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Analog Devices Inc./Maxim Integrated MAX20019ATBB/V+T
- Part No.:
- MAX20019ATBB/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX20019ATBB/V+T.pdf
- Description:
- IC REG BUCK 2.8V/1.8V DL 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,366
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Product details
Overview
MAX20019ATBB/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, operates at a fixed 3.2MHz switching frequency, supports 3.5V–17V input, and features factory-preset outputs of 2.8V (Buck 1) and 1.8V (Buck 2).
For engineers reviewing the MAX20019ATBB/V+T datasheet, MAX20019ATBB/V+T pinout, MAX20019ATBB/V+T application, or MAX20019ATBB/V+T equivalent, this device offers automotive-grade reliability, spread-spectrum EMI reduction, 500mV EN hysteresis for coax cable compatibility, and 180° out-of-phase operation to minimize input ripple - critical for compact, noise-sensitive camera modules.
Technical Context
The MAX20019ATBB/V+T implements peak current-mode PWM control with load-line architecture for precise transient response and optimized output capacitance sizing. 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), features cycle-by-cycle current limiting, thermal shutdown with 15°C hysteresis, and OUT2 overvoltage protection with 105–107% thresholds. The 10-pin TDFN package includes an exposed pad for thermal management and supports all-ceramic external components due to high-frequency operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 17V - supports Power-over-Coax in automotive camera systems with wide battery transients. |
| Switching Frequency | 3.2MHz - enables use of sub-3µH inductors and 22µF ceramic output capacitors, reducing solution size. |
| Output Voltages | Buck 1 = 2.8V ±3%, Buck 2 = 1.8V ±3% - factory-trimmed, no external feedback resistors required. |
| Output Current | 500mA per channel - sufficient for image sensor, ISP, and SerDes IC power domains in 1MP–5MP cameras. |
| EN Input Hysteresis | 500mV - allows reliable enable/disable over long, high-impedance coax cables without signal degradation. |
| Thermal Shutdown | 175°C threshold with 15°C hysteresis - ensures safe recovery after overload or ambient overheating in sealed enclosures. |
| AEC-Q100 Grade | Grade 0 (−40°C to +125°C junction) - qualified for front-end ADAS camera placement under hood or bumper. |
Pinout & Package
MAX20019ATBB/V+T is housed in a 2mm × 3mm × 0.75mm, 10-pin TDFN package with exposed pad (EP), RoHS-compliant and automotive-qualified. Thermal resistance θJA = 63.8°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SUP | Voltage supply input & high-side switch rail | Powers internal LDO and Buck 1 switches; requires 10µF X5R ceramic capacitor to PGND. |
| 2 LX1 | Buck 1 inductor switching node | Connects to 2.2µH–3.3µH inductor; internal clamp diodes to PGND/AGND/SUP limit voltage stress. |
| 3 PGND | Power ground | Must be tied to AGND and soldered to EP for thermal conduction and low-noise return path. |
| 4 LX2 | Buck 2 inductor switching node | Connects to 2.2µH inductor; internal clamps to PV2 and PGND prevent reverse conduction damage. |
| 5 PV2 | Buck 2 input & Buck 1 output sense | Short, wide trace from Buck 1 output (2.8V) to PV2 sets Buck 2 input rail; critical for regulation accuracy. |
| 6 OUT2 | Buck 2 feedback sense | Internal 180kΩ pulldown enabled during shutdown/OV/thermal fault; eliminates floating output. |
| 7 BIAS | 5V linear regulator output | Powers internal circuitry; bypassed with 2.2µF ceramic to AGND; max 15mA load capability. |
| 8 AGND | Analog ground reference | Must connect to PGND at single point near input capacitor to avoid noise coupling into feedback paths. |
| 9 EN | High-voltage enable with hysteresis | 500mV hysteresis (1.0V–1.5V rising); compatible with 12V coax cable drive without level-shifting. |
| 10 BST | Buck 1 high-side gate driver supply | Requires 0.1µF ceramic capacitor between BST and LX1; enables efficient n-MOSFET gate drive. |
| EP | Exposed thermal pad | Not electrically active; must be soldered to solid ground plane with ≥4 thermal vias for θJC = 11.7°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | ±3% frequency dithering reduces peak EMI by >10dB, easing CISPR-25 Class 5 compliance in camera modules. |
| 180° out-of-phase operation | Halves input-current ripple amplitude vs. in-phase dual buck, relaxing input capacitor RMS current rating by ~30%. |
| No external soft-start components | Internal 1.3ms soft-start timer prevents inrush current; eliminates need for RC networks or external timers. |
| Automotive temperature range | −40°C to +125°C operation with guaranteed performance - validated across full junction range, not just derated specs. |
| Overvoltage protection on OUT2 | 105–107% OV threshold with automatic shutdown and 500Ω pulldown - protects downstream 1.8V image sensors from overvoltage faults. |
Applications
| Surround-View Camera Module | ADAS Front-Facing Camera |
|---|---|
Use Scenario: Powering CMOS image sensor, ISP, and serializer in a compact rear-view camera housing mounted on vehicle tailgate. IC Role / Device Role / Timing Role: Dual-output PoC receiver-side power manager delivering 2.8V (sensor analog core) and 1.8V (digital logic/MIPI interface). Use Value: 3.2MHz operation enables <3mm² total passive area; 500mV EN hysteresis tolerates 3m coax cable run without false triggering during cold cranking. |
Use Scenario: Supplying 2.8V and 1.8V rails to a high-resolution forward-facing camera used for lane departure warning and automatic emergency braking. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 12V battery to tightly regulated low-voltage rails with minimal layout area. Use Value: AEC-Q100 Grade 0 qualification ensures operation at +125°C ambient; 180° phasing reduces conducted EMI into radar co-location bands. |
| In-Cabin Driver Monitoring System | 360° Camera ECU |
Use Scenario: Powering IR-illuminated image sensor and SoC in a compact dashboard-mounted driver attention monitor. IC Role / Device Role / Timing Role: Compact dual-buck converter providing isolated 2.8V (sensor bias) and 1.8V (SoC I/O) from shared 12V bus. Use Value: Spread-spectrum mode suppresses switching noise near sensitive audio ADC inputs; TDFN package fits within 8mm × 8mm PCB footprint. |
Use Scenario: Centralized power management unit supplying four camera channels in a vehicle's 360° bird's-eye view system. IC Role / Device Role / Timing Role: One MAX20019ATBB/V+T per camera channel, each independently enabled via coax-linked EN signals. Use Value: Factory-preset outputs eliminate trimming resistors and calibration; thermal shutdown with auto-recovery maintains uptime during intermittent overheating. |
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+ | Buck 1 starts only when VSUP > 5.5V; EN controls Buck 2 only - different sequencing behavior vs. MAX20019ATBB/V+T's unified EN control. | Required where Buck 1 must be powered from stabilized 5V rail (e.g., post-LDO), not directly from battery. | Select MAX20020ATBB/V+ when independent Buck 2 enable timing is needed and Buck 1 is pre-regulated. |
| TPS650362ARSLR | 2.2MHz fixed frequency, 3A/2A outputs, no spread spectrum, QFN-24 package - higher current but larger footprint and no coax-compatible EN hysteresis. | Suitable for non-automotive industrial vision systems requiring higher output current and simpler enable logic. | Choose TPS650362ARSLR only if >500mA per rail is required and EMI constraints are less stringent than CISPR-25. |
Compared with MAX20020ATBB/V+, the MAX20019ATBB/V+T provides unified enable control ideal for coax-powered cameras; versus TPS650362ARSLR, it trades current headroom for automotive qualification, EMI suppression, and ultra-compact 2mm×3mm packaging - essential for space-constrained camera housings.
Availability
MAX20019ATBB/V+T 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 delivery.
Supply support for MAX20019ATBB/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, with deep expertise in high-reliability DC-DC conversion.
The MAX20019/MAX20020 product line targets automotive camera power systems, emphasizing ultra-small footprint, EMI robustness, coax cable compatibility, and AEC-Q100 Grade 0 operation - solving key challenges in next-generation ADAS sensor nodes.
FAQ
What output voltages does the MAX20019ATBB/V+T provide?
The MAX20019ATBB/V+T has factory-preset outputs: Buck 1 delivers 2.8V ±3% and Buck 2 delivers 1.8V ±3%. These values are laser-trimmed during production and require no external feedback resistors. The 2.8V/1.8V combination is optimized for powering CMOS image sensor analog cores and digital interfaces like MIPI CSI-2 in automotive cameras.
Does the MAX20019ATBB/V+T support spread-spectrum frequency modulation?
Yes, the MAX20019ATBB/V+T includes optional spread-spectrum modulation with ±3% frequency dithering around its 3.2MHz switching frequency. This feature is enabled by default in the /V+ variant and significantly reduces peak radiated emissions, helping camera modules meet CISPR-25 Class 5 EMI requirements without additional shielding or filtering.
What is the purpose of the PV2 pin on the MAX20019ATBB/V+T?
The PV2 pin on the MAX20019ATBB/V+T serves two functions: it supplies the input voltage to Buck 2 and senses the output voltage of Buck 1. It must be connected via a short, wide trace directly to the Buck 1 output (2.8V). This configuration allows Buck 2 to operate from a clean, regulated intermediate rail - improving efficiency and reducing noise coupling into the 1.8V domain.
How does the EN pin hysteresis benefit automotive camera designs?
The MAX20019ATBB/V+T EN pin features 500mV hysteresis (1.0V to 1.5V rising threshold), enabling reliable operation over long, low-cost coaxial cables used in automotive camera links. This prevents false turn-on/off during slow voltage ramps caused by cable capacitance and contact resistance - a common issue in Power-over-Coax implementations during cold-cranking or battery recovery.
Is the MAX20019ATBB/V+T thermally protected?
Yes, the MAX20019ATBB/V+T includes thermal shutdown protection that activates at approximately 175°C junction temperature, with 15°C hysteresis for automatic recovery. When triggered, switching halts and the device re-enters soft-start once temperature falls below ~160°C. This safeguard ensures robust operation in sealed camera housings exposed to high under-hood temperatures.
MAX20019ATBB/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):
- 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+T FAQ
1.How can I place an order for MAX20019ATBB/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20019ATBB/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 MAX20019ATBB/V+T reliable?
The price and inventory of MAX20019ATBB/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 MAX20019ATBB/V+T is usually 5 days.
3.What payment methods are accepted for MAX20019ATBB/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20019ATBB/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20019ATBB/V+T?
MAX20019ATBB/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20019ATBB/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 MAX20019ATBB/V+T?
For technical support, including MAX20019ATBB/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20019ATBB/V+T requirements.
6.How does Aetrix verify that MAX20019ATBB/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20019ATBB/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 MAX20019ATBB/V+T meets industry standards.
7.What is the process for return or replacement of MAX20019ATBB/V+T?
All MAX20019ATBB/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20019ATBB/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 MAX20019ATBB/V+T part is unused and in its original packaging.
Return procedure for MAX20019ATBB/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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