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Analog Devices Inc./Maxim Integrated MAX20031BATMD/V+
- Part No.:
- MAX20031BATMD/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX20031BATMD/V+.pdf
- Description:
- IC REG BUCK-BOOST
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Product details
Overview
MAX20031BATMD/V+ from Maxim Integrated is an automotive-grade dual synchronous step-down controller with integrated preboost converter and high-voltage 200mA LDO, designed for front-end power management in cold-crank–capable systems. It delivers regulated 5V and 3.3V outputs (±1% FB accuracy), operates from 2V–42V input (with preboost), supports 2.2MHz switching, and achieves 17µA quiescent current with 3.3V buck enabled - ideal for instrument clusters and head units requiring crank-ready operation.
For engineers reviewing the MAX20031BATMD/V+ datasheet, MAX20031BATMD/V+ pinout, MAX20031BATMD/V+ application, or MAX20031BATMD/V+ equivalent, key selection criteria include its 180° out-of-phase dual-buck architecture, resistor-programmable 220kHz–2.2MHz frequency, spread-spectrum EMI reduction, thermal shutdown at 170°C, and 48-pin TQFN package with exposed pad for automotive-grade thermal performance.
Technical Context
The MAX20031BATMD/V+ implements three independent current-mode controllers: two synchronous buck channels operating 180° out of phase to reduce input ripple, and a dedicated synchronous boost (preboost) channel enabling regulation down to 2V input. Its control logic supports forced PWM, skip mode, and external synchronization via FSYNC, with programmable dead time (20ns) and minimum on-time (50ns for buck, 40ns for boost).
It integrates a high-voltage 200mA LDO (VINLDO = 3.5V–36V) with 5V/3.3V factory-selectable output, ±1% load/line regulation, and 250mV dropout at 200mA. All controllers share a common BIAS rail (5V ±10%) and support independent enable inputs (EN1–EN4), power-good monitoring (PGOOD1/2), and overvoltage/undervoltage lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V–42V normal operation; extends to 2V with preboost enabled - ensures continuous regulation during automotive cold-crank events. |
| Quiescent Current | 17µA with 3.3V buck enabled - enables always-on functionality without battery drain in parked vehicles. |
| Switching Frequency | 220kHz–2.2MHz, resistor-programmable via FOSC pin - allows optimization for size (high-freq) or efficiency (low-freq) and avoids AM band interference. |
| Output Accuracy | ±1% for VOUT1 (5V) and VOUT2 (3.3V); ±0.5% for LDO VOUT4 - guarantees stable MCU and display supply under temperature and load variation. |
| Thermal Protection | Thermal shutdown at 170°C with 20°C hysteresis - prevents damage during sustained overload or poor heatsinking in engine bay environments. |
| Package | 48-pin TQFN (7mm × 7mm, exposed pad) - provides low θJA (23.3°C/W) for high-power density in space-constrained automotive modules. |
| Operating Temperature | –40°C to +125°C ambient - qualified for under-hood and dashboard applications per AEC-Q100 Grade 0 requirements. |
Pinout & Package
MAX20031BATMD/V+ is housed in a thermally enhanced 48-pin TQFN package (7mm × 7mm, outline 21-0144) with exposed pad (EP = GND). The package supports high-current routing and efficient heat dissipation in automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Main power input (to buck controllers) | Accepts up to 42V; requires local bulk capacitance to sustain dual 2.2MHz switching currents. |
| INLDO | LDO input supply | 3.5V–36V input; must be decoupled with 4.7µF ceramic capacitor for stability. |
| OUT1 / OUT2 | Buck output sense & current-sense return | Provides feedback path and negative CS node; connects directly to output filter capacitor ground. |
| FB1 / FB2 / FB4 | Voltage feedback inputs | Regulate to 1.00V (buck) or 1.25V (LDO); enable precise output setting via resistive dividers. |
| DL1/DL2/DL3 | Low-side gate drivers | Drive n-channel MOSFET sources; swing from PGND to BIAS (5V) - require Kelvin routing for current sensing. |
| DH1/DH2/DH3 | High-side gate drivers | Drive n-channel MOSFET gates; referenced to LXx/BSTx - demand tight layout to minimize shoot-through risk. |
| PGOOD1 / PGOOD2 | Open-drain power-good indicators | Assert low during soft-start or fault; require external pull-up to BIAS for logic-level signaling. |
| EN1–EN4 | Independent active-high enable inputs | Allow sequenced startup and dynamic power gating of each regulator channel. |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase dual buck controllers | Reduces input capacitor RMS current by ~30% vs. in-phase operation - lowers required bulk capacitance and board area. |
| Integrated preboost (synchronous step-up) | Enables regulation at VIN as low as 2V - eliminates need for external boost stage in cold-crank–compliant designs. |
| Resistor-programmable switching frequency | 220kHz–2.2MHz range via single FOSC resistor - simplifies EMI tuning without firmware or component changes. |
| Pin-selectable spread spectrum (SPS) | ±6% frequency modulation reduces peak EMI by >10dB - meets CISPR 25 Class 5 without added shielding. |
| Thermally optimized 48-pin TQFN | θJC = 1°C/W and exposed pad - enables >3W continuous power dissipation at +70°C ambient without heatsink. |
| Automotive-grade protection suite | Cycle-by-cycle current limit, thermal shutdown, UVLO/OVLO, and short-circuit detection - ensures robustness in harsh vehicle environments. |
Applications
| Instrument Cluster Power Supply | Navigation Head Unit Front-End |
|---|---|
Use Scenario: Powering digital gauges, TFT displays, and microcontrollers in automotive instrument panels subject to cold-crank (2V battery) and load dump transients. IC Role / Device Role / Timing Role: Primary front-end PMIC delivering isolated 5V (MCU), 3.3V (display interface), and 5V/3.3V LDO (always-on logic) with coordinated sequencing. Use Value: Preboost maintains regulation during cranking; 17µA IQ preserves battery life in sleep mode; PGOOD signals enable safe MCU reset sequencing. |
Use Scenario: Supplying SoC, audio codec, GPS receiver, and touch controller in infotainment head units with wide input voltage tolerance. IC Role / Device Role / Timing Role: Dual-buck + LDO + preboost system managing multiple voltage domains while rejecting AM-band noise from switching. Use Value: 2.2MHz operation minimizes inductor size; spread spectrum suppresses EMI near sensitive RF receivers; EN1–EN4 allow dynamic power domain control. |
| Distributed DC Power System | Engine Control Module Auxiliary Supply |
Use Scenario: Centralized power generation for multiple ECUs in zonal architectures, where compact, high-efficiency conversion is critical. IC Role / Device Role / Timing Role: High-density front-end regulator feeding downstream point-of-load converters with tightly regulated intermediate rails. Use Value: 48-pin TQFN footprint saves >40% board area vs. discrete solutions; 97% max duty cycle supports wide VIN range without dropout. |
Use Scenario: Providing auxiliary 3.3V/5V rails for sensors, CAN transceivers, and watchdog circuits in engine bay modules exposed to extreme temperatures. IC Role / Device Role / Timing Role: Crank-ready auxiliary supply ensuring continuous operation during start-stop cycles and transient brownouts. Use Value: –40°C to +125°C rating and thermal shutdown protect against under-hood thermal stress; 2V min VIN enables reliable restart after deep discharge. |
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 |
|---|---|---|---|
| MAX20030BATMD/V+ | Same pinout and package; differs only in EN3 threshold (0.95V vs. 1.8V logic-high for MAX20031) and internal LDO feedback voltage (1.25V vs. 1.275V). | Compatible in all hardware designs; software/firmware may require EN3 logic-level adjustment if using active-high boost enable. | Select MAX20030BATMD/V+ when active-low EN3 control with precision 0.95V threshold is required for hardware-based crank detection. |
| MPQ4332GQ-AEC1-P | Single 2.2MHz buck (not dual), no preboost or integrated LDO; requires external boost for cold-crank; 32-pin QFN. | Lacks integrated preboost and LDO - necessitates additional ICs for same functionality, increasing BOM count and layout complexity. | Choose MPQ4332GQ-AEC1-P only for cost-sensitive, single-rail applications where preboost and LDO are implemented externally. |
Compared with MAX20030BATMD/V+, the MAX20031BATMD/V+ offers higher EN3 logic-high threshold (1.8V) for noise-immune boost enable, while both share identical dual-buck, preboost, and LDO functionality. Against MPQ4332GQ-AEC1-P, MAX20031BATMD/V+ delivers full front-end integration - reducing component count, PCB area, and qualification effort for automotive systems.
Availability
MAX20031BATMD/V+ 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 MAX20031BATMD/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 high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets, emphasizing reliability, integration, and power efficiency.
The MAX20031BATMD/V+ belongs to Maxim's automotive front-end power management product line, engineered specifically to replace discrete multi-IC power trees in crank-ready, EMI-sensitive vehicle subsystems - delivering complete quad-output regulation in a single AEC-Q100–qualified package.
FAQ
What is the minimum input voltage supported by MAX20031BATMD/V+ during cold-crank conditions?
The MAX20031BATMD/V+ supports operation down to 2V input when the integrated preboost controller is enabled. This capability ensures uninterrupted regulation of the 5V and 3.3V buck outputs during automotive cold-crank events, where battery voltage can dip below 6V. The preboost circuit activates automatically when IN falls below the threshold set by the TERM resistor divider, maintaining stable VOUT1 and VOUT2 without external intervention.
Does MAX20031BATMD/V+ support external clock synchronization, and what is its frequency range?
Yes, MAX20031BATMD/V+ supports external clock synchronization via the FSYNC pin. It accepts sync frequencies from 250kHz to 2.6MHz depending on the FOSC resistor value - 1.8MHz–2.6MHz with RFOSC = 12kΩ, or 250kHz–550kHz with RFOSC = 70kΩ. Synchronization ensures deterministic switching timing across multiple converters, reducing beat frequencies and aiding EMI compliance in multi-rail systems.
How does the spread-spectrum feature of MAX20031BATMD/V+ reduce EMI?
The MAX20031BATMD/V+ uses pin-controlled spread-spectrum modulation (enabled via SPS pin) to dither the switching frequency by ±6%. This spreads energy across a wider bandwidth, lowering peak radiated emissions by up to 10dB - helping meet stringent CISPR 25 Class 5 limits without adding ferrites or metal shielding. The feature is hardware-configurable and requires no firmware overhead.
What is the thermal performance of MAX20031BATMD/V+ in a standard 4-layer PCB layout?
On a standard 4-layer board per JEDEC JESD51-7, MAX20031BATMD/V+ achieves a junction-to-ambient thermal resistance (θJA) of 23.3°C/W and junction-to-case (θJC) of 1°C/W. With its exposed pad soldered to a solid ground plane, the device safely dissipates up to 2.96W at +70°C ambient before derating - sufficient for typical dual-buck operation at 2A per channel with moderate efficiency.
Can MAX20031BATMD/V+ generate both fixed and adjustable output voltages?
Yes, MAX20031BATMD/V+ supports both fixed and adjustable outputs. Buck1 (VOUT1) is factory-set to 5V (±1.5%) and Buck2 (VOUT2) to 3.3V (±1.5%) when FB1/FB2 connect to BIAS; both can be adjusted from 1V to 10V using external resistive dividers. The LDO (VOUT4) is factory-configured for either 5V or 3.3V output, with adjustable range of 1.5V–10V via FB4 divider - offering flexibility across diverse SoC and peripheral voltage requirements.
MAX20031BATMD/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Strip
- 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:
- -
MAX20031BATMD/V+ FAQ
1.How can I place an order for MAX20031BATMD/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20031BATMD/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 MAX20031BATMD/V+ reliable?
The price and inventory of MAX20031BATMD/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20031BATMD/V+ is usually 5 days.
3.What payment methods are accepted for MAX20031BATMD/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20031BATMD/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20031BATMD/V+?
MAX20031BATMD/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20031BATMD/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 MAX20031BATMD/V+?
For technical support, including MAX20031BATMD/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20031BATMD/V+ requirements.
6.How does Aetrix verify that MAX20031BATMD/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20031BATMD/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 MAX20031BATMD/V+ meets industry standards.
7.What is the process for return or replacement of MAX20031BATMD/V+?
All MAX20031BATMD/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20031BATMD/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 MAX20031BATMD/V+ part is unused and in its original packaging.
Return procedure for MAX20031BATMD/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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