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Analog Devices Inc./Maxim Integrated MAX20003EATPB/VY+
- Part No.:
- MAX20003EATPB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX20003EATPB/VY+.pdf
- Description:
- IC REG BUCK PROG/1V 3A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,260
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Product details
Overview
The MAX20003EATPB/VY+ from Maxim Integrated is a 3A synchronous buck converter with integrated high-side and low-side MOSFETs, operating from 3.5V to 36V input and delivering fixed 5V/3.3V or adjustable 1V–10V output. It features 15µA quiescent current in skip mode, 220kHz–2.2MHz resistor-programmable switching frequency, and AEC-Q100 qualification for automotive use in navigation units and power distribution systems.
For engineers reviewing the MAX20003EATPB/VY+ datasheet, MAX20003EATPB/VY+ pinout, MAX20003EATPB/VY+ application, or MAX20003EATPB/VY+ equivalent, key selection criteria include its 99% dropout duty cycle, ±1% FB regulation accuracy, 42V load-dump protection, -40°C to +125°C temperature range, and spread-spectrum enablement for EMC compliance in harsh automotive environments.
Technical Context
This device implements current-mode control with internal transconductance error amplifier (700µS), fixed 8ms soft-start, and cycle-by-cycle overcurrent protection. Its dual-supply architecture separates SUP (bias regulator input) and SUPSW (switch driver supply), enabling stable operation during cold-crank transients down to 3.5V.
The IC supports three operational modes: forced PWM (via FSYNC tied to BIAS or external clock), skip mode (FSYNC to AGND), and synchronized operation (external clock within ±20% of internal frequency). Spread spectrum (±3% frequency modulation, 110µs period at 2.2MHz) is enabled via SPS pin and disabled during external synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports automotive infotainment loads without external current boosting |
| Input Voltage Range | 3.5V to 36V - covers full automotive battery range including cold crank (≥3.5V) and load dump (≤42V) |
| Quiescent Current | 15µA in skip mode - enables always-on functionality in vehicle body control modules |
| Switching Frequency | 220kHz–2.2MHz, resistor-programmable - allows optimization of inductor size vs. efficiency trade-off |
| Output Accuracy | ±1% FB reference (1.00V) - ensures tight regulation across temperature and line/load variations |
| Duty Cycle Max | 99% - maintains regulation during undervoltage transients with minimal dropout voltage |
| Thermal Protection | 175°C shutdown with 15°C hysteresis - prevents thermal runaway under sustained overload |
| AEC-Q100 Grade | Grade -40°C to +125°C - qualified for under-hood and dashboard-mounted automotive applications |
Pinout & Package
MAX20003EATPB/VY+ uses a 20-pin 5mm × 5mm TQFN package with exposed pad (Package Code: T2055+4C, Outline No. 21-0140), optimized for thermal dissipation in space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FOSC | Frequency-setting input | Resistor-to-AGND sets switching frequency; determines inductor/capacitor sizing and EMI profile |
| OUT | Power output node | Delivers regulated DC output; powers internal circuitry when VOUT ≥3V in skip mode |
| FB | Feedback sensing input | Connects to resistive divider for adjustable output (1V–10V) or to BIAS for fixed 5V/3.3V |
| COMP | Error amplifier output | External RC network stabilizes control loop; critical for transient response and phase margin |
| BIAS | Internal LDO output | 5V ±0.3V linear regulator powers internal logic; requires ≥2.2µF ceramic bypass to AGND |
| EN | High-voltage enable input | Compatible with 3.5V–42V automotive rails; 2.4V threshold enables direct connection to KL30 or CAN INH |
| SUPSW | High-side switch supply | Separate input for gate driver; decoupled with 0.1µF + 4.7µF ceramics to PGND for noise immunity |
| SUP | Main supply input | Powers internal bias regulator; bypassed with 2.2µF ceramic to PGND |
| PGOOD | Open-drain power-good signal | Asserts at 95% VOUT, deasserts at 92.5% - used for sequencing downstream regulators or MCU reset |
| SPS | Spread-spectrum control | Logic-high enables ±3% frequency dithering to reduce peak EMI emissions |
| LX (pins 16–18) | Switching node | Drives external inductor; shared high-current path requiring low-inductance layout to PGND |
| PGND (pins 13–14) | Power ground return | Separate from AGND; must connect to large copper pour under EP for thermal management |
| BST | Bootstrap supply | 0.1µF capacitor between BST and LX provides gate drive voltage for high-side MOSFET |
| FSYNC | External clock sync input | Enables forced-PWM or skip mode; synchronizes to external clock within ±20% frequency tolerance |
| AGND (pin 6) | Analog reference ground | Reference for FB, COMP, and internal analog blocks; must be star-connected to avoid noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3A power stage | 60mΩ high-side + 35mΩ low-side RDS(on) MOSFETs eliminate external discrete FETs and gate drivers |
| Ultra-low IQ skip mode | 15µA no-load current extends battery life in always-on automotive subsystems |
| Automotive-grade protection | 42V load-dump tolerance, cycle-by-cycle current limit, and thermal shutdown with auto-recovery |
| Flexible output configuration | Fixed 5V/3.3V or resistor-adjustable 1V–10V output with ±1% feedback accuracy |
| EMI reduction architecture | Programmable spread spectrum (±3%) and external clock synchronization minimize conducted/radiated emissions |
| Robust power sequencing | PGOOD open-drain output and high-voltage EN simplify integration into multi-rail automotive power trees |
Applications
| Navigation Head Unit Power Supply | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powers display, audio processor, and GPS receiver in vehicle infotainment head units with wide input voltage swings. IC Role / Device Role / Timing Role: Primary 3.3V/5V step-down regulator delivering stable rail during cold crank (3.5V) and load dump (42V). Use Value: 99% duty cycle and 15µA IQ enable uninterrupted operation through automotive transients without brownout or shutdown. |
Use Scenario: Supplies microcontroller, CAN transceiver, and sensor interface in door module or lighting control unit. IC Role / Device Role / Timing Role: Always-on buck converter providing regulated 5V rail with PGOOD signaling for safe MCU boot sequencing. Use Value: AEC-Q100 Grade and -40°C to +125°C operation ensure reliability in under-dash mounting locations. |
| Distributed Automotive DC Power System | Advanced Driver Assistance Systems (ADAS) Camera Power |
|
Use Scenario: Local point-of-load conversion in centralized 12V/24V vehicle architectures feeding multiple ECUs. IC Role / Device Role / Timing Role: Secondary regulator stepping down main battery rail to 3.3V for digital logic and communication interfaces. Use Value: 220kHz–2.2MHz programmability allows EMI tuning to avoid sensitive RF bands used by radar or cellular modems. |
Use Scenario: Powers image sensor and ISP in rear-view or surround-view camera modules subject to vibration and thermal stress. IC Role / Device Role / Timing Role: High-efficiency 3A buck supplying clean 1.8V or 3.3V rail with low ripple and fast transient response. Use Value: ±1% FB accuracy and 8ms soft-start prevent sensor initialization errors during hot-plug or wake-from-sleep events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQR | 3.5V–36V input, 4A output, 12µA IQ, but no spread spectrum or AEC-Q100 qualification | Targeted at industrial/commercial DC/DC; lacks automotive transient robustness and EMI features | Select when higher output current (4A) is required and automotive qualification is not mandatory |
| TPS62933RQWR | 3V–36V input, 3A output, 15µA IQ, AEC-Q100 Grade 1, but fixed 2.1MHz frequency only | Optimized for compact designs needing fixed-frequency operation; no resistor-programmable fSW | Select when board space is constrained and 2.1MHz operation suffices for EMI filtering goals |
Compared with LM61480RQR and TPS62933RQWR, the MAX20003EATPB/VY+ uniquely combines AEC-Q100 Grade, programmable spread spectrum, 220kHz–2.2MHz frequency adjustment, and 42V load-dump protection-making it the only choice for cost-sensitive, thermally demanding automotive applications requiring full transient resilience and EMI certification support.
Availability
MAX20003EATPB/VY+ is available at Aetrix Electronics and suitable for automotive navigation systems, body control modules, and distributed power architectures requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX20003EATPB/VY+ 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 MAX20003 belongs to Maxim's automotive-qualified power management portfolio, engineered specifically for harsh-environment DC/DC conversion in infotainment, ADAS, and body electronics where reliability, efficiency, and EMI control are critical.
FAQ
What is the maximum output current capability of the MAX20003EATPB/VY+?
The MAX20003EATPB/VY+ delivers up to 3A continuous output current under typical conditions (TA = +25°C, VIN = 14V, VOUT = 5V, fSW = 2.2MHz). Its LX current limit is specified at 3.75A (min) to 6.25A (max), ensuring robust operation across temperature and process variation. Derating applies above +70°C ambient per θJA = 30°C/W.
Does the MAX20003EATPB/VY+ support adjustable output voltage?
Yes, the MAX20003EATPB/VY+ supports both fixed and adjustable outputs. Connecting FB directly to BIAS yields fixed 5V or 3.3V. For 1V–10V adjustment, use an external resistive divider from OUT to FB to AGND, leveraging the ±1% accurate 1.00V internal reference (VFB). The FB input current is only 20–100nA, minimizing divider error.
How does the MAX20003EATPB/VY+ handle automotive load dump events?
The MAX20003EATPB/VY+ withstands 42V load-dump transients (t < 1s) on the SUP and SUPSW pins without damage or regulation loss. Its internal protection circuitry clamps input voltage internally, and the 99% maximum duty cycle ensures continued operation even when input drops below nominal levels during cold crank. This meets ISO 7637-2 Pulse 5a requirements.
Can the MAX20003EATPB/VY+ be synchronized to an external clock?
Yes, the MAX20003EATPB/VY+ accepts external synchronization via the FSYNC pin. When driven with a logic-level clock signal within ±20% of the internal oscillator frequency (e.g., 1.76–2.64MHz for a 2.2MHz setting), the device locks to the external source in two cycles. FSYNC must never be left floating; tie to AGND for skip mode or BIAS for forced-PWM operation.
What thermal management provisions does the MAX20003EATPB/VY+ include?
The MAX20003EATPB/VY+ features thermal shutdown at 175°C (typ) with 15°C hysteresis for automatic recovery. Its 5mm × 5mm TQFN package has θJA = 30°C/W (four-layer board) and θJC = 2°C/W, requiring connection of the exposed pad (EP) to a large contiguous copper ground plane. Derating begins above +70°C ambient at 33.3mW/°C.
MAX20003EATPB/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V (3.3V)
- Voltage - Output (Max):
- 10V
- Current - Output:
- 3A
- Frequency - Switching:
- 220kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (5x5)
MAX20003EATPB/VY+ FAQ
1.How can I place an order for MAX20003EATPB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20003EATPB/VY+ 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 MAX20003EATPB/VY+ reliable?
The price and inventory of MAX20003EATPB/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20003EATPB/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20003EATPB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20003EATPB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20003EATPB/VY+?
MAX20003EATPB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20003EATPB/VY+ 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 MAX20003EATPB/VY+?
For technical support, including MAX20003EATPB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20003EATPB/VY+ requirements.
6.How does Aetrix verify that MAX20003EATPB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20003EATPB/VY+ 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 MAX20003EATPB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20003EATPB/VY+?
All MAX20003EATPB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20003EATPB/VY+, 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 MAX20003EATPB/VY+ part is unused and in its original packaging.
Return procedure for MAX20003EATPB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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