.
FAQ
What is the maximum supported switching frequency for MAX16731AWX+?
The MAX16731AWX+ supports a configurable switching frequency range from 500kHz to 1.5MHz. The upper limit is determined by minimum controllable on-time (32.8ns–51.3ns) and off-time (100ns), with 1.5MHz achievable at lighter loads and lower input/output voltage differentials. Frequency selection is set via resistor value on PGM0 pin per Table 1 in the datasheet.
Does MAX16731AWX+ require external compensation components?
No, MAX16731AWX+ features internal compensation. Voltage-loop gain is preconfigured by PGM0 strapping to one of six scenarios (A–F), each assigning a specific RVGA resistance (15.7kΩ to 62.3kΩ). This eliminates external compensation networks and simplifies layout while maintaining stability across 0.5V–5.8V output ranges.
How does the Advanced Modulation Scheme (AMS) in MAX16731AWX+ improve transient response?
AMS in MAX16731AWX+ dynamically modulates both leading and trailing edges of the PWM signal during large load transients, temporarily increasing effective switching frequency. This extends closed-loop bandwidth without sacrificing phase margin, reducing required output capacitance by up to 30% and limiting output voltage deviation to <±20mV during 20A/μs steps.
What protection features are integrated into MAX16731AWX+?
MAX16731AWX+ integrates positive/negative overcurrent protection (POCP/NOCP), output overvoltage protection (OVP), input undervoltage/overvoltage lockout (UVLO/OVLO), and overtemperature protection (OTP) with 20°C hysteresis. All protections trigger hiccup-mode restart after 20ms, and PGOOD asserts low during fault conditions for system-level monitoring.
Can MAX16731AWX+ operate with a pre-biased output during startup?
Yes, MAX16731AWX+ supports smooth startup with output pre-bias. During soft-start, the device monitors the output voltage and adjusts gate drive timing to prevent reverse current flow into the output capacitor. This capability is confirmed in Figure 3 (Startup and Shutdown Timing) of the datasheet and enables safe integration into hot-swap and redundant power architectures.
MAX16731AWX+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 45-WFBGA, WLBGA
- Packaging:
- Strip
- 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+ FAQ
1.How can I place an order for MAX16731AWX+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16731AWX+ 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+ reliable?
The price and inventory of MAX16731AWX+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16731AWX+ is usually 5 days.
3.What payment methods are accepted for MAX16731AWX+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16731AWX+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16731AWX+?
MAX16731AWX+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16731AWX+ 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+?
For technical support, including MAX16731AWX+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16731AWX+ requirements.
6.How does Aetrix verify that MAX16731AWX+ is sourced from the original manufacturer or authorized distributors?
All MAX16731AWX+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX16731AWX+?
All MAX16731AWX+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16731AWX+, 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+ part is unused and in its original packaging.
Return procedure for MAX16731AWX+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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