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Analog Devices Inc./Maxim Integrated MAX25223ATPA/VY+
- Part No.:
- MAX25223ATPA/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX25223ATPA/VY+.pdf
- Description:
- IC REG BUCK 5V 3.5A 20SWTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:124
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Product details
Overview
The MAX25223ATPA/VY+ from Analog Devices is an AEC-Q100 qualified automotive 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 42V load-dump protection - enabling robust power conversion in engine control units and ADAS domain controllers.
For engineers reviewing the MAX25223ATPA/VY+ datasheet, MAX25223ATPA/VY+ pinout, MAX25223ATPA/VY+ application, or MAX25223ATPA/VY+ equivalent, key selection criteria include its 20-pin side-wettable TQFN package, PGOOD monitoring capability, spread-spectrum EMI reduction via SPS pin, dropout operation at 99% duty cycle, and factory-trimmed 5V output with internal soft-start.
Technical Context
This current-mode-controlled buck regulator uses an internal slope-compensated PWM architecture with fixed 2.1MHz oscillator (also available in 400kHz variant), eliminating external compensation. Its symmetrical 4mm × 4mm SW-TQFN layout minimizes magnetic field coupling and enables ultra-low-noise operation through dual-SUP capacitor placement and exposed-pad thermal management.
The device implements intelligent light-load management: automatic entry into skip mode below ~600mA peak inductor current, disabling the internal LDO to sustain 5µA IQ; forced PWM mode is enabled via SYNC pin biasing to BIAS. Overvoltage protection clamps error amplifier output during dropout exit to limit output overshoot, while hiccup-mode short-circuit protection and thermal shutdown at 175°C ensure automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3.5A continuous - supports high-power microcontrollers and sensor clusters without external FETs |
| Input Voltage Range | 3V to 36V - accommodates cold-crank (3V) and load-dump (42V transient) conditions in 12V/24V automotive systems |
| Fixed Output Voltage | 5.0V ±2% - factory-trimmed for direct compatibility with 5V logic, CAN transceivers, and analog sensors |
| Quiescent Current | 5µA at no load - extends battery life in always-on modules such as telematics and body control units |
| Switching Frequency | 2.1MHz (typ) - enables use of small 2.2µH inductors and 35µF ceramic output capacitors, avoiding AM-band interference |
| Minimum On-Time | 65ns - supports high step-down ratios (e.g., 24V→5V at D ≈ 21%) without pulse-skipping instability |
| Duty Cycle Max | 99% - maintains regulation during deep dropout (e.g., 5.5VIN→5VOUT) with minimal voltage headroom |
| PGOOD Threshold | 92%–95% UV / 104%–108% OV - provides precise power-rail monitoring for safety-critical sequencing in ASIL-B systems |
Pinout & Package
MAX25223ATPA/VY+ is housed in a 4mm × 4mm, 20-pin side-wettable TQFN package (package code T2044Y+5C) with exposed thermal pad. The symmetrical pin arrangement - including dual SUP pins (pins 4,5,11), dual PGND (pins 7,10), and separated AGND (pin 13) - enables optimized high-frequency current-loop routing and superior EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | High-voltage enable input | Accepts 0.55V–1.45V logic thresholds; compatible with 3.3V MCU GPIO or automotive KEY/CAN inhibit signals; no internal pullup/pulldown |
| BST (Pin 2) | 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 (3V–36V) | Dual-supply configuration reduces input ripple current; each requires local 4.7µF ceramic decoupling |
| LX (Pins 8,9) | Switch node connecting internal FETs to external inductor | High dv/dt node; must be routed with minimal loop area to reduce EMI; internal clamp diodes to PGND/AGND/SUP |
| BIAS (Pin 15) | Internal 5V LDO output | Supplies internal circuitry post-soft-start; used for PGOOD pullup and SYNC/SPS biasing; requires ≥1µF ceramic bypass |
| SYNC (Pin 17) | Mode control and external clock input | Ground = skip mode; BIAS = forced PWM; external clock = synchronized operation; includes 1MΩ internal pulldown |
| PGOOD (Pin 18) | Open-drain power-good indicator | Asserts low when VOUT < 92% or > 106% nominal; requires external 10kΩ pullup; debounced (60–110µs) |
| SPS (Pin 20) | Spread-spectrum enable | Logic-high enables ±6% frequency modulation to reduce EMI peaks; active only with internal oscillator (not SYNC-driven) |
| PGND (Pins 7,10) | Power ground return | Low-impedance path for high-current switching loops; must connect directly to exposed thermal pad |
| AGND (Pin 13) | Analog ground reference | Separate from PGND to isolate sensitive feedback and error amplifier; connected via short thick trace |
| OUT (Pin 14) | Output voltage sense and feedback node | Direct connection to output capacitor; internal 1V reference; bypassed with ceramic caps to PGND |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates need for external MOSFETs and drivers - reduces BOM count by ≥6 components and PCB area by >40% |
| AEC-Q100 Grade-1 qualification | Validated for -40°C to +125°C ambient operation with 95,000-hour lifetime at TJ = +125°C |
| 42V load-dump protection | Withstands ISO 7637-2 Pulse 5a transients without external TVS - simplifies front-end protection design |
| Side-wettable TQFN package | Enables automated optical inspection (AOI) of solder joints - critical for zero-defect automotive manufacturing |
| Programmable UVLO via EN resistor divider | Allows custom startup voltage threshold (e.g., 6.5V for battery undervoltage lockout) without additional ICs |
| Hiccup-mode short-circuit protection | Shuts down for 7ms (2.1MHz) or 11ms (400kHz) after fault detection - prevents thermal runaway during sustained overload |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powering 32-bit ARM-based microcontroller, CAN FD transceiver, and analog sensor interface in under-hood ECU. IC Role / Device Role / Timing Role: Primary 5V rail generator with PGOOD sequencing for MCU reset and CAN initialization. Use Value: 5µA quiescent current extends stop-start battery life; 42V load-dump tolerance eliminates need for external TVS; 99% duty cycle sustains operation during cranking (6VIN). |
Use Scenario: Supplying vision processor SoC and radar MMIC in front-camera module with strict EMI limits. IC Role / Device Role / Timing Role: High-efficiency 5V intermediate rail feeding downstream LDOs and SerDes PHYs. Use Value: 2.1MHz switching + spread-spectrum (SPS pin) meets CISPR 25 Class 5 radiated emissions; symmetrical layout minimizes common-mode noise coupling to image sensor. |
| Body Control Module (BCM) | Infotainment Head Unit |
Use Scenario: Powering LIN transceivers, LED drivers, and EEPROM in door module with extended temperature requirements. IC Role / Device Role / Timing Role: Always-on 5V supply with programmable UVLO to prevent brownout resets during battery voltage sag. Use Value: Factory-trimmed 5V output ensures ±2% accuracy across -40°C to +125°C; EN pin compatibility with 3.3V MCU GPIO simplifies control interface. |
Use Scenario: Generating 5V rail for USB-C PD controller, audio codec, and display timing controller in center-stack unit. IC Role / Device Role / Timing Role: Main DC-DC stage preceding low-noise LDOs for analog audio and high-speed digital interfaces. Use Value: 65ns minimum on-time supports 12V→5V conversion at full load without frequency foldback; PGOOD enables safe boot sequencing before display initialization. |
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 | 4.5V–36V input, 5A output, 2.1MHz, but 15µA IQ and no spread-spectrum modulation | Higher output current margin; lacks integrated EMI reduction features | Preferred where higher load headroom is required and board-level EMI filtering can be added |
| TPS54560QDGQRQ1 | 3.5V–60V input, 5A output, adjustable VOUT, but 14µA IQ and 100ns min on-time | Wider VIN range and adjustable output; less suitable for tight 5V accuracy or ultra-low-IQ always-on use | Chosen when input transients exceed 42V or when flexible output voltage is needed beyond 3V–5.5V range |
Compared with LM61480QRNXTQ1 and TPS54560QDGQRQ1, the MAX25223ATPA/VY+ delivers superior EMI performance via pin-enabled spread spectrum and lower quiescent current - making it optimal for space-constrained, safety-critical automotive modules where board area and battery drain are primary constraints.
Availability
MAX25223ATPA/VY+ is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, body control modules, and infotainment systems requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for MAX25223ATPA/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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The MAX25223ATPA/VY+ belongs to Analog Devices' automotive power management portfolio, designed specifically for AEC-Q100-compliant DC-DC conversion in harsh environments - emphasizing ultra-low IQ, high-voltage resilience, and EMI-optimized integration.
FAQ
What is the guaranteed output voltage accuracy of the MAX25223ATPA/VY+ over temperature and line?
The MAX25223ATPA/VY+ guarantees ±2% output voltage accuracy across its normal operating input range of +6V to +18V and over the full -40°C to +125°C ambient temperature range. This specification applies specifically to the factory-trimmed 5V version and is validated per AEC-Q100 stress testing protocols. The accuracy is maintained without external resistive feedback networks due to internal trimming.
Does the MAX25223ATPA/VY+ support external synchronization, and what are the valid SYNC input frequencies?
Yes, the MAX25223ATPA/VY+ supports external synchronization via the SYNC pin. For the 2.1MHz variant, valid external clock frequencies range from 1.7MHz to 2.6MHz; for the 400kHz variant, the range is 325kHz to 500kHz. When SYNC is grounded or floating, the device operates in skip mode; when pulled to BIAS, it enters forced-PWM mode - allowing dynamic mode switching during operation.
How does the MAX25223ATPA/VY+ handle dropout conditions, and what is the minimum input voltage for regulation at 5V output?
The MAX25223ATPA/VY+ maintains regulation down to an input voltage of approximately 5.5V at 5V output by operating at up to 99% duty cycle. During dropout, the high-side FET is turned off every 20µs and the low-side FET conducts for ~200ns to recharge the BST capacitor, sustaining gate drive. This enables stable operation during automotive cranking events where battery voltage dips to 6V or lower.
What thermal management provisions are built into the MAX25223ATPA/VY+ package and how should the PCB layout support them?
The MAX25223ATPA/VY+ uses a 20-pin side-wettable TQFN with an exposed thermal pad. PCB layout must solder this pad to a large copper plane on inner and outer layers, using multiple thermal vias to internal ground planes. Thermal resistance is 33°C/W (θJA, 4-layer board); PGND and AGND pins must connect directly to the pad to minimize impedance. Failure to implement proper thermal relief reduces maximum continuous output current by up to 30%.
Can the MAX25223ATPA/VY+ be used with a 3.3V output, and if not, what is the alternative part number?
No, the MAX25223ATPA/VY+ is factory-trimmed exclusively for 5V output. For 3.3V operation, the correct pin-compatible alternative is MAX25223ATPA/VY+T - a distinct orderable part with internal 3.3V feedback divider. Both share identical package, pinout, and electrical characteristics except for output voltage setting and corresponding quiescent current (5µA for 3.3V vs. 8.5µA for 5V variants).
MAX25223ATPA/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-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 5V
- 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)
MAX25223ATPA/VY+ FAQ
1.How can I place an order for MAX25223ATPA/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25223ATPA/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 MAX25223ATPA/VY+ reliable?
The price and inventory of MAX25223ATPA/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX25223ATPA/VY+ is usually 5 days.
3.What payment methods are accepted for MAX25223ATPA/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25223ATPA/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25223ATPA/VY+?
MAX25223ATPA/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25223ATPA/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 MAX25223ATPA/VY+?
For technical support, including MAX25223ATPA/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25223ATPA/VY+ requirements.
6.How does Aetrix verify that MAX25223ATPA/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX25223ATPA/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 MAX25223ATPA/VY+ meets industry standards.
7.What is the process for return or replacement of MAX25223ATPA/VY+?
All MAX25223ATPA/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX25223ATPA/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 MAX25223ATPA/VY+ part is unused and in its original packaging.
Return procedure for MAX25223ATPA/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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