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Analog Devices Inc./Maxim Integrated MAX20031CATMD/V+T
- Part No.:
- MAX20031CATMD/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
MAX20031CATMD/V+T.pdf
- Description:
- IC REG DUAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,814
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Product details
Overview
MAX20031CATMD/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 and stop-start automotive 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 5V buck enabled - used in instrument clusters and head units requiring crank-ready operation.
For engineers reviewing the MAX20031CATMD/V+T datasheet, MAX20031CATMD/V+T pinout, MAX20031CATMD/V+T application, or MAX20031CATMD/V+T equivalent, key selection criteria include cold-crank capability down to 2V VIN, resistor-programmable 220kHz–2.2MHz frequency, 180° out-of-phase dual-buck operation, spread-spectrum EMI reduction, and thermally enhanced 48-pin TQFN package with exposed pad.
Technical Context
The MAX20031CATMD/V+T 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 enabling regulation during 2V battery conditions. Each buck channel features cycle-by-cycle current limiting, 97% max duty cycle, and 50ns minimum on-time for stable 3.3V output at high frequency.
It integrates a high-voltage 200mA LDO (VINLDO = 3.5V–36V) with 500mV dropout at 200mA, programmable output (3.3V/5V factory-set), and separate enable (EN4). The preboost controller uses CS3P/CS3N sensing, TERM-switched feedback, and BSTON status indication - all coordinated under a single -40°C to +125°C automotive temperature grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V–42V normal; extends to 2V with preboost enabled - ensures uninterrupted operation during automotive cold-crank. |
| Quiescent Current (IQ) | 17µA with 3.3V buck active - enables always-on functionality without excessive battery drain. |
| Switching Frequency | Resistor-programmable 220kHz–2.2MHz - allows optimization for size (high-freq) or efficiency (low-freq) and avoids AM band interference. |
| Buck Output Accuracy | ±1% over temp/voltage/load - guarantees stable 5V (VOUT1) and 3.3V (VOUT2) for MCU and interface ICs. |
| LDO Output Capability | 200mA HV LDO with 500mV dropout at 200mA - powers auxiliary circuits directly from battery without external regulators. |
| Thermal Performance | θJA = 23.3°C/W on 4-layer board - supports >2A per buck channel in compact 7mm × 7mm layout with exposed pad. |
| Protection Features | Overvoltage/undervoltage lockout, thermal shutdown (170°C), cycle-by-cycle current limit - meets ASIL-B system-level safety requirements. |
Pinout & Package
Package: 48-pin thermally enhanced TQFN (7mm × 7mm, exposed pad), RoHS-compliant, rated for -40°C to +125°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Main supply input | Accepts 3.5V–42V; connects to preboost output - must be heavily bypassed to support dual 2.2MHz buck converters. |
| DL1, DH1, LX1, CS1, FB1, COMP1, OUT1, PGOOD1 | Buck 1 gate drive & control | Full set for external n-channel MOSFETs: DL1/DH1 drive low/high-side FETs; CS1 senses current; FB1 sets 5V output; PGOOD1 signals regulation status. |
| DL2, DH2, LX2, CS2, FB2, COMP2, OUT2, PGOOD2 | Buck 2 gate drive & control | Identical to Buck 1 but configured for 3.3V output; 180° phase shift reduces input ripple and eases bulk capacitor sizing. |
| CS3P, CS3N, FB3, TERM, BST3, DH3, DL3, LX3, BSTON, COMP3 | Preboost controller interface | Enables synchronous boost operation below 3.5V VIN; TERM disconnects feedback when disabled; BSTON indicates active state. |
| INLDO, OUT4, EN4, FB4, PGND4 | HV LDO subsystem | INLDO accepts 3.5V–36V; OUT4 delivers factory-set 5V or 3.3V; EN4 is HV-tolerant enable; FB4 supports external resistor-divider adjustment. |
| FOSC, FSYNC, SPS, EN1–EN4 | Configuration & control logic | FOSC sets switching frequency via resistor; FSYNC enables external clock sync; SPS toggles spread-spectrum mode; ENx pins independently enable each regulator. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous preboost controller | Extends functional input range to 2V - eliminates need for external boost stage in cold-crank designs. |
| 180° out-of-phase dual buck operation | Halves input ripple current vs. parallel operation - reduces required input capacitance by ~50%. |
| Resistor-programmable 220kHz–2.2MHz switching | Enables use of <2.2µH inductors and 10µF ceramic output caps - shrinks total solution size by >30% vs. 500kHz designs. |
| Spread-spectrum modulation (SPS pin) | Reduces peak EMI by ±6% frequency dither - meets CISPR-25 Class 5 radiated emissions without added shielding. |
| Thermally optimized 48-pin TQFN | θJC = 1°C/W to exposed pad - supports continuous 2.5A per buck channel at +85°C ambient with minimal heatsinking. |
| Automotive-grade protection suite | Includes OV/UVLO, thermal shutdown (170°C), and cycle-by-cycle current limit - satisfies ISO 7637-2 pulse 4 and pulse 5a/b robustness requirements. |
Applications
| Instrument Cluster Power | Navigation Head Unit Supply |
|---|---|
|
Use Scenario: Powers MCU, TFT display backlight, and CAN transceivers in digital instrument clusters subjected to 2V cold-crank and load-dump transients. IC Role / Device Role / Timing Role: Front-end power manager delivering isolated 5V (MCU core), 3.3V (peripherals), and 5V LDO (CAN PHY) with synchronized sequencing. Use Value: Preboost maintains VOUT1/VOUT2 regulation at 2V battery; PGOOD1/PGOOD2 enable safe MCU reset assertion; thermal design sustains operation at 125°C junction. |
Use Scenario: Supplies SoC, audio codec, GPS receiver, and touch controller in infotainment head units with wide input voltage variation. IC Role / Device Role / Timing Role: Dual-buck + LDO PMIC providing clean, sequenced rails with independent enable control and fault reporting. Use Value: 2.2MHz operation avoids AM/FM bands; spread spectrum minimizes noise coupling into analog audio paths; EN4-controlled LDO powers noise-sensitive RF sections. |
| Distributed DC Power System | ADAS Camera Module Supply |
|
Use Scenario: Centralized power hub in zonal architecture supplying multiple ECUs via daisy-chained 12V distribution with local point-of-load regulation. IC Role / Device Role / Timing Role: High-efficiency front-end regulator converting battery to stable intermediate bus (5V/3.3V) for downstream POL converters. Use Value: 97% max duty cycle enables dropout operation during engine cranking; low IQ preserves battery during sleep modes; robust OVP/UVP protects downstream converters. |
Use Scenario: Powers image sensor, ISP, and serializer in rear-view or surround-view camera modules exposed to extreme ambient temperatures. IC Role / Device Role / Timing Role: Crank-ready triple-output supply with tight output tolerance and fast transient response for pixel clock stability. Use Value: 50ns min on-time ensures stable 3.3V output at 2.2MHz; thermal shutdown at 170°C prevents latch-up in sealed enclosures; -40°C to +125°C rating matches camera housing specs. |
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 |
|---|---|---|---|
| MAX20030CATMD/V+T | Same pinout and feature set; differs only in EN3 threshold (0.95V vs. 1.8V logic-high for MAX20031) and internal LDO default voltage (5V only vs. 3.3V/5V option). | Preferred where simpler EN3 logic interface is needed and 3.3V LDO output is not required. | Select MAX20030CATMD/V+T if using standard CMOS logic for EN3 and no LDO voltage flexibility is needed. |
| MPQ4332GSD-AEC1 | Dual 3A buck only (no preboost or LDO); 2.2MHz fixed frequency; requires external boost for <3.5V operation. | Suitable for non-cold-crank systems or where preboost is implemented separately; lacks integrated LDO for auxiliary rail. | Choose MPQ4332GSD-AEC1 only when preboost is unnecessary and board space allows discrete boost + LDO implementation. |
Compared with MAX20030CATMD/V+T, the MAX20031CATMD/V+T offers configurable EN3 logic polarity and factory-selectable LDO output voltage - critical for flexible system-level enable sequencing and mixed-voltage peripheral support. Against MPQ4332GSD-AEC1, it provides full front-end integration, eliminating three external components and reducing BOM count while ensuring crank-ready operation.
Availability
MAX20031CATMD/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 MAX20031CATMD/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 precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX20030/MAX20031 product line delivers complete front-end power solutions for automotive ECUs - integrating dual buck, preboost, and HV LDO to replace discrete power trees in crank-ready, ASIL-compliant systems.
FAQ
What is the minimum input voltage supported by MAX20031CATMD/V+T during cold-crank conditions?
The MAX20031CATMD/V+T supports operation down to 2V input when the synchronous preboost controller is enabled. This capability is verified across the full -40°C to +125°C temperature range and allows continuous regulation of both 5V and 3.3V outputs during automotive cold-crank events, as confirmed in the device's Electrical Characteristics table under "Supply Voltage Range (with preboost enabled)".
Does MAX20031CATMD/V+T support external synchronization of its switching frequency?
Yes, MAX20031CATMD/V+T supports external clock synchronization via the FSYNC pin, accepting input frequencies from 250kHz to 2.6MHz depending on RFOSC setting. The device locks to the external clock with 1:1 ratio and maintains forced PWM mode during sync - enabling EMI reduction through frequency alignment with other system clocks or noise-sensitive bands.
How is the output voltage of the integrated LDO configured on MAX20031CATMD/V+T?
The LDO output voltage on MAX20031CATMD/V+T is factory-configured as either 3.3V or 5V - the "C" in the part number MAX20031CATMD/V+T denotes the 3.3V LDO option. Configuration is done via internal resistor divider connected to FB4; no external components are required for the default output, though FB4 remains accessible for adjustable configurations using an external divider.
What thermal performance can be expected from MAX20031CATMD/V+T in a typical 4-layer PCB layout?
In a standard 4-layer JEDEC-compliant board, MAX20031CATMD/V+T achieves θJA = 23.3°C/W and θJC = 1°C/W. This allows sustained operation at full load (2.5A per buck channel) up to +85°C ambient with junction temperature held below 125°C - validated in thermal characterization reports and confirmed by the 150°C absolute maximum junction rating.
Can MAX20031CATMD/V+T operate in skip mode, and how is it enabled?
Yes, MAX20031CATMD/V+T supports ultralow-IQ skip mode for light-load efficiency. It is enabled automatically when FSYNC is left floating or pulled low while FOSC is configured - no additional control signals required. Skip mode reduces IQ to 17µA (with 3.3V buck active) and eliminates audible noise, as documented in the "Benefits and Features" section and Electrical Characteristics table.
MAX20031CATMD/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) Synchronous (2), Step-Up (Boost) (1), Linear (LDO) (1)
- Number of Outputs:
- 4
- Frequency - Switching:
- 220kHz ~ 2.2MHz
- Voltage/Current - Output 1:
- 1V ~ 10V, 20A
- Voltage/Current - Output 2:
- 1V ~ 10V, 20A
- Voltage/Current - Output 3:
- Adjustable, 1.005V ~ 42V
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 3.5V ~ 42V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFN (7x7)
MAX20031CATMD/V+T FAQ
1.How can I place an order for MAX20031CATMD/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20031CATMD/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 MAX20031CATMD/V+T reliable?
The price and inventory of MAX20031CATMD/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 MAX20031CATMD/V+T is usually 5 days.
3.What payment methods are accepted for MAX20031CATMD/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20031CATMD/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20031CATMD/V+T?
MAX20031CATMD/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20031CATMD/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 MAX20031CATMD/V+T?
For technical support, including MAX20031CATMD/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20031CATMD/V+T requirements.
6.How does Aetrix verify that MAX20031CATMD/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20031CATMD/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 MAX20031CATMD/V+T meets industry standards.
7.What is the process for return or replacement of MAX20031CATMD/V+T?
All MAX20031CATMD/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20031CATMD/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 MAX20031CATMD/V+T part is unused and in its original packaging.
Return procedure for MAX20031CATMD/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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