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Analog Devices Inc./Maxim Integrated MAX25223ATPB/VY+T
- Part No.:
- MAX25223ATPB/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX25223ATPB/VY+T.pdf
- Description:
- IC REG BUCK 3.3V 3.5A 20SWTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,246
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Product details
Overview
MAX25223ATPB/VY+T from Analog Devices is an automotive-grade synchronous buck converter with integrated high-side and low-side MOSFETs, delivering up to 3.5A output current across a 3V–36V input range while consuming only 5µA quiescent current at no load. It features ±2% output voltage accuracy (5V fixed), 2.1MHz switching frequency, 65ns minimum on-time, and AEC-Q100 qualification for under-hood automotive power rails.
For engineers reviewing the MAX25223ATPB/VY+T datasheet, MAX25223ATPB/VY+T pinout, MAX25223ATPB/VY+T application, or MAX25223ATPB/VY+T equivalent, key selection criteria include dropout operation at 99% duty cycle, 42V load-dump protection, PGOOD monitoring with ±2% OV/UV thresholds, and side-wettable TQFN-20 package compatibility with automotive thermal and EMI requirements.
Technical Context
The MAX25223ATPB/VY+T employs current-mode control with internal slope compensation, enabling stable regulation without external compensation components. Its 65ns minimum on-time supports high step-down ratios (e.g., 36V→5V), while the 2.1MHz fixed-frequency operation minimizes external component size and avoids AM-band interference.
It integrates dual MOSFETs (70mΩ HS/LS RDS(on)), a 5V BIAS LDO, programmable UVLO via EN resistor divider, and spread-spectrum modulation (±6%) enabled by the SPS pin - all operating across –40°C to +125°C ambient with thermal shutdown at +175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3.5A continuous - sufficient for powering ADAS sensors, infotainment SoCs, or body-control modules |
| Input Voltage Range | 3V to 36V - covers cold-crank (3V), nominal 12V/24V, and 42V load-dump transients without external clamping |
| Quiescent Current | 5µA at no load - enables always-on functionality in vehicle battery systems without excessive parasitic drain |
| Output Voltage Accuracy | ±2% over +6V to +18V input - ensures reliable logic-level compliance for downstream 5V microcontrollers and interfaces |
| Switching Frequency | 2.1MHz (fixed) - allows use of compact 2.2µH inductors and <10µF ceramic output capacitors, reducing board area |
| Duty Cycle Max | 99% - sustains regulation during deep dropout (e.g., 5.5VIN → 5VOUT), critical for start-stop engine operation |
| PGOOD Thresholds | UV: 92% / OV: 106% of VOUT - provides precise power-rail monitoring for safety-critical automotive sequencing |
Pinout & Package
The MAX25223ATPB/VY+T is housed in a 4mm × 4mm, 20-pin side-wettable TQFN (SW-TQFN) package with exposed thermal pad, optimized for automotive PCB assembly and reflow inspection. Pin 1 is marked by a dot; pins 3, 6, 12, 16, and 19 are NC (no-connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | High-voltage enable input | Accepts 0.55V–1.45V logic thresholds; supports direct connection to 3.3V MCU GPIO or automotive KEY/CAN inhibit signals |
| BST | Bootstrap supply for high-side gate driver | Requires 0.1µF ceramic capacitor to LX; enables efficient 100% duty-cycle operation during dropout |
| SUP (pins 4,5,11) | Main power input | Three dedicated SUP pins reduce IR drop and improve EMI performance; each requires local 4.7µF ceramic decoupling |
| LX (pins 8,9) | Switch node | Connects to inductor; internal clamp diodes to PGND/AGND/SUP require careful layout to avoid exceeding thermal limits |
| BIAS | Internal 5V bias supply output | Provides regulated 5V for external pullups (e.g., PGOOD) and SYNC/SPS logic; requires ≥1µF ceramic bypass to PGND |
| PGOOD | Open-drain power-good indicator | Active-high signal pulled low if VOUT falls below 92% or rises above 106%; needs external 10kΩ pullup to BIAS or system rail |
| SYNC | Mode control and synchronization input | Pulled low = skip mode (ultra-low IQ); tied to BIAS = forced PWM (constant fSW, improved EMI); accepts external clock up to 500kHz |
| SPS | Spread-spectrum enable | Logic-high enables ±6% frequency modulation to reduce peak EMI emissions; internal 1MΩ pulldown ensures default disable |
| PGND (pins 7,10,14) | Power ground return | Multiple low-inductance paths minimize ground bounce; must be shorted to AGND near exposed thermal pad |
| AGND | Analog ground reference | Separate from PGND but connected via short, thick trace; critical for PGOOD accuracy and error-amplifier stability |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates external MOSFETs and drivers - reduces BOM count by ≥6 components and simplifies layout for space-constrained ECUs |
| 42V load-dump protection | Withstands ISO 7637-2 Pulse 5a transients without external TVS - lowers system cost and improves reliability in 12V/24V vehicles |
| 99% duty-cycle dropout operation | Maintains regulation down to VIN = VOUT + 0.2V - essential for engine start-stop systems where battery dips to 5.5V |
| Side-wettable TQFN-20 package | Enables automated optical inspection (AOI) of solder joints - meets automotive manufacturing traceability and zero-defect requirements |
| Programmable UVLO via EN divider | Allows custom startup voltage (e.g., 6.5V) to prevent brownout during cranking - avoids unintended resets in safety-critical modules |
| Thermal shutdown with 15°C hysteresis | Shuts down at +175°C junction temperature and auto-restarts after cooling - protects against sustained overload in enclosed enclosures |
Applications
| ADAS Camera Power Supply | Automotive Infotainment Core Rail |
|---|---|
Use Scenario: Powers 5V image sensor and ISP in forward-facing camera module exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Primary 5V buck regulator supplying noise-sensitive analog and digital blocks; PGOOD sequences sensor initialization. Use Value: 5µA IQ preserves battery during parking mode; 42V tolerance survives jump-start transients; ±2% accuracy ensures ADC reference stability. |
Use Scenario: Generates stable 5V core supply for ARM-based infotainment head unit with multi-GHz CPU and GPU. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter supporting dynamic voltage scaling; SYNC pin enables forced PWM during video rendering. Use Value: 2.1MHz operation enables small 2.2µH inductor and 35µF ceramic output cap; spread spectrum (SPS) reduces radiated EMI near FM radio band. |
| Body Control Module (BCM) Subsystem | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Supplies 5V to LIN transceivers, door-lock actuators, and interior lighting controllers in centralized BCM. IC Role / Device Role / Timing Role: Always-on power source with programmable UVLO; EN controlled by vehicle wake-up CAN message. Use Value: 99% duty cycle maintains 5V output during 6V cold-crank; multiple SUP/PGND pins lower impedance for burst-current loads like solenoid drivers. |
Use Scenario: Provides clean 5V rail to torque and position sensors in EPS motor control unit subject to high EMI and vibration. IC Role / Device Role / Timing Role: Low-noise power conditioner with symmetrical SUP/LX layout; AGND/PGND separation minimizes sensor offset drift. Use Value: Side-wettable TQFN ensures solder-joint reliability under thermal cycling; PGOOD monitors rail integrity before torque-command validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRNXTQ1 | 3.6A output, 4.2V–36V input, 12µA IQ, 2.1MHz, QFN-16 | Lacks spread-spectrum modulation and side-wettable pins; lower thermal performance (θJA = 43°C/W vs. 33°C/W) | Preferred when footprint reduction outweighs EMI certification needs and AOI is not required. |
| MPQ4436-AEC1 | 3.5A output, 3.8V–36V input, 15µA IQ, 2.2MHz, QFN-20 | No 42V load-dump rating; UVLO threshold fixed at 4.1V (not programmable); no PGOOD OV detection | Suitable for non-safety-critical cabin modules where load-dump immunity is managed externally. |
Compared with LM61480QRNXTQ1 and MPQ4436-AEC1, the MAX25223ATPB/VY+T delivers superior EMI performance via integrated spread spectrum and side-wettable layout, tighter output accuracy (±2% vs. ±3%), and guaranteed 42V transient handling - making it the preferred choice for ASIL-B compliant power rails requiring zero-layout compromises.
Availability
MAX25223ATPB/VY+T is available at Aetrix Electronics and suitable for automotive ADAS, infotainment, body electronics, and electric power steering applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX25223ATPB/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 power management semiconductors, serving automotive, industrial, and communications markets with precision, reliability, and safety-certified solutions.
The MAX25223ATPB/VY+T belongs to Analog Devices' automotive power management portfolio, designed specifically for demanding under-hood DC-DC conversion where ultra-low quiescent current, wide input range, and robust fault protection are mandatory.
FAQ
What is the maximum input voltage the MAX25223ATPB/VY+T can withstand without damage?
The MAX25223ATPB/VY+T has an absolute maximum SUP rating of +42V, enabling it to survive ISO 7637-2 Load Dump Pulse 5a transients common in 12V and 24V automotive systems. This rating is validated per AEC-Q100 stress testing and does not require external TVS diodes for basic load-dump protection. Operation above 36V is limited to transient conditions ≤1 second.
Does the MAX25223ATPB/VY+T support adjustable output voltage, or is it fixed-only?
The MAX25223ATPB/VY+T is factory-trimmed to a fixed 5V output voltage; it does not support external feedback resistors for adjustment. However, Analog Devices offers other variants in the MAX25223 family with 3.3V output or custom voltages between 3V and 5.5V in 100mV increments - contact factory for availability of non-standard VOUT options.
How does the MAX25223ATPB/VY+T achieve ultra-low 5µA quiescent current?
The MAX25223ATPB/VY+T achieves 5µA IQ by entering standby mode when load current drops below ~5mA: most internal circuitry (including the high-voltage LDO) is disabled, and regulation is maintained using only essential bias and comparator functions. This mode is active only in skip mode with factory-trimmed 5V output - confirmed in Electrical Characteristics Table (ISUP, 5V = 8.5µA typ).
Can the MAX25223ATPB/VY+T operate in forced PWM mode, and how is it enabled?
Yes, the MAX25223ATPB/VY+T supports forced PWM (FPWM) mode to eliminate low-frequency beat notes and improve EMI predictability. FPWM is enabled by connecting the SYNC pin to the internal BIAS voltage (5V) - this overrides skip mode and locks the converter to its nominal 2.1MHz switching frequency regardless of load current.
What thermal performance can be expected from the MAX25223ATPB/VY+T in a four-layer PCB design?
In a standard four-layer board per JEDEC JESD51-7, the MAX25223ATPB/VY+T exhibits θJA = 33°C/W and θJC = 2°C/W. With proper thermal pad soldering to ≥200mm² copper area and ≥6 thermal vias, it sustains 3.5A continuous output at +125°C ambient - verified in Thermal Characteristics section and supported by AEC-Q100 temperature cycling data.
MAX25223ATPB/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-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 3.5A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-SWTQFN (4x4)
MAX25223ATPB/VY+T FAQ
1.How can I place an order for MAX25223ATPB/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25223ATPB/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 MAX25223ATPB/VY+T reliable?
The price and inventory of MAX25223ATPB/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 MAX25223ATPB/VY+T is usually 5 days.
3.What payment methods are accepted for MAX25223ATPB/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25223ATPB/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25223ATPB/VY+T?
MAX25223ATPB/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25223ATPB/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 MAX25223ATPB/VY+T?
For technical support, including MAX25223ATPB/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25223ATPB/VY+T requirements.
6.How does Aetrix verify that MAX25223ATPB/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX25223ATPB/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 MAX25223ATPB/VY+T meets industry standards.
7.What is the process for return or replacement of MAX25223ATPB/VY+T?
All MAX25223ATPB/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX25223ATPB/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 MAX25223ATPB/VY+T part is unused and in its original packaging.
Return procedure for MAX25223ATPB/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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