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Analog Devices Inc./Maxim Integrated MAX20040BATPB/VY+
- Part No.:
- MAX20040BATPB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX20040BATPB/VY+.pdf
- Description:
- IC REG BUCK BST PROG 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:215
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Product details
Overview
MAX20040BATPB/VY+ 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 use in infotainment power rails and start-stop systems.
For engineers reviewing the MAX20040BATPB/VY+ datasheet, MAX20040BATPB/VY+ pinout, MAX20040BATPB/VY+ application, or MAX20040BATPB/VY+ equivalent, key selection criteria include its 20-pin SWTQFN package, 5V fixed/4V–15V adjustable output, spread-spectrum EMI reduction, skip-mode efficiency at light load, and 40V transient tolerance-critical for cold-crank and load-dump robustness in automotive PoL designs.
Technical Context
The MAX20040BATPB/VY+ implements a current-mode, peak-controlled buck-boost topology with dual switching nodes (LX1/LX2) and integrated high-side/low-side FETs forming an H-bridge architecture. Its control loop uses an internal transconductance error amplifier (gm = 450–1000μS) with external COMP network compensation, supporting stable operation across buck, boost, and buck-boost regions-including deep-boost conditions down to VIN = 2V after startup.
It integrates a 4.6V linear regulator (VCC) powered initially from IN and later from OUT, enabling extended 2V operation post-startup. Protection includes cycle-by-cycle current limiting (ILIMIT1 = 1.9–2.5A), overvoltage detection (105.5–110.8% of VOUT), thermal shutdown at 166°C with 18°C hysteresis, and hiccup-mode short-circuit recovery with 26ms autoretry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2V to 36V (post-startup); supports cold-crank down to 2V and tolerates 40V transients |
| Output Current | Up to 1.2A continuous; enables compact PoL supplies for automotive ECUs and displays |
| Switching Frequency | 200kHz to 2.2MHz (resistor-programmable via FSW pin); allows small inductors & capacitors |
| Quiescent Current | 52μA in standby mode; meets OEM requirements for always-on vehicle modules |
| Output Voltage | Fixed 5V or adjustable 4.0V–15V via FB resistive divider; ±2% regulation accuracy |
| Package | 20-pin SWTQFN (4mm × 4mm); side-wettable for automated optical inspection (AOI) |
| Temperature Range | −40°C to +125°C ambient; qualified per AEC-Q100 Grade 1 |
Pinout & Package
MAX20040BATPB/VY+ is housed in a 20-pin, 4mm × 4mm side-wettable TQFN (SWTQFN) package with exposed thermal pad (EP). The pinout supports full H-bridge control, feedback regulation, spread-spectrum enable, and power-good monitoring.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Main power input | Accepts 2V–36V; powers internal bias and H-bridge FETs; requires ≥4.7μF ceramic bypass to PGND |
| LX1, LX2 | Switching nodes | LX1 connects to IN–PGND path; LX2 connects to OUT–PGND path; both require low-inductance layout |
| BST1, BST2 | Bootstrap supplies | Each drives high-side gate of respective H-bridge leg; requires 100nF ceramic capacitor to LX1/LX2 |
| FB | Voltage feedback input | Connects to resistive divider for adjustable output (4V–15V) or to VCC for fixed 5V |
| PGOOD | Open-drain status indicator | Asserts when VOUT ≥96% of target; deasserts at ≤93%; requires pull-up to BIAS |
| FSYNC | Mode & sync control | AGND = skip mode; VCC = forced PWM; external clock input supports ±10% frequency sync |
| SPS | Spread-spectrum enable | Pull-high enables ±3% frequency modulation to reduce EMI peaks; disabled during external sync |
| EN | High-voltage enable | 3.3V–40V compatible logic input; enables device after UVLO thresholds are met |
Key Features
| Feature | Design Value |
|---|---|
| Integrated H-bridge FETs | Eliminates 4 external MOSFETs and associated gate drivers; reduces BOM count and board area |
| 2.2MHz max switching frequency | Enables <1μH inductors and <22μF output capacitance; minimizes solution size for space-constrained modules |
| Skip mode with 52μA IQ | Maintains >85% efficiency at 1mA load; extends battery life in always-on automotive subsystems |
| 40V transient tolerance | Withstands ISO 7637-2 pulse 5a (load dump) without external TVS; simplifies front-end protection |
| AEC-Q100 Grade 1 | Validated for −40°C to +125°C operation; meets automotive reliability and qualification requirements |
Applications
| Infotainment Systems | Body Electronics |
|---|---|
Use Scenario: Powering display backlight drivers and audio amplifiers in head units with wide battery voltage swing (6V–16V) and stop-start cycling. IC Role / Device Role / Timing Role: Primary buck-boost PoL regulator delivering stable 5V/12V from vehicle battery; manages cold-crank dips and load-dump surges. Use Value: Maintains uninterrupted operation during engine cranking (VIN ≥2V) and eliminates need for secondary LDOs or discrete protection circuits. | Use Scenario: Supplying door module microcontrollers and sensor interfaces where space and low IQ are critical. IC Role / Device Role / Timing Role: Always-on 5V rail generator with ultra-low standby current; supports wake-on-LIN/CAN functionality. Use Value: 52μA quiescent current ensures compliance with OEM parasitic draw limits (<100μA) over 10-year vehicle lifetime. |
| Start-Stop Systems | Power over Coax (PoC) |
Use Scenario: Providing regulated 5V/9V to camera ECU and ADAS sensors during repeated engine restarts with rapid VIN transitions. IC Role / Device Role / Timing Role: Input-tolerant buck-boost controller maintaining output regulation during 0.5s–2s VIN drop to 3.5V or lower. Use Value: Seamless transition between battery and alternator sources without brownout or reset; no external supervision required. | Use Scenario: Generating clean 12V rail from coaxial cable-fed 5V/9V input in rear-view camera or radar modules. IC Role / Device Role / Timing Role: Bidirectional buck-boost converter enabling voltage step-up/down on single coax conductor with minimal ripple. Use Value: Supports PoC compliance by delivering low-noise 12V output with <10mVpp ripple and fast transient response (<50μs). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20040DATPB/VY+ | Same 1.2A rating and pinout; differs in output voltage option (adjustable-only, no fixed 5V) | Requires external FB divider for all outputs; not suitable for fixed-5V legacy designs | Select MAX20040DATPB/VY+ only if adjustable output is mandatory and 5V fixed is unused |
| LM61480-Q1 | 1.5A output, 2.1MHz max freq, no integrated H-bridge (external FETs required), no spread spectrum | Higher current but larger solution size; lacks skip-mode IQ optimization and EMI reduction features | Choose LM61480-Q1 only when >1.2A output or different thermal profile is required |
Compared with MAX20040BATPB/VY+, MAX20040DATPB/VY+ removes fixed-5V capability but retains identical packaging and efficiency; LM61480-Q1 offers higher current but increases design complexity with external FETs and lacks integrated EMI mitigation-making MAX20040BATPB/VY+ optimal for compact, low-IQ, EMI-sensitive automotive PoL applications.
Availability
MAX20040BATPB/VY+ is available at Aetrix Electronics and suitable for infotainment systems, body electronics, and start-stop power supplies requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for MAX20040BATPB/VY+ 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, and communications markets with precision power, sensing, and timing solutions.
The MAX20040 is part of Analog Devices' automotive power management portfolio, designed specifically for robust, space-efficient DC-DC conversion in harsh vehicle environments-emphasizing low IQ, wide VIN, and AEC-Q100 reliability.
FAQ
What is the maximum output current supported by the MAX20040BATPB/VY+?
The MAX20040BATPB/VY+ supports up to 1.2A continuous output current under typical operating conditions (TA = −40°C to +125°C, VIN = 14V). This rating is validated across the full automotive temperature range and accounts for thermal derating on standard four-layer PCBs. Peak current limit is 1.9–2.5A (cycle-by-cycle), enabling robust overload handling without latch-off.
Does the MAX20040BATPB/VY+ support fixed 5V output without external components?
Yes, the MAX20040BATPB/VY+ supports fixed 5V output by connecting the FB pin directly to the VCC pin-no external resistor divider is needed. This configuration leverages an internal precision voltage divider referenced to the 1.25V bandgap, delivering ±2% output accuracy across line, load, and temperature. The part number suffix "BATPB" explicitly denotes the 5V fixed-output variant.
How does the MAX20040BATPB/VY+ achieve low EMI in automotive applications?
The MAX20040BATPB/VY+ reduces EMI through two integrated mechanisms: (1) spread-spectrum frequency modulation (±3% around fSW, enabled via SPS pin), and (2) external clock synchronization (FSYNC pin) to align switching edges with system clocks. Both features suppress narrowband radiated emissions without requiring additional filtering components-critical for meeting CISPR 25 Class 5 limits in infotainment and ADAS modules.
What is the minimum input voltage the MAX20040BATPB/VY+ can regulate from after startup?
After initial startup (requiring VIN > 3.5V and VCC UVLO clearance), the MAX20040BATPB/VY+ operates down to 2V input voltage. This extended range is enabled by powering the internal bias regulator from the OUT pin once VOUT exceeds ~3.2V-leveraging the H-bridge architecture to sustain regulation during deep cold-crank events common in 12V automotive systems.
Is the MAX20040BATPB/VY+ pin-compatible with other devices in the MAX20039/MAX20040 family?
Yes, all MAX20039/MAX20040 variants-including MAX20040BATPB/VY+, MAX20040DATPB/VY+, and MAX20039BATPA/VY+-share identical 20-pin SWTQFN pinouts and footprint. Functionally, EN, FSYNC, SPS, PGOOD, and FB pins behave identically across variants; differences are limited to output voltage configuration (fixed vs. adjustable) and current rating (0.6A vs. 1.2A), allowing direct substitution in most layouts with firmware or resistor-divider updates.
MAX20040BATPB/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tube
- 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)
MAX20040BATPB/VY+ FAQ
1.How can I place an order for MAX20040BATPB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20040BATPB/VY+ 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 MAX20040BATPB/VY+ reliable?
The price and inventory of MAX20040BATPB/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20040BATPB/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20040BATPB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20040BATPB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20040BATPB/VY+?
MAX20040BATPB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20040BATPB/VY+ 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 MAX20040BATPB/VY+?
For technical support, including MAX20040BATPB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20040BATPB/VY+ requirements.
6.How does Aetrix verify that MAX20040BATPB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20040BATPB/VY+ 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 MAX20040BATPB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20040BATPB/VY+?
All MAX20040BATPB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20040BATPB/VY+, 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 MAX20040BATPB/VY+ part is unused and in its original packaging.
Return procedure for MAX20040BATPB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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