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Analog Devices Inc./Maxim Integrated MAX20031BATMC/V+T
- Part No.:
- MAX20031BATMC/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX20031BATMC/V+T.pdf
- Description:
- IC REGULATOR BUCK
- Quantity:
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Product details
Overview
MAX20031BATMC/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 2.2MHz switching, 180° phase shift between buck channels, and operates across –40°C to +125°C for instrument cluster and head-unit power systems.
For engineers reviewing the MAX20031BATMC/V+T datasheet, MAX20031BATMC/V+T pinout, MAX20031BATMC/V+T application, or MAX20031BATMC/V+T equivalent, key selection criteria include cold-crank operation down to 2V VIN, 17µA quiescent current with 3.3V buck enabled, resistor-programmable 220kHz–2.2MHz frequency, spread-spectrum EMI reduction, and thermally enhanced 48-pin TQFN package.
Technical Context
The MAX20031BATMC/V+T implements three independent current-mode controllers: two out-of-phase (180°) synchronous buck regulators (Buck1/Buck2), one synchronous boost pre-regulator (BST), and a standalone HV LDO (OUT4). Each buck channel features cycle-by-cycle current limiting, 97% max duty cycle, and 50ns minimum on-time for stable 3.3V output at 2.2MHz under cold-crank conditions.
Its architecture integrates dedicated gate drivers (DH/DL per channel), programmable feedback references (1.00V for bucks, 1.005V for boost, 1.25V for LDO), and multi-mode frequency control - including forced PWM, skip mode, and external synchronization via FSYNC - enabling optimized efficiency and EMI performance across wide load and input voltage ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2V (with preboost) to 42V - enables regulation during automotive cold-crank and load-dump events |
| Quiescent Current (IQ) | 17µA with 3.3V buck enabled - meets OEM ultra-low standby power requirements |
| Switching Frequency | 220kHz to 2.2MHz (resistor-programmable) - allows compact magnetics and avoids AM band interference |
| Buck Output Accuracy | ±1.5% over temp - ensures reliable microcontroller and display supply stability |
| Thermal Range | –40°C to +125°C ambient - qualified for under-hood automotive applications |
| LDO Output Current | 200mA (max) - powers auxiliary sensors or interface ICs without external regulators |
| EMI Reduction | Pin-selectable spread spectrum (±6%) - reduces peak radiated emissions without layout changes |
Pinout & Package
MAX20031BATMC/V+T is housed in a thermally enhanced 7mm × 7mm, 48-pin TQFN package with exposed pad (EP = GND). The package supports high-power dissipation (θJA = 23.3°C/W on 4-layer board) and automotive AEC-Q100 stress reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Main Power Input | Accepts up to 42V; supplies buck controllers after preboost stage |
| INLDO | LDO Input | 3.5V–36V input for HV LDO; requires local 4.7µF ceramic capacitor |
| OUT1 / OUT2 | Buck Output Sense | Connects to output rail for voltage feedback; also serves as negative CS node |
| FB1 / FB2 | Buck Feedback Inputs | Regulate to 1.00V (typ); enable fixed 5V/3.3V or adjustable 1V–10V outputs |
| EN1 / EN2 / EN3 / EN4 | Independent Enable Inputs | Active-high digital controls for each regulator domain (buck1/buck2/boost/LDO) |
| PGOOD1 / PGOOD2 | Open-Drain Power-Good Outputs | Assert low if output drops >8% below nominal; require external BIAS pull-up |
| FOSC | Frequency-Setting Input | Resistor-to-ground sets switching frequency from 220kHz to 2.2MHz |
| SPS | Spread-Spectrum Control | Logic-high enables ±6% frequency modulation to reduce EMI peaks |
Key Features
| Feature | Design Value |
|---|---|
| Dual 2.2MHz Buck + Sync Boost + HV LDO | Single-chip front-end power solution eliminates 3–4 discrete regulators in automotive infotainment systems |
| 2V Cold-Crank Operation | Preboost circuit maintains VOUT1/VOUT2 regulation even when battery dips to 2V - critical for start-stop systems |
| 180° Phase Shift Between Bucks | Reduces input ripple current by ~70%, allowing smaller input bulk capacitors and lower EMI |
| 50ns Minimum On-Time | Enables stable 3.3V output directly from car battery at 2.2MHz - no external post-regulation needed |
| 65µA IQ with All Controllers Active | Ultra-low system standby power supports always-on vehicle modules compliant with ISO 16750-2 |
| Thermally Optimized 48-TQFN | Exposed pad + low θJC (1°C/W) enables >2A continuous output per buck without heatsink |
Applications
| Instrument Cluster | Navigation Head Unit |
|---|---|
Use Scenario: Digital gauge cluster with TFT LCD, MCU, and CAN transceivers requiring clean, sequenced 5V/3.3V/1.8V rails. IC Role / Device Role / Timing Role: Primary front-end power controller delivering main 5V and 3.3V supplies; manages cold-crank hold-up via preboost. Use Value: Eliminates need for external boost stage and discrete LDOs - reduces BOM count by 4 components and PCB area by 25%. |
Use Scenario: In-dash navigation system with GPS, Wi-Fi, and audio codecs operating across -40°C to +105°C ambient. IC Role / Device Role / Timing Role: Dual-buck controller providing isolated 5V (processor core) and 3.3V (peripherals); LDO powers RF bias circuits. Use Value: 180° phase shift cuts input capacitor RMS current by 68%, extending capacitor lifetime in high-temp environments. |
| Distributed DC Power System | Rear Seat Entertainment |
Use Scenario: Zone-based vehicle architecture where central gateway distributes 12V to zone ECUs needing localized 5V/3.3V conversion. IC Role / Device Role / Timing Role: Local power manager per zone; preboost ensures uninterrupted operation during engine restart. Use Value: Resistor-programmable fSW allows zone-specific optimization - e.g., 1.1MHz for cost-sensitive zones, 2.2MHz for space-constrained modules. |
Use Scenario: Rear-seat tablet dock with HDMI, USB, and touch controller requiring low-noise, fast-transient 3.3V supply. IC Role / Device Role / Timing Role: Buck2 supplies 3.3V rail; spread-spectrum mode minimizes EMI coupling into video signals. Use Value: 50ns min on-time and 2.2MHz operation deliver <10mVpp output ripple - avoids visible noise on 1080p displays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20030BATMC/V+T | Same pinout and feature set; differs only in EN3 threshold (0.95V vs. MAX20031's 1.8V logic-high) | Preferred for designs requiring precision analog enable of boost stage during cold-crank | Select MAX20030 when hardware-controlled boost activation (e.g., via resistor divider on battery) is required. |
| MPQ4332GSD-AEC1-Z | Single 2.2MHz buck (not dual); no preboost or integrated LDO; 3.5V–36V input; 2A output | Suitable only for simpler single-rail systems - cannot replace full front-end functionality | Choose only if design needs only one regulated output and can implement external boost/LDO. |
Compared with MAX20030BATMC/V+T, the MAX20031BATMC/V+T offers higher EN3 logic threshold (1.8V) for direct MCU GPIO control, while MPQ4332GSD-AEC1-Z lacks preboost, dual-channel capability, and LDO integration - making it a partial rather than full functional alternative.
Availability
MAX20031BATMC/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 MAX20031BATMC/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, with deep expertise in power management and reliability engineering.
The MAX20030/MAX20031 product line was engineered specifically for automotive front-end power architectures - integrating dual buck, preboost, and HV LDO to simplify compliance with ISO 16750, AEC-Q100, and OEM cold-crank specifications.
FAQ
What is the minimum input voltage supported by MAX20031BATMC/V+T during cold-crank?
The MAX20031BATMC/V+T supports operation down to 2V input when the synchronous preboost controller is enabled. This ensures continuous regulation of both 5V (VOUT1) and 3.3V (VOUT2) outputs during severe automotive cold-crank events, as verified in the datasheet's Electrical Characteristics table under "Supply Voltage Range (with preboost enabled)".
Does MAX20031BATMC/V+T support external clock synchronization?
Yes, MAX20031BATMC/V+T supports external clock synchronization via the FSYNC pin. It accepts external clocks from 250kHz to 2.6MHz depending on RFOSC setting, enabling precise timing alignment with system master clocks or other power stages to minimize beat-frequency EMI.
What is the thermal resistance (θJA) of MAX20031BATMC/V+T on a standard PCB?
The MAX20031BATMC/V+T has a junction-to-ambient thermal resistance (θJA) of 23.3°C/W when mounted on a 4-layer JEDEC-standard board, as measured per JESD51-7. This value assumes proper use of the exposed pad (EP = GND) and recommended copper pour per Maxim's land pattern 90-0464.
Can MAX20031BATMC/V+T generate adjustable output voltages?
Yes, MAX20031BATMC/V+T supports adjustable outputs: Buck1/Buck2 accept resistor dividers on FB1/FB2 for 1V–10V range (regulated to 1.00V); the LDO (OUT4) uses FB4 divider for 1.5V–10V; and the preboost output is set via FB3/TERM divider for custom intermediate rails.
How does the spread-spectrum feature reduce EMI in MAX20031BATMC/V+T?
The MAX20031BATMC/V+T's spread-spectrum function modulates the switching frequency by ±6% around the nominal value set by FOSC, distributing energy across a wider bandwidth. This lowers peak radiated emissions by up to 10dB compared to fixed-frequency operation - critical for passing CISPR 25 Class 5 automotive EMC tests.
MAX20031BATMC/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:
- -
MAX20031BATMC/V+T FAQ
1.How can I place an order for MAX20031BATMC/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20031BATMC/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 MAX20031BATMC/V+T reliable?
The price and inventory of MAX20031BATMC/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 MAX20031BATMC/V+T is usually 5 days.
3.What payment methods are accepted for MAX20031BATMC/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20031BATMC/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20031BATMC/V+T?
MAX20031BATMC/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20031BATMC/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 MAX20031BATMC/V+T?
For technical support, including MAX20031BATMC/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20031BATMC/V+T requirements.
6.How does Aetrix verify that MAX20031BATMC/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20031BATMC/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 MAX20031BATMC/V+T meets industry standards.
7.What is the process for return or replacement of MAX20031BATMC/V+T?
All MAX20031BATMC/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20031BATMC/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 MAX20031BATMC/V+T part is unused and in its original packaging.
Return procedure for MAX20031BATMC/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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