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Analog Devices Inc./Maxim Integrated MAX20412ATJA/V+
- Part No.:
- MAX20412ATJA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX20412ATJA/V+.pdf
- Description:
- IC REG BUCK DL CH FOR SOC CORES
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Product details
Overview
The MAX20412ATJA/V+ from Maxim Integrated is a dual-output, AEC-Q100 qualified synchronous step-down controller IC for automotive point-of-load regulation, operating from 3.0V to 5.5V input and delivering 0.25V–1.275V outputs with ±2% accuracy over load, line, and temperature. It supports up to 30A per channel (60A on OUT1 in dual-phase mode), features 2.2MHz/1.1MHz fixed-frequency PWM and skip-mode operation, and integrates I²C-based dynamic voltage scaling for processor core rails.
For engineers reviewing the MAX20412ATJA/V+ datasheet, MAX20412ATJA/V+ pinout, MAX20412ATJA/V+ application, or MAX20412ATJA/V+ equivalent, key selection considerations include its dual-channel automotive PoL capability, programmable spread-spectrum EMI reduction, differential remote sensing, and factory-preset + I²C-adjustable output voltages in 6.25mV steps.
Technical Context
The MAX20412ATJA/V+ implements a current-mode control architecture with independent PWM modulators per channel, supporting forced-PWM, skip-mode, and frequency synchronization via SYNC I/O. Its dual-phase capability on Channel 1 uses PWM1X to drive an external second-phase controller (e.g., MAX15492B), enabling 60A output with interleaved timing and reduced input/output ripple.
It integrates two high-precision error amplifiers with programmable compensation, differential remote sense inputs (RS1±/RS2±) for accurate load-point regulation, and dedicated current-sense amplifiers with selectable DCR gain (16× or 32×) for accurate peak-current limiting at 35–87mV thresholds depending on channel and configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - compatible with automotive 5V rail and post-regulated supplies; UVLO threshold at 2.9V (rising) |
| Output Voltage Range | 0.25V to 1.275V in 6.25mV steps - supports modern low-voltage SoCs and processors with fine-grained DVS |
| Max Output Current | 30A per channel; 60A on OUT1 with dual-phase - enables high-current core rails without external current-sharing circuitry |
| Output Accuracy | ±2% over load/line/temp - ensures stable core voltage under dynamic CPU/GPU load transitions |
| Switching Frequency | 2.2MHz (CONFIG.FSW=0) or 1.1MHz (CONFIG.FSW=1) - allows all-ceramic output filtering and compact layout |
| I²C Interface Speed | Up to 3.4MHz - supports fast dynamic voltage scaling during processor state transitions (e.g., C-states) |
| Operating Temperature | −40°C to +125°C ambient - qualified per AEC-Q100 Grade 0 for under-hood and ADAS applications |
Pinout & Package
MAX20412ATJA/V+ is housed in a 32-pin, 5mm × 5mm TQFN package with exposed pad (EP = GND), optimized for thermal performance in automotive environments. The package supports ≤36°C/W junction-to-ambient thermal resistance on multilayer PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Analog ground reference | Separate from PGND1/PGND2; must be connected to low-noise analog ground plane to maintain ±2% regulation accuracy |
| EN1 / EN2 (Pins 21 / 5) | Active-high enable inputs | Independent digital control of each channel; tie low to disable unused channel and reduce quiescent current to 5µA |
| RS1± / RS2± (Pins 22–23 / 6–7) | Differential remote sense inputs | Compensates for IR drop across PCB traces; enables <±5mV load regulation error at point-of-load |
| CS1± / CS2± (Pins 24–25 / 8–9) | Current-sense differential inputs | Supports DCR sensing with 16× or 32× gain; sets peak-current limit at 35–87mV depending on channel and gain setting |
| PWM1X (Pin 18) | Second-phase PWM output | Drives external phase controller (e.g., MAX15492B); enables 60A on OUT1 with 180° phase shift for reduced input ripple |
| SYNC (Pin 17) | Frequency sync I/O | Configurable as input (for master clock injection) or output (for daisy-chaining multiple controllers); supports 0.9–2.6MHz range |
| PG1 / PG2 (Pins 26 / 10) | Open-drain power-good outputs | Assert low for 120µs after regulation; require external pull-up; indicate valid output within ±10% window (UV/OV thresholds defined) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent buck controllers | Enables separate regulation of CPU core (OUT1) and GPU/I/O (OUT2) rails with independent enable, soft-start, and fault management |
| Programmable spread-spectrum modulation | Reduces peak radiated EMI by ±3% frequency dithering - critical for CISPR 25 Class 5 automotive EMC compliance |
| I²C-controlled DVS with slew rate programming | Adjusts output voltage in 6.25mV steps with user-defined ramp rate - prevents overshoot/undershoot during processor DVFS transitions |
| Robust protection suite | Includes overcurrent (peak-current limit), overtemperature (165°C shutdown with 15°C hysteresis), and short-circuit (continuous) protection |
| Factory-preset + dynamic voltage options | Ships with default output voltage; full I²C reprogrammability allows one BOM to support multiple SoC voltage requirements |
Applications
| ADAS Domain Controller Power | Automotive Infotainment SoC Core Rail |
|---|---|
|
Use Scenario: Powering NVIDIA Orin or Qualcomm SA8155P SoCs in L2+/L3 autonomous driving units requiring tight voltage tolerance and fast transient response. IC Role / Device Role / Timing Role: Dual-channel controller delivering 1.0V @ 40A (OUT1 dual-phase) and 0.85V @ 25A (OUT2) with differential remote sensing at SoC package balls. Use Value: ±2% accuracy and 40µs load-transient recovery ensure stable operation during AI accelerator burst loads without brownout. |
Use Scenario: Regulating core voltage for infotainment application processors in head-unit designs with strict EMI limits. IC Role / Device Role / Timing Role: Primary PoL controller using 2.2MHz switching and spread-spectrum to meet CISPR 25 radiated emissions limits in crowded RF environments. Use Value: All-ceramic output filter support and 180° phase shift between channels minimize input capacitor RMS current and reduce board area by >30%. |
| Automotive Camera Module Power | Central Gateway ECU Core Supply |
|
Use Scenario: Providing clean, low-noise 1.1V supply to high-speed image signal processors (ISPs) in surround-view camera modules. IC Role / Device Role / Timing Role: Single-channel (OUT2) operation with forced-PWM mode and differential sensing to suppress noise coupling into analog video paths. Use Value: Skip-mode disabled via CONFIG bit ensures constant 2.2MHz switching - eliminates subharmonic noise in image data pipelines. |
Use Scenario: Powering Arm Cortex-R52/R5 cores in zonal gateway ECUs requiring functional safety-aware power sequencing. IC Role / Device Role / Timing Role: Dual-rail controller with independent EN1/EN2 and PG1/PG2 signals enabling ASIL-B compliant power-up/down sequencing per ISO 26262. Use Value: Programmable soft-start and PGOOD timeout (256 cycles) allow precise coordination with MCU reset assertion and firmware boot sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel automotive buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ8633BGLE-Z | Single-chip dual-output buck converter (integrated MOSFETs); max 16A/channel; no I²C interface; fixed 2.2MHz only | Limited to lower-current applications; lacks DVS, remote sensing, and phase extension - suitable for non-processor PoL only | Select when board space is critical and current demand ≤16A/channel; avoid for SoC core rails requiring dynamic voltage scaling |
| LM61480QRJNRQ1 | Single-channel AEC-Q100 buck controller; 3.0–36V input; supports up to 20A; no I²C; uses resistor-programmed VOUT | Requires two devices for dual-rail; no digital control or synchronization; higher minimum input voltage limits use in 5V-only systems | Choose for cost-sensitive, single-rail applications where I²C and dual-phase are unnecessary; not a functional substitute for MAX20412ATJA/V+ |
Compared with MPQ8633BGLE-Z and LM61480QRJNRQ1, the MAX20412ATJA/V+ uniquely delivers 60A-capable dual-phase control, I²C-based DVS with slew control, and AEC-Q100-compliant dual-rail sequencing - making it the only option for high-performance automotive SoC power delivery requiring both precision and programmability.
Availability
MAX20412ATJA/V+ is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment SoC core rails, and central gateway ECUs requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant performance.
Supply support for MAX20412ATJA/V+ 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX20412 product line is designed specifically for automotive low-voltage, high-current point-of-load regulation - targeting next-generation ADAS, infotainment, and zonal ECU power architectures requiring precision, programmability, and robustness.
FAQ
What is the maximum supported output current for each channel of the MAX20412ATJA/V+?
The MAX20412ATJA/V+ supports up to 30A per channel under standard operation. Channel 1 (OUT1) can be configured in dual-phase mode using the PWM1X output to drive an external second-phase controller (e.g., MAX15492B), enabling up to 60A total output. This capability is confirmed in the device's typical operating characteristics and pin description, where PWM1X is explicitly designated for optional second-phase control of DCDC1.
Does the MAX20412ATJA/V+ support I²C-based dynamic voltage scaling (DVS)?
Yes, the MAX20412ATJA/V+ supports full I²C-based DVS with programmable slew rates for both channels. The I²C interface (SDA/SCL pins) allows real-time adjustment of output voltage from 0.25V to 1.275V in 6.25mV steps. Slew rate control prevents overshoot/undershoot during processor DVFS transitions, and the ADDR pin selects between two I²C addresses to independently configure OUT1 and OUT2.
What protection features are integrated into the MAX20412ATJA/V+?
The MAX20412ATJA/V+ integrates overcurrent protection (via peak-current limit thresholds of 35–87mV depending on channel and DCR gain), overtemperature shutdown at 165°C with 15°C hysteresis, short-circuit protection with continuous operation capability, and input UVLO (2.9V rising). These protections are documented in the Electrical Characteristics table and Absolute Maximum Ratings section of the official datasheet.
Is the MAX20412ATJA/V+ qualified for automotive applications?
Yes, the MAX20412ATJA/V+ is AEC-Q100 qualified (Grade 0) and specified for −40°C to +125°C operating ambient temperature. It includes automotive-specific features such as differential remote sensing, robust EMI mitigation (spread-spectrum, 2.2MHz operation), and independent enable/PGOOD signals for functional safety sequencing - all validated per automotive reliability standards.
Can the MAX20412ATJA/V+ operate with all-ceramic output capacitors?
Yes, the MAX20412ATJA/V+ supports all-ceramic output filtering due to its 2.2MHz fixed-frequency PWM mode, which provides sufficient bandwidth to maintain stability with low-ESR ceramic capacitors. The datasheet explicitly states that 2.2MHz operation "allows the use of all-ceramic capacitors and minimizes external components," and typical efficiency curves confirm stable operation with 4×10µF ceramic arrays per channel.
MAX20412ATJA/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Strip
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX20412ATJA/V+ FAQ
1.How can I place an order for MAX20412ATJA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20412ATJA/V+ 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 MAX20412ATJA/V+ reliable?
The price and inventory of MAX20412ATJA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20412ATJA/V+ is usually 5 days.
3.What payment methods are accepted for MAX20412ATJA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20412ATJA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20412ATJA/V+?
MAX20412ATJA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20412ATJA/V+ 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 MAX20412ATJA/V+?
For technical support, including MAX20412ATJA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20412ATJA/V+ requirements.
6.How does Aetrix verify that MAX20412ATJA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20412ATJA/V+ 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 MAX20412ATJA/V+ meets industry standards.
7.What is the process for return or replacement of MAX20412ATJA/V+?
All MAX20412ATJA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20412ATJA/V+, 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 MAX20412ATJA/V+ part is unused and in its original packaging.
Return procedure for MAX20412ATJA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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