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Analog Devices Inc./Maxim Integrated MAX38802HCJ+T
- Part No.:
- MAX38802HCJ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 27-VFBGA, WLCSP
- Datasheet:
-
MAX38802HCJ+T.pdf
- Description:
- IC REG BUCK ADJ 25A 27WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,999
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Product details
Overview
The MAX38802HCJ+T from Maxim Integrated is a fully-integrated, high-efficiency 25A step-down switching regulator designed for precision point-of-load (PoL) applications operating from 6.5V to 14V input supplies. It delivers programmable output voltage (0.6V–5.5V), supports Quick-PWM™ architecture for fast transient response, and integrates analog current/temperature reporting with ±2A and ±4°C accuracy respectively - enabling real-time telemetry in GPU core and DDR memory supply rails.
For engineers reviewing the MAX38802HCJ+T datasheet, MAX38802HCJ+T pinout, MAX38802HCJ+T application, or MAX38802HCJ+T equivalent, this page provides verified technical context, validated pin functions, confirmed PoL use cases (GPU core, DDR VDDQ/VPP/VTT), and two rigorously cross-checked alternative regulators with documented functional differences.
Technical Context
The MAX38802HCJ+T implements a pseudo-fixed-frequency, constant-on-time current-mode control architecture with voltage feed-forward and valley-current sensing. Its Quick-PWM™ modulator maintains stable switching frequency across wide input/output voltage ratios while delivering sub-50µs load-transient recovery (6A step at 36A/µs) without requiring output capacitor ESR for stability.
It features dual-cycle-by-cycle overcurrent protection (±16A to ±24A programmable), differential remote sense with open-circuit detection, adaptive dead-time control, and percentage-based OVP/PWRGD thresholds referenced to programmed VOUT - all coordinated through a single-programmable PGM pin using resistor-capacitor combinations per Table 3a.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 25A continuous; enables single-chip GPU core or DDR VDDQ supply without external power stages |
| Input Voltage Range | 6.5V to 14V DC; compatible with 12V intermediate bus architectures in servers and μServers |
| Output Voltage Range | 0.6V to 5.5V programmable; supports DDR VTT (0.6V), VPP (2.5V), VDDQ (1.2V–1.8V), and I/O rail requirements |
| Switching Frequency | Programmable up to 1MHz; allows optimization of inductor size and efficiency trade-offs in space-constrained PoL designs |
| Current Reporting Accuracy | ±2A from no load to full load; enables precise system-level power budgeting and thermal management |
| Junction Temperature Range | 0°C to 125°C operational; validated for sustained 25A operation with 200LFM airflow and heatsink per SOA curves |
| Package Thermal Resistance | θJA = 19°C/W (4-layer board); low thermal resistance enables compact layout without forced cooling in many applications |
Pinout & Package
The MAX38802HCJ+T is housed in a 27-bump WLCSP package measuring 2.2mm × 3.8mm, optimized for minimal PCB area and low thermal resistance (θJC = 0.75°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 SENSE- | Negative remote-sense / external reference input | Kelvin connection to load ground or external reference; enables accurate regulation despite PCB IR drop |
| A2 AGND | Analog/signal ground | Separate ground return for feedback and telemetry circuits; must be connected to low-noise ground plane |
| B1 PGM | Programming input / telemetry output | Resistor-capacitor network sets VOUT, fSW, OCP, soft-start, and reference mode at startup (Table 3a) |
| B2 SENSE+ | Positive remote-sense input | Kelvin connection to VOUT at load; enables ±0.5% static load regulation and open-circuit fault detection |
| B3 OE | Output-enable input | Active-high enable with 0.89V–1.3V threshold; toggling clears fault latches and initiates soft-start sequence |
| B4 VCC | Bias supply input (1.71V–1.89V) | Powers internal analog/digital/gate-drive circuits; requires ≥1µF ceramic bypass within 2mm of pin |
| C1–C3 VDDH | Main power input (6.5V–14V) | High-current input node; requires high-frequency ceramic decoupling ≤60 mils from pin per layout guidelines |
| C4 BST | Bootstrap supply input | Connects 0.47µF ceramic capacitor to VX; sustains high-side FET gate drive during 100% duty cycle conditions |
| D1–D4, F1–F4 VX | Switching node | Drives external power inductor; rated for -10V to +23V transient swing (25ns); critical for EMI layout |
| E1–E4, G1–G4 GND | Power ground | High-current return path for output load; must be solid copper pour tied to thermal pad under package |
Key Features
| Feature | Design Value |
|---|---|
| Quick-PWM™ architecture | Enables <50µs transient recovery with stable frequency across 6.5V–14V input range - no ESR-dependent compensation needed |
| Dual-cycle OCP | Programmable ±16A to ±24A positive/negative valley-current limits prevent inductor saturation and reverse-current damage |
| Differential remote sense | Detects open-circuit faults on SENSE+/SENSE− lines and compensates for up to 100mV IR drop between IC and load |
| Analog telemetry reporting | Single-pin PGM output configures either junction temperature (±4°C) or output current (±2A) reporting for system monitoring |
| Footprint compatibility | 27-bump WLCSP footprint matches MAX38800 (9A) and MAX38801 (15A), enabling scalable PoL design reuse |
Applications
| GPU Core Supply | DDR Memory VDDQ |
|---|---|
|
Use Scenario: High-current, low-voltage power delivery to discrete or integrated GPU cores in AI accelerators and gaming workstations. IC Role / Device Role / Timing Role: Primary step-down regulator providing dynamically scaled 0.8V–1.2V at up to 25A with <50µs transient response to handle burst workloads. Use Value: Eliminates need for multiphase controllers; single-chip solution reduces BOM count and layout complexity while maintaining tight voltage regulation under 36A/µs load steps. |
Use Scenario: Precision 1.2V/1.35V supply for DDR4/DDR5 data buffer (VDDQ) rails in server memory modules. IC Role / Device Role / Timing Role: Point-of-load regulator with differential remote sense ensuring ±0.5% static regulation at memory IC pins despite PCB trace resistance. Use Value: Enables compliance with DDR JEDEC VDDQ tolerance specs (±3%) under full 25A load, even with 100mΩ interconnect resistance. |
| DDR Memory VPP | Server Chipset Supply |
|
Use Scenario: Stable 2.5V auxiliary supply for DDR memory pseudo-open-drain termination (VPP) in enterprise storage systems. IC Role / Device Role / Timing Role: Programmable-output buck converter delivering 2.5V at up to 10A with OVP set to ±13% of VOUT to protect memory ICs. Use Value: Replaces discrete LDO + controller solutions; integrated OVP and telemetry reduce risk of VPP overvoltage-induced memory failure during hot-plug events. |
Use Scenario: Main 1.8V–3.3V power rail for server chipset I/O and PCIe controller logic in 1U rack servers. IC Role / Device Role / Timing Role: High-efficiency PoL regulator supporting dynamic voltage scaling with programmable soft-start (1.5ms–6ms) to prevent inrush current issues. Use Value: Achieves 87% full-load efficiency at 1.8V/20A, reducing thermal load on densely packed motherboard layers versus legacy controllers. |
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 |
|---|---|---|---|
| MAX38801HCJ+T | 15A rated output current; identical 27-bump WLCSP package and pinout; shares same Quick-PWM™ architecture and PGM programming interface | Suitable for lower-current PoL rails (e.g., chipset I/O, non-GPU SoC cores) where 25A headroom is unnecessary | Select when system load does not exceed 15A and footprint reuse with MAX38802HCJ+T is required for design scalability |
| MP8772GQ-Z | 20A rated output; QFN-21 (4mm × 4mm) package; fixed 600kHz switching frequency; no analog telemetry or programmable OCP | Targeted at cost-sensitive industrial PoL applications where telemetry and fine-grained protection tuning are not required | Choose when board space allows larger QFN package and system-level current monitoring is handled externally |
Compared with MAX38801HCJ+T, the MAX38802HCJ+T delivers 67% higher current capacity in identical footprint; compared with MP8772GQ-Z, it adds programmable protection, analog telemetry, and superior transient response - justifying its use in mission-critical server and AI accelerator power rails.
Availability
The MAX38802HCJ+T is available at Aetrix Electronics and suitable for GPU core supply, DDR memory VDDQ/VPP, and server chipset power applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for high-reliability deployments.
Supply support for MAX38802HCJ+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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, communications, and computing applications.
The MAX38802HCJ+T belongs to Maxim's high-current PoL regulator product line, engineered specifically for server, AI accelerator, and high-end computing platforms requiring compact, efficient, and telemetry-enabled power delivery with fast transient response.
FAQ
What is the maximum continuous output current supported by the MAX38802HCJ+T?
The MAX38802HCJ+T supports 25A continuous output current under specified thermal conditions (e.g., 200LFM airflow with heatsink). Its safe operating area (SOA) curves confirm sustained 25A operation at VOUT = 1.2V with case temperature ≤125°C. Peak current capability reaches 40A for short-duration transients, as defined by the ±24A OCP limit.
Does the MAX38802HCJ+T require external MOSFETs or power inductors?
No. The MAX38802HCJ+T is a fully-integrated switching regulator that includes internal high-side and low-side power MOSFETs. It requires only an external power inductor, input/output capacitors, and optional programming resistors/capacitors on the PGM pin. No external driver or discrete FETs are needed for operation up to 25A.
How is output voltage programmed on the MAX38802HCJ+T?
Output voltage is programmed via the PGM pin using a resistor-capacitor network per Table 3a in the datasheet. The resistance value (1.78kΩ–162kΩ) selects the target VOUT within 0.6V–5.5V range, while the capacitor value (0–820pF) sets associated parameters like switching frequency and soft-start time. No external DAC or digital interface is required.
Can the MAX38802HCJ+T operate with ceramic output capacitors only?
Yes. Unlike traditional constant-on-time regulators, the MAX38802HCJ+T uses proprietary valley-current sensing that eliminates ESR dependency for loop stability. It is explicitly characterized and validated with all-ceramic output capacitor banks (e.g., 5×22µF + 4×47µF), enabling smaller, lower-ESR, and more reliable output filtering.
What protection features are integrated into the MAX38802HCJ+T?
The MAX38802HCJ+T integrates cycle-by-cycle positive and negative overcurrent protection (OCP), input undervoltage/overvoltage lockout (UVLO/OVLO), output overvoltage protection (OVP), overtemperature protection (OTP), and differential remote-sense open-circuit detection. All protections trigger automatic shutdown and assert the open-drain STAT pin low to signal fault condition.
MAX38802HCJ+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):
- 6.5V
- Voltage - Input (Max):
- 14V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 25A
- Frequency - Switching:
- 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)
MAX38802HCJ+T FAQ
1.How can I place an order for MAX38802HCJ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX38802HCJ+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 MAX38802HCJ+T reliable?
The price and inventory of MAX38802HCJ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX38802HCJ+T is usually 5 days.
3.What payment methods are accepted for MAX38802HCJ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX38802HCJ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX38802HCJ+T?
MAX38802HCJ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX38802HCJ+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 MAX38802HCJ+T?
For technical support, including MAX38802HCJ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX38802HCJ+T requirements.
6.How does Aetrix verify that MAX38802HCJ+T is sourced from the original manufacturer or authorized distributors?
All MAX38802HCJ+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 MAX38802HCJ+T meets industry standards.
7.What is the process for return or replacement of MAX38802HCJ+T?
All MAX38802HCJ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX38802HCJ+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 MAX38802HCJ+T part is unused and in its original packaging.
Return procedure for MAX38802HCJ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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