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Analog Devices Inc./Maxim Integrated MAX20020ATBC/V+
- Part No.:
- MAX20020ATBC/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX20020ATBC/V+.pdf
- Description:
- IC REG BUCK 3.3V/1.2V DL 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,061
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Product details
Overview
MAX20020ATBC/V+ from Maxim Integrated is an AEC-Q100 qualified dual synchronous step-down DC-DC converter IC for automotive camera power supplies, integrating high-side and low-side MOSFETs per channel, with factory-preset 3.3V/1.2V outputs, 3.2MHz switching frequency, and operation across 5.5V–17V input range. It delivers up to 500mA per buck stage with 180° out-of-phase operation to minimize input ripple.
For engineers reviewing the MAX20020ATBC/V+ datasheet, MAX20020ATBC/V+ pinout, MAX20020ATBC/V+ application, or MAX20020ATBC/V+ equivalent, key selection considerations include its automotive-grade thermal range (−40°C to +125°C), integrated BIAS linear regulator (5V), EN-controlled Buck 2 startup sequencing, and TDFN-EP 10-pin package optimized for coax-powered surround-view systems.
Technical Context
The MAX20020ATBC/V+ implements peak current-mode PWM control with fixed 3.2MHz switching frequency and 180° phase shift between Buck 1 and Buck 2 to suppress input-current ripple. Its Buck 1 starts autonomously when VSUP exceeds 5.5V (rising), while Buck 2 is enabled only after EN assertion and VOUT1 regulation - ensuring strict power sequencing for camera sensor rails.
Buck 1 uses an n-channel high-side MOSFET (RON_HS1 ≤ 500mΩ) and operates up to 96% duty cycle in dropout; Buck 2 employs a p-channel high-side device (RON_HS2 ≤ 250mΩ) enabling true 100% duty-cycle operation. Both converters feature cycle-by-cycle current limiting, overvoltage protection on OUT2 (105–107% threshold), and thermal shutdown with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.5V to 17V - supports Power-over-Coax supply with headroom above 12V automotive battery transients |
| Output Voltages | 3.3V (Buck 1), 1.2V (Buck 2) - factory-preset, no external feedback resistors required |
| Switching Frequency | 3.2MHz - enables all-ceramic design with small inductors (e.g., 4.7µH for 500mA) and reduced EMI filtering area |
| Output Current | 500mA per channel - sufficient for image sensor core and I/O rails in surround-view modules |
| Thermal Rating | −40°C to +125°C ambient - AEC-Q100 Grade 0 qualified for under-hood and camera housing environments |
| Protection Features | Overvoltage (OUT2), cycle-by-cycle current limit, thermal shutdown with auto-recovery - eliminates need for external fault management circuitry |
| Package | 10-pin TDFN-EP (3mm × 2mm, 0.75mm height) - exposed pad ensures <64°C/W θJA on 4-layer board for compact thermal design |
Pinout & Package
MAX20020ATBC/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 effective heat dissipation and optimal power handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SUP | High-voltage input supply and internal LDO input | Powers Buck 1 switches and internal regulators; requires 10µF X5R ceramic capacitor to PGND |
| LX1 | Buck 1 inductor switching node | Connects to 3.3V output inductor; internal clamp diodes to PGND/AGND/SUP limit voltage stress during transients |
| PGND | Power ground reference | Must be tied to AGND at input capacitor; connects directly to exposed pad for thermal and electrical integrity |
| LX2 | Buck 2 inductor switching node | Connects to 1.2V output inductor; internal clamps to PV2 and PGND prevent reverse conduction damage |
| PV2 | Buck 1 output voltage feedback sense for Buck 2 | Short, low-impedance trace from OUT1 to PV2 sets Buck 2 input voltage and regulates cross-coupling stability |
| OUT2 | Buck 2 output voltage feedback node | Includes 500Ω pulldown resistor activated during EN=low, OV, or thermal shutdown for safe discharge |
| BIAS | Integrated 5V linear regulator output | Powers internal logic; bypassed with 2.2µF ceramic to AGND; UVLO hysteresis = 400–650mV |
| AGND | Analog ground reference | Joined to PGND at input capacitor; separates noise-sensitive analog paths from high-current power loops |
| EN | Enable input for Buck 2 only | Logic-high (>2.4V) enables Buck 2 after Buck 1 regulation; rising threshold = 2.4V, falling = 0.6V (VSUP > 5V) |
| BST | Bootstrap supply for Buck 1 high-side gate driver | Requires 0.1µF ceramic capacitor between BST and LX1; enables efficient n-MOSFET high-side drive |
Key Features
| Feature | Design Value |
|---|---|
| 180° interleaved operation | Reduces RMS input ripple by ~30% vs. in-phase dual bucks - cuts input capacitor size and EMI filter requirements |
| Factory-preset dual outputs | Eliminates external feedback dividers and associated layout sensitivity - improves production yield and long-term stability |
| Integrated BIAS LDO (5V) | Provides regulated internal supply independent of VSUP fluctuations - ensures consistent gate drive and control loop performance |
| Spread-spectrum modulation | ±3% frequency dithering lowers peak EMI amplitude - simplifies compliance testing for CISPR 25 Class 5 automotive emissions |
| Automotive-grade thermal design | θJA = 63.8°C/W on 4-layer board enables 500mA continuous operation at +105°C ambient without derating |
| Robust startup sequencing | Buck 1 initiates at VSUP > 5.5V; Buck 2 waits for EN + VOUT1 regulation - prevents brownout-induced sensor reset in camera modules |
Applications
| Surround-View Camera Module | ADAS Front Camera Power |
|---|---|
Use Scenario: Dual-rail power for CMOS image sensor (core 1.2V, I/O 3.3V) and ISP in rear/side-view cameras with coaxial power delivery. IC Role / Device Role / Timing Role: Primary dual-buck regulator delivering sequenced, low-noise, high-efficiency DC power with minimal external components. Use Value: Enables compact 20mm² PCB area via 3.2MHz switching and all-ceramic design; 500mV EN hysteresis tolerates long coax cables without false triggering. |
Use Scenario: Powering front-facing ADAS camera with strict startup timing, thermal resilience, and EMI constraints near radar units. IC Role / Device Role / Timing Role: Automotive-qualified dual-step-down converter providing isolated, sequenced 3.3V and 1.2V rails with built-in OV and thermal protection. Use Value: AEC-Q100 Grade 0 rating and −40°C to +125°C operation ensure reliability in engine bay mounting; spread spectrum reduces radiated emissions near 77GHz radar bands. |
| Automotive Infotainment Display Backlight | In-Cabin Driver Monitoring System |
Use Scenario: Supplying LED driver IC and display controller in center-stack displays where space and thermal density are constrained. IC Role / Device Role / Timing Role: Dual-output PMIC delivering stable 3.3V logic rail and 1.2V processor core rail with tight voltage accuracy (±3%). Use Value: 180° phasing minimizes input capacitor heating; 10-pin TDFN package allows placement beneath display module for vertical stacking. |
Use Scenario: Powering IR illumination LEDs and NIR image sensor in cabin-facing driver attention monitoring systems. IC Role / Device Role / Timing Role: Compact dual-buck solution supporting rapid startup and precise voltage tracking for low-power NIR sensors. Use Value: Factory-set 3.3V/1.2V outputs eliminate calibration drift; BIAS LDO powers auxiliary circuits without adding discrete regulators. |
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 |
|---|---|---|---|
| MAX20019ATBC/V+ | Same pinout and 3.3V/1.2V preset, but EN controls both bucks; no VSUP > 5.5V startup requirement | Suitable for simpler systems where simultaneous enable is acceptable and coax cable length is short | Select MAX20019ATBC/V+ if full-system enable sequencing is not required and lower system-level hysteresis margin is acceptable |
| TPS650362AQPWPRQ1 | Triple-output (3.3V/1.2V/1.0V), 2.2MHz, higher quiescent current (12µA vs. 3.5mA), no spread spectrum | Supports additional low-current rail for interface logic; less suitable for EMI-sensitive camera placements | Choose TPS650362AQPWPRQ1 when third regulated rail is needed and EMI headroom permits omission of spread spectrum |
Compared with MAX20019ATBC/V+, the MAX20020ATBC/V+ provides stricter Buck 2 enable control tied to Buck 1 regulation - critical for camera sensor initialization integrity. Against TPS650362AQPWPRQ1, it offers superior EMI performance and smaller solution size at the cost of one fewer output rail.
Availability
MAX20020ATBC/V+ is available at Aetrix Electronics and suitable for automotive camera modules, ADAS front/rear vision systems, and in-cabin driver monitoring applications requiring stable component supply, AEC-Q100 qualification, and compact dual-rail power conversion.
Supply support for MAX20020ATBC/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 - emphasizing high reliability, small form factor, and system-level integration.
The MAX20020ATBC/V+ belongs to Maxim's automotive DC-DC converter product line, engineered specifically for camera and sensor point-of-load applications demanding ultra-small footprint, robust transient response, and seamless integration into coax-powered vision systems.
FAQ
What is the exact output voltage configuration of the MAX20020ATBC/V+?
The MAX20020ATBC/V+ has factory-preset outputs: Buck 1 delivers 3.3V and Buck 2 delivers 1.2V. These values are laser-trimmed during manufacturing and require no external feedback resistors. The 3.3V/1.2V combination is confirmed in the Ordering Information table (page 17) and applies exclusively to the /V+ suffix variant with TDFN-EP packaging.
How does the MAX20020ATBC/V+ handle power sequencing between Buck 1 and Buck 2?
The MAX20020ATBC/V+ enforces strict sequencing: Buck 1 starts automatically when VSUP rises above 5.5V, while Buck 2 remains disabled until both EN is asserted high *and* VOUT1 reaches regulation. This prevents premature activation of downstream 1.2V loads before the 3.3V rail stabilizes - a critical safeguard for image sensor initialization in automotive camera modules.
Does the MAX20020ATBC/V+ support spread-spectrum frequency modulation?
Yes, the MAX20020ATBC/V+ includes optional spread-spectrum modulation with ±3% frequency dithering. This feature is enabled by default per the Ordering Information table (page 17), reducing peak radiated EMI amplitude and easing compliance with CISPR 25 Class 5 automotive emissions standards without requiring external EMI filters.
What is the thermal performance of the MAX20020ATBC/V+ on a standard PCB?
On a four-layer board, the MAX20020ATBC/V+ achieves θJA = 63.8°C/W and θJC = 11.7°C/W. With its exposed pad soldered to a solid ground plane, it sustains 500mA per channel continuously at +105°C ambient temperature without derating - verified in the Package Thermal Resistances section (page 2) and supported by the −40°C to +125°C operating range specification.
Can the MAX20020ATBC/V+ operate with input voltages below 5.5V?
No - the MAX20020ATBC/V+ Buck 1 will not initiate switching until VSUP exceeds 5.5V (rising threshold). Below this level, the device remains in shutdown. This behavior is explicitly defined in the Electrical Characteristics table (page 2) and distinguishes it from the MAX20019 series, which starts at 3.5V. Operation below 5.5V is outside specification and unsupported.
MAX20020ATBC/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 5.5V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 3.3V, 1.2V
- 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)
MAX20020ATBC/V+ FAQ
1.How can I place an order for MAX20020ATBC/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20020ATBC/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 MAX20020ATBC/V+ reliable?
The price and inventory of MAX20020ATBC/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20020ATBC/V+ is usually 5 days.
3.What payment methods are accepted for MAX20020ATBC/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20020ATBC/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20020ATBC/V+?
MAX20020ATBC/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20020ATBC/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 MAX20020ATBC/V+?
For technical support, including MAX20020ATBC/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20020ATBC/V+ requirements.
6.How does Aetrix verify that MAX20020ATBC/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20020ATBC/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 MAX20020ATBC/V+ meets industry standards.
7.What is the process for return or replacement of MAX20020ATBC/V+?
All MAX20020ATBC/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20020ATBC/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 MAX20020ATBC/V+ part is unused and in its original packaging.
Return procedure for MAX20020ATBC/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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