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Analog Devices Inc./Maxim Integrated MAX20003CATPD/V+
- Part No.:
- MAX20003CATPD/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX20003CATPD/V+.pdf
- Description:
- IC REG BUCK PROG/1V 3A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,857
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Product details
Overview
MAX20003CATPD/V+ from Maxim Integrated is a 3A synchronous buck converter with integrated high-side and low-side MOSFETs, operating from 3.5V to 36V input, delivering 5V/3.3V fixed or 1V–10V adjustable output, featuring 15µA quiescent current in skip mode and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX20003CATPD/V+ datasheet, MAX20003CATPD/V+ pinout, MAX20003CATPD/V+ application, or MAX20003CATPD/V+ equivalent, this device supports critical automotive point-of-load designs requiring 42V load-dump protection, 99% dropout operation, spread-spectrum EMI reduction, and precise PGOOD monitoring under -40°C to +125°C conditions.
Technical Context
The MAX20003CATPD/V+ employs current-mode control with internal transconductance error amplifier (700µS), programmable oscillator (220kHz–2.2MHz via FOSC resistor), and dual-mode operation: forced PWM for EMI-sensitive systems and skip mode for ultra-low-noise, low-quiescent-power automotive standby states.
It integrates a 5V BIAS linear regulator (±2% accuracy, 4.7–5.4V output), monitors output regulation via FB pin (1.0V ±1% reference), and implements cycle-by-cycle current limiting (5A typical LX limit), thermal shutdown at 175°C with 15°C hysteresis, and fast overvoltage protection triggered at 107% VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports automotive infotainment and ADAS subsystems without external current boosting. |
| Input Voltage Range | 3.5V to 36V - accommodates cold-crank (down to 3.5V) and 42V load-dump transients with internal clamping. |
| Quiescent Current | 15µA in skip mode - enables always-on functionality in vehicle body control modules with minimal battery drain. |
| Switching Frequency | 220kHz to 2.2MHz (resistor-programmable) - allows optimization of inductor size, efficiency, and EMI profile per design constraints. |
| Output Accuracy | ±2% for fixed 5V/3.3V outputs - ensures reliable logic-level compliance for MCU, sensor, and interface IC power domains. |
| Thermal Rating | -40°C to +125°C ambient, 150°C junction - meets AEC-Q100 Grade 1 requirements for under-hood and dashboard applications. |
| Protection Features | 42V load-dump tolerance, OVP at 107% VOUT, thermal shutdown with auto-recovery, cycle-by-cycle current limit - eliminates need for external protection circuitry. |
Pinout & Package
MAX20003CATPD/V+ is housed in a 5mm × 5mm, 20-pin TQFN package with exposed pad (Package Code: T2055+4C), optimized for thermal dissipation in high-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FOSC | Frequency-setting input | Resistor-to-ground sets switching frequency; enables precise EMI tuning and layout-driven frequency selection. |
| OUT | Power output node | Delivers regulated DC output; powers internal circuitry during light-load BIAS switchover in 3V–5V configurations. |
| FB | Feedback reference input | Accepts resistive divider for 1V–10V adjustment or direct connection to BIAS for fixed 5V/3.3V; 1.0V ±1% reference enables high-accuracy regulation. |
| COMP | Error amplifier output | External RC compensation network stabilizes current-mode loop; supports wide range of output capacitor ESR values. |
| BIAS | Internal LDO output | 5V ±2% 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 rail; 2.4V threshold enables direct connection to KL30 or CAN transceiver INH pins. |
| PGOOD | Open-drain power-good signal | Asserts when VOUT > 95% regulation; deasserts at <92.5%; provides sequencing feedback for downstream regulators or microcontrollers. |
| SPS | Spread-spectrum control | Pull-high enables ±3% triangular frequency modulation - reduces peak EMI by spreading energy across spectrum. |
| LX (pins 16–18) | Switching node | Three parallel LX pins reduce trace inductance and thermal resistance; supports high-current 3A operation with low loss. |
| PGND (pins 13–14) | Power ground return | Dedicated low-impedance path for high di/dt currents; must be separated from AGND and connected to EP for thermal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates external MOSFETs and gate drivers; RON_H = 60–140mΩ / RON_L = 35–70mΩ reduces conduction loss and board area. |
| Ultra-low quiescent current | 15µA in skip mode enables >1-year battery life in always-on automotive modules (e.g., telematics wake-up circuits). |
| Automotive-grade robustness | AEC-Q100 qualified, 42V load-dump tolerant, -40°C to +125°C operation - certified for front-end power in ADAS and infotainment ECUs. |
| Programmable soft-start | Fixed 8ms internal soft-start prevents inrush current damage to input capacitors and downstream loads during cold-start sequences. |
| Flexible voltage configuration | Supports both fixed 5V/3.3V outputs (via FB-to-BIAS) and precision-adjustable 1V–10V outputs (±1% FB accuracy) for multi-rail systems. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, display driver, and audio codec in head-unit systems with variable battery input (6V–16V) and transient spikes. IC Role / Device Role / Timing Role: Primary 3.3V/5V point-of-load regulator with PGOOD sequencing and spread-spectrum EMI control. Use Value: Maintains stable output during 42V load-dump events and cold-crank dips to 3.5V without brownout or reset. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view cameras mounted near engine bay. IC Role / Device Role / Timing Role: High-efficiency, low-noise 3.3V buck converter with thermal shutdown and OVP for safety-critical vision systems. Use Value: Delivers 3A at 99% duty cycle during undervoltage transients while maintaining ±2% output accuracy across temperature. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
|
Use Scenario: Powers microcontroller, CAN transceivers, and door-lock actuators in centralized vehicle body electronics. IC Role / Device Role / Timing Role: Always-on 5V regulator with 15µA skip-mode quiescent current and EN-controlled wake-up capability. Use Value: Enables >10-year battery standby life in parked vehicle state while supporting fast wake-up on CAN bus activity. |
Use Scenario: Provides clean 3.3V rail for LTE modem, GNSS receiver, and secure element in cellular-connected vehicle platforms. IC Role / Device Role / Timing Role: EMI-optimized buck converter synchronized to system clock via FSYNC pin to avoid band interference. Use Value: Reduces conducted emissions by ±3% spread spectrum while maintaining tight 1% FB accuracy for RF-sensitive analog blocks. |
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 | 3.5V–36V input, 4A output, 12µA IQ, but no integrated spread-spectrum or AEC-Q100 qualification. | Targeted at industrial/telecom; lacks automotive transient robustness and PGOOD accuracy specs. | Choose LM61480RQWR only if higher current headroom is needed and automotive qualification is not required. |
| TPS62933RQWR | 3.8V–32V input, 3A output, 15µA IQ, AEC-Q100 Grade 1, but fixed 2.1MHz frequency and no resistor-programmable FOSC. | Optimized for space-constrained designs where frequency flexibility is secondary to footprint minimization. | Select TPS62933RQWR when board area is critical and fixed 2.1MHz operation satisfies EMI targets. |
Compared with LM61480RQWR and TPS62933RQWR, MAX20003CATPD/V+ uniquely combines AEC-Q100 qualification, resistor-programmable frequency (220kHz–2.2MHz), integrated spread-spectrum, and 42V load-dump tolerance - making it the only choice for cost-sensitive, thermally demanding automotive POE rails requiring full transient immunity and flexible EMI management.
Availability
MAX20003CATPD/V+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply across extended temperature and high-reliability automotive programs.
Supply support for MAX20003CATPD/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, designs high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets with emphasis on reliability and integration.
The MAX20003 belongs to Maxim's automotive-grade power management portfolio, engineered specifically for harsh-environment DC-DC conversion in vehicle ECUs where input transients, thermal stress, and long-term stability are mission-critical.
FAQ
What is the maximum duty cycle supported by MAX20003CATPD/V+ and how does it benefit automotive applications?
MAX20003CATPD/V+ supports up to 99% duty cycle operation, enabling stable regulation during severe undervoltage transients such as cold-crank events (down to 3.5V input). This ensures uninterrupted power delivery to critical loads like microcontrollers and sensors without brownout resets, directly addressing automotive ISO 16750-2 requirements.
Does MAX20003CATPD/V+ require external components for basic operation, and what are the minimum required?
Yes, MAX20003CATPD/V+ requires external components for stable operation: a single resistor on FOSC for frequency setting, an inductor (e.g., 2.2µH), input/output capacitors (≥4.7µF and ≥44µF respectively), BST capacitor (0.1µF), and BIAS bypass (2.2µF). No external MOSFETs or drivers are needed due to full integration.
How does the spread-spectrum feature of MAX20003CATPD/V+ improve EMC performance?
When enabled via the SPS pin, MAX20003CATPD/V+ modulates its switching frequency by ±3% using a triangular waveform (110µs period at 2.2MHz), spreading spectral energy and reducing peak radiated emissions. This eliminates the need for additional EMI filters in compact automotive PCBs while maintaining tight output regulation.
What protection features are built into MAX20003CATPD/V+ for automotive environments?
MAX20003CATPD/V+ includes 42V load-dump protection, cycle-by-cycle current limiting (5A typical), thermal shutdown at 175°C with 15°C hysteresis, fast overvoltage protection (107% VOUT), and input undervoltage lockout. All protections operate autonomously without firmware or external supervision.
Can MAX20003CATPD/V+ be synchronized to an external clock, and what are the timing constraints?
Yes, MAX20003CATPD/V+ accepts external synchronization via the FSYNC pin. The external clock may deviate ±20% from the internal frequency; synchronization locks within two cycles. If the external clock is absent for >2 cycles, the device reverts to internal oscillator operation - ensuring robust timing fallback in noisy automotive environments.
MAX20003CATPD/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tray
- 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)
MAX20003CATPD/V+ FAQ
1.How can I place an order for MAX20003CATPD/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20003CATPD/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 MAX20003CATPD/V+ reliable?
The price and inventory of MAX20003CATPD/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20003CATPD/V+ is usually 5 days.
3.What payment methods are accepted for MAX20003CATPD/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20003CATPD/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20003CATPD/V+?
MAX20003CATPD/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20003CATPD/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 MAX20003CATPD/V+?
For technical support, including MAX20003CATPD/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20003CATPD/V+ requirements.
6.How does Aetrix verify that MAX20003CATPD/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20003CATPD/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 MAX20003CATPD/V+ meets industry standards.
7.What is the process for return or replacement of MAX20003CATPD/V+?
All MAX20003CATPD/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20003CATPD/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 MAX20003CATPD/V+ part is unused and in its original packaging.
Return procedure for MAX20003CATPD/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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