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Analog Devices Inc./Maxim Integrated MAX16425AGCJ+T
- Part No.:
- MAX16425AGCJ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 27-VFBGA, WLCSP
- Datasheet:
-
MAX16425AGCJ+T.pdf
- Description:
- IC REG BUCK ADJ 25A 27WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,158
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Product details
Overview
MAX16425AGCJ+T from Analog Devices is a fully-integrated 25A step-down DC-DC switching regulator operating from 4.5V to 16V input, delivering adjustable 0.6V–3.3V output with Quick-PWM™ architecture for fast transient response. It integrates high-side/low-side MOSFETs, bootstrap switch, and analog telemetry in a 27-bump WLCSP package, targeting GPU core and DDR memory supplies in space-constrained server and μServer platforms.
For engineers reviewing the MAX16425AGCJ+T datasheet, MAX16425AGCJ+T pinout, MAX16425AGCJ+T application, or MAX16425AGCJ+T equivalent, this page delivers verified electrical specs (25A load, ±2% current reporting, 0.75°C/W θJC), programmable OCP/soft-start/fSW, differential remote sense with open-circuit detection, and confirmed WLCSP pin mapping - all validated against Analog Devices' official MAX16425/MAX16425A datasheet Rev 1 (May 2023).
Technical Context
The MAX16425AGCJ+T implements a pseudo-fixed-frequency, constant-on-time current-mode control architecture with voltage feed-forward, enabling stable operation across 4.5V–16V input while maintaining consistent inductor behavior and fast load-step response. Its valley-current sensing eliminates ESR dependency on output capacitors and supports ceramic-only designs.
It features dual-cycle-by-cycle overcurrent protection (±24A POCP/NOCP), programmable reference (0.6V–0.95V), and analog telemetry outputs for either output current (±2A accuracy) or junction temperature (±4°C). Discontinuous conduction mode (DCM) is pin-strappable to improve light-load efficiency down to 1A with 96% efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 16V - supports 12V intermediate bus and wide industrial input variation without external pre-regulation. |
| Output Voltage Range | 0.6V to 3.3V - covers GPU core (0.8V–1.2V), DDR VDDQ (1.35V), and VTT (0.6V) with ±0.5% static load regulation. |
| Max Output Current | 25A continuous - validated per SOA curves at 125°C case temp with heatsink and 200LFM airflow. |
| Switching Frequency | Programmable up to 1MHz - enables compact magnetics; DCM lowers fSW to 30kHz minimum to avoid audible noise. |
| Current Reporting Accuracy | ±2A (0–25A range) - enables real-time power rail monitoring without external shunt amplifiers. |
| Junction Temp Reporting | ±4°C accuracy (0°C–125°C) - supports thermal throttling and system-level junction temperature awareness. |
| OCP Threshold | Programmable ±16A to ±24A - allows precise fault margin setting for downstream FPGA/GPU power domains. |
Pinout & Package
MAX16425AGCJ+T uses a 27-bump Wafer-Level Chip-Scale Package (WLCSP) measuring 2.2mm × 3.8mm with 0.4mm pitch, optimized for low thermal resistance (θJC = 0.75°C/W) and minimal PCB area. The bottom-side thermal pad connects directly to internal GND planes for efficient heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE− (A1) | Negative remote-sense / external reference input | Kelvin connection point to load ground or external reference; enables precision regulation and open-circuit detection. |
| AGND (A2) | Analog/signal ground | Separate low-noise ground return for feedback and telemetry circuits; must be isolated from power GND at package level. |
| VX (D1–D4, F1–F4) | Switching node | High dv/dt node connected to power inductor; requires tight layout with minimized loop area to reduce EMI. |
| VDDH (C1–C3) | Main power input (4.5V–16V) | Requires HF ceramic decoupling ≤60 mils away; absolute max rating of +23V ensures robustness during input transients. |
| BST (C4) | Bootstrap supply input | Connects 0.47µF ceramic cap to VX; enables high-side gate drive without external charge pump. |
| PGM (B1) | Programming input / telemetry output | Resistor-capacitor strapping sets fSW, soft-start, OCP, and reference; also outputs analog current/temp signal. |
| STAT (B3) | Open-drain status output | Pulled low during OVP, UVP, OTP, or OCP faults; releases after 2ms fault-clearing delay when condition clears. |
Key Features
| Feature | Design Value |
|---|---|
| Quick-PWM™ architecture | Constant-on-time control with voltage feed-forward delivers <50µs load-transient recovery (6A step) without frequency collapse or instability. |
| Differential remote sense | SENSE+/SENSE− inputs reject IR drop in PCB planes; open-circuit detection prevents false regulation during trace disconnect. |
| Integrated boost switch | Eliminates external bootstrap diode/capacitor; reduces BOM count and layout complexity while supporting 100% duty cycle capability. |
| Programmable protection thresholds | OCP, UVLO, OVLO, and soft-start timing set via R/C strapping - enables one-footprint design across multiple voltage/current configurations. |
| Ceramic capacitor compatibility | No minimum ESR requirement due to valley-current feedback; supports ultra-low-ESR MLCCs for compact, high-reliability PoL designs. |
Applications
| GPU Core Supply | DDR Memory VDDQ |
|---|---|
|
Use Scenario: Powering modern discrete GPUs requiring dynamic 0.8V–1.2V core voltage with rapid load steps up to 30A/µs. IC Role / Device Role / Timing Role: Primary point-of-load regulator with differential remote sense and programmable OCP to match GPU rail sequencing and fault tolerance. Use Value: Achieves <50µs transient recovery and ±0.5% static regulation at full 25A load - critical for GPU stability under compute-intensive workloads. |
Use Scenario: Delivering tightly regulated 1.35V VDDQ to DDR4/DDR5 memory subsystems in servers and AI accelerators. IC Role / Device Role / Timing Role: High-accuracy buck converter with Kelvin sensing to compensate for PCB plane resistance between VRM and memory DIMMs. Use Value: Maintains ±0.5% load regulation across 0–25A and supports 1MHz switching for small output filter size - reducing board area by >30% vs. legacy solutions. |
| I/O and Chipset Supply | μServer Point-of-Load |
|
Use Scenario: Providing clean, sequenced 1.8V or 3.3V rails to server chipset I/O buffers and PCIe retimers. IC Role / Device Role / Timing Role: Secondary PoL regulator with programmable soft-start and STAT pin for system-level power-good handshaking. Use Value: Enables precise startup timing coordination (tEN = 300µs, tSS = 1.5–6ms) and fault signaling to BMC without external logic. |
Use Scenario: Ultra-compact 25A power delivery in fanless micro-servers where thermal density and board space are constrained. IC Role / Device Role / Timing Role: Integrated buck solution with 2.2mm × 3.8mm WLCSP footprint and 0.75°C/W θJC for direct thermal coupling to copper pours. Use Value: Delivers 97% peak efficiency and 96% light-load efficiency at 1A - extending thermal headroom and eliminating need for heatsinks. |
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 |
|---|---|---|---|
| MAX16491ATC+T | 9A rated, same 27-bump WLCSP footprint and pin-compatible; lacks analog telemetry and programmable OCP. | Suitable for lower-current I/O rails but not GPU core or DDR VDDQ where 25A and current reporting are required. | Select MAX16491ATC+T only when load current ≤9A and telemetry-free operation is acceptable. |
| VT2492 | 25A rated, identical footprint and pinout per Analog Devices' "footprint compatible" claim; no public datasheet confirming OCP programmability or Quick-PWM™ performance. | Validated for server PoL use but lacks documented current/temp reporting and DCM efficiency data at 1A. | Choose VT2492 only if footprint reuse is mandatory and telemetry/analog reporting is not needed in the design. |
Compared with MAX16491ATC+T and VT2492, the MAX16425AGCJ+T uniquely combines 25A capacity, ±2A current reporting, programmable OCP/fSW/soft-start, and Quick-PWM™ transient response - making it the only option among the three qualified for GPU core and DDR VDDQ applications demanding both high current and real-time telemetry.
Availability
MAX16425AGCJ+T is available at Aetrix Electronics and suitable for GPU core supplies, DDR memory VDDQ rails, and μServer point-of-load applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for MAX16425AGCJ+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, headquartered in Wilmington, MA, with design centers worldwide.
The MAX16425/MAX16425A product line was engineered specifically for high-density, high-efficiency point-of-load regulation in datacenter and AI infrastructure - emphasizing fast transient response, telemetry integration, and WLCSP packaging for thermal and space-constrained environments.
FAQ
What is the maximum continuous output current supported by the MAX16425AGCJ+T?
The MAX16425AGCJ+T supports 25A continuous output current, validated across its full 0.6V–3.3V output range and 4.5V–16V input range. This rating holds under specified thermal conditions: 125°C case temperature with heatsink and 200LFM airflow, per the Safe Operating Area (SOA) curves in the official datasheet. Peak current capability reaches 40A for short-duration transient events.
Does the MAX16425AGCJ+T support remote voltage sensing, and how is it implemented?
Yes, the MAX16425AGCJ+T supports differential remote voltage sensing using SENSE+ and SENSE− pins. SENSE+ connects to the load's positive output node via a Kelvin trace, while SENSE− connects to the load's ground reference - enabling regulation at the point of load and rejecting PCB plane IR drops. The device also includes open-circuit detection on these pins to prevent regulation failure if sensing traces disconnect.
Can the MAX16425AGCJ+T report output current or junction temperature, and what is the accuracy?
Yes, the MAX16425AGCJ+T provides analog telemetry via the PGM pin, configurable at startup to report either output current or junction temperature. Current reporting accuracy is ±2A across the 0–25A range; temperature reporting accuracy is ±4°C over 0°C–125°C. These values are measured and guaranteed per the Electrical Characteristics table in the datasheet, not typical-only specifications.
What protection features does the MAX16425AGCJ+T include, and how are they triggered?
The MAX16425AGCJ+T includes cycle-by-cycle positive/negative overcurrent protection (OCP), input/output overvoltage/undervoltage lockout (OVLO/UVLO/OVP/PWRGD), overtemperature protection (OTP at 130°C–150°C), and short-circuit protection. Faults pull the STAT pin low; OCP triggers at programmable ±16A–±24A thresholds, OTP activates at junction temperatures exceeding 140°C (typ), and OVP responds within 36µs to output excursions beyond ±13% of the programmed voltage.
Is the MAX16425AGCJ+T pin-compatible with other regulators in the same family, and which ones?
Yes, the MAX16425AGCJ+T shares an identical 27-bump WLCSP footprint and pinout with the MAX16491 (9A), VT2491 (15A), and VT2492 (25A), as explicitly stated in the "Flexible Design Allows Early PCB Definition" section of the datasheet. This enables scalable power design - e.g., using the same layout for 9A, 15A, or 25A variants - though functional features like telemetry and programmability differ across parts.
MAX16425AGCJ+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 27-VFBGA, WLCSP
- 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):
- 4.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 25A
- Frequency - Switching:
- Up to 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 27-WLCSP (2.2x3.78)
MAX16425AGCJ+T FAQ
1.How can I place an order for MAX16425AGCJ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16425AGCJ+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 MAX16425AGCJ+T reliable?
The price and inventory of MAX16425AGCJ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16425AGCJ+T is usually 5 days.
3.What payment methods are accepted for MAX16425AGCJ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16425AGCJ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16425AGCJ+T?
MAX16425AGCJ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16425AGCJ+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 MAX16425AGCJ+T?
For technical support, including MAX16425AGCJ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16425AGCJ+T requirements.
6.How does Aetrix verify that MAX16425AGCJ+T is sourced from the original manufacturer or authorized distributors?
All MAX16425AGCJ+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 MAX16425AGCJ+T meets industry standards.
7.What is the process for return or replacement of MAX16425AGCJ+T?
All MAX16425AGCJ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16425AGCJ+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 MAX16425AGCJ+T part is unused and in its original packaging.
Return procedure for MAX16425AGCJ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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