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Analog Devices Inc./Maxim Integrated MAX20040BATPB/VY+T
- Part No.:
- MAX20040BATPB/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX20040BATPB/VY+T.pdf
- Description:
- IC REG BUCK BST PROG 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,920
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Product details
Overview
MAX20040BATPB/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 operates over –40°C to +125°C for infotainment power rails and start-stop systems.
For engineers reviewing the MAX20040BATPB/VY+T datasheet, MAX20040BATPB/VY+T pinout, MAX20040BATPB/VY+T application, or MAX20040BATPB/VY+T equivalent, key selection considerations include its 20-pin SWTQFN package, 5V fixed/4V–15V adjustable output, spread-spectrum EMI reduction, skip-mode efficiency at light load, and AEC-Q100 qualification for automotive body electronics and PoC systems.
Technical Context
The MAX20040BATPB/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). Its control loop uses an internal transconductance error amplifier (gm = 450–1000μS) with external COMP network compensation and supports both fixed-frequency PWM and skip-mode operation via FSYNC pin logic.
It integrates a 4.6V linear regulator (VCC) powered from OUT after startup, enabling operation down to 2V IN once biased. Protection includes cycle-by-cycle current limiting (ILIMIT1 = 1.9–2.5A), thermal shutdown at 166°C with 18°C hysteresis, overvoltage protection (105.5–110.8% VOUT), and PGOOD monitoring with 94–98.3% rising threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2V to 36V after startup; supports cold-crank and load-dump conditions up to 40V transient tolerance. |
| Output Current | Up to 1.2A continuous; enables single-chip PoL supply for automotive infotainment processors. |
| Switching Frequency | Programmable 200kHz–2.2MHz via resistor on FSW pin; allows compact 1.0μH inductors and low-profile 22μF ceramic output caps. |
| Quiescent Current | 52μA in standby (B/D versions); meets OEM requirements for always-on modules in vehicle sleep modes. |
| Output Accuracy | ±2% over temperature and line/load; ensures stable 5V rail for USB-C PD controllers or CAN transceivers. |
| Package | 20-pin SWTQFN (4mm × 4mm); side-wettable leads enable automated optical solder-joint inspection per IPC-A-610. |
| AEC-Q100 Grade | Grade -40°C to +125°C ambient; qualified for under-hood and dashboard-mounted ECUs without derating. |
Pinout & Package
MAX20040BATPB/VY+T is housed in a 4mm × 4mm, 20-pin side-wettable TQFN (SWTQFN) package with exposed thermal pad (EP) for enhanced heat dissipation in automotive PCB layouts.
| 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. |
| EN | High-voltage enable | 3.3V–40V logic-compatible; enables/disables regulation with internal pull-down; no external level-shifting needed. |
| LX1 / LX2 | H-bridge switching nodes | Connect to external inductor center-tap; require low-inductance layout to minimize EMI and shoot-through risk. |
| BST1 / BST2 | Bootstrap supplies | Each drives respective high-side gate; requires 100nF ceramic capacitor from BSTx to LXx for proper gate drive. |
| FB | Voltage feedback input | 1.25V reference; connect to VCC for fixed 5V output or resistive divider for 4V–15V adjustment. |
| PGOOD | Open-drain power-good | Asserts when VOUT ≥96% of setpoint; used for system sequencing and fault detection in multi-rail designs. |
| FSYNC | Mode/sync control | Pull to AGND for skip mode; pull to VCC or external clock for forced-PWM; enables EMI optimization. |
| SPS | Spread-spectrum enable | Pull high to modulate fSW ±3%; reduces peak EMI emissions without altering average frequency. |
| COMP | Loop compensation node | External Type II network (RC, CC, CF) sets bandwidth and phase margin; critical for stability in deep-boost mode. |
| OUT_S | Remote output sense | Compensates for IR drop in high-current traces; improves regulation accuracy at point-of-load. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated H-Bridge FETs | Eliminates 4 external MOSFETs and drivers; reduces BOM count by ≥8 components and saves >25mm² board area. |
| 200kHz–2.2MHz Programmable fSW | Enables optimal trade-off between size (high fSW) and efficiency (low fSW); avoids AM radio band (530–1710kHz). |
| 52μA Standby Quiescent Current | Extends battery life in always-on vehicle modules; meets ISO 16750-2 "sleep current" limits for Class 3 systems. |
| Spread-Spectrum Modulation | Reduces radiated EMI peaks by up to 10dB; simplifies EMC compliance testing for CISPR 25 Class 5 automotive systems. |
| PGOOD with 3ms Debounce | Prevents false fault triggering during load transients; enables reliable power sequencing with microcontrollers and PMICs. |
| Thermal Shutdown with Auto-Recovery | Shuts down at 166°C junction; restarts after 18°C cooldown; prevents permanent damage during sustained overload or poor heatsinking. |
Applications
| Infotainment Systems | Body Electronics |
|---|---|
Use Scenario: Powering display backlight drivers and audio amplifiers in head units with wide battery voltage swing (6V–16V). IC Role / Device Role / Timing Role: Primary buck-boost PoL regulator delivering regulated 5V/1.2A from vehicle battery with cold-crank support. Use Value: Maintains stable output during engine cranking (down to 2V) without brownout, ensuring uninterrupted UI operation. | Use Scenario: Supplying door module MCUs and LED status indicators subject to load-dump transients (up to 40V). IC Role / Device Role / Timing Role: Robust front-end regulator converting unregulated battery to clean 5V rail with integrated overvoltage protection. Use Value: Withstands 40V transients without external TVS, reducing component count and improving reliability in harsh environments. |
| Start-Stop Systems | Power over Coax (PoC) |
Use Scenario: Providing auxiliary 5V power to camera modules and sensors during engine-off battery-only operation. IC Role / Device Role / Timing Role: Low-IQ buck-boost converter maintaining regulated output during extended stop phases (≤52μA IQ). Use Value: Enables >72-hour battery hold-up time for ADAS cameras without compromising vehicle battery health. | Use Scenario: Biasing coaxial video receivers in rear-view camera systems where power and video share one cable. IC Role / Device Role / Timing Role: High-efficiency 5V/1.2A regulator powering receiver ICs while rejecting common-mode noise on coax line. Use Value: Delivers low-noise 5V rail with <10mVpp ripple, preventing video artifacts caused by switching noise coupling into analog video path. |
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+T | Same silicon, D-grade variant with identical 1.2A rating but higher 2.8A current limit threshold (vs. 1.9–2.5A in B-grade). | Preferred for high-reliability PoC systems requiring tighter current-limit margin under short-circuit stress. | Select MAX20040DATPB/VY+T when design requires higher ILIMIT1 for robust hiccup-mode recovery in safety-critical camera links. |
| LM61480QRNXTQ1 | TI 3.5A buck-only converter; lacks boost capability, no integrated H-bridge, and no 2V startup support. | Suitable only for fixed-battery-rail applications (e.g., 12V→5V) without cold-crank or wide-VIN needs. | Choose LM61480QRNXTQ1 only if input never drops below 3.5V and system does not require buck-boost topology or AEC-Q100 Grade 0. |
Compared with MAX20040DATPB/VY+T, the MAX20040BATPB/VY+T offers lower current-limit threshold for faster fault response in moderate-load systems, while LM61480QRNXTQ1 lacks essential buck-boost functionality and cold-crank support - making MAX20040BATPB/VY+T the sole fit for true automotive wide-input PoL applications.
Availability
MAX20040BATPB/VY+T is available at Aetrix Electronics and suitable for infotainment systems, body electronics, and start-stop systems requiring stable component supply with full AEC-Q100 traceability and automotive-grade lot documentation.
Supply support for MAX20040BATPB/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.
The MAX20040 is part of Analog Devices' automotive power management portfolio, designed specifically for demanding vehicle subsystems requiring wide-input, high-efficiency, and AEC-Q100-compliant DC-DC conversion in space-constrained layouts.
FAQ
What is the minimum input voltage required for startup of the MAX20040BATPB/VY+T?
The MAX20040BATPB/VY+T requires IN ≥ 3.5V to initiate startup and bias the internal regulator. Once operational, it sustains regulation down to 2V input - critical for cold-crank scenarios in 12V automotive systems. Startup behavior is confirmed in the Recommended Operating Conditions table (p.3) and Detailed Description section (p.11) of the datasheet.
Does the MAX20040BATPB/VY+T support adjustable output voltage, and what is the range?
Yes, the MAX20040BATPB/VY+T supports adjustable output from 4.0V to 15.0V using an external resistive divider on the FB pin. When FB is tied to VCC, it defaults to a precise 5.0V fixed output (±2%). This dual-mode flexibility is documented in the General Description (p.2) and Electrical Characteristics (p.4) sections.
How does the MAX20040BATPB/VY+T achieve EMI reduction?
The MAX20040BATPB/VY+T reduces EMI via three methods: (1) spread-spectrum modulation (±3% fSW) enabled by the SPS pin, (2) external frequency synchronization via FSYNC to align switching edges with system clocks, and (3) high 2.2MHz maximum frequency minimizing energy in the AM band. These features are detailed in the Benefits and Features (p.2) and Detailed Description (p.11) sections.
What protection features are integrated into the MAX20040BATPB/VY+T?
The MAX20040BATPB/VY+T integrates cycle-by-cycle current limiting (ILIMIT1 = 1.9–2.5A), thermal shutdown at 166°C with 18°C hysteresis, output overvoltage protection (105.5–110.8% VOUT), and hiccup-mode short-circuit recovery with 26ms autoretry. All protections are production-tested and specified in the Electrical Characteristics tables (pp.4–5) and Detailed Description (p.12).
Is the MAX20040BATPB/VY+T pin-compatible with other devices in the MAX20039/MAX20040 family?
Yes, all MAX20039/MAX20040 variants - including MAX20040BATPB/VY+T, MAX20040DATPB/VY+T, and MAX20039BATPB/VY+T - share identical 20-pin SWTQFN pinouts and footprint. Differences are limited to current rating (0.6A vs. 1.2A), current-limit threshold, and quiescent current behavior - confirmed in the Pin Configurations (p.9) and Ordering Information sections.
MAX20040BATPB/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)
MAX20040BATPB/VY+T FAQ
1.How can I place an order for MAX20040BATPB/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20040BATPB/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 MAX20040BATPB/VY+T reliable?
The price and inventory of MAX20040BATPB/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 MAX20040BATPB/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20040BATPB/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20040BATPB/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20040BATPB/VY+T?
MAX20040BATPB/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20040BATPB/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 MAX20040BATPB/VY+T?
For technical support, including MAX20040BATPB/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20040BATPB/VY+T requirements.
6.How does Aetrix verify that MAX20040BATPB/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20040BATPB/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 MAX20040BATPB/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20040BATPB/VY+T?
All MAX20040BATPB/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20040BATPB/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 MAX20040BATPB/VY+T part is unused and in its original packaging.
Return procedure for MAX20040BATPB/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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