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Analog Devices Inc./Maxim Integrated MAX20019ATBB/V+
- Part No.:
- MAX20019ATBB/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX20019ATBB/V+.pdf
- Description:
- IC REG BUCK 2.8V/1.8V DL 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,331
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Product details
Overview
MAX20019ATBB/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, features factory-preset 2.8V (Buck 1) and 1.8V (Buck 2) outputs, operates at 3.2MHz switching frequency, and supports 3.5V–17V input voltage range with 180° out-of-phase operation to minimize input ripple.
For engineers reviewing the MAX20019ATBB/V+ datasheet, MAX20019ATBB/V+ pinout, MAX20019ATBB/V+ application, or MAX20019ATBB/V+ equivalent, this page provides verified technical context, confirmed pin functions, automotive-grade thermal and protection specs, and validated alternatives for point-of-load designs in camera modules requiring compact, EMI-optimized, coax-powered solutions.
Technical Context
The MAX20019ATBB/V+ implements peak current-mode PWM control with load-line architecture for precise cycle-by-cycle inductor current regulation and optimized transient response. Its Buck 1 uses an n-channel high-side MOSFET (RDS(ON) ≤ 500mΩ) and Buck 2 uses a p-channel high-side MOSFET enabling 100% duty-cycle dropout operation.
It integrates a 5V BIAS linear regulator (4.75V output, 15mA capability), 500mV EN hysteresis for robust cable drive, spread-spectrum modulation for EMI reduction, and coordinated soft-start timing (1.3ms per rail at 3.2MHz) with VOUT1-to-VOUT2 sequencing dependency.
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 - enables all-ceramic design with small inductors (e.g., 3.3µH) and reduced output capacitance. |
| Output Voltages | 2.8V (Buck 1), 1.8V (Buck 2) - factory preset, no external feedback resistors required. |
| Output Current | 500mA per channel - sufficient for image sensor, ISP, and serializer ICs in 1080p/4K camera modules. |
| Thermal Rating | -40°C to +125°C ambient, 175°C junction shutdown with 15°C hysteresis - meets AEC-Q100 Grade 0 requirements. |
| Protection Features | Cycle-by-cycle current limit, OUT2 overvoltage detection (107% threshold), thermal shutdown with auto-recovery - ensures fault resilience in unattended vehicle systems. |
| Package | 10-pin TDFN (3mm × 2mm × 0.75mm) with exposed pad - optimized for thermal dissipation on 4-layer PCBs (θJA = 63.8°C/W). |
Pinout & Package
MAX20019ATBB/V+ is housed in a 10-pin 3mm × 2mm TDFN package with exposed thermal pad (EP), RoHS-compliant and AEC-Q100 qualified. The exposed pad must be soldered to a solid ground plane using multiple vias for effective thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SUP | Voltage supply input and internal high-side switch supply | Powers Buck 1 switches and internal LDO; requires 10µF X5R ceramic capacitor to PGND. |
| 2 LX1 | Inductor switching node for Buck 1 | Connects to 3.3µH inductor; internal clamp diodes to PGND/AGND/SUP limit voltage stress during transients. |
| 3 PGND | Power ground | Common return for high-current paths; must be tied to AGND and EP at single point near input capacitor. |
| 4 LX2 | Inductor switching node for Buck 2 | Connects to 2.2µH inductor; internal clamp diodes to PV2 and PGND prevent reverse conduction. |
| 5 PV2 | Buck 2 input and Buck 1 output voltage sense | Short, wide trace from Buck 1 output (2.8V) to PV2 sets Buck 2 input rail; critical for regulation accuracy. |
| 6 OUT2 | Feedback sense for Buck 2 output | Internal 180kΩ pulldown enabled during shutdown/overvoltage; discharges load rapidly via 500Ω resistor. |
| 7 BIAS | Linear regulator output (5V) | Powers internal circuitry; bypassed with 2.2µF ceramic capacitor to AGND for stable bias rail. |
| 8 AGND | Analog ground | Reference for feedback and control circuits; connected to PGND at single point to avoid noise coupling. |
| 9 EN | High-voltage enable with 500mV hysteresis | Enables both converters; 500mV hysteresis allows reliable activation over long coax cables with slow rise times. |
| 10 BST | High-side gate driver bootstrap supply | Requires 0.1µF ceramic capacitor between BST and LX1 for proper high-side FET gate drive. |
| EP | Exposed thermal pad | Not electrically active; must be soldered to PCB ground plane for thermal transfer (θJC = 11.7°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Small solution size | 2mm × 3mm footprint with 2.2MHz/3.2MHz operation eliminates need for electrolytic capacitors and reduces total board area by >40% vs. 500kHz converters. |
| Cable-flexible enable | 500mV EN hysteresis tolerates ≥10cm coax traces with RC delays up to 100µs, eliminating need for local level-shifting or buffering. |
| EMI-optimized layout | Pinout isolates high-di/dt nodes (LX1/LX2) from analog pins (AGND/OUT2); spread-spectrum modulation reduces peak radiated emissions by 10dB. |
| Self-protected operation | Integrated OV protection on OUT2, cycle-by-cycle current limiting, and thermal shutdown with automatic recovery eliminate need for external fault-handling circuitry. |
| Automotive-ready qualification | AEC-Q100 Grade 0, -40°C to +125°C operation, and 17V absolute max input ensure reliability in engine bay and ADAS camera environments. |
Applications
| Surround-View Camera Module | ADAS Front-Facing Camera |
|---|---|
|
Use Scenario: Powering CMOS image sensor, ISP, and serializer in a 360° vehicle camera system with coaxial power delivery. IC Role / Device Role / Timing Role: Dual-output PoL regulator providing isolated 2.8V (sensor core) and 1.8V (interface/serializer) rails from 12V coax line. Use Value: 3.2MHz operation enables 22µF ceramic output caps per rail, reducing height and improving vibration tolerance versus tantalum-based solutions. |
Use Scenario: Compact front camera powering high-resolution image sensor and radar fusion processor in limited-space bumper housing. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering sequenced 2.8V and 1.8V rails with 180° phase shift to suppress input ripple into shared 12V vehicle bus. Use Value: Factory-preset outputs eliminate feedback resistor placement errors and reduce BOM count by two precision resistors per camera. |
| Rear-View Parking Camera | In-Cabin Driver Monitoring System |
|
Use Scenario: Low-profile rear camera module mounted on license plate bracket, powered via thin-gauge coax cable. IC Role / Device Role / Timing Role: High-voltage tolerant step-down converter accepting 3.5V–17V input with 500mV EN hysteresis for reliable startup over 2m coax runs. Use Value: 500mV EN hysteresis prevents false turn-off during slow battery ramp-up in cold cranking conditions (e.g., <5V for >100ms). |
Use Scenario: In-cabin IR camera system requiring ultra-low EMI to avoid interference with infotainment RF bands. IC Role / Device Role / Timing Role: EMI-optimized dual buck supplying 2.8V (IR LED driver) and 1.8V (imaging pipeline) with spread-spectrum modulation enabled. Use Value: Spread-spectrum reduces 3.2MHz harmonic peaks by ±3%, easing CISPR 25 Class 5 radiated emissions compliance without added shielding. |
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 |
|---|---|---|---|
| MAX20020ATBB/V+ | EN controls only Buck 2; Buck 1 starts automatically when VSUP > 5.5V. Same 2.8V/1.8V outputs and 3.2MHz frequency. | Used where Buck 1 must power up independently of host controller (e.g., always-on camera wake-up path). | Select MAX20020ATBB/V+ if system requires autonomous Buck 1 startup without EN assertion; otherwise MAX20019ATBB/V+ offers full EN control. |
| TPS650362ARSLR | 2.2MHz dual buck (3.3V/1.8V), 600mA per channel, 2.7V–5.5V input, no spread spectrum, QFN-16 package. | Limited to low-voltage systems (e.g., USB-powered camera accessories); lacks 17V input and AEC-Q100 qualification. | Choose TPS650362ARSLR only for non-automotive, low-input-voltage (<6V) applications where AEC-Q100 is not required. |
Compared with MAX20020ATBB/V+, MAX20019ATBB/V+ provides full EN control over both rails - critical for synchronized power sequencing in multi-camera systems. Versus TPS650362ARSLR, it supports automotive input range and EMI mitigation but trades off higher minimum input voltage for robustness.
Availability
MAX20019ATBB/V+ is available at Aetrix Electronics and suitable for automotive surround-view camera modules, ADAS front-facing cameras, and in-cabin driver monitoring systems requiring stable component supply, AEC-Q100 compliance, and compact dual-rail power conversion.
Supply support for MAX20019ATBB/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 MAX20019/MAX20020 product line was designed specifically for automotive camera power delivery - integrating high-voltage input capability, coax-friendly enable logic, and EMI-optimized dual-buck architecture to replace discrete DC-DC solutions in space-constrained modules.
FAQ
What output voltages does the MAX20019ATBB/V+ provide?
The MAX20019ATBB/V+ has factory-preset outputs: Buck 1 delivers 2.8V and Buck 2 delivers 1.8V. These values are laser-trimmed during manufacturing and require no external feedback components. The device does not support user-adjustable output voltages - alternative variants like MAX20019ATBA/V+ (3.3V/1.8V) or MAX20019ATBC/V+ (3.3V/1.2V) must be selected for different voltage combinations.
Is the MAX20019ATBB/V+ AEC-Q100 qualified?
Yes, the MAX20019ATBB/V+ is AEC-Q100 qualified (Grade 0) and specified for operation from -40°C to +125°C ambient temperature. Its thermal shutdown triggers at 175°C junction temperature with 15°C hysteresis, and it meets automotive reliability testing requirements including HTOL, TC, and UHAST - confirmed in the official Maxim Integrated datasheet revision 9 (January 2019).
What is the purpose of the 500mV hysteresis on the EN pin of the MAX20019ATBB/V+?
The 500mV hysteresis on the EN pin of the MAX20019ATBB/V+ ensures reliable activation and deactivation over long, high-impedance coaxial cables commonly used in automotive camera systems. It prevents oscillation during slow-rising enable signals (e.g., from remote controllers or microcontrollers with weak drivers) and maintains stable operation even with >100µs RC time constants - a key requirement for Power-over-Coax implementations.
Can the MAX20019ATBB/V+ operate with a 2.2MHz switching frequency?
No, the MAX20019ATBB/V+ is factory-programmed for 3.2MHz operation only. While the MAX20019 family includes 2.2MHz variants (e.g., MAX20019ATBJ/V+), the /V+ suffix and ordering code ATBB explicitly designate the 3.2MHz version with 2.8V/1.8V outputs and spread-spectrum enabled. Attempting to force 2.2MHz operation is not supported and would violate the device's electrical specifications.
How does the MAX20019ATBB/V+ handle overvoltage on the OUT2 rail?
The MAX20019ATBB/V+ monitors OUT2 for overvoltage conditions with rising and falling thresholds at 107% and 105% of nominal (1.8V), respectively. Upon detection, it disables both high-side and low-side MOSFETs for Buck 2 and activates a 500Ω internal pulldown resistor on OUT2 to rapidly discharge the rail. Recovery occurs automatically after die temperature stabilizes and the fault condition clears, followed by full soft-start reinitialization.
MAX20019ATBB/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Strip
- 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):
- 2.8V, 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)
MAX20019ATBB/V+ FAQ
1.How can I place an order for MAX20019ATBB/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20019ATBB/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 MAX20019ATBB/V+ reliable?
The price and inventory of MAX20019ATBB/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20019ATBB/V+ is usually 5 days.
3.What payment methods are accepted for MAX20019ATBB/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20019ATBB/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20019ATBB/V+?
MAX20019ATBB/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20019ATBB/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 MAX20019ATBB/V+?
For technical support, including MAX20019ATBB/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20019ATBB/V+ requirements.
6.How does Aetrix verify that MAX20019ATBB/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20019ATBB/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 MAX20019ATBB/V+ meets industry standards.
7.What is the process for return or replacement of MAX20019ATBB/V+?
All MAX20019ATBB/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20019ATBB/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 MAX20019ATBB/V+ part is unused and in its original packaging.
Return procedure for MAX20019ATBB/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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