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Analog Devices Inc./Maxim Integrated MAX20031BATME/V+T
- Part No.:
- MAX20031BATME/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX20031BATME/V+T.pdf
- Description:
- IC REG BUCK-BOOST
- Quantity:
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Product details
Overview
MAX20031BATME/V+T from Maxim Integrated is an automotive-grade dual synchronous step-down controller with integrated preboost circuit and high-voltage 200mA LDO. It delivers regulated 5V and 3.3V outputs from 2V–42V input, supports 180° out-of-phase operation at up to 2.2MHz, and maintains regulation during cold-crank down to 2V battery. It is designed for instrument clusters and head units requiring ultra-low quiescent current (17µA with 3.3V buck enabled) and EMI-sensitive environments.
For engineers reviewing the MAX20031BATME/V+T datasheet, MAX20031BATME/V+T pinout, MAX20031BATME/V+T application, or MAX20031BATME/V+T equivalent, key selection criteria include its 2.2MHz resistor-programmable switching frequency, spread-spectrum EMI reduction, crank-ready preboost architecture, thermally enhanced 48-pin TQFN package, and -40°C to +125°C automotive qualification.
Technical Context
The MAX20031BATME/V+T implements three independent current-mode controllers: two 2.2MHz synchronous buck channels operating 180° out of phase to reduce input ripple, and a dedicated synchronous boost controller activated below ~6V input to sustain VOUT1/VOUT2 regulation. Its preboost enables stable 5V/3.3V outputs even at 2V battery - critical for automotive cold-crank.
Control features include resistor-programmable frequency (220kHz–2.2MHz), selectable forced-PWM/skip mode, external synchronization (FSYNC), and pin-enabled spread spectrum. The integrated 200mA HV LDO (adjustable 1.5V–10V or factory-set 3.3V/5V) is powered from INLDO and provides low-noise bias for downstream circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V–42V normal operation; extends to 2V with preboost enabled - ensures uninterrupted power during automotive cold-crank. |
| Quiescent Current | 17µA with 3.3V buck enabled - enables always-on functionality in low-power automotive modules. |
| Switching Frequency | 220kHz–2.2MHz, resistor-programmable - allows optimization for size (high-freq) or efficiency (low-freq) without AM band interference. |
| Buck Output Accuracy | ±1.5% over temp/voltage/load - guarantees tight regulation for sensitive microcontrollers and displays. |
| Thermal Rating | -40°C to +125°C ambient, 150°C junction - qualified for under-hood and dashboard mounting locations. |
| LDO Output | 5V or 3.3V fixed (factory option), ±2% accuracy, 200mA max - powers CAN transceivers, sensors, or MCU peripherals with low dropout (500mV @ 200mA). |
| EMI Reduction | Pin-selectable spread spectrum (±6% modulation) and 50ns min on-time - suppresses peak emissions while maintaining skip-free operation at 2.2MHz. |
Pinout & Package
Package: 48-pin thermally enhanced TQFN (7mm × 7mm, exposed pad), RoHS-compliant, θJA = 23.3°C/W on 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Main supply input | Accepts 3.5V–42V; connects to preboost output to feed both buck controllers - must be heavily bypassed for high di/dt switching currents. |
| FB1 / FB2 | Buck feedback inputs | Regulate to 1.00V (typ); enable fixed 5V/3.3V outputs (via BIAS tie) or adjustable 1V–10V via resistor divider - sets output voltage precision and stability. |
| EN1 / EN2 / EN3 / EN4 | Independent enable inputs | Active-high, HV-tolerant (up to 42V); allow sequenced startup and fault-isolated shutdown of each regulator channel. |
| LX1 / LX2 / LX3 | Switch-node connections | Drive external high-side MOSFET gates; require low-ESR ceramic caps to BSTx pins and proper layout to minimize ringing and EMI. |
| PGOOD1 / PGOOD2 | Open-drain power-good indicators | Assert low during soft-start, undervoltage, or fault; require external pull-up to BIAS - used for system reset sequencing and health monitoring. |
| FSYNC / FOSC / SPS | Frequency control pins | FSYNC accepts external clock (1.8–2.6MHz); FOSC sets frequency via resistor (220kΩ → 2.2MHz); SPS enables/disables spread spectrum - enables precise EMI and timing coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2.2MHz buck + sync boost + HV LDO integration | Reduces bill-of-materials by consolidating four power rails into one IC - eliminates discrete boost stage and separate LDO in front-end designs. |
| 2V cold-crank operation with preboost | Maintains 5V/3.3V regulation when battery dips to 2V - meets OEM requirements for engine start-stop and cranking scenarios without brownout. |
| 17µA IQ with 3.3V buck active | Enables <100µA system standby current when paired with low-IQ MCUs - extends battery life in always-on telematics and ADAS modules. |
| 180° interleaved buck phase shift | Cuts input capacitor RMS current by ~30% vs. in-phase operation - allows smaller, lower-cost bulk capacitors and reduces PCB footprint. |
| Pin-selectable spread spectrum | Reduces peak radiated emissions by >10dB without altering layout or component selection - simplifies EMC certification for infotainment systems. |
| Thermally optimized 48-pin TQFN | θJC = 1°C/W enables >3W continuous dissipation at +70°C ambient - supports high-current (>3A per buck) operation without heatsinks in compact enclosures. |
Applications
| Instrument Cluster Power | Navigation Head Unit |
|---|---|
Use Scenario: Powering TFT display, graphics processor, and touch controller in digital instrument clusters with strict cold-crank and EMI requirements. IC Role / Device Role: Primary front-end power manager delivering 5V (MCU core), 3.3V (interface/peripherals), and 3.3V/5V LDO output (CAN, sensors). Use Value: Preboost sustains display backlight and MCU operation during 2V cranking; 2.2MHz switching enables compact 2.2µH inductors and avoids AM band interference. |
Use Scenario: Supplying multi-rail power to infotainment SoC, audio codec, GPS receiver, and cellular modem in automotive navigation systems. IC Role / Device Role: Central quad-output regulator providing isolated, sequenced, and monitored 5V/3.3V/3.3V/5V rails with EMI suppression. Use Value: Spread spectrum and interleaving meet CISPR 25 Class 5 radiated emissions limits; independent EN pins support dynamic rail enabling for power-state transitions. |
| Distributed DC Power System | Radio Head Unit |
Use Scenario: Centralized power conversion for zone-based vehicle architectures where multiple ECUs draw from shared 12V bus with wide transient range. IC Role / Device Role: High-efficiency, high-reliability front-end controller feeding secondary point-of-load regulators across chassis domains. Use Value: 42V absolute max input withstands load-dump transients; thermal shutdown and cycle-by-cycle current limit protect against short-circuit faults in distributed harnesses. |
Use Scenario: Powering FM/AM/DAB tuner, Bluetooth/Wi-Fi module, and amplifier in premium automotive radio head units. IC Role / Device Role: Low-noise, low-EMI power source for RF-sensitive analog sections and digital baseband processors. Use Value: Ultra-low 17µA IQ preserves battery during sleep; LDO output supplies noise-sensitive RF ICs with PSRR >65dB at 100Hz - minimizing carrier leakage and adjacent-channel interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail automotive power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20030BATME/V+T | Same pinout and feature set but lacks EN3 active-low threshold option; fixed EN3 logic-high enable only. | Preferred where simpler boost enable logic suffices and no hardware-controlled crank detection is needed. | Select MAX20030BATME/V+T if preboost activation is software-managed or synchronized with system MCU wake-up. |
| MPQ4333-AEC1 | Dual 3.5A buck only (no preboost or LDO); 2.2MHz fixed frequency; no spread spectrum or FSYNC. | Suitable for non-cold-crank applications with stable 6V–36V input; requires external boost for sub-6V operation. | Choose MPQ4333-AEC1 only when cold-crank resilience is not required and board space permits discrete boost + LDO solution. |
Compared with MAX20030BATME/V+T and MPQ4333-AEC1, the MAX20031BATME/V+T uniquely integrates crank-ready preboost, programmable LDO, and EMI-suppressing spread spectrum in a single AEC-Q100 qualified package - eliminating design compromises between cold-crank robustness, EMI compliance, and BOM count.
Availability
MAX20031BATME/V+T is available at Aetrix Electronics and suitable for instrument cluster, navigation head unit, and distributed DC power systems requiring stable component supply across automotive production lifecycles.
Supply support for MAX20031BATME/V+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 high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets, emphasizing reliability, integration, and power efficiency.
The MAX20031 belongs to Maxim's automotive front-end power management product line, engineered specifically for crank-ready, EMI-robust, multi-rail power delivery in modern vehicle infotainment and digital cockpit systems.
FAQ
What is the minimum input voltage supported by the MAX20031BATME/V+T during cold-crank?
The MAX20031BATME/V+T supports operation down to 2V input when the preboost controller is enabled - a critical capability for maintaining regulation during automotive cold-crank events. This is achieved through its integrated synchronous boost circuit that activates automatically below ~6V input, sustaining the 5V and 3.3V buck outputs. The MAX20031BATME/V+T datasheet confirms this 2V minimum under "Supply Voltage Range" with preboost enabled.
Does the MAX20031BATME/V+T support external frequency synchronization?
Yes, the MAX20031BATME/V+T supports external clock synchronization via the FSYNC pin, accepting input frequencies from 250kHz to 2.6MHz depending on RFOSC setting. This allows precise alignment of switching edges with system clocks or other converters to avoid beat frequencies and simplify EMI filtering. The MAX20031BATME/V+T also supports forced fixed-frequency PWM, skip mode, and spread-spectrum operation - all selectable via pin configuration.
What is the output voltage accuracy of the integrated LDO in the MAX20031BATME/V+T?
The high-voltage LDO in the MAX20031BATME/V+T delivers ±2% output voltage accuracy over temperature, line, and load for both factory-configured 5V and 3.3V options. At 200mA load, dropout is 500mV (max), and PSRR exceeds 65dB at 100Hz. The LDO is enabled via EN4 and powered from INLDO, supporting input voltages from 3.5V to 36V - making it suitable for powering noise-sensitive analog and RF circuitry directly from the main battery rail.
How does the MAX20031BATME/V+T reduce electromagnetic interference?
The MAX20031BATME/V+T reduces EMI through three integrated methods: (1) pin-selectable spread-spectrum modulation (±6% frequency deviation), (2) 180° interleaved buck operation to cancel input ripple, and (3) 50ns minimum on-time guaranteeing skip-free PWM at 2.2MHz. These features collectively suppress peak radiated emissions without requiring additional shielding or complex filter design - a key advantage for passing CISPR 25 Class 5 in automotive infotainment systems using the MAX20031BATME/V+T.
Is the MAX20031BATME/V+T pin-compatible with other devices in the MAX20030/MAX20031 family?
Yes, the MAX20031BATME/V+T is pin-compatible with all variants in the MAX20030/MAX20031 family, including MAX20030BATME/V+T and MAX20031BATMI/V+, sharing the identical 48-pin TQFN package, pinout, and footprint. Differences lie in internal configuration - such as EN3 threshold (active-low in MAX20031, active-high in MAX20030) and factory-set LDO voltage (3.3V or 5V). This allows drop-in replacement for qualification reuse and design flexibility across vehicle platforms using the MAX20031BATME/V+T.
MAX20031BATME/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX20031BATME/V+T FAQ
1.How can I place an order for MAX20031BATME/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20031BATME/V+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 MAX20031BATME/V+T reliable?
The price and inventory of MAX20031BATME/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20031BATME/V+T is usually 5 days.
3.What payment methods are accepted for MAX20031BATME/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20031BATME/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20031BATME/V+T?
MAX20031BATME/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20031BATME/V+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 MAX20031BATME/V+T?
For technical support, including MAX20031BATME/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20031BATME/V+T requirements.
6.How does Aetrix verify that MAX20031BATME/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20031BATME/V+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 MAX20031BATME/V+T meets industry standards.
7.What is the process for return or replacement of MAX20031BATME/V+T?
All MAX20031BATME/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20031BATME/V+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 MAX20031BATME/V+T part is unused and in its original packaging.
Return procedure for MAX20031BATME/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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