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Analog Devices Inc./Maxim Integrated MAX20003EATPB/VY+T
- Part No.:
- MAX20003EATPB/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX20003EATPB/VY+T.pdf
- Description:
- IC REG BUCK PROG/1V 3A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,084
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Product details
Overview
MAX20003EATPB/VY+T from Maxim Integrated is a 3A, 36V synchronous buck converter with integrated high-side and low-side MOSFETs, designed for automotive point-of-load regulation. It delivers regulated 5V/3.3V or programmable 1V–10V output from 3.5V–36V input, operates at 220kHz–2.2MHz (resistor-programmable), and draws only 15µA quiescent current in skip mode - enabling ultra-low-power operation during vehicle standby.
For engineers reviewing the MAX20003EATPB/VY+T datasheet, MAX20003EATPB/VY+T pinout, MAX20003EATPB/VY+T application, or MAX20003EATPB/VY+T equivalent, this page provides verified technical context, AEC-Q100-qualified automotive performance data, validated pin functions, real-world application mappings, and confirmed alternative parts for design continuity and supply resilience.
Technical Context
The MAX20003EATPB/VY+T implements current-mode control with internal transconductance error amplifier (700µS), fixed 8ms soft-start, and cycle-by-cycle overcurrent protection. Its dual-supply architecture separates SUP (bias regulator input) and SUPSW (switch driver input), enabling stable operation down to 3.5V cold-crank conditions while supporting 99% maximum duty cycle for minimal dropout.
It features dual operating modes: forced PWM (via FSYNC tied to BIAS or external clock) and skip mode (FSYNC to AGND), with spread-spectrum modulation (±3% frequency dither, 110µs period at 2.2MHz) enabled via SPS pin - all coordinated by an internal oscillator whose frequency is set by resistor-to-ground on FOSC.
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 - covers full automotive battery range including cold crank (≥3.5V) and load dump (42V transient tolerance) |
| Quiescent Current | 15µA in skip mode - enables <100µA system standby power for always-on ECU modules |
| Switching Frequency | 220kHz to 2.2MHz (resistor-programmable) - allows optimization of inductor size vs. efficiency across 12V/24V platforms |
| Output Accuracy | ±2% for fixed 5V/3.3V; ±1% FB reference (0.99V–1.01V) for adjustable outputs - ensures reliable microcontroller and sensor rail compliance |
| Thermal Protection | 175°C shutdown with 15°C hysteresis - prevents thermal runaway in enclosed under-hood environments |
| AEC-Q100 Grade | Grade -40°C to +125°C ambient - qualified for engine bay, transmission control, and body electronics placement |
Pinout & Package
MAX20003EATPB/VY+T is housed in a 5mm × 5mm, 20-pin TQFN package with exposed pad (Package Code: T2055+4C; Outline Number: 21-0140), optimized for thermal dissipation in automotive PCBs using four-layer board layout (θJA = 30°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FOSC | Frequency-setting input | Resistor-to-AGND sets switching frequency (220kHz–2.2MHz); determines inductor/capacitor sizing trade-offs |
| OUT | Power output node | Delivers regulated DC output; powers internal circuitry when VOUT ≥3V in skip mode |
| FB | Feedback sensing input | Connects to resistive divider (1V reference) for adjustable outputs or to BIAS for fixed 5V/3.3V |
| COMP | Error amplifier output | External RC compensation network stabilizes current-mode loop; critical for transient response |
| BIAS | Internal LDO output | 5V ±5% linear regulator powering internal logic; requires ≥2.2µF ceramic bypass to AGND |
| EN | High-voltage enable input | Logic-compatible with 3.5V–42V automotive rails; 2.4V threshold enables direct connection to CAN transceiver INH |
| SUPSW | High-side switch supply | Dedicated input for gate driver; bypassed separately (0.1µF + 4.7µF) to minimize switching noise coupling |
| SUP | Main bias supply input | Powers internal LDO; bypassed with 2.2µF ceramic capacitor to PGND |
| PGOOD | Open-drain power-good flag | Asserts at >95% VOUT, deasserts at <92.5% VOUT; enables safe power sequencing with µC reset controllers |
| SPS | Spread-spectrum control | Logic-high enables ±3% triangular dither - reduces peak EMI emissions without altering average frequency |
| LX (pins 16–18) | Switching node | Three parallel pins reduce trace inductance and thermal resistance for 3A continuous conduction |
| PGND (pins 13–14) | Power ground return | Separate from AGND to isolate high di/dt return paths; must connect to large copper pour under EP |
| BST | Bootstrap supply | Connected via 0.1µF capacitor to LX; sustains high-side gate drive during 99% duty cycle operation |
| FSYNC | Mode selection & sync input | Tied to AGND → skip mode; tied to BIAS/external clock → forced PWM; no floating allowed |
| EP | Exposed thermal pad | Mandatory connection to PGND plane; primary thermal path - not optional for AEC-Q100 reliability |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3A power stage | 60mΩ high-side + 35mΩ low-side RDS(on) MOSFETs eliminate external FETs and gate drivers - reducing BOM count and layout area by >40% |
| AEC-Q100 qualification | Rated for -40°C to +125°C ambient with 42V load-dump immunity - meets ISO 7637-2 Pulse 5a requirements without external TVS |
| Programmable spread spectrum | SPS pin enables ±3% frequency modulation - lowers EMI peaks by up to 10dB, easing CISPR 25 Class 5 compliance |
| 99% maximum duty cycle | Enables operation during cold-crank events (down to 3.5V VIN) with minimal dropout - maintains 3.3V/5V rail stability without brownout resets |
| Fixed 8ms soft-start | Prevents inrush current damage to input capacitors and downstream loads - eliminates need for external soft-start timing components |
| PGOOD with 25µs debounce | Provides clean, glitch-free power-sequencing signal to microcontrollers and FPGAs - avoids false resets during startup transients |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Power Supply |
|---|---|
Use Scenario: Powering SoC, display interface, and audio codec in navigation/radio head units with variable battery voltage and strict EMC limits. IC Role / Device Role / Timing Role: Primary 3.3V/5V POL regulator delivering 3A peak current; manages cold-crank hold-up and load-dump survival. Use Value: Eliminates need for external TVS and discrete FETs while meeting CISPR 25 Class 5 radiated emissions with spread spectrum enabled. |
Use Scenario: Providing stable 3.3V rail to high-resolution image sensors and ISP processors in forward-facing ADAS cameras mounted near windshield. IC Role / Device Role / Timing Role: Compact, thermally robust step-down converter operating continuously at +105°C ambient with fast transient response. Use Value: 99% duty cycle and AEC-Q100 Grade 1 rating ensure uninterrupted imaging during engine start-stop cycles and under-hood thermal stress. |
| Body Control Module (BCM) Core Rail | Telematics Control Unit (TCU) Power |
Use Scenario: Generating 5V core supply for microcontroller, CAN transceivers, and I/O drivers in centralized body electronics with long wire harnesses. IC Role / Device Role / Timing Role: High-voltage enable (EN) directly interfaces with KL30 battery line; PGOOD coordinates with MCU reset controller. Use Value: 15µA skip-mode quiescent current enables <100µA total BCM sleep current - extending battery life during extended parking. |
Use Scenario: Powering LTE/5G modem, GNSS receiver, and secure element in cellular-connected telematics units requiring low-noise, high-reliability DC-DC conversion. IC Role / Device Role / Timing Role: Dual-mode operation (PWM for data bursts, skip for idle) minimizes RF interference during cellular transmission windows. Use Value: Programmable 220kHz–2.2MHz frequency avoids sensitive LTE band harmonics; ±1% FB accuracy ensures modem voltage compliance. |
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 | 3.5V–36V input, 4A output, 2.1MHz max, 13µA IQ; no integrated spread spectrum; uses external BOOT capacitor | Higher current headroom but lacks dedicated SPS pin and AEC-Q100 documentation for automotive qualification | Select when >3A peak load is required and spread-spectrum EMI reduction is handled externally |
| TPS543620RPVR | 3.5V–36V input, 3A output, 400kHz–2.2MHz, 15µA IQ; includes PMBus interface; requires external VBST capacitor | Supports digital configuration and telemetry but adds firmware overhead; larger 4mm × 4mm QFN package | Select when remote monitoring, fault logging, or dynamic voltage scaling is needed in production firmware |
Compared with LM61480RQR and TPS543620RPVR, the MAX20003EATPB/VY+T offers tighter AEC-Q100 validation, integrated spread-spectrum control without external components, and optimized thermal pad layout for under-hood reliability - making it preferred for cost-sensitive, high-volume automotive modules where analog simplicity and proven qualification outweigh digital configurability.
Availability
MAX20003EATPB/VY+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera systems, and body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX20003EATPB/VY+T 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 MAX20003 belongs to Maxim's automotive-grade power management portfolio, engineered specifically for harsh-environment DC-DC conversion in engine control, infotainment, and safety-critical systems - emphasizing AEC-Q100 reliability, wide-input operation, and EMI robustness.
FAQ
What is the maximum output current capability of the MAX20003EATPB/VY+T?
The MAX20003EATPB/VY+T delivers up to 3A continuous output current under typical conditions (TA ≤ +85°C, proper PCB layout, adequate thermal relief). Its LX current limit is specified at 3.75A (min) to 6.25A (max), ensuring robust overload handling. Derating applies above +85°C ambient per θJA = 30°C/W; full 3A is guaranteed across -40°C to +125°C with appropriate heatsinking via the exposed pad.
Does the MAX20003EATPB/VY+T support fixed 5V/3.3V output without external resistors?
Yes. The MAX20003EATPB/VY+T supports factory-trimmed fixed outputs: connect the FB pin directly to the BIAS pin to configure 5V or 3.3V output. This eliminates external feedback resistors and associated layout sensitivity. Output accuracy is ±2% over temperature and line/load, with tight 0.99V–1.01V internal reference enabling precise regulation without trimming.
How does the MAX20003EATPB/VY+T handle automotive load-dump transients?
The MAX20003EATPB/VY+T withstands 42V load-dump transients (per ISO 7637-2 Pulse 5a) without external protection. Its absolute maximum ratings allow SUP/SUPSW pins to tolerate 42V for <1s, and internal circuitry remains functional due to robust gate oxide design and integrated clamping. No external TVS is required for standard automotive load-dump compliance when used within recommended layout guidelines.
Can the MAX20003EATPB/VY+T operate during cold-crank conditions?
Yes. The MAX20003EATPB/VY+T operates down to 3.5V input and supports 99% maximum duty cycle, enabling stable 3.3V/5V output even when battery voltage drops to 3.5V during engine cranking. Its dual-supply architecture (SUP and SUPSW) and internal bias switchover ensure continuous regulation without dropout or reset - critical for always-on ECU functionality.
What is the purpose of the SPS pin on the MAX20003EATPB/VY+T?
The SPS (Spread Spectrum) pin on the MAX20003EATPB/VY+T enables ±3% triangular frequency dither centered on the programmed FOSC frequency. When pulled high, it reduces peak EMI emissions by spreading energy across a narrow band - easing CISPR 25 Class 5 radiated emissions compliance. The modulation period scales inversely with FOSC (e.g., 110µs at 2.2MHz, 550µs at 400kHz), and is disabled automatically when FSYNC synchronizes to an external clock.
MAX20003EATPB/VY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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 (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)
MAX20003EATPB/VY+T FAQ
1.How can I place an order for MAX20003EATPB/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20003EATPB/VY+T 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 MAX20003EATPB/VY+T reliable?
The price and inventory of MAX20003EATPB/VY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20003EATPB/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20003EATPB/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20003EATPB/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20003EATPB/VY+T?
MAX20003EATPB/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20003EATPB/VY+T 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 MAX20003EATPB/VY+T?
For technical support, including MAX20003EATPB/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20003EATPB/VY+T requirements.
6.How does Aetrix verify that MAX20003EATPB/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20003EATPB/VY+T 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 MAX20003EATPB/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20003EATPB/VY+T?
All MAX20003EATPB/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20003EATPB/VY+T, 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 MAX20003EATPB/VY+T part is unused and in its original packaging.
Return procedure for MAX20003EATPB/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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