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Analog Devices Inc./Maxim Integrated MAX20031BATMC/V+
- Part No.:
- MAX20031BATMC/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX20031BATMC/V+.pdf
- Description:
- IC REG LDO BUCK SMD
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Product details
Overview
MAX20031BATMC/V+ from Maxim Integrated is an automotive-grade dual synchronous step-down controller with integrated preboost circuit and high-voltage 200mA LDO, designed for front-end power management in cold-crank and stop-start automotive systems. It delivers regulated 5V and 3.3V outputs (±1% feedback accuracy), operates from 2V–42V input (with preboost), supports 2.2MHz switching, and achieves 17µA quiescent current with 3.3V buck enabled - critical for always-on instrument cluster and head unit applications.
For engineers reviewing the MAX20031BATMC/V+ datasheet, MAX20031BATMC/V+ pinout, MAX20031BATMC/V+ application, or MAX20031BATMC/V+ equivalent, key selection considerations include its 48-pin TQFN package with exposed pad, dual-phase 180° out-of-phase operation to reduce input ripple, resistor-programmable frequency (220kHz–2.2MHz), spread-spectrum EMI reduction, and integrated crank-ready preboost enabling regulation down to 2V battery input.
Technical Context
The MAX20031BATMC/V+ implements three independent current-mode controllers: two synchronous buck channels operating 180° out of phase at up to 2.2MHz, and a dedicated synchronous boost (preboost) channel with 40ns minimum on-time and 50mV current-limit threshold. All controllers share a common BIAS rail and support forced PWM, skip mode, and external synchronization via FSYNC.
Its architecture integrates protection logic including cycle-by-cycle current limiting per channel, thermal shutdown at 170°C, overvoltage/undervoltage lockout on IN and INLDO, and open-drain PGOOD monitoring for both buck outputs. The LDO section features adjustable output (1.5V–10V) or factory-set 3.3V/5V, 250mV dropout at 200mA, and ±1.25% output voltage accuracy over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2V–42V (preboost enabled); enables stable operation during automotive cold-crank down to 2V battery |
| Switching Frequency | 220kHz–2.2MHz (resistor-programmable); allows compact magnetics and avoids AM band interference |
| Buck Output Accuracy | ±1% (VFB = 1.00V ±10mV); ensures precise 5V/3.3V regulation for MCU and interface ICs |
| Quiescent Current | 17µA (3.3V buck on); meets OEM low-power requirements for always-on vehicle modules |
| LDO Output Capability | 200mA @ 5V (±1%); powers auxiliary sensors or CAN transceivers without external regulators |
| Operating Temperature | −40°C to +125°C (junction); qualified for under-hood automotive environments |
| Package Thermal Resistance | θJA = 23.3°C/W (4-layer board); supports >2.9W continuous dissipation at +70°C ambient |
Pinout & Package
MAX20031BATMC/V+ is housed in a thermally enhanced 7mm × 7mm, 48-pin TQFN package with exposed pad (EP = GND). The package supports high-power density layout with separate AGND and PGND pins per controller domain and dedicated LX/BST/DH/DL terminals for each power stage.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| IN | Main supply input | Accepts 2V–42V; connects to preboost output or direct battery; requires local bulk capacitance |
| OUT1 / OUT2 | Buck output sense & current-sense return | Provides feedback path and negative CS node; must connect to output capacitor and current-sense resistor |
| FB1 / FB2 | Buck voltage feedback inputs | Regulate to 1.00V (typ); enable fixed 5V/3.3V or adjustable 1V–10V outputs via resistor divider |
| LX1 / LX2 / LX3 | Power switch node connections | Drive external high-side MOSFETs; require low-ESR ceramic capacitors to BSTx for gate drive |
| EN1 / EN2 / EN3 / EN4 | Independent enable inputs | Active-high digital controls for buck1, buck2, preboost, and LDO; support sequencing and fault isolation |
| PGOOD1 / PGOOD2 | Open-drain power-good indicators | Assert low during soft-start, undervoltage, or fault; require external pull-up to BIAS for logic-level signaling |
| FSYNC / SPS / FOSC | Timing control inputs | Enable external clock sync (1:1 ratio), spread-spectrum modulation, or resistor-set switching frequency |
Key Features
| Feature | Design Value |
|---|---|
| Dual 180° out-of-phase buck controllers | Reduces input capacitor RMS current by ~30% vs. in-phase operation, lowering size and cost |
| Synchronous preboost (2V–36V input) | Maintains VOUT1/VOUT2 regulation during cold-crank; eliminates need for external boost IC |
| Resistor-programmable 220kHz–2.2MHz fSW | Enables optimization for efficiency (low fSW) or component size/EMI (high fSW) without firmware change |
| 50ns minimum on-time (buck) | Supports 3.3V output directly from 12V battery at 2.2MHz without skip-mode instability |
| Integrated 200mA HV LDO with 250mV dropout | Powers low-noise analog circuits or CAN PHYs; eliminates discrete LDO and reduces BOM count |
| Thermally enhanced 48-pin TQFN (7mm × 7mm) | Exposes die pad to PCB ground plane; achieves 1°C/W θJC for reliable high-current operation |
Applications
| Instrument Cluster | Navigation Head Unit |
|---|---|
Use Scenario: Powering MCU, TFT display backlight drivers, and CAN/FlexRay interfaces in digital dashboards subject to cold-crank (2V battery) and load dump (60V transients). IC Role / Device Role / Timing Role: Front-end power manager delivering isolated 5V (MCU core), 3.3V (peripherals), and 5V LDO (CAN transceiver) with coordinated sequencing and PGOOD monitoring. Use Value: Eliminates need for external preboost and discrete LDO; 17µA IQ extends battery life during vehicle sleep mode. |
Use Scenario: Supplying SoC, audio codec, GPS receiver, and touch controller in infotainment systems requiring tight voltage tolerance and low EMI near AM/FM antennas. IC Role / Device Role / Timing Role: Dual-phase buck regulator with spread-spectrum and 2.2MHz operation to minimize conducted/radiated noise in sensitive RF bands. Use Value: Resistor-programmable frequency avoids AM band (530–1710kHz); 50ns min on-time prevents subharmonic oscillation at high VIN/VOUT ratios. |
| Distributed DC Power System | ADAS Camera Module |
Use Scenario: Centralized power distribution across multiple ECUs (e.g., body control, HVAC, lighting) sharing a common 12V battery rail with wide dynamic range. IC Role / Device Role / Timing Role: High-efficiency dual-buck controller with independent enable/disable and PGOOD reporting per output for modular system-level power supervision. Use Value: 180° phase shift cuts input ripple amplitude by 50%, reducing bulk capacitor requirements and improving system-level EMC compliance. |
Use Scenario: Powering image sensor, ISP, and serializer in automotive camera modules where thermal constraints limit PCB area and airflow. IC Role / Device Role / Timing Role: Compact front-end PMIC with integrated preboost and LDO, mounted directly on camera module PCB to minimize trace inductance and noise coupling. Use Value: 7mm × 7mm TQFN with exposed pad dissipates >2.9W at +70°C ambient; supports continuous operation in sealed enclosures. |
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 |
|---|---|---|---|
| MAX20030BATMC/V+ | Same pinout, identical architecture; differs only in EN3 logic polarity (active-low vs. active-high in MAX20031) | Requires matching EN3 control signal polarity; otherwise drop-in compatible in all other functions | Select MAX20030BATMC/V+ when hardware EN3 driver is open-drain or requires active-low assertion |
| MPQ4333-AEC1 | Single 3.5A buck (no preboost, no LDO, no dual-phase); 3.5V–36V input; 2.2MHz max fSW; QFN-16 | Lacks integrated preboost and LDO; requires external components for cold-crank support and auxiliary rails | Choose MPQ4333-AEC1 only for simpler single-output designs where preboost and LDO are implemented externally |
Compared with MAX20030BATMC/V+, the MAX20031BATMC/V+ offers active-high EN3 for direct microcontroller GPIO control, while MPQ4333-AEC1 provides lower integration but smaller footprint - making MAX20031BATMC/V+ optimal for space-constrained, crank-ready multi-rail systems requiring minimal external components.
Availability
MAX20031BATMC/V+ is available at Aetrix Electronics and suitable for automotive instrument clusters, navigation head units, and distributed DC power systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX20031BATMC/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, with emphasis on power management, interface, and sensing solutions.
The MAX20031BATMC/V+ belongs to Maxim's automotive front-end power supply family, engineered specifically to replace discrete preboost + dual-buck + LDO solutions in crank-ready ADAS and infotainment systems.
FAQ
What is the minimum input voltage supported by MAX20031BATMC/V+ during cold-crank conditions?
The MAX20031BATMC/V+ supports operation down to 2V input when the integrated preboost controller is enabled. This capability ensures uninterrupted regulation of both 5V and 3.3V buck outputs during automotive cold-crank events, eliminating the need for external boost circuitry. The preboost activates automatically below ~6V input, maintaining VOUT1 and VOUT2 within specification across the full 2V–42V range.
Does MAX20031BATMC/V+ support synchronization to an external clock, and what is the acceptable frequency range?
Yes, MAX20031BATMC/V+ supports external clock synchronization via the FSYNC pin. When configured for sync mode, it accepts external clocks from 250kHz to 2.6MHz depending on the FOSC resistor value - e.g., 1.8MHz–2.6MHz with RFOSC = 12kΩ, or 250kHz–550kHz with RFOSC = 70kΩ. The device maintains 1:1 frequency ratio and requires ≥150ns minimum sync pulse width for reliable locking.
How does the spread-spectrum feature of MAX20031BATMC/V+ reduce EMI, and how is it enabled?
The MAX20031BATMC/V+ reduces peak EMI emissions by modulating the switching frequency ±6% around the nominal value using its dedicated SPS pin. Pulling SPS high enables spread-spectrum mode; pulling low disables it. This dithering spreads energy across a wider bandwidth, lowering radiated and conducted noise peaks - especially beneficial near AM radio bands - without affecting output regulation or efficiency.
What is the purpose of the TERM pin on MAX20031BATMC/V+, and how should it be used?
The TERM pin on MAX20031BATMC/V+ serves as a ground-switched reference for the preboost feedback divider. When the preboost controller is disabled, TERM opens to isolate the feedback network and prevent leakage errors. It must be connected to the bottom of the FB3 resistive divider (between FB3 and ground) and left unconnected elsewhere. Proper TERM usage ensures accurate boost output voltage setting and stable disable behavior.
Can MAX20031BATMC/V+ operate with only one buck channel enabled while the other remains off?
Yes, MAX20031BATMC/V+ supports independent channel control: EN1 enables buck1, EN2 enables buck2, and EN3 enables the preboost. Either buck channel can be disabled while the other remains active - for example, enabling only buck1 (5V) for MCU power while keeping buck2 (3.3V) off until peripheral initialization. Quiescent current scales accordingly (e.g., 17µA with only buck2 enabled), preserving system-level low-power integrity.
MAX20031BATMC/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:
- -
MAX20031BATMC/V+ FAQ
1.How can I place an order for MAX20031BATMC/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20031BATMC/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 MAX20031BATMC/V+ reliable?
The price and inventory of MAX20031BATMC/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20031BATMC/V+ is usually 5 days.
3.What payment methods are accepted for MAX20031BATMC/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20031BATMC/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20031BATMC/V+?
MAX20031BATMC/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20031BATMC/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 MAX20031BATMC/V+?
For technical support, including MAX20031BATMC/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20031BATMC/V+ requirements.
6.How does Aetrix verify that MAX20031BATMC/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20031BATMC/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 MAX20031BATMC/V+ meets industry standards.
7.What is the process for return or replacement of MAX20031BATMC/V+?
All MAX20031BATMC/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20031BATMC/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 MAX20031BATMC/V+ part is unused and in its original packaging.
Return procedure for MAX20031BATMC/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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