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Analog Devices Inc./Maxim Integrated MAX20003ATPA/V+
- Part No.:
- MAX20003ATPA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX20003ATPA/V+.pdf
- Description:
- IC REG BUCK PROG/1V 3A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:258
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Product details
Overview
The MAX20003ATPA/V+ from Maxim Integrated is a 3A synchronous step-down DC-DC 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 power rails.
For engineers reviewing the MAX20003ATPA/V+ datasheet, MAX20003ATPA/V+ pinout, MAX20003ATPA/V+ application, or MAX20003ATPA/V+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade protection features (42V load-dump, -40°C to +125°C operation), and real-world design implications of its 99% duty-cycle dropout capability and spread-spectrum EMI reduction.
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 inputs (SUP and SUPSW) enable robust cold-crank operation down to 3.5V while maintaining regulation via 99% maximum duty cycle.
The IC supports three operational modes: forced PWM (via FSYNC tied to BIAS or external clock), skip mode (FSYNC to AGND), and spread-spectrum modulation (SPS high), with ±3% frequency dither centered on FOSC-set frequency. Overvoltage protection triggers at 107% VFB (10.7V at 10V output) and includes fast recovery for automotive transients.
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 - accommodates automotive battery variations including cold crank (down to 3.5V) and load dump (up to 42V). |
| Quiescent Current | 15µA in skip mode - enables always-on systems (e.g., telematics) to meet <100µA system standby budgets. |
| Switching Frequency | 220kHz to 2.2MHz (resistor-programmable) - allows trade-off between inductor size (higher fSW → smaller L) and efficiency (lower fSW → lower switching loss). |
| Output Accuracy | ±2% for fixed 5V/3.3V outputs - ensures compliance with MCU and sensor supply tolerances without external calibration. |
| Thermal Protection | 175°C shutdown with 15°C hysteresis - prevents thermal runaway during sustained overload in enclosed automotive enclosures. |
| PGOOD Threshold | 95% VOUT rising / 92.5% VOUT falling - provides precise power sequencing control for downstream processors and FPGAs. |
Pinout & Package
MAX20003ATPA/V+ uses a 20-pin 5mm × 5mm TQFN package with exposed pad (EP), optimized for thermal dissipation in automotive under-hood environments. θJA = 30°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FOSC | Frequency-setting input | Resistor-to-AGND sets switching frequency; 12kΩ yields 2.2MHz - critical for EMI filtering and inductor selection. |
| OUT | Power output node | Delivers regulated voltage; also powers internal circuitry when output is 3V–5V in skip mode - eliminates need for separate bias supply. |
| FB | Feedback input | Connects to resistive divider for adjustable output (1V–10V) or to BIAS for fixed 5V/3.3V - determines regulation accuracy (±1% FB reference). |
| COMP | Error amplifier output | External RC compensation network stabilizes control loop - required for reliable transient response across temperature and load. |
| BIAS | Internal 5V LDO output | Powers internal logic; bypassed with ≥2.2µF ceramic capacitor - supplies gate drivers and analog blocks independently of OUT. |
| EN | Enable input | High-voltage compatible (3.5V–36V logic threshold); enables direct connection to KL30 or CAN transceiver INH pin - simplifies power sequencing. |
| PGOOD | Open-drain status output | Asserts when VOUT ≥95% regulation; deasserts at ≤92.5% - used for processor reset assertion or cascaded regulator enable. |
| SPS | Spread-spectrum control | Logic-high enables ±3% triangular dither - reduces peak EMI by spreading energy across 66kHz bandwidth at 2.2MHz base. |
| FSYNC | Synchronization input | Tie to AGND for skip mode; tie to BIAS or external clock for forced PWM - enables system-level clock domain alignment. |
| LX (pins 16–18) | Switching node | Drives external inductor; three parallel pins reduce trace inductance and improve thermal performance - essential for 3A continuous conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60mΩ/35mΩ MOSFETs | Reduces external component count and PCB area; enables compact 3A solution with minimal thermal derating at +125°C ambient. |
| 42V load-dump protection | Withstands ISO 7637-2 Pulse 5a without external TVS - eliminates need for discrete clamping in automotive front-end designs. |
| Fixed 8ms soft-start | Prevents inrush current into large output capacitors; avoids bus voltage sag during power-up of multi-rail systems. |
| AEC-Q100 Grade 1 | Qualified for -40°C to +125°C junction operation - meets requirements for engine control units, ADAS sensors, and body electronics. |
| 99% duty-cycle dropout operation | Maintains regulation during cold-crank events (e.g., 5.5V input → 5V output) without external boost assist - improves system reliability. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powering 3.3V SoC, display interface, and audio codec in head-unit systems with wide battery voltage range. IC Role / Device Role / Timing Role: Primary 3A buck regulator providing clean, sequenced 3.3V rail with PGOOD monitoring. Use Value: 15µA quiescent current extends battery life in parked-telematics mode; 42V load-dump tolerance eliminates external TVS diode. |
Use Scenario: Generating stable 5V supply for CMOS image sensor and ISP in rear-view camera modules. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with fast transient response to handle sensor burst-mode current spikes. Use Value: 99% duty cycle maintains regulation during 6V cold-crank; spread-spectrum reduces EMI coupling into analog video signal path. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
|
Use Scenario: Providing 5V rail for microcontroller, LIN transceivers, and LED drivers in door module ECUs. IC Role / Device Role / Timing Role: Compact, thermally efficient buck converter with integrated FETs and EN-controlled sequencing. Use Value: 20-pin TQFN with exposed pad achieves <30°C/W θJA - sustains 3A output at +105°C ambient without heatsink. |
Use Scenario: Delivering always-on 3.3V supply to cellular modem, GNSS receiver, and secure element in connected vehicle platforms. IC Role / Device Role / Timing Role: Low-IQ buck regulator enabling <100µA system sleep current while maintaining RTC and wake-on-LIN capability. Use Value: Skip mode cuts IQ to 15µA; AEC-Q100 qualification ensures long-term reliability in 10+ year automotive service life. |
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, 14µA IQ, but no spread-spectrum or AEC-Q100 qualification | Targeted at industrial/medical rather than automotive; lacks 42V load-dump hardening | Select when AEC-Q100 is not required and lower IQ is prioritized over EMI control |
| MPQ4433AGL-AEC1-Z | 3A, 3.3V–36V input, AEC-Q100 Grade 1, 25µA IQ, fixed 2.2MHz fSW (no resistor programming) | Fixed-frequency only; no skip mode or programmable spread spectrum | Select when deterministic EMI profile is preferred over adaptive light-load efficiency |
Compared with LM61480RQWR and MPQ4433AGL-AEC1-Z, the MAX20003ATPA/V+ uniquely combines AEC-Q100 qualification, programmable spread spectrum, and skip-mode ultra-low IQ - making it optimal for automotive infotainment and ADAS where EMI, thermal, and standby power constraints coexist.
Availability
MAX20003ATPA/V+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply with full AEC-Q100 compliance and long-lifecycle support.
Supply support for MAX20003ATPA/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 precision analog, mixed-signal, and power-management ICs for automotive, industrial, and communications markets.
The MAX20003ATPA/V+ belongs to Maxim's automotive-grade power management portfolio, engineered specifically for harsh-environment DC-DC conversion in vehicles - emphasizing input ruggedness, thermal resilience, and EMI control.
FAQ
What is the maximum duty cycle supported by the MAX20003ATPA/V+?
The MAX20003ATPA/V+ supports up to 99% duty cycle, enabling operation during severe undervoltage conditions like automotive cold crank (e.g., 5.5V input sustaining 5V output). This is achieved by forcing the low-side FET on for 150ns every 12µs once off-time drops below 100ns - a feature critical for maintaining regulation without external assist circuitry in MAX20003ATPA/V+ designs.
Does the MAX20003ATPA/V+ require an external bootstrap capacitor?
Yes, the MAX20003ATPA/V+ requires a 0.1µF ceramic capacitor between BST and LX pins to properly drive the high-side MOSFET gate. This bootstrap capacitor is essential for achieving full 60mΩ RDS(on) performance and must be placed as close as possible to the BST and LX pins per layout guidelines in the MAX20003ATPA/V+ datasheet.
How does the spread-spectrum function work on the MAX20003ATPA/V+?
When the SPS pin is pulled high, the MAX20003ATPA/V+ modulates its switching frequency with ±3% triangular dither centered on the FOSC-set value (e.g., 2.2MHz ±66kHz). The modulation period scales inversely with frequency - 110µs at 2.2MHz, 550µs at 400kHz - reducing peak EMI amplitude without affecting regulation or transient response in MAX20003ATPA/V+ applications.
Can the MAX20003ATPA/V+ operate with a 3.5V input voltage?
Yes, the MAX20003ATPA/V+ operates down to 3.5V input, meeting automotive cold-crank requirements. At such low VIN, it enters high-duty-cycle mode (up to 99%) to maintain regulation. The dual-supply architecture (SUP and SUPSW) ensures internal bias remains stable even when input dips below the output voltage - a key capability confirmed for MAX20003ATPA/V+ in automotive test profiles.
What is the purpose of the FSYNC pin on the MAX20003ATPA/V+?
The FSYNC pin on the MAX20003ATPA/V+ selects operating mode: tied to AGND enables skip mode for lowest IQ; tied to BIAS or an external clock enables forced PWM for constant-frequency operation. It also synchronizes the MAX20003ATPA/V+ to external clocks within ±20% frequency deviation, supporting system-level EMI management and deterministic timing in multi-converter designs.
MAX20003ATPA/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)
MAX20003ATPA/V+ FAQ
1.How can I place an order for MAX20003ATPA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20003ATPA/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 MAX20003ATPA/V+ reliable?
The price and inventory of MAX20003ATPA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20003ATPA/V+ is usually 5 days.
3.What payment methods are accepted for MAX20003ATPA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20003ATPA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20003ATPA/V+?
MAX20003ATPA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20003ATPA/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 MAX20003ATPA/V+?
For technical support, including MAX20003ATPA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20003ATPA/V+ requirements.
6.How does Aetrix verify that MAX20003ATPA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20003ATPA/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 MAX20003ATPA/V+ meets industry standards.
7.What is the process for return or replacement of MAX20003ATPA/V+?
All MAX20003ATPA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20003ATPA/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 MAX20003ATPA/V+ part is unused and in its original packaging.
Return procedure for MAX20003ATPA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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