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Analog Devices Inc./Maxim Integrated MAX20003ATPB/V+TC2
- Part No.:
- MAX20003ATPB/V+TC2
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX20003ATPB/V+TC2.pdf
- Description:
- IC REG BUCK PROG/1V 3A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,605
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Product details
Overview
MAX20003ATPB/V+TC2 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 programmable switching frequency, and AEC-Q100 qualification for automotive point-of-load regulation.
For engineers reviewing the MAX20003ATPB/V+TC2 datasheet, MAX20003ATPB/V+TC2 pinout, MAX20003ATPB/V+TC2 application, or MAX20003ATPB/V+TC2 equivalent, key selection criteria include dropout operation at 99% duty cycle, ±1% FB accuracy for adjustable outputs, 42V load-dump protection, and spread-spectrum enablement for EMC-sensitive automotive systems.
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 control) and skip mode (for ultra-low IQ). The oscillator supports resistor-programmed frequency (RFOSC to AGND) and external synchronization via FSYNC pin with ±20% tolerance.
It integrates a 5V BIAS linear regulator (4.7–5.4V, ±2% over temp), monitors output health via open-drain PGOOD (92.5–95% VFB thresholds), and provides overvoltage protection (104–107% VOUT) with fast recovery-critical for automotive cold-crank and load-dump transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports automotive infotainment power rails 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 to 2.2MHz (resistor-programmable) - allows optimization of inductor size vs. efficiency and EMI profile |
| Output Accuracy | ±2% for fixed 5V/3.3V; ±1% FB reference (0.99–1.01V) for adjustable outputs - ensures stable MCU/SOC core voltage under thermal/voltage variation |
| Duty Cycle Max | 99% - maintains regulation during deep undervoltage transients without dropout-induced system reset |
| Thermal Protection | 175°C shutdown with 15°C hysteresis - prevents latch-up during sustained overload or poor heatsinking |
Pinout & Package
MAX20003ATPB/V+TC2 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).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FOSC | Frequency-setting input | Resistor-to-AGND sets switching frequency; enables precise EMI tuning and layout-driven noise mitigation |
| 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 1V–10V adjustment or to BIAS for fixed 5V/3.3V; ±1% reference 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 supply for analog/digital blocks; requires ≥2.2µF ceramic bypass to AGND for noise immunity |
| EN | High-voltage enable input | Logic-compatible with 3.5V–36V inputs (e.g., KL30, CAN INH); 2.4V threshold enables direct battery monitoring |
| SUPSW | High-side switch supply | Separate 3.5V–36V rail powers gate drivers; decoupled with 0.1µF + 4.7µF ceramics to suppress switching noise |
| SUP | Main supply input | Powers internal bias regulator; bypassed with 2.2µF ceramic to PGND; independent of SUPSW for robust cold-crank operation |
| PGOOD | Open-drain status output | Asserts high when VOUT > 95% VFB; deasserts at <92.5% VFB - enables safe power sequencing in multi-rail systems |
| SPS | Spread-spectrum control | Logic-high enables ±3% frequency modulation (triangular, 110µs period at 2.2MHz) - reduces peak EMI without filter redesign |
| LX (16–18) | Switching node | Three parallel pins reduce trace inductance and thermal resistance; connects to inductor and BST capacitor |
| BST | Bootstrap supply | 0.1µF capacitor between LX and BST sustains high-side gate drive during 99% duty-cycle operation |
| PGND (13–14) | Power ground return | Dedicated low-impedance path for high di/dt currents; must be separated from AGND and connected to EP |
| FSYNC | Sync clock input | Enables forced-PWM (tie to BIAS/ext clock) or skip mode (tie to AGND); synchronizes in ≤2 cycles; disables internal spread spectrum |
| EP | Exposed thermal pad | Mandatory connection to large copper ground plane; primary thermal path (θJC = 2°C/W); not sole ground reference |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates external MOSFETs and drivers - reduces BOM count, PCB area, and layout complexity for space-constrained automotive modules |
| 99% max duty cycle | Enables uninterrupted operation during 3.5V cold-crank events - avoids brownout resets in navigation head units and ADAS ECUs |
| AEC-Q100 Grade -40°C to +125°C | Validated for under-hood and cabin applications - meets automotive reliability and lifetime requirements without derating |
| 42V load-dump protection | Withstands ISO 7637-2 Pulse 5a transients without external TVS - simplifies front-end protection design in 12V/24V systems |
| Programmable spread spectrum | Reduces radiated emissions by spreading energy across ±3% bandwidth - helps pass CISPR 25 Class 5 without adding ferrites or shielding |
| Fixed 8ms soft-start | Prevents inrush current and output overshoot during power-up - eliminates need for external soft-start circuitry in infotainment supplies |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers SoC, display driver, and audio codec in car radio/navigation head units requiring stable 3.3V/5V under wide battery voltage swings. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 3A at 3.3V with PGOOD sequencing and cold-crank support. Use Value: 99% duty cycle maintains regulation during 3.5V cranking; 15µA IQ extends battery life in accessory-off state. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view cameras exposed to engine bay temperature extremes. IC Role / Device Role / Timing Role: High-reliability DC-DC converter with AEC-Q100 qualification and thermal shutdown for unattended operation. Use Value: -40°C to +125°C operation and 42V load-dump tolerance ensure functional safety without external protection components. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) Subsystem |
Use Scenario: Generates clean 5V rail for LTE modem, GNSS receiver, and CAN transceivers in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: Low-noise, spread-spectrum-enabled buck converter synchronized to system clock via FSYNC pin. Use Value: ±3% frequency modulation lowers peak EMI to meet stringent RF coexistence requirements near cellular antennas. |
Use Scenario: Provides auxiliary 3.3V supply for microcontroller, LIN transceivers, and LED drivers in centralized body electronics. IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter with EN pin tied to ignition signal for automatic wake/sleep control. Use Value: 5µA shutdown current and fast EN response (<10ms startup) minimize parasitic drain on 12V battery during vehicle sleep mode. |
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, 14µA IQ, but no integrated spread spectrum or AEC-Q100 qualification | Targeted at industrial/telecom; lacks automotive transient robustness and EMI features | Choose LM61480RQWR only if higher current headroom is required and automotive qualification is unnecessary |
| TPS543B20RJER | 4.5V–18V input, 3A output, PMBus interface, 12µA IQ, but narrower VIN range and no load-dump protection | Designed for server/datacom with digital control; unsuitable for 24V truck or cold-crank environments | Select TPS543B20RJER when digital telemetry and dynamic voltage scaling are needed, not automotive compliance |
Compared with LM61480RQWR and TPS543B20RJER, MAX20003ATPB/V+TC2 uniquely combines AEC-Q100 qualification, 42V load-dump tolerance, programmable spread spectrum, and 3.5V cold-crank capability - making it the only drop-in solution for demanding automotive power rails where reliability and EMI are co-constrained.
Availability
MAX20003ATPB/V+TC2 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, telematics control units, and body control module subsystems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX20003ATPB/V+TC2 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, emphasizing high reliability and integration.
The MAX20003 belongs to Maxim's automotive-grade power-management portfolio, engineered specifically for harsh-temperature, high-transient automotive environments with emphasis on AEC-Q100 compliance, low IQ, and EMI resilience.
FAQ
What is the maximum output current rating of the MAX20003ATPB/V+TC2?
The MAX20003ATPB/V+TC2 is rated for 3A continuous output current under specified thermal conditions (θJA = 30°C/W, TA ≤ +70°C). Its LX current limit is 3.75A (min), 5A (typ), and 6.25A (max), enabling robust overload handling in automotive transients. Derating is required above +70°C ambient per the 33.3mW/°C thermal coefficient.
Does the MAX20003ATPB/V+TC2 support adjustable output voltage?
Yes, the MAX20003ATPB/V+TC2 supports output voltages from 1V to 10V using an external resistive divider connected between OUT and FB. The FB pin has a precise 1.00V ±1% reference (0.99–1.01V), enabling accurate regulation. For fixed outputs, connect FB directly to BIAS to select 5V or 3.3V.
How does the MAX20003ATPB/V+TC2 handle automotive cold-crank conditions?
The MAX20003ATPB/V+TC2 operates down to 3.5V input and supports up to 99% duty cycle, allowing it to maintain regulation during cold-crank events where battery voltage drops below 6V. Its dual-supply architecture (SUP and SUPSW) and internal bias switchover ensure stable operation even when input falls below the output voltage.
Is the MAX20003ATPB/V+TC2 qualified for automotive use?
Yes, the MAX20003ATPB/V+TC2 is AEC-Q100 qualified for Grade 1 (-40°C to +125°C), includes 42V load-dump protection, and is designed for automotive power rails. It meets ISO 7637-2 transient immunity requirements and features thermal shutdown with hysteresis for under-hood reliability.
Can the MAX20003ATPB/V+TC2 be synchronized to an external clock?
Yes, the MAX20003ATPB/V+TC2 supports external synchronization via the FSYNC pin. When driven with a logic-level clock (1.8–2.6MHz for 2.2MHz internal setting), it locks within two cycles. External clock frequencies may deviate up to ±20% from the internal oscillator; outside this range, factory consultation is recommended.
MAX20003ATPB/V+TC2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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
- Supplier Device Package:
- 20-TQFN (5x5)
MAX20003ATPB/V+TC2 FAQ
1.How can I place an order for MAX20003ATPB/V+TC2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20003ATPB/V+TC2 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 MAX20003ATPB/V+TC2 reliable?
The price and inventory of MAX20003ATPB/V+TC2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20003ATPB/V+TC2 is usually 5 days.
3.What payment methods are accepted for MAX20003ATPB/V+TC2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20003ATPB/V+TC2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20003ATPB/V+TC2?
MAX20003ATPB/V+TC2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20003ATPB/V+TC2 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 MAX20003ATPB/V+TC2?
For technical support, including MAX20003ATPB/V+TC2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20003ATPB/V+TC2 requirements.
6.How does Aetrix verify that MAX20003ATPB/V+TC2 is sourced from the original manufacturer or authorized distributors?
All MAX20003ATPB/V+TC2 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 MAX20003ATPB/V+TC2 meets industry standards.
7.What is the process for return or replacement of MAX20003ATPB/V+TC2?
All MAX20003ATPB/V+TC2 units undergo pre-shipment inspection (PSI). If there is an issue with MAX20003ATPB/V+TC2, 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 MAX20003ATPB/V+TC2 part is unused and in its original packaging.
Return procedure for MAX20003ATPB/V+TC2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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