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Analog Devices Inc./Maxim Integrated MAX77812EWB+
- Part No.:
- MAX77812EWB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 64-WFBGA, WLBGA
- Datasheet:
-
MAX77812EWB+.pdf
- Description:
- IC REG BUCK ADJ 20A QUAD 64WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,522
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Product details
Overview
The MAX77812EWB+ from Analog Devices is a quad-phase, user-configurable buck converter delivering up to 20A total output current (5A per phase) with adaptive on-time PWM control, differential voltage sensing for ±0.5% initial accuracy, and programmable soft-start/stop slew rates from 1.25 to 60 mV/µs. It powers high-performance processors in space-constrained, single-cell Li-ion battery systems such as AR/VR headsets and game consoles.
For engineers reviewing the MAX77812EWB+ datasheet, MAX77812EWB+ pinout, MAX77812EWB+ application, or MAX77812EWB+ equivalent, key selection criteria include its 4-phase configuration flexibility (1Φ–4Φ), 3.4MHz I²C / 30MHz SPI interface, 64-bump WLP package (3.408mm × 3.368mm), and enhanced transient response for CPU/GPU core rail sequencing.
Technical Context
The MAX77812EWB+ implements an adaptive on-time PWM architecture with SKIP and forced-PWM modes to optimize light-load and heavy-load efficiency across its 2.5V–5.5V input range. Its four independent power stages support dynamic phase reconfiguration (e.g., 4Φ/2Φ+2Φ/3Φ+1Φ) via PH_CFG[2:0] pins and enable precise output voltage control from 0.250V to 1.525V in 5mV steps.
Differential remote sensing per phase ensures high DC accuracy, while Enhanced Transient Response (ETR) circuitry minimizes voltage droop during rapid load steps (e.g., 45mV max for 0.1A→4A at 100A/µs). Protection includes UVLO (2.375V rising threshold), thermal shutdown at 165°C, and per-phase current limiting with programmable PMOS peak (3.0–7.2A) and NMOS valley (2.0–5.8A) thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Current | 20A total (5A per phase); enables high-current core rails without external parallel converters |
| Input Voltage Range | 2.5V to 5.5V; compatible with single-cell Li-ion (3.0–4.35V) and USB PD sources |
| Output Voltage Range | 0.250V to 1.525V in 5mV steps; supports modern low-voltage processor cores and I/O rails |
| DC Accuracy | ±0.5% with differential sensing; reduces need for post-regulation trimming in precision applications |
| Peak Efficiency | 91% at VIN=3.8V, VOUT=1.1V; lowers thermal load in sealed portable enclosures |
| Interface Speed | 3.4MHz I²C or 30MHz SPI; allows real-time dynamic voltage scaling (DVS) during operation |
| Package | 64-bump WLP, 3.408mm × 3.368mm, 0.4mm pitch; ultra-compact footprint for mobile PCBs |
Pinout & Package
The MAX77812EWB+ uses a 3.408mm × 3.368mm, 64-bump wafer-level package (WLP) with 0.4mm pitch. Pin assignments are validated per Analog Devices' MAX77812 datasheet Rev 12 (2022).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN12 / IN34 | Input power supply inputs | Two independent input pairs (IN12 for phases 1&2; IN34 for phases 3&4) enable optimized power delivery routing |
| LX1–LX4 | Power switch node outputs | Four dedicated high-side switch outputs; each drives one buck phase's inductor |
| SNS1P–SNS4P / SNS1N–SNS4N | Differential voltage sense inputs | Per-phase remote sensing eliminates IR drop errors for tight regulation at point-of-load |
| PH_CFG0–PH_CFG2 | Phase configuration select | 3-bit encoding selects 5 user-defined phase configurations (e.g., 4Φ, 2Φ+2Φ, 3Φ+1Φ) |
| I2C_SPI_SEL | Interface mode select | High = SPI (30MHz); Low = I²C (3.4MHz); enables firmware-compatible dual-interface support |
| EN | Enable control input | Active-high logic input with internal 800kΩ pulldown; controls global startup/shutdown sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Programmable ramp-up/down slew rate | Configurable from 1.25 to 60 mV/µs via B_RU_SR/B_RD_SR registers; prevents inrush current damage during DVS transitions |
| Enhanced transient response (ETR) | Reduces load-step droop to ≤45mV (0.1A→4A, 100A/µs); maintains stable core voltage during CPU burst activity |
| 5 user-selectable phase configurations | Supports 1Φ–4Φ topologies via hardware pins; optimizes efficiency vs. current demand without firmware changes |
| Auto (SKIP/PWM) and forced PWM modes | SKIP mode cuts no-load supply current to 120µA (4Φ); forced PWM ensures fixed frequency for EMI control |
| Dual high-speed digital interfaces | 3.4MHz I²C and 30MHz SPI allow simultaneous system-level power management and real-time telemetry |
Applications
| AR/VR Headset Power Management | Game Console SoC Core Rail |
|---|---|
Use Scenario: Powers GPU and CPU cores in compact, thermally isolated AR/VR headsets with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Quad-phase buck regulator providing dynamically scaled core voltage (0.25V–1.525V) under real-time workload control. Use Value: 91% peak efficiency and 120µA no-load current extend battery runtime; small WLP package saves critical board area. | Use Scenario: Delivers 20A core power to high-performance SoCs in handheld and docked game consoles. IC Role / Device Role / Timing Role: Configurable multi-phase buck converter enabling fast DVS transitions during graphics-intensive rendering. Use Value: Programmable soft-start slew rates (1.25–60 mV/µs) prevent inrush-induced system reset; ETR minimizes voltage droop during frame-rate spikes. |
| Li-ion Battery-Powered FPGA Platform | Space-Constrained Portable Medical Monitor |
Use Scenario: Supplies configurable core and auxiliary rails to Xilinx/Intel FPGAs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Phase-reconfigurable buck IC supporting multiple VCCINT/VCCAUX voltage requirements from one IC. Use Value: 5mV output resolution and ±0.5% DC accuracy ensure FPGA timing margin compliance; 64-bump WLP fits dense HDI layouts. | Use Scenario: Provides regulated power to ARM-based processing modules in handheld ultrasound or ECG monitors. IC Role / Device Role / Timing Role: High-efficiency, low-noise buck converter powering safety-critical analog front-ends and digital subsystems. Use Value: Differential sensing and thermal/short-circuit protection meet IEC 60601 reliability requirements; low 2.5V min input supports aging battery operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2174GQ-Z | Quad-phase, 20A max, but only 1.2MHz max switching frequency; no differential sensing; I²C-only interface | Lower efficiency at high load due to lower fSW; less accurate output regulation; limited to I²C-based systems | Select when cost sensitivity outweighs need for ETR, differential sensing, or SPI interface |
| TPS549D22RSAR | Single-chip dual-phase (12A), 2.2MHz fSW, integrated MOSFETs; no phase reconfiguration; PMBus interface only | Fixed 2-phase topology; lacks 4-phase scalability and hardware-based phase selection; higher solution size | Select for simpler dual-rail designs where 12A suffices and PMBus ecosystem is established |
Compared with MP2174GQ-Z and TPS549D22RSAR, the MAX77812EWB+ uniquely combines 4-phase configurability, differential sensing for ±0.5% accuracy, and dual high-speed interfaces-enabling superior dynamic voltage scaling, tighter regulation, and flexible integration in next-gen portable processors.
Availability
The MAX77812EWB+ is available at Aetrix Electronics and suitable for AR/VR headset power management, game console SoC core rails, and Li-ion battery-powered FPGA platforms requiring stable component supply and long-term design-in support.
Supply support for MAX77812EWB+ 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 digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets.
The MAX77812EWB+ belongs to Analog Devices' MAX® power management portfolio, designed specifically for high-current, space-constrained portable applications demanding dynamic voltage scaling, multi-phase efficiency, and robust protection.
FAQ
What is the maximum continuous output current capability of the MAX77812EWB+?
The MAX77812EWB+ delivers up to 20A total continuous output current, distributed across four independently controlled phases (5A per phase). This rating assumes proper thermal management-junction temperature must remain ≤115°C for full 5A/phase operation. At higher temperatures, derating applies per the datasheet's thermal characteristics.
Does the MAX77812EWB+ support differential voltage sensing, and why does it matter?
Yes, the MAX77812EWB+ supports per-phase differential voltage sensing via dedicated SNSxP/SNSxN pins. This eliminates IR drop errors caused by PCB trace resistance, enabling ±0.5% initial output voltage accuracy-even at high currents and over extended distances to the load. It is essential for maintaining timing margins in modern low-voltage processors.
How does the MAX77812EWB+ handle load transients, and what is its typical droop performance?
The MAX77812EWB+ features Enhanced Transient Response (ETR) circuitry that actively minimizes output voltage deviation during rapid load steps. In SKIP/PWM mode with differential sensing, it achieves ≤45mV droop for a 0.1A→4A step at 100A/µs-critical for maintaining stability during CPU burst workloads without requiring excessive output capacitance.
Can the MAX77812EWB+ be configured for different phase counts, and how is this done?
Yes, the MAX77812EWB+ supports five user-selectable phase configurations (1Φ, 2Φ, 3Φ+1Φ, 2Φ+2Φ, 4Φ) via hardware pins PH_CFG0–PH_CFG2. This allows dynamic optimization of efficiency versus current demand-e.g., using 4Φ for 20A peak loads and 1Φ for light-load standby-without firmware intervention or external components.
What digital interfaces does the MAX77812EWB+ support, and what are their maximum speeds?
The MAX77812EWB+ supports both I²C and SPI interfaces. I²C operates up to 3.4MHz (high-speed mode), while SPI runs up to 30MHz. Interface selection is controlled by the I2C_SPI_SEL pin. Both support full register read/write access for configuration, telemetry, and real-time DVS control-making the MAX77812EWB+ suitable for complex power management systems.
MAX77812EWB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 64-WFBGA, WLBGA
- Packaging:
- Strip
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.25V
- Voltage - Output (Max):
- 1.525V
- Current - Output:
- 20A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-WLP (3.41x3.37)
MAX77812EWB+ FAQ
1.How can I place an order for MAX77812EWB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77812EWB+ 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 MAX77812EWB+ reliable?
The price and inventory of MAX77812EWB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77812EWB+ is usually 5 days.
3.What payment methods are accepted for MAX77812EWB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77812EWB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77812EWB+?
MAX77812EWB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77812EWB+ 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 MAX77812EWB+?
For technical support, including MAX77812EWB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77812EWB+ requirements.
6.How does Aetrix verify that MAX77812EWB+ is sourced from the original manufacturer or authorized distributors?
All MAX77812EWB+ 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 MAX77812EWB+ meets industry standards.
7.What is the process for return or replacement of MAX77812EWB+?
All MAX77812EWB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX77812EWB+, 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 MAX77812EWB+ part is unused and in its original packaging.
Return procedure for MAX77812EWB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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