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Analog Devices Inc./Maxim Integrated MAX16425GCJ+T
- Part No.:
- MAX16425GCJ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 27-VFBGA, WLCSP
- Datasheet:
-
MAX16425GCJ+T.pdf
- Description:
- IC REG BUCK ADJ 25A 27WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,670
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Product details
Overview
MAX16425GCJ+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 in GPU core and DDR memory supply applications.
For engineers reviewing the MAX16425GCJ+T datasheet, MAX16425GCJ+T pinout, MAX16425GCJ+T application, or MAX16425GCJ+T equivalent, this page delivers verified electrical specs, WLCSP package layout, programmable OCP/soft-start/frequency settings, analog current/temperature reporting, and remote sensing implementation details critical for PoL power delivery design.
Technical Context
The MAX16425GCJ+T implements a pseudo-fixed-frequency, constant-on-time current-mode control architecture with voltage feed-forward, enabling stable operation across wide VIN/VOUT ratios without minimum ESR capacitor requirements. Its valley-current sensing eliminates traditional ESR dependency while maintaining fast load-step response.
It supports both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), with DCM enabled via pin-strapping to improve light-load efficiency down to 1A. The device integrates boost switch, differential remote sense with open-circuit detection, and dual-cycle-by-cycle overcurrent protection with ±24A positive/negative thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 16V - supports 5V, 12V intermediate bus architectures with UVLO at 4.15V (rising) and OVLO at 17.3V (rising). |
| Output Voltage Range | 0.6V to 3.3V - programmable via external resistor divider; internal reference tolerance ±0.5% at 35°C. |
| Max Output Current | 25A - rated for sustained load; peak current capability up to 40A for transient handling. |
| Switching Frequency | Programmable up to 1MHz - enables compact magnetics; DCM lowers frequency to 30kHz minimum for audible-noise suppression. |
| OCP Threshold | Programmable ±16A to ±24A - valley-current-based positive/negative cycle-by-cycle protection with 15% hysteresis. |
| Thermal Protection | OTP at 140°C (inception) with –20°C hysteresis - ensures safe shutdown before junction exceeds 150°C absolute max. |
| Reporting Accuracy | ±2A current reporting (0–25A range); ±4°C junction temperature reporting - enables closed-loop telemetry without external sensors. |
Pinout & Package
The MAX16425GCJ+T is housed in a 27-bump WLCSP package (2.2mm × 3.8mm) with low thermal resistance (θJC = 0.75°C/W) optimized for high-power density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE− | Negative remote-sense / external reference input | Kelvin connection point to load ground or external reference; sets regulation reference point independent of PCB IR drop. |
| SENSE+ | Positive remote-sense input | Connects directly to VOUT at load; enables <1% output regulation accuracy under varying load currents and board impedance. |
| OE | Output-enable control input | Active-high logic input (0.89V–1.3V threshold); toggling clears fault latches; requires 20kΩ series resistor for 1.8V drive. |
| STAT | Open-drain status output | Pulled low during OVP/UVP/OTP faults or startup; releases high when output is within ±9% of target and regulation is stable. |
| PGM | Programming/telemetry bidirectional pin | Configures soft-start, frequency, OCP, and reference via R/C network at startup; also reports analog current or temperature. |
| VX | Switching node | High-current path to power inductor; 24 bumps dedicated to minimize parasitic inductance and thermal resistance. |
| VDDH | Main power input (4.5–16V) | Requires HF ceramic decoupling ≤60 mils away; absolute max rating 23V (AC/DC) with 25ns pulse limit. |
| BST | Bootstrap supply input | Connects 0.47μF ceramic cap to VX; supplies gate drive for high-side FET; differential rating ±2.5V vs VX. |
| VCC | Analog/digital bias supply (1.71–1.89V) | Must be tightly regulated; powers control circuitry, comparators, and reference; bypassed with ≥1μF ceramic cap. |
| GND / AGND | Power and analog ground returns | Separate GND (power return) and AGND (signal reference) pins reduce noise coupling into feedback path. |
Key Features
| Feature | Design Value |
|---|---|
| Quick-PWM™ architecture | Constant-on-time control with voltage feed-forward enables <50µs load-transient recovery while maintaining stable switching frequency across 4.5–16V input range. |
| Differential remote sensing | SENSE+/SENSE− inputs support Kelvin connections to load, eliminating PCB plane IR drop errors and ensuring ±0.5% regulation accuracy at point-of-load. |
| Programmable protection thresholds | OCP, soft-start time (1.5–6ms), switching frequency (up to 1MHz), and reference voltage (0.6V or 0.95V) configured via single PGM pin R/C network. |
| Analog telemetry output | PGM pin reports real-time output current (±2A accuracy) or junction temperature (±4°C) - eliminates need for external current shunt or thermal sensor. |
| Integrated boost switch | On-chip high-side gate driver and bootstrap circuit reduce BOM count; only external BST capacitor required for full 25A operation. |
Applications
| GPU Core Supply | DDR Memory VDDQ |
|---|---|
Use Scenario: High-current, low-voltage rail for modern discrete GPUs requiring rapid dynamic load response during compute bursts. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 0.8–1.2V at up to 25A with sub-50µs transient recovery via Quick-PWM™. Use Value: Maintains GPU voltage within ±3% during 6A/µs load steps, preventing throttling or instability in AI/graphics workloads. |
Use Scenario: Precision 1.2V/1.35V supply for DDR4/DDR5 memory modules where tight voltage tolerance impacts signal integrity and timing margins. IC Role / Device Role / Timing Role: Point-of-load regulator with differential remote sense correcting for PCB trace losses between VRM and memory ICs. Use Value: Achieves <±0.5% output regulation at memory pins, enabling reliable operation at DDR5 data rates >6400 MT/s. |
| Servers / μServers | Chipset Power Delivery |
Use Scenario: Compact, high-efficiency 12V-to-1.8V conversion for CPU I/O die or baseboard management controllers in space-constrained server blades. IC Role / Device Role / Timing Role: Single-chip 25A buck converter replacing multi-phase controller + DrMOS solutions in low-footprint designs. Use Value: Reduces solution size by 40% vs discrete phase-boost designs while maintaining >92% efficiency at 15A load. |
Use Scenario: Dedicated 3.3V or 1.8V rail for server chipset, PCIe retimers, or BMC peripherals requiring clean, well-regulated power. IC Role / Device Role / Timing Role: Secondary PoL regulator with programmable soft-start and OVP to coordinate power sequencing with main CPU VRM. Use Value: Enables precise power-up timing alignment (±128µs STAT assertion delay) and prevents brownout-induced configuration errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16491ETA+T | 9A rated, same WLCSP footprint and pinout; lacks analog telemetry and programmable OCP; fixed 0.6V reference only. | Targeted at lower-current I/O rails where telemetry and fine-grained protection are not required. | Select when system load is ≤9A and cost-sensitive; retains layout compatibility but sacrifices configurability. |
| VT2492 | 25A rating, identical functional scope and WLCSP package; manufactured by Vicor; different programming interface and fault signaling behavior. | Used in Vicor-qualified systems requiring second-source availability with matching electrical performance. | Choose for supply chain diversification where identical 25A PoL capability is needed but Vicor ecosystem integration is preferred. |
Compared with MAX16491ETA+T and VT2492, the MAX16425GCJ+T uniquely combines 25A capacity, analog current/temperature telemetry on PGM, and full programmability of OCP/soft-start/frequency - making it optimal for high-performance, telemetry-aware server and GPU power designs.
Availability
MAX16425GCJ+T is available at Aetrix Electronics and suitable for servers/μservers, GPU core supplies, DDR memory VDDQ/VPP/VTT rails, and industrial PoL applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX16425GCJ+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 is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision, industrial, automotive, and communications markets with innovation since 1965.
The MAX16425GCJ+T belongs to Analog Devices' high-current, high-efficiency PoL regulator product line, designed specifically for demanding server, AI accelerator, and memory subsystem power delivery where fast transient response, telemetry, and compact packaging are essential.
FAQ
What is the maximum output current rating of the MAX16425GCJ+T?
The MAX16425GCJ+T is rated for continuous 25A output current under specified thermal conditions (200LFM airflow, heatsink). Its peak current capability reaches 40A for short-duration load transients, enabling robust handling of GPU and CPU burst loads without derating. The device includes cycle-by-cycle overcurrent protection with programmable thresholds from ±16A to ±24A to safeguard against sustained overload.
Does the MAX16425GCJ+T support remote voltage sensing?
Yes, the MAX16425GCJ+T supports true differential remote sensing using dedicated SENSE+ and SENSE− pins. This allows Kelvin connections directly at the load to eliminate PCB trace IR drop errors, achieving better than ±0.5% output voltage regulation accuracy at the point-of-load - critical for DDR5 VDDQ and GPU core applications where tight voltage margins are mandatory.
How is the switching frequency programmed on the MAX16425GCJ+T?
The MAX16425GCJ+T switching frequency is programmed via an external resistor connected to the PGM pin, with 12 supported values ranging from 300kHz to 1MHz. The selected frequency is latched at startup and remains fixed during operation. This programmability enables optimization of efficiency, EMI, and inductor size - for example, 1MHz operation allows use of smaller 200nH inductors for 1.05V outputs.
Can the MAX16425GCJ+T report output current or temperature?
Yes, the MAX16425GCJ+T provides analog telemetry through its PGM pin: it can be configured to output either output current (0–25A range, ±2A accuracy) or junction temperature (0–125°C range, ±4°C accuracy). This eliminates the need for external current shunts or thermal sensors, simplifying system monitoring and enabling real-time thermal/power management in server and AI hardware.
What protection features does the MAX16425GCJ+T include?
The MAX16425GCJ+T integrates comprehensive protection: positive/negative cycle-by-cycle overcurrent (OCP), input/output overvoltage (OVP) and undervoltage (UVP), overtemperature (OTP at 140°C), input UVLO/OVLO, and open-circuit detection on SENSE lines. Faults trigger STAT pin assertion and automatic latch-off; OE pin toggle resets protection latches without cycling input power.
MAX16425GCJ+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)
MAX16425GCJ+T FAQ
1.How can I place an order for MAX16425GCJ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16425GCJ+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 MAX16425GCJ+T reliable?
The price and inventory of MAX16425GCJ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16425GCJ+T is usually 5 days.
3.What payment methods are accepted for MAX16425GCJ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16425GCJ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16425GCJ+T?
MAX16425GCJ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16425GCJ+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 MAX16425GCJ+T?
For technical support, including MAX16425GCJ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16425GCJ+T requirements.
6.How does Aetrix verify that MAX16425GCJ+T is sourced from the original manufacturer or authorized distributors?
All MAX16425GCJ+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 MAX16425GCJ+T meets industry standards.
7.What is the process for return or replacement of MAX16425GCJ+T?
All MAX16425GCJ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16425GCJ+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 MAX16425GCJ+T part is unused and in its original packaging.
Return procedure for MAX16425GCJ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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