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Analog Devices Inc./Maxim Integrated MAX20003CATPB/VY+
- Part No.:
- MAX20003CATPB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX20003CATPB/VY+.pdf
- Description:
- IC REG BUCK PROG/1V 3A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,412
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Product details
Overview
MAX20003CATPB/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 point-of-load regulation.
For engineers reviewing the MAX20003CATPB/VY+ datasheet, MAX20003CATPB/VY+ pinout, MAX20003CATPB/VY+ application, or MAX20003CATPB/VY+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade protection features (42V load-dump, -40°C to +125°C), and real-world design meaning for power sequencing, EMI reduction via spread spectrum, and dropout operation at 99% duty cycle.
Technical Context
This device implements current-mode control with internal transconductance error amplifier (700µS), fixed 8ms soft-start, and dual-mode operation: forced PWM (for EMI-sensitive systems) and skip mode (for ultra-low IQ). The 99% maximum duty cycle enables stable regulation during cold-crank transients down to 3.5V input.
It integrates a 5V BIAS linear regulator (±2% accuracy, 4.7–5.4V output), open-drain PGOOD with 92.5–95% VFB thresholds, and programmable spread spectrum (±3% frequency modulation, 110µs period at 2.2MHz) activated via SPS pin-disabled only when synchronized to external clock on FSYNC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports automotive infotainment modules requiring stable 3.3V/5V rail under full load. |
| 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 subsystems (e.g., CAN wake-up logic) without draining battery. |
| Switching Frequency | 220kHz to 2.2MHz (resistor-programmable) - allows trade-off between inductor size (higher fSW) and conduction loss (lower fSW). |
| Output Voltage Options | Fixed 3.3V/5V (±2%) or adjustable 1V–10V (±1% FB accuracy) - supports mixed-voltage SoC domains and legacy analog rails. |
| Protection Features | 42V load-dump tolerance, cycle-by-cycle current limit (6.25A peak), thermal shutdown (175°C), OVP (107% VOUT) - meets ISO 7637-2 pulse 5a requirements. |
| Temperature Range | -40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and dashboard mounting. |
Pinout & Package
MAX20003CATPB/VY+ is housed in a 5mm × 5mm, 20-pin TQFN package with exposed pad (EP), RoHS-compliant, thermal resistance θJA = 30°C/W (4-layer board). The EP must be soldered to a large contiguous PGND copper plane for thermal management and cannot serve as sole ground connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FOSC | Frequency-setting input | Connect resistor to AGND to set fSW (e.g., 12kΩ → 2.2MHz); determines inductor/capacitor sizing and EMI profile. |
| OUT | Power output node | Delivers regulated voltage; also powers internal circuitry when VOUT ≥3V in skip mode after BIAS switchover. |
| FB | Feedback sensing input | Monitors output via resistive divider (1V reference); connects directly to BIAS for fixed 3.3V/5V operation. |
| COMP | Error amplifier output | Interface for external RC compensation network to stabilize control loop across line/load/temp variations. |
| BIAS | Internal LDO output | 5V ±2% regulated supply for internal logic; requires ≥2.2µF ceramic bypass to AGND for stability. |
| EN | High-voltage enable input | Logic-compatible with 3.5V–36V sources (e.g., KL30, CAN transceiver INH); 2.4V threshold enables direct battery tie. |
| SUP / SUPSW | Dual supply inputs | SUP powers bias regulator; SUPSW powers high-side switch - decoupled to minimize noise coupling into gate drive. |
| PGOOD | Open-drain status output | Asserts high when VOUT >95% regulation; used for power sequencing with downstream ICs or microcontrollers. |
| SPS | Spread-spectrum control | Pull high to enable ±3% triangular frequency modulation - reduces peak EMI without changing layout or filters. |
| FSYNC | External clock sync input | Connect to AGND for skip mode; to BIAS or external clock for forced PWM - enables system-level EMI coordination. |
| LX (pins 16–18) | Switching node | Drives external inductor; requires low-ESR 0.1µF BST capacitor between LX and BST for high-side gate charge. |
| PGND / AGND | Separate ground returns | PGND handles high di/dt switch currents; AGND carries precision analog signals - must be joined at single point near EP. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates external MOSFETs and drivers - reduces BOM count by ≥6 components and PCB area by >40% vs discrete solutions. |
| 99% max duty cycle | Enables regulation during automotive cold-crank events (VIN ≤4V) without output collapse - no external boost required. |
| 15µA skip-mode IQ | Extends battery life in always-on vehicle modules (e.g., telematics, alarm sensors) for >1 year on typical 12Ah lead-acid battery. |
| AEC-Q100 Grade 1 | Validated for automotive use - includes HTOL, temperature cycling, and ESD testing per stress test conditions. |
| Programmable spread spectrum | Reduces 6dB peak radiated emissions at fundamental switching frequency - simplifies EMC certification for Tier-1 suppliers. |
| 42V load-dump protection | Withstands ISO 7637-2 Pulse 5a (42V/100ms) without derating or external TVS - eliminates need for upstream clamping diodes. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers DSP, display interface, and audio codec in head-unit with variable load (100mA–3A). IC Role / Device Role / Timing Role: Primary 5V/3.3V POL regulator with PGOOD sequencing and spread-spectrum EMI control. Use Value: Meets CISPR 25 Class 5 radiated emissions limits without ferrite beads or shielding cans due to ±3% frequency modulation. |
Use Scenario: Supplies image sensor and ISP in rear-view camera exposed to engine bay temperature swings (-40°C to +105°C). IC Role / Device Role / Timing Role: High-reliability 3.3V buck converter with 42V load-dump tolerance and thermal shutdown recovery. Use Value: Survives repeated 42V/100ms load-dump pulses while maintaining <1% output deviation - avoids frame drop or sensor reset. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Regulates 3.3V rail for microcontroller, LIN transceivers, and LED drivers in door module. IC Role / Device Role / Timing Role: Always-on buck with 15µA skip-mode IQ, EN controlled by ignition signal, PGOOD for MCU reset holdoff. Use Value: Draws <25µA total system standby current - extends key-off battery life beyond OEM 30-day requirement. |
Use Scenario: Powers cellular modem, GNSS receiver, and CAN controller in connected vehicle gateway. IC Role / Device Role / Timing Role: Dual-rail source (5V for modem, 3.3V for GNSS) with FSYNC synchronization to reduce system-wide EMI peaks. Use Value: Enables simultaneous LTE transmission and GPS acquisition without RF interference - verified per 3GPP TS 36.101. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRNXTQ1 | 3.5A output, 3.5V–36V input, 14µA IQ, fixed 2.1MHz fSW, no spread spectrum, smaller 3mm × 4mm QFN | Lacks programmable frequency and spread spectrum - less flexible for EMI tuning; better suited for space-constrained but EMI-tolerant designs. | Select when board area is critical and system-level EMI filtering is already implemented; verify thermal performance at 3A continuous. |
| TPS543B20RTWR | 3A output, 4.5V–18V input, 12µA IQ, 400kHz–2.2MHz fSW, PMBus interface, no AEC-Q100 grade | Lower VIN range excludes cold-crank support; digital interface adds complexity but enables telemetry and dynamic margining. | Choose for non-automotive industrial applications requiring telemetry or adaptive voltage scaling; not suitable for automotive qualification. |
Compared with LM61480QRNXTQ1 and TPS543B20RTWR, MAX20003CATPB/VY+ uniquely combines AEC-Q100 Grade 1, 3.5V cold-crank capability, and pin-enabled spread spectrum - making it the only option qualified for safety-critical automotive domains requiring both robustness and EMI compliance without external components.
Availability
MAX20003CATPB/VY+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, body control units, and telematics systems requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.
Supply support for MAX20003CATPB/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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
MAX20003 belongs to Maxim's automotive-qualified power management portfolio, designed specifically for harsh-environment DC-DC conversion in vehicles - emphasizing cold-crank resilience, load-dump survival, and EMI control for infotainment and ADAS subsystems.
FAQ
What is the maximum output current rating of the MAX20003CATPB/VY+?
The MAX20003CATPB/VY+ is rated for 3A continuous output current under specified thermal conditions (θJA = 30°C/W, TA ≤ +70°C). Its peak LX current limit is 6.25A, enabling robust transient response. Derating is required above +70°C ambient per the 33.3mW/°C thermal coefficient - at +105°C, usable output current drops to ~2.2A with proper PCB copper area.
Does the MAX20003CATPB/VY+ support fixed 5V output without external resistors?
Yes, the MAX20003CATPB/VY+ supports fixed 5V output by connecting the FB pin directly to the BIAS pin - no external feedback resistors needed. This configuration delivers ±2% output accuracy over temperature and line, verified across the full -40°C to +125°C automotive range. Fixed 3.3V operation uses the same connection method.
How does the spread spectrum function work on the MAX20003CATPB/VY+?
The MAX20003CATPB/VY+ implements spread spectrum by modulating the switching frequency ±3% around the FOSC-set center frequency using a triangular waveform with 110µs period at 2.2MHz. Activation is controlled by pulling the SPS pin high; it is automatically disabled when FSYNC is used for external synchronization. This reduces peak EMI amplitude without altering layout or filter components.
What protection features are integrated into the MAX20003CATPB/VY+?
The MAX20003CATPB/VY+ integrates cycle-by-cycle current limiting (6.25A peak), thermal shutdown (175°C trip, 160°C hysteresis), overvoltage protection (107% VOUT trip), 42V load-dump tolerance, and undervoltage lockout on BIAS (3.15V rising). All protections are fully autonomous - no external components or firmware intervention required for safe operation.
Is the MAX20003CATPB/VY+ pin-compatible with other devices in the MAX2000x family?
No, the MAX20003CATPB/VY+ is not pin-compatible with MAX20002 variants (2A version) or MAX20003 variants in different packages (e.g., T2055Y+4C). While all share identical pin numbering and function definitions, the CATPB/VY+ suffix denotes the 20-pin TQFN with exposed pad (T2055+4C outline), and substitution requires verification of thermal pad layout, land pattern (90-0009), and solder mask definition per Maxim's package drawing 21-0140.
MAX20003CATPB/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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, Wettable Flank
- Supplier Device Package:
- 20-TQFN (5x5)
MAX20003CATPB/VY+ FAQ
1.How can I place an order for MAX20003CATPB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20003CATPB/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 MAX20003CATPB/VY+ reliable?
The price and inventory of MAX20003CATPB/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20003CATPB/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20003CATPB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20003CATPB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20003CATPB/VY+?
MAX20003CATPB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20003CATPB/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 MAX20003CATPB/VY+?
For technical support, including MAX20003CATPB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20003CATPB/VY+ requirements.
6.How does Aetrix verify that MAX20003CATPB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20003CATPB/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 MAX20003CATPB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20003CATPB/VY+?
All MAX20003CATPB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20003CATPB/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 MAX20003CATPB/VY+ part is unused and in its original packaging.
Return procedure for MAX20003CATPB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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