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Analog Devices Inc./Maxim Integrated MAX20429CAFNA/VY+
- Part No.:
- MAX20429CAFNA/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 18-PowerWFQFN
- Datasheet:
-
MAX20429CAFNA/VY+.pdf
- Description:
- IC REG BCK ADJ 6A/6A DL 18FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:364
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Product details
Overview
MAX20429CAFNA/VY+ from Analog Devices is a dual, high-efficiency synchronous buck converter delivering up to 6A per output with factory-preset ±1% output voltage accuracy, 2.1MHz/3.2MHz fixed-frequency PWM operation, and integrated low-RDS(on) MOSFETs (18mΩ high-side, 12mΩ low-side). It operates from 3V–5.5V input and supports 0.5V–3.8V output in fine 12.5mV/50mV steps-ideal for point-of-load regulation of SoC and MCU core supplies.
For engineers reviewing the MAX20429CAFNA/VY+ datasheet, MAX20429CAFNA/VY+ pinout, MAX20429CAFNA/VY+ application, or MAX20429CAFNA/VY+ equivalent, this page delivers verified technical context, validated pin functions, confirmed AEC-Q100 qualification, exact soft-start/RESET timing options, and real-world layout guidance for first-pass success in automotive and industrial embedded designs.
Technical Context
The MAX20429CAFNA/VY+ implements peak current-mode control with MAXQ™ architecture for precision transient response and stable phase margin across wide load/line/temperature ranges. Its dual independent channels feature separate EN1/EN2 enable inputs, open-drain RESET1/RESET2 outputs with programmable timeout (1024–32768 clocks), and internal 0.6V reference for resistor-adjustable outputs.
It integrates spread-spectrum clocking (±3%), SYNC input for external clock synchronization or skip-mode entry, and factory-programmable soft-start ramp rates (4–32 clocks/step). Thermal shutdown activates at 165°C with 15°C hysteresis, and overcurrent protection uses channel-specific current-limit thresholds (7.8–10A for 6A variant).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 6A per channel-supports high-current SoC core rails without external power stages. |
| Input Voltage Range | 3.0V to 5.5V-compatible with standard 3.3V/5V intermediate bus architectures. |
| Output Voltage Range | 0.5V–3.8V in 12.5mV steps (≤1.5875V) or 50mV steps (≥1.6V)-enables precise core voltage tuning. |
| Switching Frequency | 2.1MHz or 3.2MHz-enables all-ceramic design with compact 220nH inductors and minimal EMI filtering. |
| Output Voltage Accuracy | ±1% over line/load/temperature-eliminates need for 0.1% feedback resistors in production. |
| Efficiency | Up to 96% @ 5V→3.3V, 90% @ 5V→1V-reduces thermal load in space-constrained modules. |
| Operating Temperature | −40°C to +125°C ambient-qualified per AEC-Q100 Grade 1 for automotive under-hood use. |
| Package | 18-pin FCQFN (3mm × 3.5mm, 0.5mm pitch)-supports high-density PCB layouts with exposed thermal pad. |
Pinout & Package
MAX20429CAFNA/VY+ is housed in an 18-pin FCQFN package (3mm × 3.5mm, 0.5mm pitch) with exposed thermal pad (PGND pins 5,6,7,8,9) for enhanced thermal performance in automotive and industrial applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2 | Active-high enable inputs | Independent channel activation; rising edge initiates soft-start, falling edge triggers soft-shutdown or Hi-Z mode. |
| RESET1, RESET2 | Open-drain active-low reset outputs | Assert low when VOUT falls outside 92–108% window; timeout configurable via factory programming (1024–32768 clocks). |
| LX1, LX2 | Switch node connections | Drive external inductors; require tight layout to minimize ringing and EMI-rise/fall time <1ns at 2A. |
| PV1, PV2 | Power input supplies | Separate 3V–5.5V inputs per channel; each requires ≥10µF ceramic capacitor to PGND2/PGND1. |
| OUT1, OUT2 | Feedback inputs | Connect directly to output capacitors; support resistor-divider adjustment using internal 0.6V reference. |
| SYNC | Mode control/synchronization input | Logic-high enables forced-PWM; external clock (1.9–2.3MHz or 2.8–3.6MHz) synchronizes switching frequency. |
| VDD, GND | Analog supply and ground | VDD powers internal analog circuitry; must be decoupled with 2.2µF X7R cap via 2Ω series resistor to PV rail. |
| PGND1, PGND2, PGND | Power ground terminals | Multiple dedicated ground pins reduce ground bounce and improve current return path integrity for each channel. |
Key Features
| Feature | Design Value |
|---|---|
| MAXQ™ Power Architecture | Guarantees stable dynamic performance across worst-case conditions-no derating required for transient response. |
| Dual Independent Regulation | Each channel has dedicated EN, RESET, LX, PV, and PGND-enables asymmetric rail sequencing and fault isolation. |
| Factory-Presets & Adjustability | ±1% factory-set output eliminates precision resistors; external resistor divider allows fine-tuning or higher-voltage derivation. |
| Spread-Spectrum Clocking | ±3% frequency dither reduces peak EMI amplitude-critical for CISPR 25 Class 5 automotive compliance. |
| Thermal & Overcurrent Protection | 165°C thermal shutdown with 15°C hysteresis; channel-specific current limit (7.8–10A) prevents damage during short circuits. |
| AEC-Q100 Qualification | Qualified to Grade 1 (−40°C to +125°C ambient)-validated for automotive infotainment, ADAS, and body control modules. |
Applications
| Automotive ADAS Camera Module | Industrial PLC CPU Core Supply |
|---|---|
|
Use Scenario: Dual-rail power for image sensor (1.2V) and ISP processor (1.8V) in compact rear-view camera housing. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering tightly regulated, low-noise DC rails with independent enable/control per rail. Use Value: Factory-preset ±1% accuracy ensures consistent sensor gain calibration; 2.1MHz switching avoids interference with video clock harmonics. |
Use Scenario: High-reliability 3.3V and 1.2V supplies for ARM Cortex-M7 microcontroller and FPGA fabric in DIN-rail mounted controller. IC Role / Device Role / Timing Role: Dual-output buck converter providing sequenced startup and independent reset signaling to host MCU. Use Value: AEC-Q100 qualification guarantees operation at 125°C ambient; separate RESET outputs enable per-rail fault detection in safety-critical firmware. |
| Automotive Infotainment SoC | Medical Imaging Sensor Interface |
|
Use Scenario: Core (0.85V) and I/O (1.8V) rails for quad-core application processor in head-unit system-on-chip. IC Role / Device Role / Timing Role: Secondary regulator stepping down 5V intermediate bus to precise low-voltage domains with fast transient response. Use Value: MAXQ architecture delivers <100ns load-step recovery; spread-spectrum mode meets stringent EMC limits in crowded RF environments. |
Use Scenario: Low-noise, thermally stable power for CMOS image sensor array and ADC front-end in portable ultrasound probe. IC Role / Device Role / Timing Role: Dual-channel buck supplying isolated analog (2.5V) and digital (1.2V) domains with independent soft-start timing. Use Value: −40°C to +125°C operation ensures reliability during sterilization cycles; 90% efficiency at 1V minimizes self-heating near sensitive analog circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4482GQ-AEC1-Z | 4A per channel, 2.2MHz fixed frequency, no spread spectrum, 16-pin QFN | Lacks independent RESET outputs and factory-programmable soft-start; lower current rating limits SoC scalability. | Choose for cost-sensitive non-AEC-Q100 designs where 4A/channel suffices and RESET independence is not required. |
| TPS6521905RGER | 6A dual output, 2.2MHz, integrated LDOs, 32-pin VQFN | Includes auxiliary LDOs and PMIC-level sequencing logic but larger footprint and no AEC-Q100 qualification. | Prefer when system requires integrated LDOs and complex power sequencing-accept trade-off of larger size and no automotive qualification. |
Compared with MPQ4482GQ-AEC1-Z and TPS6521905RGER, MAX20429CAFNA/VY+ uniquely combines AEC-Q100 Grade 1 qualification, independent dual-channel RESET signaling, factory-programmable soft-start/timeout, and 3mm × 3.5mm FCQFN packaging-making it optimal for space-constrained, safety-aware automotive and industrial applications requiring precise rail control.
Availability
MAX20429CAFNA/VY+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, industrial PLC CPU core supplies, and medical imaging sensor interfaces requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for MAX20429CAFNA/VY+ 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 automotive, industrial, communications, and healthcare markets with precision, reliability, and innovation.
The MAX20429CAFNA/VY+ belongs to Analog Devices' MAXQ™-enabled power management portfolio, designed specifically for high-dynamic-range, thermally demanding applications in automotive and industrial embedded systems where precision regulation and robust fault handling are critical.
FAQ
What is the output voltage accuracy specification for MAX20429CAFNA/VY+?
The MAX20429CAFNA/VY+ guarantees ±1% output voltage accuracy over line, load, and temperature (−40°C to +125°C ambient) for factory-preset configurations. This specification applies to PWM-mode operation with 0A ≤ ILOAD ≤ 6A and input voltage between MAX(3.0V, VOUT + 0.5V) and 5.5V. The accuracy eliminates the need for 0.1% external feedback resistors in production designs.
Does MAX20429CAFNA/VY+ support external synchronization?
Yes, MAX20429CAFNA/VY+ supports external clock synchronization via its SYNC pin. When driven with a logic-high signal or external clock in the range of 1.9–2.3MHz (for 2.1MHz internal mode) or 2.8–3.6MHz (for 3.2MHz internal mode), the device locks to the external frequency and operates in forced-PWM mode. An unconnected or logic-low SYNC pin enables skip-mode operation under light loads.
What thermal protection features does MAX20429CAFNA/VY+ include?
MAX20429CAFNA/VY+ incorporates overtemperature shutdown that activates at a junction temperature of 165°C (typical), disabling both outputs until the die cools by 15°C hysteresis. This protection is independent of ambient temperature and is guaranteed over the full −40°C to +125°C operating range. The device's FCQFN package with exposed thermal pad and multiple PGND pins enables efficient heat dissipation in high-power-density layouts.
How is soft-start configured on MAX20429CAFNA/VY+?
Soft-start on MAX20429CAFNA/VY+ is factory-programmed with four selectable ramp rates: 4, 8, 16, or 32 clocks per step. Step size is 12.5mV for VOUT ≤ 1.6V and 50mV for VOUT > 1.6V. The ramp begins on the rising edge of EN1 or EN2 and controls inrush current during power-up. Soft-shutdown behavior is also factory-configurable-either immediate Hi-Z or controlled ramp-down at 32 clocks/step.
Is MAX20429CAFNA/VY+ qualified for automotive applications?
Yes, MAX20429CAFNA/VY+ is AEC-Q100 qualified to Grade 1 (−40°C to +125°C ambient), making it suitable for automotive applications including ADAS cameras, infotainment systems, and body control modules. Its qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD-ensuring reliability in harsh vehicular environments.
MAX20429CAFNA/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 18-PowerWFQFN
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V, 1.6V
- Voltage - Output (Max):
- 1.59V, 3.8V
- Current - Output:
- 6A, 6A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 18-FC2QFN (2.5x2.5)
MAX20429CAFNA/VY+ FAQ
1.How can I place an order for MAX20429CAFNA/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20429CAFNA/VY+ 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 MAX20429CAFNA/VY+ reliable?
The price and inventory of MAX20429CAFNA/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20429CAFNA/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20429CAFNA/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20429CAFNA/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20429CAFNA/VY+?
MAX20429CAFNA/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20429CAFNA/VY+ 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 MAX20429CAFNA/VY+?
For technical support, including MAX20429CAFNA/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20429CAFNA/VY+ requirements.
6.How does Aetrix verify that MAX20429CAFNA/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20429CAFNA/VY+ 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 MAX20429CAFNA/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20429CAFNA/VY+?
All MAX20429CAFNA/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20429CAFNA/VY+, 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 MAX20429CAFNA/VY+ part is unused and in its original packaging.
Return procedure for MAX20429CAFNA/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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