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Analog Devices Inc./Maxim Integrated MAX26404AFODY+T
- Part No.:
- MAX26404AFODY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX26404AFODY+T.pdf
- Description:
- 36V 4A/5A/6A SYNC LOW IQ BUCK CO
- Quantity:
- Payment:
- Shipping:
Inventory:3,086
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Product details
Overview
MAX26404AFODY+T from Analog Devices is a fully integrated, synchronous Silent Switcher® buck converter delivering up to 4A continuous output current with 3V to 36V input range and fixed 5V output. It features 2.1MHz switching frequency, 10μA no-load quiescent current in skip mode, and PGOOD monitoring - enabling compact, low-EMI point-of-load power for automotive infotainment and industrial PLCs.
For engineers reviewing the MAX26404AFODY+T datasheet, MAX26404AFODY+T pinout, MAX26404AFODY+T application, or MAX26404AFODY+T equivalent, key selection criteria include its 4A rating (distinct from MAX26405/06), FC2QFN-17 package thermal performance, spread-spectrum EMI suppression, dual-phase VEA synchronization capability, and forced-PWM/skip-mode operation via SYNC pin logic.
Technical Context
The MAX26404AFODY+T implements average current-mode control with internal slope compensation, enabling stable operation across wide VIN/VOUT ratios and high noise immunity. Its 33ns minimum on-time supports large step-down conversions (e.g., 24V→3.3V) without pulse skipping, while the MAXQ® power architecture delivers ±1% output accuracy and precise transient response.
Dual-phase operation is supported via dedicated SYNCOUT (180° out-of-phase clock) and VEA (voltage-error amplifier output/current-error amplifier input) pins, enabling dynamic current sharing between controller and target ICs. Spread-spectrum modulation (±3% fSW) is factory-enabled to reduce radiated EMI peaks without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - matches MAX26404 variant; lower than MAX26405 (5A) and MAX26406 (6A) |
| Input Voltage Range | 3V to 36V - supports 12V/24V automotive and industrial rails with 99% dropout duty cycle |
| Fixed Output Voltage | 5.0V ±1% - internally set when FB tied to BIAS; eliminates external resistor divider |
| Switching Frequency | 2.1MHz (fixed) - enables sub-2mm inductors and reduces output ripple vs. 400kHz option |
| Quiescent Current | 10μA at no load in skip mode - extends battery life in always-on systems |
| Thermal Performance | θJA = 28.9°C/W (EV kit) - enabled by symmetrical FC2QFN-17 package with multiple PGND pins |
| Protection Features | Overtemperature shutdown (165°C), hiccup-mode short-circuit protection, and UVLO on SUP/BIAS |
Pinout & Package
MAX26404AFODY+T uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad (PGND-connected) and symmetrical VIN/PGND layout for optimal EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable input | High-voltage compatible (up to 42V); logic-high >1.2V activates regulator; logic-low <0.5V forces 4μA shutdown |
| 2 BST | Bootstrap supply | Connects 0.1μF capacitor between BST and LX to drive high-side MOSFET gate |
| 3,9 SUP | Main power input | Accepts 3V–36V; requires parallel 1μF + 4.7μF ceramic capacitors for low-impedance path |
| 4,5,7,8 PGND | Power ground | Four dedicated pins tied to exposed thermal pad - minimize ground bounce and improve thermal dissipation |
| 6 LX | Switch node | Connects to inductor; high-impedance when off; drives internal HS/LS FETs |
| 10 GND | Analog ground | Separate from PGND to isolate noise-sensitive feedback circuitry |
| 11 BIAS | Internal 1.8V LDO output | Powers internal circuitry; requires ≥2.2μF ceramic cap to PGND; auto-switches source from SUP to OUT |
| 12 FB | Feedback input | Tied to BIAS for fixed 5V output; used with resistor divider for adjustable 0.8V–10V outputs |
| 13 OUT | Output voltage sense | Direct connection to regulated output rail for accurate remote sensing |
| 14 VEA | Voltage-error amplifier I/O | Controller output / target input for dual-phase current sharing; must be connected between ICs |
| 15 PGOOD | Open-drain power-good | Active-low signal asserting when VOUT is within 92–96% of target; requires external pull-up |
| 16 SYNC | Mode selection & sync input | Pull to BIAS for forced-PWM; pull to GND for skip mode; accepts external clock up to 2.6MHz |
| 17 SYNCOUT | 180° out-of-phase clock | Drives target IC in dual-phase configuration; disabled in skip mode |
Key Features
| Feature | Design Value |
|---|---|
| Silent Switcher® architecture | Reduces radiated EMI by >30dB vs. conventional buck converters through balanced hot-loop layout and integrated bypass caps |
| Spread-spectrum modulation | ±3% frequency dithering centered at 2.1MHz lowers peak EMI emissions without affecting regulation or efficiency |
| Dual-phase capability | Enables 8A output using two MAX26404AFODY+T ICs with <5% current mismatch via shared VEA and SYNCOUT |
| Ultra-low IQ operation | 10μA no-load current in skip mode preserves battery runtime in standby applications like telematics modules |
| Robust protection suite | Includes hiccup-mode short-circuit response, -40°C to +125°C operation, and 99% dropout duty cycle for brownout resilience |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering 5V microcontrollers, CAN transceivers, and display drivers in head units under cold-crank (4.5V) and load-dump (36V) conditions. IC Role / Device Role / Timing Role: Primary 5V POL regulator with PGOOD sequencing and 99% dropout support. Use Value: Eliminates need for pre-regulator stages; maintains regulation during engine cranking due to wide VIN range and high duty cycle. |
Use Scenario: Generating stable 5V rail for digital I/O isolation, ADC references, and fieldbus PHYs in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Compact, low-EMI DC-DC stage replacing discrete buck solutions with external FETs. Use Value: Meets CISPR-25 Class 5 EMI limits without shielding; 3.5mm × 3.75mm footprint saves PCB space in dense I/O modules. |
| Telecom Remote Radio Unit | Medical Point-of-Care Monitor |
Use Scenario: Supplying 5V to FPGA configuration logic and SerDes interfaces in outdoor small-cell base stations operating at -40°C to +85°C. IC Role / Device Role / Timing Role: High-reliability, thermally efficient POL converter with spread-spectrum EMI reduction. Use Value: θJB = 12.0°C/W enables natural convection cooling; AEC-Q200 qualification ensures long-term field reliability. |
Use Scenario: Powering low-noise analog front-ends and touch-screen controllers in portable diagnostic devices with battery backup. IC Role / Device Role / Timing Role: Ultra-low IQ 5V regulator minimizing self-heating in sealed enclosures. Use Value: 10μA skip-mode IQ extends battery life beyond 72 hours in sleep mode; PGOOD enables safe system wake-up sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX26405AFODY+T | 5A rated output; higher ILIM threshold (6.5A–8.5A vs. 5.5A–7.0A); identical pinout and features | Better suited for higher-current loads where margin above 4A is required; same PCB layout | Select MAX26405AFODY+T when sustained load exceeds 3.5A or transient peaks exceed 6A |
| LM61460QWRNXTQ1 | Automotive-grade (AEC-Q100); 6A output; 2.1MHz switching; but lacks spread-spectrum and dual-phase VEA/SYNCOUT | Targeted at automotive ADAS where functional safety (ASIL-B) is mandatory; no dual-phase current sharing | Choose LM61460QWRNXTQ1 only if AEC-Q100 qualification and ASIL-B compliance are required over EMI and multiphase flexibility |
Compared with MAX26405AFODY+T, the MAX26404AFODY+T offers tighter current-limit tolerance and lower thermal stress at 4A loads; versus LM61460QWRNXTQ1, it provides superior EMI control and dual-phase scalability but lacks automotive qualification.
Availability
MAX26404AFODY+T is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLCs, telecom remote radio units, and medical point-of-care monitors requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX26404AFODY+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX26404/MAX26405/MAX26406 family belongs to Analog Devices' Silent Switcher® power portfolio, designed specifically for space-constrained, low-EMI applications demanding high efficiency and robustness across harsh environments.
FAQ
What output voltage does the MAX26404AFODY+T deliver?
The MAX26404AFODY+T delivers a fixed 5.0V output with ±1% accuracy in PWM mode at no load. This is achieved by connecting the FB pin directly to the internal 1.8V BIAS supply - eliminating external resistors. The device also supports adjustable outputs from 0.8V to 10V using an external resistor divider on the FB pin, but the MAX26404AFODY+T variant is configured for 5V operation per its ordering code.
Does the MAX26404AFODY+T support dual-phase operation?
Yes, the MAX26404AFODY+T supports dual-phase operation via dedicated SYNCOUT (180° out-of-phase clock) and VEA (voltage-error amplifier output) pins. When configured as a controller, it drives a second MAX26404AFODY+T (target) to achieve up to 8A total output with dynamic current sharing. Dual-phase operation requires forced-PWM mode (SYNC tied to BIAS) and proper VEA interconnection - skip mode disables SYNCOUT.
What is the maximum input voltage the MAX26404AFODY+T can handle?
The MAX26404AFODY+T supports an absolute maximum input voltage of +42V on the SUP pin, with recommended operation from 3V to 36V. Its 99% maximum duty cycle allows regulation down to VIN ≈ VOUT (e.g., 5.5V input for 5V output), making it suitable for automotive cold-crank scenarios where input may dip to 4.5V. Internal UVLO thresholds (2.945V rising, 2.655V falling) prevent erratic startup at low VIN.
How does the MAX26404AFODY+T reduce electromagnetic interference?
The MAX26404AFODY+T reduces EMI through three integrated techniques: Silent Switcher® architecture (balanced hot-loop layout with integrated bypass capacitors), spread-spectrum frequency modulation (±3% dithering at 2.1MHz), and symmetrical FC2QFN-17 package pinout that minimizes loop area. These features collectively suppress radiated emissions below CISPR-25 Class 5 limits without requiring external filters or shielding - verified in standard 4-layer EV kit testing.
What thermal performance can be expected from the MAX26404AFODY+T in a typical layout?
In a standard 4-layer evaluation board layout, the MAX26404AFODY+T achieves a junction-to-board thermal resistance (θJB) of 12.0°C/W and junction-to-ambient (θJA) of 28.9°C/W. With its exposed thermal pad soldered to a 250mm² copper pour, the device sustains 4A continuous output at +85°C ambient without derating. The symmetrical PGND pin arrangement and bottom-thermal-pad design enable efficient heat transfer to the PCB, critical for sealed industrial enclosures.
MAX26404AFODY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Silent Switcher®
- Package/Case:
- 17-PowerWFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V (3.3V)
- Voltage - Output (Max):
- 10V
- Current - Output:
- 4A
- Frequency - Switching:
- 400kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 17-FC2QFN (3.5x3.75)
MAX26404AFODY+T FAQ
1.How can I place an order for MAX26404AFODY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX26404AFODY+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 MAX26404AFODY+T reliable?
The price and inventory of MAX26404AFODY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX26404AFODY+T is usually 5 days.
3.What payment methods are accepted for MAX26404AFODY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX26404AFODY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX26404AFODY+T?
MAX26404AFODY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX26404AFODY+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 MAX26404AFODY+T?
For technical support, including MAX26404AFODY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX26404AFODY+T requirements.
6.How does Aetrix verify that MAX26404AFODY+T is sourced from the original manufacturer or authorized distributors?
All MAX26404AFODY+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 MAX26404AFODY+T meets industry standards.
7.What is the process for return or replacement of MAX26404AFODY+T?
All MAX26404AFODY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX26404AFODY+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 MAX26404AFODY+T part is unused and in its original packaging.
Return procedure for MAX26404AFODY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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