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Analog Devices Inc./Maxim Integrated MAX20040BATPA/VY+T
- Part No.:
- MAX20040BATPA/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX20040BATPA/VY+T.pdf
- Description:
- IC REG BUCK BST PROG 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,620
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Product details
Overview
MAX20040BATPA/VY+T from Analog Devices is an automotive-grade synchronous buck-boost DC-DC converter with integrated H-bridge MOSFETs, delivering up to 1.2A output current across a 2V–36V input range while consuming only 52μA quiescent current in standby mode. It features ±2% output voltage accuracy, 2.2MHz programmable switching frequency, and AEC-Q100 qualification for infotainment and body electronics power rails.
For engineers reviewing the MAX20040BATPA/VY+T datasheet, MAX20040BATPA/VY+T pinout, MAX20040BATPA/VY+T application, or MAX20040BATPA/VY+T equivalent, key selection criteria include cold-crank operation down to 2V post-startup, 40V load-dump tolerance, spread-spectrum EMI reduction, PGOOD monitoring, and compatibility with 4.0V–15V adjustable or fixed 5V output configurations.
Technical Context
The MAX20040BATPA/VY+T implements a current-mode controlled buck-boost topology using an integrated H-bridge architecture with two high-side and two low-side DMOS FETs (RDS(ON) ≤ 150mΩ), enabling seamless transition between buck and boost modes without external control logic. Its internal 4.6V LDO (VCC) powers control circuitry and supports operation down to 2V input after startup via OUT-to-VCC switchover.
Switching frequency is resistor-programmable from 200kHz to 2.2MHz via the FSW pin, with external synchronization capability on FSYNC and optional ±3% spread-spectrum modulation enabled by the SPS pin. Protection includes cycle-by-cycle current limiting (2.15A typical), overvoltage detection (108% VOUT threshold), thermal shutdown at 166°C, and hiccup-mode short-circuit recovery with 26ms autoretry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2V–36V after startup; supports cold-crank operation and tolerates 40V transients |
| Output Current | Up to 1.2A continuous; enables PoL supply for automotive microcontrollers and sensors |
| Quiescent Current | 52μA in standby mode; meets OEM requirements for always-on systems |
| Switching Frequency | Programmable 200kHz–2.2MHz; allows compact 1.0μH inductors and low-ESR ceramic output caps |
| Output Accuracy | ±2% over temperature and line/load; ensures stable 5V or adjustable 4.0V–15V regulation |
| Package | 20-pin SWTQFN (4mm × 4mm); side-wettable leads support automated optical inspection (AOI) |
| Temperature Range | −40°C to +125°C ambient; qualified per AEC-Q100 Grade 1 |
Pinout & Package
MAX20040BATPA/VY+T is housed in a 20-pin side-wettable TQFN package (4mm × 4mm, T2044Y+4C) with exposed thermal pad. Pin functions are validated per Analog Devices' official pin configuration diagram and functional descriptions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Main power input | Accepts 2V–36V; powers internal bias and H-bridge FETs; bypassed with ≥4.7μF ceramic cap to PGND |
| EN | Enable control | High-voltage enable (3.3V–40V compatible); initiates soft-start when pulled high |
| FB | Feedback input | Connects to resistive divider for 4.0V–15V adjustment or to VCC for fixed 5V output |
| PGOOD | Power-good monitor | Open-drain output asserting above 96% VOUT; used for system sequencing and fault reporting |
| FSW | Frequency set | Resistor-to-ground sets switching frequency (e.g., 12kΩ → 2.2MHz); enables precise EMI control |
| LX1 / LX2 | Switching nodes | Connect to external inductor; LX1 drives buck path, LX2 drives boost path; require tight layout |
| BST1 / BST2 | Bootstrap supplies | Each requires 100nF capacitor to respective LX node for high-side gate drive |
| OUT_S | Remote sense | Enables Kelvin sensing of output voltage to compensate for PCB trace IR drop |
Key Features
| Feature | Design Value |
|---|---|
| H-bridge integration | Eliminates need for four discrete MOSFETs and associated gate drivers; reduces BOM count and board area |
| Skip mode operation | Enabled via FSYNC = AGND; maintains >85% efficiency at loads <10mA while holding 52μA IQ |
| Spread-spectrum modulation | Configurable via SPS pin; reduces peak EMI emissions by spreading energy across ±3% bandwidth |
| 40V transient tolerance | Withstands automotive load-dump events without external TVS; simplifies front-end protection design |
| Thermal shutdown with hysteresis | Shuts down at 166°C junction temp; restarts automatically after 18°C cooldown; prevents thermal runaway |
Applications
| Infotainment Systems | Body Electronics |
|---|---|
Use Scenario: Powering display controllers, audio amplifiers, and USB-C PD interfaces in center-stack head units. IC Role / Device Role / Timing Role: Primary buck-boost PoL regulator delivering stable 5V/3.3V from battery rail under wide VIN variation including cranking dips. Use Value: Maintains uninterrupted operation during 6V cold-crank events and rejects 40V load-dump spikes without derating. | Use Scenario: Supplying door module ECUs, seat position memory, and LED interior lighting drivers. IC Role / Device Role / Timing Role: Always-on power source with ultra-low 52μA standby current to meet OEM sleep-mode leakage budgets. Use Value: Enables >10-year battery life in parked vehicle state while supporting fast wake-up via EN pin. |
| Start-Stop Systems | Power over Coax (PoC) |
Use Scenario: Providing regulated 5V to engine control sensors and CAN transceivers during repeated engine stop/start cycles. IC Role / Device Role / Timing Role: Input-tolerant DC-DC converter maintaining output stability during 2V–36V battery transients. Use Value: Eliminates need for pre-regulator stages; reduces component count and improves system reliability. | Use Scenario: Biasing camera modules in rear-view and surround-view systems powered over coaxial cable. IC Role / Device Role / Timing Role: High-efficiency buck-boost regulator accepting variable PoC-derived input (e.g., 5V–12V) and delivering clean 3.3V/5V. Use Value: Supports dynamic input range and low-noise operation critical for image sensor signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20039BATPA/VY+T | 0.6A max output current; identical pinout, package, and feature set except lower current rating | Targeted for lower-power body control modules where 1.2A headroom is unnecessary | Select when load current remains ≤600mA and cost optimization is prioritized |
| LM61480QRNXTQ1 | 1.5A output; 3.5V–36V input; no integrated H-bridge (requires external FETs); different pinout and compensation scheme | Used in higher-current ADAS domain controllers requiring greater flexibility in loop tuning and thermal management | Choose when >1.2A is required or when discrete FET selection is needed for specialized thermal layout |
Compared with MAX20039BATPA/VY+T, the MAX20040BATPA/VY+T provides double the output current in identical footprint and pinout-ideal for scaling power without redesign. Versus LM61480QRNXTQ1, it trades external FET flexibility for full integration, smaller solution size, and guaranteed AEC-Q100 compliance out-of-box.
Availability
MAX20040BATPA/VY+T is available at Aetrix Electronics and suitable for infotainment systems, body electronics, start-stop systems, point-of-load (PoL) power supply, and power over coax (PoC) applications requiring stable component supply, automotive qualification, and long-term production continuity.
Supply support for MAX20040BATPA/VY+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power, signal chain, and RF solutions.
The MAX20040 is part of Analog Devices' automotive power management portfolio, designed specifically for robust, low-quiescent-current DC-DC conversion in harsh vehicle environments-including cold-crank, load-dump, and extended temperature operation.
FAQ
What is the minimum input voltage the MAX20040BATPA/VY+T can regulate from after startup?
The MAX20040BATPA/VY+T operates from 2V to 36V once initial startup conditions are met (IN > 3.5V and VCC UVLO cleared). This 2V capability enables reliable regulation during severe cold-crank events common in 12V automotive systems. The device achieves this by powering its internal bias circuitry from the regulated output (OUT) after startup, rather than solely from IN.
Does the MAX20040BATPA/VY+T support remote voltage sensing?
Yes, the MAX20040BATPA/VY+T supports remote sensing via the OUT_S pin. Connecting OUT_S directly to the load-side output trace-separate from the main OUT connection-compensates for IR drop across PCB traces or connectors. This ensures accurate regulation at the point of load, critical for noise-sensitive automotive sensors and processors powered by the MAX20040BATPA/VY+T.
How does the MAX20040BATPA/VY+T handle electromagnetic interference (EMI)?
The MAX20040BATPA/VY+T reduces EMI through three integrated methods: (1) programmable 200kHz–2.2MHz switching frequency to avoid AM radio bands, (2) external clock synchronization (FSYNC) for deterministic noise placement, and (3) spread-spectrum modulation (enabled via SPS pin) that dithers frequency ±3% to lower peak radiated emissions. These features collectively simplify compliance with CISPR 25 Class 5 automotive EMI standards.
Can the MAX20040BATPA/VY+T be used in forced-PWM mode for constant-frequency operation?
Yes, the MAX20040BATPA/VY+T supports forced-PWM mode by pulling the FSYNC pin high (to VCC or BIAS). In this mode, the device operates continuously at the programmed switching frequency regardless of load, eliminating frequency variation and associated acoustic noise. This is especially useful in noise-sensitive applications like camera modules or audio subsystems powered by the MAX20040BATPA/VY+T.
What protection features are built into the MAX20040BATPA/VY+T?
The MAX20040BATPA/VY+T integrates cycle-by-cycle current limiting (2.15A typical), overvoltage protection (108% VOUT trip), thermal shutdown (166°C with 18°C hysteresis), short-circuit hiccup mode (26ms retry), and input undervoltage lockout (4.45V rising, 1.95V falling). These protections operate autonomously without external components, ensuring robust operation in automotive environments where the MAX20040BATPA/VY+T is deployed.
MAX20040BATPA/VY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Programmable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- 15V
- Current - Output:
- 1.2A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-TQFN-EP (4x4)
MAX20040BATPA/VY+T FAQ
1.How can I place an order for MAX20040BATPA/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20040BATPA/VY+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 MAX20040BATPA/VY+T reliable?
The price and inventory of MAX20040BATPA/VY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20040BATPA/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20040BATPA/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20040BATPA/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20040BATPA/VY+T?
MAX20040BATPA/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20040BATPA/VY+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 MAX20040BATPA/VY+T?
For technical support, including MAX20040BATPA/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20040BATPA/VY+T requirements.
6.How does Aetrix verify that MAX20040BATPA/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20040BATPA/VY+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 MAX20040BATPA/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20040BATPA/VY+T?
All MAX20040BATPA/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20040BATPA/VY+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 MAX20040BATPA/VY+T part is unused and in its original packaging.
Return procedure for MAX20040BATPA/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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