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Analog Devices Inc./Maxim Integrated MAX77541AAFG+
- Part No.:
- MAX77541AAFG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 24-UFQFN
- Datasheet:
-
MAX77541AAFG+.pdf
- Description:
- IC REG BCK ADJ 3A/3A DL 24FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,368
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Product details
Overview
MAX77541AAFG+ from Analog Devices is a dual-phase, phase-configurable buck converter IC designed for high-efficiency power delivery in space-constrained battery-powered systems. It delivers up to 6A (2Φ) or two independent 3A outputs (1Φ+1Φ), supports 2.2V–5.5V input and 0.3V–5.2V programmable output, achieves ±0.5% VOUT accuracy at 25°C, and operates with 91% peak efficiency at 3.8VIN/1.1VOUT. It is used in VR/AR headsets and FPGA core rails where compact size and low-noise operation are critical.
For engineers reviewing the MAX77541AAFG+ datasheet, MAX77541AAFG+ pinout, MAX77541AAFG+ application, or MAX77541AAFG+ equivalent, key selection considerations include its adaptive COT control architecture, I²C-programmable soft-start/slew rates, spread-spectrum EMI reduction, dual-phase configuration flexibility, and built-in thermal/short-circuit protection - all within a 24-pin FC2QFN (3mm × 3mm) package.
Technical Context
The MAX77541AAFG+ implements an adaptive constant-on-time (COT) current-mode control scheme with independent phase management, enabling seamless transition between 1Φ+1Φ (dual-output) and 2Φ (single 6A output) configurations via SEL1/SEL2 pins or I²C register writes. Its internal high-side (16–32 mΩ) and low-side (10–20 mΩ) MOSFETs support dropout operation up to 98% duty cycle and prebiased startup with active output discharge.
It integrates a high-speed I²C interface (up to 1MHz), dedicated EN/POK/FPWM pins per buck channel, and configurable protections including UVLO (2.2V rising), thermal shutdown (+165°C), and short-circuit detection. Frequency options (0.5/1.0/1.6 MHz), spread-spectrum modulation, and frequency tracking further optimize noise-sensitive applications like mobile SoC power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 5.5V - supports single-cell Li⁺ and 5VDC input sources without external regulation. |
| Output Configuration | Configurable as two independent 3A bucks (1Φ+1Φ) or one 6A buck (2Φ) - enables flexible rail partitioning or high-current consolidation. |
| Output Voltage Range | 0.3V to 5.2V - covers core voltages for microprocessors, FPGAs, and memory interfaces. |
| VOUT Accuracy | ±0.5% at 25°C (default setting) - ensures stable voltage regulation for sensitive digital loads without external trimming. |
| Peak Efficiency | 91% at 3.8VIN/1.1VOUT/1.6MHz - minimizes thermal load and extends battery runtime in portable equipment. |
| Switching Frequency | 0.5 / 1.0 / 1.6 MHz (programmable) - balances efficiency, component size, and EMI performance across design requirements. |
| Package | 24-pin FC2QFN (3mm × 3mm, 0.5mm pitch) - enables ultra-compact PCB layout with <55 mm² total solution size using 2520 inductors. |
Pinout & Package
MAX77541AAFG+ is housed in a 24-pin FC2QFN package (3mm × 3mm, 0.5mm pitch, 0.75mm height), optimized for thermal performance (θJA = 36.64°C/W on 4-layer board) and high-density routing. The exposed pad (EP) must be soldered to PCB ground for optimal thermal dissipation and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1, IN2 | Power Input | Dual independent input rails - allows separate sourcing or redundancy; each supports 2.2V–5.5V. |
| LX1, LX2 | Power Switch Node | Connects to external inductor; drives high-side/low-side MOSFETs per phase. |
| SNS1, SNS2 | Output Voltage Sense | High-precision feedback inputs - enable accurate regulation and dynamic voltage scaling (DVS). |
| EN1, EN2 | Enable Control | Hardware-enable for each buck - supports independent power sequencing and rail control. |
| POK1, POK2 | Power-OK Output | Open-drain status signals - indicate valid output voltage for system-level power sequencing. |
| FPWM1, FPWM2 | Forced PWM Mode | Direct hardware override of operating mode - disables SKIP/LP-SKIP for deterministic timing. |
| SCL, SDA | I²C Interface | Standard bidirectional bus - supports register access, soft-start programming, and fault monitoring. |
| IRQB | Interrupt Output | Active-low open-drain interrupt - flags thermal warning, overcurrent, or UVLO events. |
| CFG | Configuration Select | Strap pin defining I²C address and default settings - simplifies initialization without firmware. |
| SEL1, SEL2 | Phase Configuration | Hardware-selectable mode pins - set 1Φ+1Φ vs. 2Φ operation at power-up. |
| BST1, BST2 | Bootstrap Supply | Drives high-side gate - requires external 0.1µF ceramic capacitor per phase for proper bootstrap charging. |
| PGND1, PGND2 | Power Ground | Separate ground returns per phase - reduces switching noise coupling between channels. |
| AGND | Analog Ground | Reference for sensing and bias circuits - must be isolated from noisy power grounds for accuracy. |
| VIO | I/O Supply | 1.8V supply for logic interface - decoupled with 0.1µF capacitor to ensure clean I²C signaling. |
| VDD | Core Bias Supply | Internally regulated 1.8V - powers control circuitry; UVLO threshold at 1.55V ensures safe startup. |
| SYS | Main System Supply | Primary input for internal regulators - powers VL, VDD, and logic; UVLO at 2.2V prevents brownout operation. |
| VL | Logic Bias Rail | 1.8V internal LDO - supplies gate drivers and analog blocks; independent of VDD for robustness. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive COT Control | Enables fast transient response (<10 µs recovery) and stable operation across wide VIN/VOUT/load ranges without external compensation. |
| Phase Configuration Flexibility | Hardware (SEL1/SEL2) or I²C-selectable 1Φ+1Φ vs. 2Φ modes - eliminates need for multiple BOMs in multi-platform designs. |
| Spread-Spectrum Modulation | Reduces peak EMI by >10 dB in 100 kHz–10 MHz band - simplifies compliance testing for CE/FCC in handheld devices. |
| Programmable Soft-Start/Slew Rates | Prevents inrush current and overshoot during power-up/down - configurable via I²C registers to match load capacitance and sequencing requirements. |
| Prebiased Startup & Active Discharge | Allows safe startup into precharged outputs and rapid rail discharge during shutdown - essential for FPGA and ASIC power sequencing. |
| Inductor Peak Current Limit Programming | Four selectable ILIM levels (1.6–5.2A) - optimizes inductor size and saturation margin for cost, efficiency, and thermal trade-offs. |
Applications
| Gaming Console Core Power | VR/AR Headset SoC Supply |
|---|---|
Use Scenario: Powers CPU/GPU cores in handheld gaming consoles requiring dynamic voltage scaling and low quiescent current during standby. IC Role / Device Role / Timing Role: Dual-phase buck regulator delivering 0.65V/3A and 1.1V/3A with I²C-controlled DVS and soft-start. Use Value: Enables >20% longer gameplay time via 91% peak efficiency and LP-SKIP mode (325 µA quiescent current with both phases enabled). | Use Scenario: Supplies SoC and display driver rails in lightweight VR headsets where EMI must not interfere with RF or sensor signals. IC Role / Device Role / Timing Role: Configured as 2Φ 6A buck for main SoC rail, with spread-spectrum modulation and frequency tracking to suppress narrowband noise. Use Value: Achieves FCC Class B compliance without added shielding, reducing BOM cost and mechanical complexity. |
| FPGA Core Voltage Regulation | Network Router ASIC Power |
Use Scenario: Provides tightly regulated 0.85V core voltage for Xilinx Artix-7 FPGAs in edge computing modules with strict ±1% tolerance. IC Role / Device Role / Timing Role: Single-phase 3A buck with ±0.5% factory-default VOUT accuracy and 0.1%/A load regulation. Use Value: Eliminates need for external DAC or trim resistors, reducing component count and calibration effort. | Use Scenario: Delivers 1.2V/4A to multi-core network ASICs in compact 1U routers with limited airflow and thermal budget. IC Role / Device Role / Timing Role: Dual-phase 1Φ+1Φ configuration with independent EN/POK pins for staggered power-up and fault isolation. Use Value: Thermal shutdown at +165°C and 15°C hysteresis prevent catastrophic failure during sustained traffic bursts. |
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-rail mode; lower max input (5.5V vs. 5.5V); lacks spread-spectrum and frequency tracking. | Best suited for fixed 6A rail applications without need for independent dual outputs or advanced EMI control. | Select when simplicity and TI ecosystem integration outweigh configurability and EMI features. |
| RTQ2132BGQW | Supports 1Φ+1Φ but uses voltage-mode control; lower peak efficiency (89% vs. 91%); no prebiased startup or active discharge. | Preferred for cost-sensitive industrial applications where transient response and sequencing are less critical than BOM cost. | Choose when I²C programmability and ultra-fast load transients are not required. |
Compared with TPS6521905RGER and RTQ2132BGQW, the MAX77541AAFG+ uniquely combines dual-phase configurability, adaptive COT control, spread-spectrum EMI reduction, and comprehensive I²C programmability - making it optimal for next-generation portable electronics demanding both flexibility and low-noise operation.
Availability
MAX77541AAFG+ is available at Aetrix Electronics and suitable for gaming console power delivery, VR/AR headset SoC regulation, and FPGA core voltage applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX77541AAFG+ 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 consumer markets.
The MAX77541AAFG+ belongs to Analog Devices' MAX® Power Management family, engineered specifically for ultra-compact, high-efficiency DC-DC conversion in battery-powered portable electronics with stringent EMI and thermal constraints.
FAQ
What is the maximum continuous output current supported by the MAX77541AAFG+ in dual-phase (2Φ) mode?
The MAX77541AAFG+ supports up to 6A continuous output current in dual-phase (2Φ) mode, with thermal derating applied above +105°C junction temperature. This rating assumes proper PCB layout with thermal vias under the exposed pad and adequate copper area for heat dissipation, as specified in the manufacturer's thermal guidelines for the 24-FC2QFN package.
Does the MAX77541AAFG+ support dynamic voltage scaling (DVS) via I²C?
Yes, the MAX77541AAFG+ supports dynamic voltage scaling through its high-speed I²C interface. Users can adjust output voltage in real time across the full 0.3V–5.2V range using register-based VOUT programming, enabling precise SoC performance/power tuning during operation without hardware changes.
Can the MAX77541AAFG+ operate with a precharged output capacitor?
Yes, the MAX77541AAFG+ supports prebiased startup and includes active output discharge functionality. When enabled, it safely discharges the output rail during shutdown using internal low-side MOSFETs - critical for FPGA and ASIC applications requiring controlled power sequencing and zero-voltage start conditions.
What package options are available for the MAX77541AAFG+?
The MAX77541AAFG+ is offered exclusively in the 24-pin FC2QFN package (3mm × 3mm, 0.5mm pitch). While the MAX77541 family also includes a 30-bump WLP variant, the "AAFG+" suffix specifically denotes the FC2QFN option - confirmed by Analog Devices' official ordering information and package outline documentation.
How does the MAX77541AAFG+ reduce electromagnetic interference (EMI)?
The MAX77541AAFG+ reduces EMI through three integrated methods: programmable spread-spectrum modulation (triangular or pseudo-random), frequency tracking to synchronize switching with external clocks, and selectable nominal frequencies (0.5/1.0/1.6 MHz) to avoid sensitive bands - collectively lowering peak radiated emissions by >10 dB in standard compliance tests.
MAX77541AAFG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-UFQFN
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.2V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.3V
- 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:
- 24-FC2QFN (3x3)
MAX77541AAFG+ FAQ
1.How can I place an order for MAX77541AAFG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77541AAFG+ 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 MAX77541AAFG+ reliable?
The price and inventory of MAX77541AAFG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77541AAFG+ is usually 5 days.
3.What payment methods are accepted for MAX77541AAFG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77541AAFG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77541AAFG+?
MAX77541AAFG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77541AAFG+ 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 MAX77541AAFG+?
For technical support, including MAX77541AAFG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77541AAFG+ requirements.
6.How does Aetrix verify that MAX77541AAFG+ is sourced from the original manufacturer or authorized distributors?
All MAX77541AAFG+ 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 MAX77541AAFG+ meets industry standards.
7.What is the process for return or replacement of MAX77541AAFG+?
All MAX77541AAFG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX77541AAFG+, 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 MAX77541AAFG+ part is unused and in its original packaging.
Return procedure for MAX77541AAFG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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