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Analog Devices Inc./Maxim Integrated MAX77540AAWV+
- Part No.:
- MAX77540AAWV+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 30-WFBGA, WLBGA
- Datasheet:
-
MAX77540AAWV+.pdf
- Description:
- IC REG BUCK ADJ 3A/3A DL 30WLP
- Quantity:
- Payment:
- Shipping:
Inventory:230
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Product details
Overview
The MAX77540AAWV+ from Analog Devices is a dual-phase, 6A high-efficiency step-down converter with adaptive COT current-mode control. It supports configurable operation as two independent 3A buck regulators or one 6A multiphase buck, delivers 0.5V–5.2V outputs from 4V–16V input, achieves ±0.5% VOUT accuracy at 25°C, and operates with 94% peak efficiency at 7.6VIN/3.3VOUT/1MHz - ideal for powering microprocessors and FPGAs in space-constrained battery-powered systems.
For engineers reviewing the MAX77540AAWV+ datasheet, MAX77540AAWV+ pinout, MAX77540AAWV+ application, or MAX77540AAWV+ equivalent, key selection considerations include phase configuration flexibility (1Φ+1Φ vs. 2Φ), I²C-programmable soft-start/slew rates, spread-spectrum EMI reduction, and support for ALT_IN low-voltage input switching in WLP package variants.
Technical Context
The MAX77540AAWV+ implements an adaptive constant-on-time (COT) current-mode control architecture with dual synchronous buck stages, enabling seamless transition between forced-PWM, SKIP, and low-power SKIP modes. Its phase-configuration logic (SEL1/SEL2 pins) determines whether LX1/LX2 operate as independent 3A channels or interleaved 6A output.
Built-in protections include undervoltage lockout (UVLO), thermal shutdown at +165°C, short-circuit detection, and active output discharge. The device integrates dedicated VL and VDD bias rails, supports pre-biased startup, and provides FPWM1B/FPWM2B pins for hardware mode selection independent of I²C commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 16V - enables direct regulation from 3-cell Li+, USB-C PD, and 12VDC rails without intermediate conversion. |
| Output Voltage Range | 0.5V to 5.2V - covers core voltages for modern microprocessors, FPGAs, and ASICs with factory-default resistor-set options. |
| Output Current Capability | Two 3A phases or one 6A multiphase output - selectable via SEL1/SEL2 pins; supports dynamic load sharing and reduced output ripple. |
| VOUT Accuracy | ±0.5% at 25°C (default VOUT) - ensures tight regulation critical for low-voltage digital supply rails. |
| Peak Efficiency | 94% at 7.6VIN, 3.3VOUT, 1MHz - minimizes power loss and thermal stress in compact portable designs. |
| Switching Frequency | 0.5/1.0/1.6MHz nominal - programmable via register or fixed by external resistor; supports frequency tracking and spread-spectrum modulation. |
| I²C Interface | High-speed I²C with 3 slave address options (ADDR pin selectable) - enables dynamic voltage scaling, fault monitoring, and configuration without additional GPIOs. |
Pinout & Package
The MAX77540AAWV+ is packaged in a 30-bump Wafer-Level Package (WLP) measuring 2.51mm × 2.31mm, optimized for ultra-compact PCB layouts. This package uses flip-chip bump technology with bottom-side terminations and requires precise land pattern adherence per Application Note 1891 (Outline 21-100414).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1 / IN2 | Main input power rails | Independent 4V–16V inputs for each buck stage; supports split-input configurations or redundancy. |
| LX1 / LX2 | Power switch node outputs | Connect to external inductors; each drives one 3A phase; supports 1Φ+1Φ or 2Φ interleaved operation. |
| SNS1 / SNS2 | Output voltage sense inputs | Enable precision feedback for VOUT1/VOUT2; support remote sensing and resistor-programmable default voltages. |
| EN1 / EN2 | Individual enable inputs | Hardware-controlled on/off for each buck channel; allows staggered startup and independent power sequencing. |
| POK1 / POK2 | Power-good status outputs | Open-drain signals indicating regulated output stability; used for system-level power sequencing and fault indication. |
| FPWM1B / FPWM2B | Forced PWM mode controls | Active-low pins that override internal mode logic to enforce continuous PWM operation - critical for noise-sensitive analog circuits. |
| SEL1 / SEL2 | Phase configuration select | Digital inputs determining 1Φ+1Φ (dual-output) or 2Φ (single 6A output) topology; sets internal current-sharing behavior. |
| ADDR | I²C slave address select | Configures one of three I²C addresses (0x68, 0x69, 0x6A); enables multiple MAX77540 devices on same bus. |
| IRQB | Interrupt request output | Open-drain alert pin signaling thermal warnings, overcurrent, UVLO, or other faults; supports interrupt-driven system response. |
| ALT_IN | Alternative low-voltage input | Enables automatic switchover to auxiliary 2.7V–5.5V supply when main SYS rail drops below threshold - improves system resilience. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive COT current-mode control | Delivers fast transient response and stable regulation across wide VIN/VOUT ranges without external compensation components. |
| Programmable soft-start/stop and slew rates | Prevents inrush current and voltage overshoot during power-up/down; configurable via I²C registers for system-specific timing requirements. |
| Spread-spectrum and frequency tracking | Reduces peak EMI by >10dB in sensitive RF or audio subsystems; tracks external clock source to eliminate beat frequencies. |
| Pre-biased startup and active output discharge | Allows safe power-up into pre-charged loads and rapid output discharge upon shutdown - essential for multi-rail sequencing compliance. |
| Dedicated EN/POK/FPWM pins | Enables full hardware-based power management without firmware dependency - simplifies boot sequence and safety-critical applications. |
Applications
| Mobile Application Processor Power | FPGA Core & I/O Bank Supply |
|---|---|
Use Scenario: Powers ARM-based application processors (e.g., Qualcomm Snapdragon, MediaTek Dimensity) requiring tightly regulated 0.8V core and 1.2V I/O rails from single-cell or USB-C PD input. IC Role / Device Role / Timing Role: Dual-phase buck regulator delivering 3A per rail with independent enable/control; manages dynamic voltage/frequency scaling (DVFS) via I²C. Use Value: Achieves <55mm² total solution size and 94% efficiency at 3.3VOUT, extending battery life while meeting JEDEC thermal limits for handheld devices. | Use Scenario: Supplies configurable core (0.75–0.95V) and I/O (1.2–3.3V) voltages to Xilinx Artix-7 or Intel Cyclone V FPGAs in portable test equipment. IC Role / Device Role / Timing Role: Phase-configurable buck converter operating in 1Φ+1Φ mode; uses SEL1/SEL2 to isolate domains and POK1/POK2 for sequenced power-up. Use Value: ±0.5% VOUT accuracy ensures FPGA configuration stability; spread-spectrum mode suppresses switching noise coupling into high-speed transceivers. |
| PCIe® Add-in Card Power | USB-C Power Delivery Sink |
Use Scenario: Provides 12V-to-3.3V/5V conversion for NVMe SSDs or GPU accelerators on PCIe cards with strict EMI limits and thermal constraints. IC Role / Device Role / Timing Role: 2Φ 6A buck operating in interleaved mode; reduces input/output ripple and inductor size versus single-phase alternatives. Use Value: 98% max duty cycle dropout operation maintains regulation down to 3.3VOUT from 4V input - critical for brownout resilience in server backplanes. | Use Scenario: Serves as primary DC-DC stage in USB-C PD sink devices (e.g., monitors, docking stations) accepting up to 20V input and delivering multiple regulated outputs. IC Role / Device Role / Timing Role: Dual-input buck converter using IN1 for main PD rail and ALT_IN for legacy 5V adapter fallback; auto-switches based on VSWO threshold. Use Value: ALT_IN switchover at 2.7–2.9V ensures uninterrupted operation during PD negotiation gaps; quiescent current <5μA in shutdown extends standby time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-phase buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6521905RGER | Single 6A output only; no 1Φ+1Φ dual-output mode; lower max input (5.5V); integrated LDOs not present in MAX77540AAWV+ | Targeted at USB-C PD source applications with fixed 5V/9V/15V/20V outputs; lacks programmable VOUT range and ALT_IN capability | Select when board space is constrained and only 6A single-rail output is needed; avoid if dual independent rails or wide VIN are required. |
| RTQ2134BGQW | Fixed 3A per phase; no I²C interface; no spread-spectrum or frequency tracking; smaller 20-pin QFN (3mm × 4mm) | Designed for cost-sensitive industrial HMIs and PLC I/O modules; relies on resistor programming only - no dynamic reconfiguration | Choose for simple, firmware-free designs where EMI reduction and voltage scaling are non-critical; verify thermal performance at 3A continuous per phase. |
Compared with TPS6521905RGER and RTQ2134BGQW, the MAX77540AAWV+ uniquely combines dual-phase configurability, 4V–16V input, I²C programmability, and ALT_IN switchover - making it optimal for adaptive, multi-rail, battery-powered systems requiring design flexibility and robustness.
Availability
The MAX77540AAWV+ is available at Aetrix Electronics and suitable for mobile processor power, FPGA supply, PCIe add-in card power, and USB-C PD sink applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX77540AAWV+ 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 technologies, serving industrial, automotive, communications, and consumer markets with precision power, signal chain, and RF solutions.
The MAX77540AAWV+ belongs to Analog Devices' MAX® power management product line, engineered specifically for high-density, multi-rail power delivery in portable and embedded systems demanding efficiency, configurability, and reliability under dynamic load conditions.
FAQ
What is the package type and dimensions of the MAX77540AAWV+?
The MAX77540AAWV+ uses a 30-bump Wafer-Level Package (WLP) with dimensions of 2.51mm × 2.31mm and 0.4mm bump pitch. It follows outline number 21-100414 and requires the land pattern specified in Application Note 1891. This ultra-compact package enables minimal PCB footprint and high-density integration in space-constrained designs such as smartphones and wearables.
Does the MAX77540AAWV+ support both single-rail and dual-rail configurations?
Yes, the MAX77540AAWV+ supports both configurations via SEL1 and SEL2 pin states. In 1Φ+1Φ mode, it delivers two independent 3A outputs (VOUT1 and VOUT2); in 2Φ mode, it interleaves both phases to deliver a single 6A output. This flexibility allows designers to optimize for either multi-domain power sequencing or higher-current single-rail needs without changing the bill of materials.
How does the ALT_IN feature function on the MAX77540AAWV+?
The ALT_IN pin on the MAX77540AAWV+ enables automatic switchover to an auxiliary 2.7V–5.5V supply when the main SYS rail falls below the 2.7–2.9V threshold (with 100mV hysteresis). This feature is available only in the WLP package and ensures uninterrupted operation during USB-C PD renegotiation or primary rail brownouts - enhancing system reliability in portable power sinks.
What protection features are integrated into the MAX77540AAWV+?
The MAX77540AAWV+ integrates undervoltage lockout (UVLO), thermal shutdown at +165°C, short-circuit protection, pre-biased startup, and active output discharge. It also provides thermal warning interrupts at +120°C and +140°C via IRQB, allowing firmware to throttle loads before shutdown. These protections ensure safe operation across industrial and automotive temperature ranges without external supervision circuitry.
Can the MAX77540AAWV+ be used without I²C communication?
Yes, the MAX77540AAWV+ operates fully in hardware-only mode using resistor-programmed default VOUT values and pin-strapped configuration (SEL1/SEL2, ADDR, EN1/EN2). I²C is optional and used only for dynamic adjustments like soft-start timing, voltage scaling, or fault logging. All critical functions - including enable, power-good, and FPWM mode - remain accessible via dedicated pins even with I²C disabled.
MAX77540AAWV+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 30-WFBGA, WLBGA
- Packaging:
- Strip
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.2V
- Current - Output:
- 3A, 3A
- Frequency - Switching:
- 500kHz, 1MHz, 1.6MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 30-WLP (2.51x2.31)
MAX77540AAWV+ FAQ
1.How can I place an order for MAX77540AAWV+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77540AAWV+ 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 MAX77540AAWV+ reliable?
The price and inventory of MAX77540AAWV+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77540AAWV+ is usually 5 days.
3.What payment methods are accepted for MAX77540AAWV+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77540AAWV+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77540AAWV+?
MAX77540AAWV+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77540AAWV+ 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 MAX77540AAWV+?
For technical support, including MAX77540AAWV+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77540AAWV+ requirements.
6.How does Aetrix verify that MAX77540AAWV+ is sourced from the original manufacturer or authorized distributors?
All MAX77540AAWV+ 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 MAX77540AAWV+ meets industry standards.
7.What is the process for return or replacement of MAX77540AAWV+?
All MAX77540AAWV+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX77540AAWV+, 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 MAX77540AAWV+ part is unused and in its original packaging.
Return procedure for MAX77540AAWV+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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