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Analog Devices Inc./Maxim Integrated MAX20003ATPA/V+W
- Part No.:
- MAX20003ATPA/V+W
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX20003ATPA/V+W.pdf
- Description:
- IC REG BUCK PROG/1V 3A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,379
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Product details
Overview
MAX20003ATPA/V+W 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, delivering 5V/3.3V fixed or 1V–10V adjustable output, 220kHz–2.2MHz programmable switching frequency, and 15µA quiescent current in skip mode - designed for automotive power rails in navigation units and radio head units.
For engineers reviewing the MAX20003ATPA/V+W datasheet, MAX20003ATPA/V+W pinout, MAX20003ATPA/V+W application, or MAX20003ATPA/V+W equivalent, key selection criteria include AEC-Q100 qualification, 42V load-dump protection, 99% max duty cycle for cold-crank support, ±1% FB regulation accuracy, and spread-spectrum enablement for EMC compliance.
Technical Context
This current-mode buck controller integrates dual MOSFETs, a 5V BIAS LDO, open-drain PGOOD, and internal soft-start (8ms). It supports forced PWM or skip mode via FSYNC logic control and features cycle-by-cycle current limiting, thermal shutdown at 175°C, and overvoltage protection triggered at 107% of VFB.
The device uses a resistor-programmed oscillator (FOSC pin) and offers spread-spectrum modulation (±3% around fSW) when SPS is high. Its dual supply inputs (SUP and SUPSW) decouple bias and switch driver domains, enabling robust operation during undervoltage transients down to 3.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports automotive infotainment SoCs and ADAS sensors requiring stable 3.3V/5V rails. |
| 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 systems (e.g., telematics wake-up circuits) without battery drain. |
| Switching Frequency | 220kHz to 2.2MHz (resistor-programmable) - allows optimization between EMI (lower fSW) and solution size (higher fSW). |
| Output Accuracy | ±2% for fixed 5V/3.3V; ±1% FB reference (0.99V–1.01V) for adjustable outputs - ensures reliable MCU and sensor power sequencing. |
| Duty Cycle Max | 99% - sustains regulation during deep undervoltage events (e.g., engine start), minimizing dropout voltage. |
| PGOOD Threshold | 95% VOUT rising / 92.5% VOUT falling - provides precise power-rail monitoring for system reset and safety logic. |
Pinout & Package
MAX20003ATPA/V+W is housed in a 5mm × 5mm, 20-pin TQFN package with exposed pad (EP), RoHS-compliant, thermal θJA = 30°C/W on 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FOSC | Frequency-setting input | Resistor-to-AGND sets fSW (220kHz–2.2MHz); determines inductor/capacitor sizing and EMI profile. |
| OUT | Power output node | Delivers regulated 3.3V/5V or adjustable 1V–10V; supplies internal circuitry when VOUT ≥ 3V in skip mode. |
| FB | Feedback sensing input | Monitors output via resistive divider; 1V reference enables precise output programming with ±1% accuracy. |
| COMP | Error amplifier output | Connects external RC compensation network to stabilize control loop across line/load/temperature. |
| BIAS | Internal 5V LDO output | Powers analog blocks; requires ≥2.2µF ceramic bypass to AGND for noise immunity and startup reliability. |
| EN | High-voltage enable input | Logic-compatible with 3.5V–36V; enables direct connection to KL30 or CAN transceiver INH pin. |
| SUPSW | High-side switch supply | Separate rail for gate drivers; bypassed with 0.1µF + 4.7µF ceramics to PGND for transient robustness. |
| SUP | Main supply input | Feeds internal bias regulator; bypassed with 2.2µF ceramic to PGND; supports full 3.5V–36V VIN range. |
| PGOOD | Open-drain status output | Asserts high when VOUT ≥ 95% target; used for power sequencing, reset generation, and fault reporting. |
| SPS | Spread-spectrum control | High = ±3% triangular modulation enabled; reduces peak EMI without external components. |
| PGND | Power ground (pins 13,14) | Low-impedance return path for LX current; must be connected to EP and separated from AGND at single point. |
| BST | Bootstrap supply | Connected via 0.1µF capacitor to LX; provides gate drive voltage for high-side MOSFET. |
| LX | Switching node (pins 16–18) | Drives external inductor; high di/dt node requiring tight layout and Kelvin grounding to minimize ringing. |
| FSYNC | Sync mode select | AGND = skip mode; BIAS or external clock = forced PWM; enables system-level clock synchronization. |
| N.C. | No connection (pin 19) | Unbonded; must remain floating - no routing or copper fill allowed. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive (-40°C to +125°C junction), including load-dump (42V), cold-crank (3.5V), and thermal shutdown (175°C). |
| Integrated dual MOSFETs | 60mΩ high-side / 35mΩ low-side RDS(on) - eliminates external FETs and gate drivers, reducing BOM count and PCB area. |
| Programmable spread spectrum | ±3% frequency dithering centered on fSW - lowers EMI peaks by >10dB without added filtering components. |
| Fixed 8ms soft-start | Prevents inrush current and output overshoot during power-up - eliminates need for external soft-start timing components. |
| 42V load-dump protection | Withstands ISO 7637-2 Pulse 5a transients - enables direct battery connection without upstream TVS or suppressor diodes. |
| PGOOD with hysteresis | 95%/92.5% thresholds with 25µs debounce - delivers clean, glitch-free power-good signal for microcontroller reset and safety monitoring. |
Applications
| Automotive Navigation Unit | ADAS Camera Power Supply |
|---|---|
Use Scenario: Powers display processor, GPS module, and touch controller in center-stack infotainment system under varying battery conditions. IC Role / Device Role / Timing Role: Primary 5V/3.3V POL regulator delivering 3A with cold-crank hold-up and load-dump immunity. Use Value: Maintains uninterrupted operation during engine start (3.5V VIN) and prevents brownout resets using 99% duty cycle and 15µA quiescent current. |
Use Scenario: Supplies image sensor and ISP in forward-facing camera module exposed to harsh thermal and EMI environments. IC Role / Device Role / Timing Role: High-reliability 3.3V buck converter with AEC-Q100 qualification and ±1% output accuracy for sensor bias stability. Use Value: Ensures consistent pixel response and low-noise imaging by rejecting conducted EMI via spread-spectrum mode and low-output-ripple design. |
| Telematics Control Unit (TCU) | Automotive Radio Head Unit |
Use Scenario: Provides always-on 3.3V rail for cellular modem and GNSS receiver in vehicle connectivity gateway. IC Role / Device Role / Timing Role: Low-IQ buck converter enabling battery-backed operation with <15µA sleep current and fast wake-up. Use Value: Extends parked vehicle battery life beyond 30 days while supporting LTE/NB-IoT wake-on-event functionality. |
Use Scenario: Generates 5V for audio DSP and 3.3V for microcontroller in AM/FM/DAB radio module with CAN interface. IC Role / Device Role / Timing Role: Dual-output-capable buck regulator with EN pin compatible with CAN transceiver inhibit signal. Use Value: Enables seamless power sequencing with vehicle bus - EN tied to CAN INH allows synchronized sleep/wake with network activity. |
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 | 4A rating, 3.5V–36V input, 14µA IQ, but no spread-spectrum or AEC-Q100 grade; requires external compensation. | Targeted at industrial/communications; lacks automotive transient robustness and integrated EMI reduction. | Select when higher current headroom is needed and automotive qualification is not required. |
| TPS543320RGER | 3A, 4.5V–18V input, 12µA IQ, PMBus interface, but narrower VIN range and no 42V load-dump rating. | Designed for server POL; lacks cold-crank support and automotive temperature range. | Choose for digitally controlled, multi-rail systems where telemetry and dynamic margining are prioritized. |
Compared with LM61480RQR and TPS543320RGER, MAX20003ATPA/V+W uniquely combines AEC-Q100 qualification, 42V load-dump tolerance, 3.5V cold-crank operation, and integrated spread-spectrum - making it the only drop-in fit for demanding automotive front-end power stages.
Availability
MAX20003ATPA/V+W is available at Aetrix Electronics and suitable for automotive navigation units, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature and transient conditions.
Supply support for MAX20003ATPA/V+W 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.
MAX20003 belongs to Maxim's automotive-grade power portfolio, engineered specifically for robust DC-DC conversion in harsh vehicular environments - emphasizing AEC-Q100 compliance, wide VIN, and transient resilience.
FAQ
What is the maximum output current capability of the MAX20003ATPA/V+W?
The MAX20003ATPA/V+W delivers up to 3A continuous output current under typical conditions (TA ≤ +70°C, proper thermal layout). Its LX current limit is specified at 3.75A (min) to 6.25A (max), ensuring reliable operation across temperature and process variation. Derating applies above +70°C ambient per the 33.3mW/°C thermal derating curve.
Does the MAX20003ATPA/V+W support fixed 5V output without external resistors?
Yes, the MAX20003ATPA/V+W supports fixed 5V output by connecting the FB pin directly to the BIAS pin. This configuration leverages the internal 1V feedback reference and achieves ±2% output accuracy across line, load, and temperature - eliminating the need for external resistor dividers in standard 5V applications.
How does the MAX20003ATPA/V+W handle automotive load-dump transients?
The MAX20003ATPA/V+W withstands 42V load-dump transients (per ISO 7637-2 Pulse 5a) on both SUP and SUPSW pins. Its internal protection architecture clamps energy and maintains regulation without latch-off, enabling direct battery connection without external TVS diodes in most automotive front-end designs.
Can the MAX20003ATPA/V+W operate during cold-crank conditions?
Yes, the MAX20003ATPA/V+W operates down to 3.5V input and supports 99% maximum duty cycle to sustain output regulation during cold-crank events. When VIN drops near VOUT, the device enters dropout mode automatically - maintaining 3.3V/5V output with minimal voltage drop across the integrated MOSFETs.
Is the MAX20003ATPA/V+W pin-compatible with other devices in the MAX2000x family?
The MAX20003ATPA/V+W shares identical pinout and package (20-pin TQFN) with MAX20002 variants and MAX20003C/E versions. However, differences in internal OVP thresholds, BIAS UVLO hysteresis, and spread-spectrum behavior mean functional substitution requires validation against specific application requirements - especially for automotive transient immunity.
MAX20003ATPA/V+W 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 (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+W FAQ
1.How can I place an order for MAX20003ATPA/V+W through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20003ATPA/V+W 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+W reliable?
The price and inventory of MAX20003ATPA/V+W 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+W is usually 5 days.
3.What payment methods are accepted for MAX20003ATPA/V+W?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20003ATPA/V+W transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20003ATPA/V+W?
MAX20003ATPA/V+W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20003ATPA/V+W 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+W?
For technical support, including MAX20003ATPA/V+W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20003ATPA/V+W requirements.
6.How does Aetrix verify that MAX20003ATPA/V+W is sourced from the original manufacturer or authorized distributors?
All MAX20003ATPA/V+W 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+W meets industry standards.
7.What is the process for return or replacement of MAX20003ATPA/V+W?
All MAX20003ATPA/V+W units undergo pre-shipment inspection (PSI). If there is an issue with MAX20003ATPA/V+W, 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+W part is unused and in its original packaging.
Return procedure for MAX20003ATPA/V+W:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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