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Analog Devices Inc./Maxim Integrated MAX20031BATMA/V+T
- Part No.:
- MAX20031BATMA/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX20031BATMA/V+T.pdf
- Description:
- IC REG LDO BUCK SMD
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Product details
Overview
MAX20031BATMA/V+T 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–capable systems. It delivers regulated 5V (Buck 1) and 3.3V (Buck 2) outputs, supports input voltage down to 2V via preboost, operates up to 2.2MHz, and features 17µA quiescent current with Buck 1 enabled - enabling crank-ready instrument cluster and head-unit power supplies.
For engineers reviewing the MAX20031BATMA/V+T datasheet, MAX20031BATMA/V+T pinout, MAX20031BATMA/V+T application, or MAX20031BATMA/V+T equivalent, key selection criteria include its 48-pin TQFN package, resistor-programmable switching frequency (220kHz–2.2MHz), spread-spectrum EMI reduction, phase-shifted dual-buck architecture, and integrated preboost enabling regulation during 2V battery dips - all validated for -40°C to +125°C automotive operation.
Technical Context
The MAX20031BATMA/V+T implements three independent current-mode controllers: two 180° out-of-phase synchronous buck controllers (Buck 1/2) and one synchronous boost controller (preboost), plus a standalone HV LDO. Its control logic enables forced PWM, skip mode, and external synchronization via FSYNC, while COMP1/COMP2/COMP3 pins support full loop compensation for each regulator channel.
It integrates thermally optimized gate drivers (DH/DL pairs with <6Ω pull-up/pull-down resistance), precision feedback references (1.00V ±1% for Buck 1/2, 1.005V for boost, 1.25V for LDO), and robust protection including cycle-by-cycle current limiting, thermal shutdown at 170°C, and overvoltage/undervoltage lockout - all meeting stringent AEC-Q100 requirements for automotive front-end power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V–42V normal operation; extends to 2V with preboost enabled - ensures uninterrupted regulation during automotive cold-crank events. |
| Quiescent Current (IQ) | 17µA with 3.3V Buck on; 65µA with all controllers active - enables always-on functionality without excessive battery drain. |
| Switching Frequency | Resistor-programmable 220kHz–2.2MHz; ±6% spread spectrum available - avoids AM band interference and allows compact magnetics. |
| Output Accuracy | Buck 1: ±1.5% (5V); Buck 2: ±1.5% (3.3V); Boost FB: 1.005V ±0.5%; LDO FB: 1.25V ±2% - guarantees stable rail generation across temperature and load. |
| Thermal Performance | θJA = 23.3°C/W on 4-layer board; exposed pad tied to PGND - supports >2A per buck channel in automotive under-hood environments. |
| Protection Features | Cycle-by-cycle current limit, thermal shutdown (170°C), UVLO/OVLO, PGOOD monitoring, short-circuit protection - ensures system-level reliability in harsh automotive conditions. |
Pinout & Package
Package: 48-pin TQFN (7mm × 7mm, exposed pad), RoHS-compliant, thermally enhanced for automotive under-hood use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DL1, DL2, DL3 | Low-side gate-driver outputs | Drive n-channel MOSFET sources; swing from respective PGND to BIAS - enable efficient synchronous rectification in all three controllers. |
| DH1, DH2, DH3 | High-side gate-driver outputs | Drive n-channel MOSFET gates; swing from LX to BST - support bootstrap-based high-side drive with <3Ω pulldown resistance for fast turn-off. |
| FB1, FB2, FB3, FB4 | Feedback inputs | Regulate to precise internal references (1.00V, 1.005V, 1.25V); tolerate ≤1µA leakage - enable accurate output voltage setting with external dividers or direct BIAS connection. |
| EN1, EN2, EN3, EN4 | Independent enable inputs | Active-high digital controls (1.8V logic threshold); EN3 supports precision active-low crank detection - allow granular power sequencing and cold-crank–specific boost activation. |
| PGOOD1, PGOOD2 | Open-drain power-good indicators | Assert low during soft-start, undervoltage, or fault; 95% rising threshold - provide reliable system-level power sequencing and fault reporting. |
Key Features
| Feature | Design Value |
|---|---|
| Preboost controller | Enables regulation down to 2V VIN - eliminates need for external boost stage in cold-crank–critical applications like instrument clusters. |
| Phase-shifted dual-buck topology | 180° interleaving reduces input/output ripple and EMI - simplifies filtering and improves efficiency vs. single-phase designs. |
| Spread-spectrum modulation (SPS) | ±6% frequency dithering - lowers peak EMI by >10dB without compromising transient response or layout changes. |
| Ultra-low IQ modes | 17µA (3.3V Buck only), 65µA (all controllers) - meets OEM standby power budgets for always-on automotive modules. |
| Integrated 200mA HV LDO | Programmable 3.3V/5V output; 500mV dropout at 200mA - powers microcontrollers, CAN transceivers, or sensors directly from main rail. |
Applications
| Instrument Cluster Power | Navigation Head Unit |
|---|---|
Use Scenario: Powering MCU, display driver, and CAN interface in vehicle instrument clusters during engine start-stop and cold-crank. IC Role / Device Role / Timing Role: Primary front-end power controller delivering regulated 5V and 3.3V rails with preboost maintaining output during 2V battery dips. Use Value: Eliminates external boost converter; 17µA IQ extends battery life in parked state; 180° interleaving minimizes EMI near sensitive analog gauges. | Use Scenario: Supplying processor core, memory, audio codec, and GPS module in infotainment head units with wide input voltage tolerance. IC Role / Device Role / Timing Role: Dual-buck + LDO power manager providing isolated, low-noise 5V/3.3V/1.2V-equivalent rails with synchronized switching. Use Value: Resistor-programmable 2.2MHz operation enables small 2.2µH inductors; spread spectrum prevents AM radio interference in cabin audio systems. |
| Distributed DC Power System | ADAS Camera Module Power |
Use Scenario: Centralized power distribution across multiple ECUs in zonal architectures with shared 12V battery input. IC Role / Device Role / Timing Role: Front-end regulator feeding downstream point-of-load converters; preboost ensures continuity during load-dump transients. Use Value: 42V absolute max input withstands ISO 7637-2 pulse 5a; PGOOD1/PGOOD2 enable coordinated system reset and wake-up sequencing. | Use Scenario: Powering image sensor, ISP, and serializer in automotive camera modules requiring ultra-low noise and fast transient response. IC Role / Device Role / Timing Role: High-efficiency dual-buck controller supplying clean 3.3V (sensor) and 1.8V (ISP) via LDO post-regulation. Use Value: 50ns minimum on-time ensures stable 3.3V output at 2.2MHz; <20ns dead time minimizes shoot-through risk in high-frequency switching. |
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 |
|---|---|---|---|
| MAX20030BATMA/V+T | Same pinout and feature set; differs only in EN3 threshold (0.95V vs. MAX20031's 1.8V logic-high) - requires different crank-detection circuitry. | Optimized for active-low hardware-controlled preboost activation; less suitable for standard logic-enable systems. | Select when cold-crank detection must be implemented via precision analog threshold rather than digital enable signal. |
| MPQ4332GQ-AEC1 | Single 2.2MHz dual-buck IC (no preboost or LDO); 3.5V–36V input; 500mA LDO separate - lacks integrated cold-crank capability and requires external boost for sub-3.5V operation. | Targeted at mid-power ADAS domains where cold-crank is managed upstream; not suitable for standalone front-end replacement. | Choose only if preboost is handled externally and system already includes a dedicated HV LDO. |
Compared with MAX20030BATMA/V+T, the MAX20031BATMA/V+T offers standardized 1.8V logic-compatible EN3 enabling simpler microcontroller interfacing, while MPQ4332GQ-AEC1 provides lower integration but higher per-buck current rating - making MAX20031BATMA/V+T optimal for compact, crank-ready front-end designs requiring minimal external components.
Availability
MAX20031BATMA/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 MAX20031BATMA/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 emphasis on power management, interface, and sensing solutions.
The MAX20030/MAX20031 product line delivers complete front-end power supplies for automotive ECUs - integrating dual buck, preboost, and HV LDO to replace discrete power trees while meeting AEC-Q100 Grade 0/1 requirements.
FAQ
What is the minimum input voltage supported by MAX20031BATMA/V+T during cold-crank operation?
The MAX20031BATMA/V+T supports input voltages as low as 2V when the preboost controller is enabled, ensuring continuous regulation of both Buck 1 (5V) and Buck 2 (3.3V) outputs during automotive cold-crank events. This capability is validated across the full -40°C to +125°C temperature range and does not require external circuitry - the preboost activates automatically below ~3.5V VIN, using the TERM pin and internal feedback to sustain output stability.
How is the switching frequency configured on MAX20031BATMA/V+T?
The switching frequency of MAX20031BATMA/V+T is set via an external resistor connected to the FOSC pin, supporting 220kHz to 2.2MHz operation. A 12kΩ resistor yields ~2.2MHz (typ), with ±10% accuracy over temperature and supply. The device also accepts external clock synchronization via FSYNC (1.8–2.6MHz range) and supports spread-spectrum modulation via the SPS pin - all configurable without firmware or I²C interface.
Does MAX20031BATMA/V+T integrate a high-voltage LDO, and what are its key specs?
Yes, MAX20031BATMA/V+T integrates a standalone high-voltage 200mA LDO (OUT4) with input range 3.5V–36V. It supports factory-set 3.3V or 5V outputs (this variant is 5V), ±2% accuracy, 500mV dropout at 200mA, and 25µA quiescent current. Feedback is adjustable via FB4 (1.25V reference), enabling outputs from 1.5V to 10V - making MAX20031BATMA/V+T suitable for powering CAN transceivers, sensors, or MCU peripherals directly from battery.
What protection features are built into MAX20031BATMA/V+T?
MAX20031BATMA/V+T includes cycle-by-cycle current limiting on all three controllers (Buck 1/2 and boost), thermal shutdown at 170°C with 20°C hysteresis, input overvoltage/undervoltage lockout, output overvoltage protection (109% nominal), and open-drain PGOOD monitoring for both buck outputs. These protections are hardware-based, require no configuration, and operate across the full automotive temperature range - ensuring robust fault handling in demanding vehicle environments.
Is MAX20031BATMA/V+T pin-compatible with other devices in the MAX20030/MAX20031 family?
Yes, MAX20031BATMA/V+T is pin-compatible with MAX20030 variants (e.g., MAX20030BATMA/V+T) in the same 48-pin TQFN package. Differences are limited to EN3 logic behavior (1.8V high-threshold in MAX20031 vs. precision 0.95V threshold in MAX20030) and minor electrical specs - allowing drop-in replacement in most designs, though EN3 interface circuitry may require review to ensure compatibility with the logic-high enable scheme of MAX20031BATMA/V+T.
MAX20031BATMA/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:
- -
MAX20031BATMA/V+T FAQ
1.How can I place an order for MAX20031BATMA/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20031BATMA/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 MAX20031BATMA/V+T reliable?
The price and inventory of MAX20031BATMA/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 MAX20031BATMA/V+T is usually 5 days.
3.What payment methods are accepted for MAX20031BATMA/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20031BATMA/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20031BATMA/V+T?
MAX20031BATMA/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20031BATMA/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 MAX20031BATMA/V+T?
For technical support, including MAX20031BATMA/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20031BATMA/V+T requirements.
6.How does Aetrix verify that MAX20031BATMA/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20031BATMA/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 MAX20031BATMA/V+T meets industry standards.
7.What is the process for return or replacement of MAX20031BATMA/V+T?
All MAX20031BATMA/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20031BATMA/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 MAX20031BATMA/V+T part is unused and in its original packaging.
Return procedure for MAX20031BATMA/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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