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Analog Devices Inc./Maxim Integrated MAX20020ATBA/V+
- Part No.:
- MAX20020ATBA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX20020ATBA/V+.pdf
- Description:
- IC REG BUCK 3.3V/1.8V DL 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,211
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Product details
Overview
MAX20020ATBA/V+ from Maxim Integrated is an AEC-Q100-qualified dual synchronous step-down DC-DC converter with integrated high-side and low-side MOSFETs, designed for automotive surround-view camera power supplies. It delivers 500mA per channel at factory-preset outputs of 3.3V (Buck 1) and 1.8V (Buck 2), operates up to 17V input, features 3.2MHz fixed-frequency PWM operation, and supports 180° out-of-phase switching to minimize input ripple.
For engineers reviewing the MAX20020ATBA/V+ datasheet, MAX20020ATBA/V+ pinout, MAX20020ATBA/V+ application, or MAX20020ATBA/V+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal and protection behavior, and real-world selection guidance for point-of-load designs in camera modules and ADAS subsystems.
Technical Context
The MAX20020ATBA/V+ implements peak current-mode control with load-line compensation for stable transient response across -40°C to +125°C. Buck 1 starts only after VSUP exceeds 5.5V (rising threshold), while Buck 2 is enabled via the EN pin-ensuring controlled sequencing between rails.
It integrates a 5V BIAS linear regulator (4.75V output, 2.7V UVLO), supports spread-spectrum frequency modulation for EMI reduction, and uses pMOS/nMOS topology for Buck 2 to enable true 100% duty-cycle dropout operation-critical for low-input-voltage camera power-over-coax scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5V to 17V (Buck 1 startup requires VSUP > 5.5V rising; supports PoC systems) |
| Output Voltages | Factory preset: 3.3V @ 500mA (Buck 1), 1.8V @ 500mA (Buck 2); ±3% accuracy over temp/load |
| Switching Frequency | 3.2MHz (factory-set); enables ≤2.2µH inductors and all-ceramic 22µF output caps |
| Thermal Protection | Thermal shutdown at 175°C with 15°C hysteresis and automatic recovery |
| Protection Features | Cycle-by-cycle current limit, Buck 2 overvoltage detection (107% rising threshold), 500Ω active pulldown on OUT2 fault |
| Package | 10-pin TDFN (3mm × 2mm × 0.75mm) with exposed pad; θJA = 63.8°C/W (4-layer board) |
| AEC-Q100 Grade | Qualified to Grade 0 (-40°C to +125°C junction); automotive-reliability tested |
Pinout & Package
MAX20020ATBA/V+ is housed in a 10-pin 3mm × 2mm TDFN package with exposed thermal pad (EP), RoHS-compliant and lead(Pb)-free. The EP must be soldered to a solid ground plane using multiple vias for thermal dissipation (θJC = 11.7°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SUP | High-voltage input supply and internal high-side switch rail | Powers Buck 1 switches and internal LDO; requires 10µF X5R ceramic bypass to PGND |
| LX1 | Buck 1 inductor switching node | Connects to external inductor; contains internal clamp diodes to PGND/AGND/SUP |
| PGND | Power ground return | Must be tied to AGND and EP; forms low-impedance return path for high-current switching loops |
| LX2 | Buck 2 inductor switching node | Connects to Buck 2 inductor; clamp diodes to PV2 and PGND limit voltage stress during transients |
| PV2 | Buck 2 input and Buck 1 output feedback sense | Short, wide trace from Buck 1 output (OUT1) to PV2 ensures accurate regulation of Buck 2 |
| OUT2 | Buck 2 regulated output voltage sense | Internal 180kΩ pulldown and 500Ω discharge resistor activated on EN=low, OV, or thermal fault |
| BIAS | 5V linear regulator output | Powers internal circuitry; requires 2.2µF ceramic cap to AGND; UVLO at 2.7V with 400–650mV hysteresis |
| AGND | Analog ground reference | Must connect to PGND at single point near input capacitor; isolates noise-sensitive analog blocks |
| EN | Enable control for Buck 2 only | High-voltage tolerant; activates Buck 2 only after Buck 1 reaches regulation; 2.4V rising / 0.6V falling thresholds |
| BST | Bootstrap supply for Buck 1 high-side driver | Requires 0.1µF ceramic capacitor between BST and LX1; critical for proper gate drive of high-side MOSFET |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase operation | Reduces input-current ripple by ~70% vs. in-phase dual buck, lowering bulk capacitor RMS current and size |
| Spread-spectrum modulation | ±3% frequency dithering reduces peak EMI amplitude without affecting loop stability or output ripple |
| Factory-programmed outputs | No external resistors needed-3.3V/1.8V configuration eliminates BOM cost and layout error risk |
| Integrated BIAS LDO | 5V/15mA regulator powers internal logic and gate drivers; eliminates need for external bias supply |
| Automotive-ready sequencing | Buck 1 auto-starts at VSUP > 5.5V; Buck 2 enables only after VOUT1 stabilizes-prevents brownout on downstream SoCs |
Applications
| Surround-View Camera Module | ADAS Front-Camera Power Supply |
|---|---|
|
Use Scenario: Dual-rail power for image sensor (1.8V) and ISP/FPGA core (3.3V) in rear/side-view cameras. IC Role / Device Role / Timing Role: Primary dual-output PMIC delivering sequenced, low-noise, automotive-grade DC power. Use Value: 3.2MHz operation enables compact 2.2µH inductor + 22µF ceramic solution; 180° phasing cuts input cap size by 40%. |
Use Scenario: Powering 3.3V image signal processor and 1.8V MIPI CSI-2 serializer in forward-facing ADAS cameras. IC Role / Device Role / Timing Role: Synchronized dual-buck regulator with fault-aware sequencing and overvoltage protection on sensor rail. Use Value: Buck 2 OV protection (107% threshold) prevents damage to sensitive 1.8V image sensors during transient overvoltage events. |
| Automotive Power-Over-Coax (PoC) | In-Vehicle Infotainment (IVI) Camera Hub |
|
Use Scenario: Regulating 12V coaxial power down to 3.3V/1.8V at camera end for bidirectional video + power transmission. IC Role / Device Role / Timing Role: High-input-voltage dual buck with dropout-tolerant 100% duty cycle on Buck 2 for low-VIN PoC operation. Use Value: Buck 2's pMOS high-side allows full 100% duty cycle-maintains 1.8V output even as coax voltage drops to 3.5V. |
Use Scenario: Centralized power for multi-camera IVI system (front, rear, cabin) requiring identical 3.3V/1.8V rails. IC Role / Device Role / Timing Role: AEC-Q100 qualified dual converter enabling scalable, footprint-consistent power design across camera nodes. Use Value: Identical 3mm × 2mm TDFN footprint across MAX20020 variants simplifies PCB reuse and BOM consolidation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20019ATBA/V+ | EN controls both Buck 1 and Buck 2; no VSUP startup dependency; 500mV EN hysteresis for long-cable compatibility | Preferred for systems where single-enable simplicity and coax cable flexibility outweigh strict sequencing requirements | Select MAX20019ATBA/V+ when unified enable and robust slow-start over long cables are required, not strict Buck 1-first sequencing |
| TPS650362ARSLR | 3.0V/1.8V fixed outputs; 2.2MHz switching; no spread spectrum; smaller 2.5mm × 2.5mm QFN package | Targeted at space-constrained infotainment displays-not AEC-Q100 qualified or rated for -40°C to +125°C | Choose TPS650362ARSLR only for non-automotive, commercial-temp applications where footprint is primary constraint |
Compared with MAX20019ATBA/V+, the MAX20020ATBA/V+ adds precise Buck 1 startup control (VSUP > 5.5V) and independent EN for Buck 2-enabling safer sequencing in camera SoC power trees. Versus TPS650362ARSLR, it delivers automotive qualification, higher input voltage support, and spread-spectrum EMI reduction at the cost of slightly larger footprint.
Availability
MAX20020ATBA/V+ is available at Aetrix Electronics and suitable for automotive surround-view camera modules, ADAS front-camera power supplies, and power-over-coax (PoC) endpoints requiring stable component supply, AEC-Q100 compliance, and high-frequency dual-buck integration.
Supply support for MAX20020ATBA/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) designs precision analog, mixed-signal, and power-management ICs for automotive, industrial, and communications markets.
The MAX20020 belongs to Maxim's automotive-grade power-management portfolio, engineered specifically for high-reliability, low-EMI camera and ADAS power delivery with integrated protection and sequencing control.
FAQ
What is the exact output voltage configuration of MAX20020ATBA/V+?
The MAX20020ATBA/V+ is factory-programmed for 3.3V on Buck 1 (OUT1) and 1.8V on Buck 2 (OUT2), with ±3% voltage accuracy across -40°C to +125°C and full 500mA load range. These values are fixed and cannot be adjusted externally via feedback resistors.
Does MAX20020ATBA/V+ support spread-spectrum frequency modulation?
Yes, MAX20020ATBA/V+ includes optional spread-spectrum modulation with ±3% frequency dithering to reduce peak EMI emissions. This feature is enabled by default in the ATBA/V+ variant and does not require external components or configuration pins.
How does the enable sequencing work between Buck 1 and Buck 2 in MAX20020ATBA/V+?
In MAX20020ATBA/V+, Buck 1 starts automatically when VSUP rises above 5.5V. Buck 2 remains disabled until Buck 1 output reaches regulation-then the EN pin must be driven high to activate Buck 2. This ensures safe, fault-aware power-up of downstream 1.8V logic before enabling the second rail.
What is the maximum continuous input voltage the MAX20020ATBA/V+ can handle?
The MAX20020ATBA/V+ supports a continuous input voltage range of 5.5V to 17V. Absolute maximum rating is +18V on SUP, but sustained operation above 17V may cause permanent damage. The 17V upper limit ensures reliable operation under automotive load-dump conditions.
Is the exposed pad (EP) on MAX20020ATBA/V+ electrically connected or thermal-only?
The exposed pad (EP) on MAX20020ATBA/V+ is a thermal-only connection-no electrical signal is routed to it. It must be soldered to a solid PGND plane using multiple thermal vias to achieve the specified θJC = 11.7°C/W and prevent thermal shutdown under 500mA load.
MAX20020ATBA/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 3.3V, 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA, 500mA
- Frequency - Switching:
- 3.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN-EP (2x3)
MAX20020ATBA/V+ FAQ
1.How can I place an order for MAX20020ATBA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20020ATBA/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 MAX20020ATBA/V+ reliable?
The price and inventory of MAX20020ATBA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20020ATBA/V+ is usually 5 days.
3.What payment methods are accepted for MAX20020ATBA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20020ATBA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20020ATBA/V+?
MAX20020ATBA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20020ATBA/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 MAX20020ATBA/V+?
For technical support, including MAX20020ATBA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20020ATBA/V+ requirements.
6.How does Aetrix verify that MAX20020ATBA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20020ATBA/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 MAX20020ATBA/V+ meets industry standards.
7.What is the process for return or replacement of MAX20020ATBA/V+?
All MAX20020ATBA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20020ATBA/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 MAX20020ATBA/V+ part is unused and in its original packaging.
Return procedure for MAX20020ATBA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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