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Analog Devices Inc./Maxim Integrated MAX20019ATBA/V+T
- Part No.:
- MAX20019ATBA/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX20019ATBA/V+T.pdf
- Description:
- IC REG BUCK 3.3V/1.8V DL 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,436
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Product details
Overview
MAX20019ATBA/V+T 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, and switches at 3.2MHz with spread-spectrum EMI reduction.
For engineers reviewing the MAX20019ATBA/V+T datasheet, MAX20019ATBA/V+T pinout, MAX20019ATBA/V+T application, or MAX20019ATBA/V+T equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal and protection behavior, and real-world design implications for coax-powered camera modules.
Technical Context
The MAX20019ATBA/V+T implements peak current-mode PWM control with load-line voltage positioning for optimized transient response and reduced output capacitance requirements. Its Buck 1 uses an n-channel high-side MOSFET (RDS(ON) ≤ 500mΩ) and p-channel low-side MOSFET, while Buck 2 employs complementary pMOS/nMOS switches (RDS(ON) ≤ 250mΩ / 350mΩ) enabling true 100% duty-cycle operation in dropout.
It features independent soft-start timing (1.3ms per rail at 3.2MHz), 180° out-of-phase switching to minimize input ripple, and a dedicated 5V BIAS linear regulator (4.75V output, ±200mV UVLO hysteresis) powering internal circuitry. Protection includes cycle-by-cycle current limiting, OUT2 overvoltage detection (105–107% threshold), and thermal shutdown with 15°C hysteresis at 175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 17V - supports Power-over-Coax in automotive camera systems without external pre-regulation. |
| Switching Frequency | 3.2MHz fixed - enables use of sub-3µH inductors and all-ceramic 22µF output capacitors, reducing solution size. |
| Output Voltages | 3.3V @ 500mA (Buck 1), 1.8V @ 500mA (Buck 2) - factory-trimmed, ±3% accuracy across -40°C to +125°C. |
| Efficiency | Up to 92% at 500mA (VSUP = 8V, VOUT1 = 3.3V) - achieved via low RDS(ON) integrated FETs and optimized gate drive. |
| Thermal Performance | θJA = 63.8°C/W (4-layer board) - allows full 500mA load at +125°C ambient with proper PCB copper area and EP grounding. |
| Protection Features | Overvoltage (OUT2), thermal shutdown (175°C), cycle-by-cycle current limit (1.0A typ), and automatic recovery - eliminates need for external fault management circuitry. |
| Enable Hysteresis | 500mV (MAX20019 variant) - permits reliable startup over long, high-impedance coax cables in slow-rising supply conditions. |
Pinout & Package
MAX20019ATBA/V+T is housed in a 3mm × 2mm × 0.75mm 10-pin TDFN package with exposed pad (EP), RoHS-compliant and automotive qualified. The exposed pad must be soldered to a solid ground plane using multiple thermal vias for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SUP | High-voltage input supply and Buck 1 switch driver supply | Accepts 3.5–17V; powers internal LDO and Buck 1 gate drivers; requires 10µF X5R ceramic bypass to PGND. |
| LX1 | Buck 1 inductor switching node | Connects to high-side nMOS drain and low-side pMOS source; clamped internally to PGND/AGND/SUP; requires tight layout to minimize ringing. |
| PGND | Power ground return | Common return for LX1, LX2, and input/output capacitors; must be tied directly to EP and AGND at single point near input cap. |
| LX2 | Buck 2 inductor switching node | Connects to Buck 2 pMOS drain and nMOS source; clamped to PV2 and PGND; sensitive to layout-induced noise coupling. |
| PV2 | Buck 2 input voltage and Buck 1 output feedback sense | Carries Buck 1 output current to Buck 2 input; must be short/wide trace from OUT1 to PV2 to avoid regulation error. |
| OUT2 | Buck 2 output voltage feedback and discharge node | Internal 500Ω pulldown activates on EN=low, OV, or thermal shutdown; connects to external resistor divider for voltage setting (not applicable here-factory preset). |
| BIAS | 5V linear regulator output | Powers internal analog/digital blocks; requires 2.2µF X7R ceramic to AGND; UVLO hysteresis ensures clean startup. |
| AGND | Analog ground reference | Reference for BIAS, feedback, and control circuits; must be connected to PGND at single point near input capacitor. |
| EN | High-voltage enable input with 500mV hysteresis | Directly driven by SUP or remote controller; rising threshold 1.5V (typ); enables both Buck 1 and Buck 2 simultaneously. |
| BST | Buck 1 high-side gate driver bootstrap supply | Requires 0.1µF ceramic capacitor between BST and LX1; critical for proper nMOS high-side drive; no external connection beyond capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Small solution footprint | 2mm × 3mm TDFN package with all-ceramic passive support - fits within tight camera module PCB space constraints. |
| Coax cable compatibility | 500mV EN hysteresis - eliminates false triggering during slow-rising or noisy coax-supplied enable signals. |
| EMI mitigation | Integrated spread-spectrum frequency modulation - reduces peak radiated emissions without external components. |
| Automotive reliability | AEC-Q100 Grade 1 qualification (-40°C to +125°C) and 175°C thermal shutdown - meets ASIL-B system-level requirements. |
| No external soft-start components | Internal 1.3ms soft-start timer (3.2MHz) - prevents inrush current and eliminates need for external RC networks. |
Applications
| Surround-View Camera Module | ADAS Domain Controller PoL |
|---|---|
|
Use Scenario: Powering image sensor, ISP, and serializer in rear/side/front camera modules with Power-over-Coax architecture. IC Role / Device Role / Timing Role: Dual-output PMIC providing isolated, sequenced 3.3V (sensor I/O, serializer) and 1.8V (ISP core) rails from 12V coax feed. Use Value: Eliminates discrete regulators and external sequencing logic; 3.2MHz switching enables compact 2.2µH/22µF output filter meeting CISPR-25 Class 5 emission limits. |
Use Scenario: Local point-of-load regulation for vision processor cores and interface peripherals in centralized ADAS ECUs. IC Role / Device Role / Timing Role: Secondary buck supplying 1.8V core and 3.3V I/O from intermediate 5V rail generated by primary controller. Use Value: 180° phase shift cuts input ripple by >70%, reducing bulk capacitor size and EMI filter complexity on shared 5V bus. |
| Automotive Infotainment Display | Electronic Mirror System |
|
Use Scenario: Powering MIPI D-PHY transceivers and display timing controller in digital instrument clusters and center displays. IC Role / Device Role / Timing Role: Dedicated dual-buck delivering noise-sensitive 1.8V (PHY analog) and stable 3.3V (digital logic) from vehicle battery. Use Value: Load-line voltage positioning maintains margin against undershoot during burst-mode video data transmission, reducing required output capacitance by 30%. |
Use Scenario: Powering CMOS image sensors and video compression ASICs in interior/exterior electronic mirror assemblies. IC Role / Device Role / Timing Role: Compact dual-regulator supporting simultaneous 3.3V (sensor bias) and 1.8V (ASIC core) under wide-input transient conditions. Use Value: 17V absolute max input and robust OVP/thermal protection ensure uninterrupted operation during load-dump events (ISO 7637-2 Pulse 5a). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20020ATBA/V+ | EN controls only Buck 2; Buck 1 starts automatically when VSUP > 5.5V; identical pinout and output specs. | Used where Buck 1 must power up unconditionally (e.g., always-on sensor bias), while Buck 2 is software-gated. | Select MAX20020ATBA/V+ when independent control of Buck 2 is required and Buck 1 must be self-enabling above 5.5V. |
| TPS650362ARSLR | 2.2MHz fixed frequency; 3.3V/1.8V outputs; lower 3A total current capability; no spread spectrum; QFN-16 package. | Targets infotainment SoCs with higher current needs but less stringent EMI requirements than camera modules. | Choose TPS650362ARSLR if system requires higher current headroom and can accommodate larger 4mm × 4mm package and relaxed EMI compliance. |
Compared with MAX20020ATBA/V+, the MAX20019ATBA/V+T offers unified enable control ideal for synchronized camera rail startup; versus TPS650362ARSLR, it delivers superior EMI performance and smaller footprint at the cost of lower total current capacity.
Availability
MAX20019ATBA/V+T is available at Aetrix Electronics and suitable for automotive surround-view cameras, ADAS domain controllers, and electronic mirror systems requiring stable component supply, AEC-Q100 compliance, and production-ready packaging.
Supply support for MAX20019ATBA/V+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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX20019/MAX20020 product line targets high-reliability automotive camera power with integrated FETs, spread-spectrum EMI control, and coax-compatible enable architecture - specifically engineered for ASIL-B compliant vision systems.
FAQ
What output voltages does the MAX20019ATBA/V+T provide?
The MAX20019ATBA/V+T is factory-configured to deliver 3.3V at up to 500mA on Buck 1 and 1.8V at up to 500mA on Buck 2. These values are laser-trimmed during production and cannot be adjusted externally. Voltage accuracy is guaranteed at ±3% over -40°C to +125°C, making MAX20019ATBA/V+T suitable for precision imaging sensor and ISP power domains.
Does the MAX20019ATBA/V+T support Power-over-Coax applications?
Yes, the MAX20019ATBA/V+T is explicitly designed for Power-over-Coax in automotive camera systems. Its 3.5V to 17V input range accommodates coax-fed 12V supplies with significant drop and ripple, and its 500mV EN hysteresis ensures reliable startup even with long, lossy coax cables. The MAX20019ATBA/V+T also includes internal clamp diodes on LX1/LX2 to handle reverse recovery stress common in coax environments.
How does the MAX20019ATBA/V+T manage EMI in compact camera modules?
The MAX20019ATBA/V+T integrates spread-spectrum frequency modulation (±3% around 3.2MHz) and features a pinout optimized for tight PCB layout of switching nodes. Combined with 3.2MHz operation enabling small inductors/capacitors and 180° out-of-phase buck stages minimizing input ripple, these features allow MAX20019ATBA/V+T to meet CISPR-25 Class 5 radiated emissions limits without external EMI filters in typical camera PCB layouts.
What thermal design considerations apply to the MAX20019ATBA/V+T?
The MAX20019ATBA/V+T requires the exposed pad (EP) to be soldered to a minimum 100mm² copper area with ≥4 thermal vias (0.3mm diameter) connecting to inner ground planes. With this layout on a 4-layer board, θJA is 63.8°C/W, allowing full 500mA load at +125°C ambient. Derating begins above +70°C at 15.7mW/°C; continuous dissipation is limited to 1253.9mW at +70°C.
Is the MAX20019ATBA/V+T pin-compatible with other variants in the MAX20019 family?
Yes, all MAX20019 variants-including MAX20019ATBA/V+T, MAX20019ATBB/V+, and MAX20019ATBC/V+-share identical 10-pin TDFN-EP packaging and pinout. Differences are limited to factory-set output voltages (e.g., 2.8V/1.8V or 3.3V/1.2V) and spread-spectrum enable/disable state; no PCB redesign is needed when substituting within the MAX20019 family.
MAX20019ATBA/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
MAX20019ATBA/V+T FAQ
1.How can I place an order for MAX20019ATBA/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20019ATBA/V+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 MAX20019ATBA/V+T reliable?
The price and inventory of MAX20019ATBA/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20019ATBA/V+T is usually 5 days.
3.What payment methods are accepted for MAX20019ATBA/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20019ATBA/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20019ATBA/V+T?
MAX20019ATBA/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20019ATBA/V+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 MAX20019ATBA/V+T?
For technical support, including MAX20019ATBA/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20019ATBA/V+T requirements.
6.How does Aetrix verify that MAX20019ATBA/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20019ATBA/V+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 MAX20019ATBA/V+T meets industry standards.
7.What is the process for return or replacement of MAX20019ATBA/V+T?
All MAX20019ATBA/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20019ATBA/V+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 MAX20019ATBA/V+T part is unused and in its original packaging.
Return procedure for MAX20019ATBA/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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