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Analog Devices Inc./Maxim Integrated MAX20003CATPC/V+
- Part No.:
- MAX20003CATPC/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX20003CATPC/V+.pdf
- Description:
- IC REG BUCK PROG/1V 3A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,304
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Product details
Overview
The MAX20003CATPC/V+ from Maxim Integrated is a 3A synchronous buck converter with integrated high-side and low-side MOSFETs, designed for automotive power conversion. It operates from 3.5V to 36V input, delivers fixed 5V/3.3V or adjustable 1V–10V output, achieves 99% duty cycle in dropout, and consumes only 15µA quiescent current in skip mode-enabling reliable point-of-load regulation in navigation head units and cold-crank automotive systems.
For engineers reviewing the MAX20003CATPC/V+ datasheet, MAX20003CATPC/V+ pinout, MAX20003CATPC/V+ application, or MAX20003CATPC/V+ equivalent, key selection criteria include its AEC-Q100 qualification, 42V load-dump protection, ±1% FB accuracy for adjustable outputs, 2.2MHz max switching frequency (resistor-programmable), and spread-spectrum enablement via SPS pin for EMC-sensitive designs.
Technical Context
This current-mode step-down converter integrates dual MOSFETs and a 5V BIAS linear regulator to power internal circuitry. Its control architecture supports both forced PWM (via FSYNC) and skip mode, with cycle-by-cycle current limiting, thermal shutdown at 175°C, and fast overvoltage protection triggered at 107% of VFB.
The device uses a resistor-programmed oscillator (FOSC pin) for frequency tuning from 220kHz to 2.2MHz and features a dedicated PGOOD open-drain output with 95%/92.5% VFB thresholds and 25µs debounce. Its dual supply inputs (SUP and SUPSW) decouple bias and switch driver rails, enabling stable operation down to 3.5V during cold-crank transients.
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 (down to 3.5V) and load-dump (up to 42V). |
| Quiescent Current | 15µA in skip mode - enables always-on subsystems with minimal battery drain. |
| Switching Frequency | 220kHz–2.2MHz (resistor-programmable) - allows optimization of inductor size, efficiency, and EMI profile. |
| Output Voltage Options | Fixed 5V/3.3V (±2%) or adjustable 1V–10V (±1% FB accuracy) - supports diverse SoC, MCU, and sensor rail requirements. |
| Protection Features | 42V load-dump tolerance, 99% max duty cycle, OVP at 107% VFB, thermal shutdown at 175°C - meets ISO 16750-2 automotive stress testing. |
| AEC-Q100 Grade | Grade -40°C to +125°C - qualified for under-hood and cabin-mounted automotive electronics. |
Pinout & Package
MAX20003CATPC/V+ is housed in a 5mm × 5mm, 20-pin TQFN package with exposed pad (EP), optimized for thermal dissipation in high-power-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FOSC | Frequency-setting input | Resistor-to-ground sets switching frequency (220kHz–2.2MHz); enables EMI tuning and layout flexibility. |
| OUT | Power output node | Delivers regulated DC output; powers internal circuitry when VOUT ≥ 3V in skip mode after BIAS switchover. |
| FB | Feedback sensing input | Connects to resistive divider for adjustable outputs (1V–10V) or to BIAS for fixed 5V/3.3V; ±1% accuracy enables tight regulation. |
| COMP | Error amplifier output | External RC compensation network stabilizes current-mode loop; critical for transient response and phase margin. |
| BIAS | Internal LDO output | 5V ±0.3V regulated supply for internal logic; requires ≥2.2µF ceramic bypass to AGND for noise immunity. |
| EN | High-voltage enable input | Compatible with 3.5V–36V automotive rails (e.g., KL30, CAN INH); 2.4V threshold ensures robust startup during brownout. |
| PGOOD | Open-drain status output | Asserts high when VOUT > 95% VFB; deasserts at 92.5% VFB - simplifies power sequencing in multi-rail systems. |
| SPS | Spread-spectrum control | Logic-high enables ±3% frequency modulation (triangular, 110µs period at 2.2MHz) to reduce peak EMI emissions. |
| LX (pins 16–18) | Switching node | Drives external inductor; three parallel pins reduce trace inductance and improve thermal spreading for 3A operation. |
| PGND (pins 13–14) | Power ground return | Dedicated low-impedance path for high di/dt currents; must be connected separately from AGND to minimize noise coupling. |
| EP | Exposed thermal pad | Must be soldered to large copper pour tied to PGND - provides 2°C/W θJC for efficient heat transfer in compact modules. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates external MOSFETs and drivers; RON_H = 140mΩ max, RON_L = 70mΩ max reduces conduction loss at 3A. |
| Ultra-low quiescent current | 15µA in skip mode enables >1-year battery standby life in always-on telematics modules without compromising wake-up latency. |
| Automotive-grade protection suite | 42V load-dump tolerance, -40°C to +125°C operation, AEC-Q100 qualification, and fast OVP recovery ensure reliability in harsh environments. |
| Flexible output configuration | Single-pin FB connection to BIAS selects fixed 5V/3.3V; external resistor divider enables precise 1V–10V rails for mixed-signal SoCs. |
| EMI-reduction capability | Programmable spread spectrum (±3%) and external clock synchronization (FSYNC) allow system-level EMI compliance without added filters. |
Applications
| Navigation Head Unit Power Supply | Automotive Camera Module Rail |
|---|---|
Use Scenario: Powers display controller, touch processor, and audio codec in centralized infotainment head units requiring stable 3.3V/5V rails under wide battery voltage swings. IC Role / Device Role / Timing Role: Primary DC-DC regulator delivering 3A at 3.3V with fast transient response to handle burst-mode GPU activity. Use Value: 99% duty cycle maintains regulation during 6V cold-crank events; PGOOD enables safe boot sequencing with host MCU. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view cameras mounted in door mirrors or bumpers. IC Role / Device Role / Timing Role: Point-of-load converter providing clean 1.8V or 2.8V rail derived from adjustable FB divider; operates in forced-PWM mode to suppress switching noise near analog video paths. Use Value: ±1% FB accuracy ensures consistent sensor bias across temperature; spread-spectrum mode reduces EMI that could distort image data. |
| Telematics Control Unit (TCU) Core Supply | Body Control Module (BCM) Subsystem Rail |
Use Scenario: Generates 1.1V core voltage for LTE/C-V2X modems and application processors in always-connected TCUs. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in skip mode during idle periods to extend vehicle battery life between ignition cycles. Use Value: 15µA quiescent current minimizes parasitic drain; EN pin directly driven by CAN transceiver INH signal for automatic wake/sleep coordination. |
Use Scenario: Powers microcontroller, LIN transceivers, and LED drivers in distributed BCM nodes located in doors, seats, or trunk compartments. IC Role / Device Role / Timing Role: Robust 5V supply with 42V load-dump protection and thermal shutdown, supporting long-term operation in unventilated enclosures. Use Value: Dual SUP/SUPSW inputs isolate gate drive from bias rail, preventing latch-up during battery jump-start transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQWR | 3.5A rating, 3.5V–36V input, 12µA IQ, but no integrated spread-spectrum or AEC-Q100 Grade 1 certification. | Lacks automotive-specific protections (e.g., 42V load-dump, cold-crank dropout support) and requires external compensation. | Preferred for industrial or commercial DC/DC where cost and footprint are prioritized over automotive qualification. |
| MPQ4433AGL-A-Z | 3A, 3.3V–36V input, 17µA IQ, AEC-Q100 Grade 1, but fixed 2.2MHz frequency and no resistor-programmable FOSC or SPS pin. | No frequency tuning or spread-spectrum control; less flexible for EMI-sensitive or multi-frequency synchronized systems. | Best suited for space-constrained automotive modules needing guaranteed 2.2MHz operation without design-time frequency adjustment. |
Compared with LM61480RQWR and MPQ4433AGL-A-Z, the MAX20003CATPC/V+ uniquely combines AEC-Q100 Grade 1, programmable spread spectrum, resistor-tuned frequency, and 99% dropout operation-making it the optimal choice for next-generation automotive power systems demanding both robustness and EMI agility.
Availability
MAX20003CATPC/V+ is available at Aetrix Electronics and suitable for automotive navigation systems, camera modules, and telematics control units requiring stable component supply with full AEC-Q100 compliance and long-term production continuity.
Supply support for MAX20003CATPC/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 MAX20003 belongs to Maxim's automotive-qualified power management portfolio, engineered specifically for harsh-environment DC-DC conversion in infotainment, ADAS, and body electronics with emphasis on low IQ, high VIN tolerance, and functional safety readiness.
FAQ
What is the maximum output current supported by the MAX20003CATPC/V+?
The MAX20003CATPC/V+ delivers up to 3A continuous output current under typical thermal conditions (TA ≤ +70°C, 4-layer board). Its LX current limit is specified at 5A minimum, and thermal shutdown activates at 175°C junction temperature-ensuring reliable operation in automotive cabin environments when properly heatsinked via the exposed pad.
Does the MAX20003CATPC/V+ support adjustable output voltages?
Yes, the MAX20003CATPC/V+ supports both fixed and adjustable outputs. Connecting FB directly to BIAS yields fixed 5V or 3.3V (±2% accuracy). For adjustable outputs from 1V to 10V, an external resistive divider is used from OUT to FB to AGND, with ±1% FB reference accuracy ensuring tight regulation across temperature and line variations.
How does the MAX20003CATPC/V+ handle automotive cold-crank conditions?
The MAX20003CATPC/V+ maintains regulation during cold-crank (as low as 3.5V input) by operating at up to 99% duty cycle. Its dual-supply architecture (SUP and SUPSW) isolates the bias regulator from the switch driver, while the internal control logic dynamically extends on-time to minimize dropout-verified across -40°C to +125°C per AEC-Q100 requirements.
What is the purpose of the SPS pin on the MAX20003CATPC/V+?
The SPS (Spread Spectrum) pin on the MAX20003CATPC/V+ enables or disables ±3% triangular frequency modulation centered on the programmed FOSC frequency. When pulled high, it reduces peak EMI emissions without external filtering; when low, it disables modulation. This feature is inactive when FSYNC synchronizes to an external clock.
Is the MAX20003CATPC/V+ qualified for automotive use?
Yes, the MAX20003CATPC/V+ is AEC-Q100 qualified for Grade 1 (-40°C to +125°C), includes 42V load-dump protection, operates over 3.5V–36V input, and features automotive-specific protections including fast OVP recovery, thermal shutdown with hysteresis, and robust EN input compatibility with KL30/KL15 rails-making it suitable for front-end and cabin-mounted automotive ECUs.
MAX20003CATPC/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Strip
- 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 (5V)
- 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)
MAX20003CATPC/V+ FAQ
1.How can I place an order for MAX20003CATPC/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20003CATPC/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 MAX20003CATPC/V+ reliable?
The price and inventory of MAX20003CATPC/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20003CATPC/V+ is usually 5 days.
3.What payment methods are accepted for MAX20003CATPC/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20003CATPC/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20003CATPC/V+?
MAX20003CATPC/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20003CATPC/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 MAX20003CATPC/V+?
For technical support, including MAX20003CATPC/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20003CATPC/V+ requirements.
6.How does Aetrix verify that MAX20003CATPC/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20003CATPC/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 MAX20003CATPC/V+ meets industry standards.
7.What is the process for return or replacement of MAX20003CATPC/V+?
All MAX20003CATPC/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20003CATPC/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 MAX20003CATPC/V+ part is unused and in its original packaging.
Return procedure for MAX20003CATPC/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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