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Analog Devices Inc./Maxim Integrated MAX16425GCJ+
- Part No.:
- MAX16425GCJ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 27-VFBGA, WLCSP
- Datasheet:
-
MAX16425GCJ+.pdf
- Description:
- IC REG BUCK ADJ 25A 27WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:960
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Product details
Overview
MAX16425GCJ+ 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 MAX16425GCJ+ datasheet, MAX16425GCJ+ pinout, MAX16425GCJ+ application, or MAX16425GCJ+ equivalent, this page delivers verified technical context, validated pin functions, confirmed protection thresholds (OCP ±24A, OVP +13%, OTP 140°C), real-world efficiency data (96% at 1A with DCM), and two rigorously cross-checked alternative regulators for PoL design continuity.
Technical Context
The MAX16425GCJ+ employs Analog Devices' proprietary Quick-PWM™ control architecture - a pseudo-fixed-frequency, constant-on-time current-mode modulator with voltage feed-forward. This enables stable operation across 4.5V–16V input while maintaining consistent inductor operating point and fast load-step response without minimum ESR capacitor constraints.
It supports programmable configurations via PGM pin strapping: selectable reference (0.6V internal or 0.95V external), soft-start timing (1.5–6ms), switching frequency up to 1MHz, and bidirectional overcurrent limits (±16A to ±24A). Discontinuous conduction mode (DCM) is pin-enabled to boost light-load efficiency to 96% at 1A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 16V - supports wide-range industrial and server rail inputs including 5V, 12V, and 15V intermediate buses. |
| Output Voltage Range | 0.6V to 3.3V - covers GPU core (0.8–1.2V), DDR VDDQ (1.2–1.35V), and I/O supply (1.8–3.3V) requirements. |
| Max Output Current | 25A continuous - delivers full-rated power in compact 2.2mm × 3.8mm WLCSP with θJC = 0.75°C/W thermal resistance. |
| Peak Efficiency | 97% - achieved with external bias supply and optimized layout; enables high-density PoL designs with minimal thermal derating. |
| OCP Threshold Accuracy | ±20% tolerance on ±16A to ±24A programmable limits - ensures robust short-circuit and overload protection with defined hysteresis (12–18%). |
| OVP Threshold | +13% of set output voltage - halts regulation during overvoltage events; deglitch filter (25–36µs) prevents false triggering from noise. |
| Junction Temp Limit | 140°C inception with -10°C hysteresis - provides reliable thermal shutdown before permanent damage occurs under sustained overload. |
Pinout & Package
MAX16425GCJ+ is housed in 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 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE− (A1) | Negative remote-sense / external reference input | Kelvin connection to load ground or external 0.95V reference; enables precise regulation and eliminates PCB plane IR drop error. |
| STAT (A3) | Open-drain status output | Pulled low during fault conditions (OVP, UVP, OTP, OCP); indicates regulation status with 128µs delay after VOUT ramp completion. |
| PGM (B1) | Programming input / telemetry output | Resistor-capacitor strapping sets configuration (fSW, tSS, VREF, OCP); also reports junction temperature (±4°C) or output current (±2A). |
| VX (D1–D4, F1–F4) | Switching node | Connects directly to power inductor; requires low-inductance ceramic BST capacitor (0.47µF) between BST and VX for gate drive integrity. |
| VDDH (C1–C3) | Main power input | Accepts 4.5V–16V input; mandates HF decoupling capacitors placed ≤60 mils away to stay within absolute max ratings during switching transients. |
| GND (E1–E4, G1–G4) | Power ground | Dedicated low-impedance return path for 25A output current; separate from AGND to minimize noise coupling into analog circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Quick-PWM™ architecture | Enables <100µs load-transient recovery with fixed-frequency stability across input range - critical for GPU and DDR dynamic loads. |
| Differential remote sensing | SENSE+/SENSE− inputs support Kelvin connections with open-circuit detection, improving output voltage accuracy to ±0.5% load regulation. |
| Programmable bidirectional OCP | Configurable positive/negative current limits (±16A to ±24A) with hysteresis - protects against both overloads and reverse-current faults in multiphase systems. |
| Analog telemetry reporting | Single-pin PGM outputs either junction temperature (±4°C) or output current (±2A) - eliminates need for external sense resistors or ADCs in thermal/power monitoring. |
| Footprint compatibility | Shares 2.2mm × 3.8mm WLCSP land pattern with MAX16491 (9A), VT2491 (15A), and VT2492 (25A) - enables scalable PoL design reuse across power tiers. |
Applications
| GPU Core Supply | DDR Memory VDDQ |
|---|---|
|
Use Scenario: Powers GPU cores in AI accelerators and high-performance computing modules requiring rapid voltage scaling and tight regulation under 20A+ dynamic loads. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 0.8V–1.2V with sub-50µs transient response and ±0.5% static load regulation. Use Value: Quick-PWM™ architecture maintains stable switching frequency during load steps, preventing EMI spikes that disrupt adjacent high-speed SerDes lanes. |
Use Scenario: Supplies DDR4/DDR5 VDDQ rails in servers and workstations where tight voltage tolerance (±3%) and low noise are mandatory for signal integrity. IC Role / Device Role / Timing Role: Precision buck converter with differential remote sensing and ±0.5% load regulation, synchronized to system clock via programmable fSW. Use Value: Eliminates need for external current-sense amplifiers by reporting output current via PGM pin - simplifies BOM and reduces board area. |
| I/O and Chipset Supply | μServer Point-of-Load |
|
Use Scenario: Delivers 1.8V or 3.3V to PCIe switches, BMCs, and platform controllers in dense rack-mounted servers with strict thermal envelope limits. IC Role / Device Role / Timing Role: High-efficiency (97% peak) PoL regulator with DCM enabled for >96% efficiency at 1A standby load - extends system uptime during low-utilization periods. Use Value: 27-bump WLCSP package minimizes PCB area while enabling direct placement under chipset BGA - reducing trace inductance and improving PSRR. |
Use Scenario: Powers compute modules in edge microservers where board space is constrained and thermal management relies on passive cooling only. IC Role / Device Role / Timing Role: Integrated 25A buck with integrated BST switch and no external gate drivers - reduces component count and layout complexity. Use Value: Programmable soft-start (1.5–6ms) prevents inrush current surges during hot-plug events, protecting upstream power distribution networks. |
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 |
|---|---|---|---|
| MAX16425A | Same die, different PGM strapping options: supports external 0.95V reference and wider OCP range (±24A vs. ±20A on MAX16425GCJ+). | Preferred for designs requiring tighter output voltage accuracy with external reference or higher negative OCP margin for reverse-current protection. | Select MAX16425A when external VREF or extended NOCP is needed; MAX16425GCJ+ uses internal 0.6V reference and standard OCP. |
| VT2492 | 25A WLCSP buck with fixed 1.8V VCC bias, no programmable fSW or soft-start; lacks analog telemetry and differential sensing. | Suitable for cost-sensitive, fixed-configuration PoL where telemetry and remote sensing are unnecessary. | Choose VT2492 only for simplified, non-programmable deployments; MAX16425GCJ+ offers superior flexibility and monitoring capability. |
Compared with MAX16425A, MAX16425GCJ+ trades extended OCP programmability for guaranteed internal reference use, while VT2492 sacrifices configurability and telemetry to reduce BOM count - making MAX16425GCJ+ optimal for adaptive, thermally monitored server PoL designs.
Availability
MAX16425GCJ+ is available at Aetrix Electronics and suitable for GPU core supply, DDR memory VDDQ, and μServer point-of-load applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX16425GCJ+ 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 is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and computing markets with precision power and signal chain solutions.
The MAX16425GCJ+ belongs to Analog Devices' high-current, ultra-compact PoL regulator product line, designed specifically for next-generation server, AI accelerator, and high-density computing platforms demanding fast transient response and minimal PCB footprint.
FAQ
What is the maximum continuous output current supported by the MAX16425GCJ+?
The MAX16425GCJ+ delivers up to 25A of continuous output current under specified thermal conditions (200LFM airflow, heatsink). Its 2.2mm × 3.8mm WLCSP package achieves θJC = 0.75°C/W, enabling full-rated current in compact layouts. Derating applies above 125°C junction temperature or in still-air environments per SOA curves in the datasheet.
Does the MAX16425GCJ+ support remote voltage sensing, and how is it implemented?
Yes, the MAX16425GCJ+ supports true differential remote sensing using SENSE+ and SENSE− pins. SENSE+ connects to the load's positive rail via Kelvin trace, while SENSE− serves as the reference node - either tied to load ground or an external 0.95V reference. This eliminates PCB plane IR drop errors and ensures ±0.5% load regulation accuracy.
How does the MAX16425GCJ+ achieve fast transient response without compromising stability?
The MAX16425GCJ+ uses Analog Devices' Quick-PWM™ architecture - a constant-on-time, current-mode controller with voltage feed-forward. This design avoids the trade-off between transient speed and loop stability seen in fixed-frequency PWMs, delivering <100µs recovery from 6A load steps while maintaining consistent switching frequency and inductor operating point across 4.5V–16V input.
Can the MAX16425GCJ+ report output current or temperature, and what is the accuracy?
Yes, the MAX16425GCJ+ uses the PGM pin to report either output current (0–25A range, ±2A absolute accuracy) or junction temperature (0–125°C range, ±4°C accuracy). This analog telemetry eliminates external sense resistors or temperature sensors, reducing BOM cost and board area while providing real-time system health monitoring.
What protection features are integrated into the MAX16425GCJ+?
The MAX16425GCJ+ integrates cycle-by-cycle positive/negative overcurrent protection (±16A to ±24A), output overvoltage (+13%), undervoltage (−9%), overtemperature (140°C inception), input UVLO (4.15V rising), OVLO (17.3V rising), and short-circuit protection. All protections include deglitch filtering and hysteresis to prevent nuisance tripping during transients.
MAX16425GCJ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 27-VFBGA, WLCSP
- Packaging:
- Strip
- 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)
MAX16425GCJ+ FAQ
1.How can I place an order for MAX16425GCJ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16425GCJ+ 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 MAX16425GCJ+ reliable?
The price and inventory of MAX16425GCJ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16425GCJ+ is usually 5 days.
3.What payment methods are accepted for MAX16425GCJ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16425GCJ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16425GCJ+?
MAX16425GCJ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16425GCJ+ 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 MAX16425GCJ+?
For technical support, including MAX16425GCJ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16425GCJ+ requirements.
6.How does Aetrix verify that MAX16425GCJ+ is sourced from the original manufacturer or authorized distributors?
All MAX16425GCJ+ 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 MAX16425GCJ+ meets industry standards.
7.What is the process for return or replacement of MAX16425GCJ+?
All MAX16425GCJ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16425GCJ+, 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 MAX16425GCJ+ part is unused and in its original packaging.
Return procedure for MAX16425GCJ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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