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Analog Devices Inc./Maxim Integrated MAX25223ATPA/VY+T
- Part No.:
- MAX25223ATPA/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX25223ATPA/VY+T.pdf
- Description:
- IC REG BUCK 5V 3.5A 20SWTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,981
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Product details
Overview
The MAX25223ATPA/VY+T 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 fixed 5V output, 2.1MHz switching frequency, ±2% output voltage accuracy (6V–18V VIN), and 65ns minimum on-time for high step-down ratios - ideal for automotive body control modules and infotainment power rails.
For engineers reviewing the MAX25223ATPA/VY+T datasheet, MAX25223ATPA/VY+T pinout, MAX25223ATPA/VY+T application, or MAX25223ATPA/VY+T equivalent, key selection criteria include its 42V load-dump tolerance, 99% dropout duty cycle, spread-spectrum EMI reduction via SPS pin, PGOOD monitoring with 92–106% UV/OV thresholds, and side-wettable TQFN-20 package for automated optical inspection (AOI) and thermal reliability in under-hood environments.
Technical Context
This current-mode-controlled buck regulator uses internal slope compensation and requires no external loop compensation. Its 2.1MHz fixed-frequency operation enables compact 2.2µH inductors and ≤35µF ceramic output capacitance while avoiding AM-band interference. The device supports both forced-PWM (via SYNC pin tied to BIAS) and pulse-skipping modes to optimize light-load efficiency.
It integrates a 5V internal BIAS LDO, programmable UVLO via EN resistor divider, and robust protection including 4.7A peak current limit (±12%), thermal shutdown at +175°C, hiccup-mode short-circuit response, and output overvoltage clamping. The symmetrical 4mm × 4mm SW-TQFN layout minimizes magnetic field coupling and improves EMI performance without external shielding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3.5A continuous - supports automotive ECUs requiring stable mid-power rail without external FETs |
| Input Voltage Range | 3V to 36V - covers cold-crank (3V) to load-dump (42V transient) conditions per ISO 7637-2 |
| Quiescent Current | 5µA at no load - extends battery life in always-on vehicle systems like telematics and ADAS sensors |
| Output Voltage Accuracy | ±2% over 6V–18V VIN - ensures reliable logic-level compliance for MCU, CAN transceivers, and display drivers |
| Switching Frequency | 2.1MHz (fixed) - enables small magnetics and reduces output ripple without AM-band interference |
| Minimum On-Time | 65ns - supports 12V-to-5V conversion at >90% duty cycle, critical for high-input automotive applications |
| PGOOD Thresholds | UV: 92% / OV: 106% of VOUT - provides precise power-rail monitoring for system reset sequencing |
Pinout & Package
MAX25223ATPA/VY+T is housed in a 4mm × 4mm, 20-pin Side-Wettable TQFN (SW-TQFN) package with exposed thermal pad. This RoHS-compliant, AEC-Q100 qualified package supports automated optical inspection (AOI) and delivers θJA = 33°C/W on a 4-layer board for reliable thermal performance in under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | High-voltage enable input | Accepts 0.55V–1.45V logic thresholds; compatible with 3.3V microcontrollers and automotive KEY/CAN inhibit signals |
| BST (Pin 2) | Bootstrap supply for high-side gate driver | Requires 0.1µF ceramic capacitor to LX; enables efficient 100% duty-cycle operation in dropout |
| SUP (Pins 4,5,11) | Main power input | Three parallel inputs reduce AC current loop area; each requires local 4.7µF ceramic decoupling |
| LX (Pins 8,9) | Switch node | Connects to inductor; internal clamp diodes protect against inductive kickback during startup/fault |
| BIAS (Pin 15) | Internal 5V LDO output | Supplies internal circuitry; requires ≥1µF ceramic bypass to PGND for stability |
| SYNC (Pin 17) | Mode control / clock sync input | Pulled low → skip mode; tied to BIAS → forced PWM; accepts external 325–500kHz clock |
| PGOOD (Pin 18) | Open-drain power-good indicator | Active-high signal with 92–106% UV/OV window; requires external 10kΩ pullup to BIAS or system rail |
| SPS (Pin 20) | Spread-spectrum enable | Logic-high enables ±6% frequency modulation to reduce EMI peak emissions by >10dB |
| PGND (Pins 7,10,16,19) | Power ground | Multiple low-inductance paths to exposed thermal pad minimize ground bounce and improve EMI |
| AGND (Pin 13) | Analog ground reference | Must be shorted to PGND with thick trace near IC; isolates sensitive feedback path from switching noise |
| OUT (Pin 14) | Output voltage sense | Direct connection to output capacitor; internal 1V reference enables accurate regulation without external resistors |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates external MOSFETs and gate drivers - reduces BOM count by ≥6 components and PCB area by >40% |
| 42V load-dump protection | Withstands ISO 7637-2 Pulse 5a transients without derating or external TVS - simplifies front-end protection design |
| 99% maximum duty cycle | Enables operation down to 3V input while maintaining regulated 5V output - essential for cold-crank survival |
| Side-wettable TQFN-20 package | Enables AOI-compatible solder joint inspection and achieves 2°C/W θJC for direct heat transfer to PCB copper |
| Programmable UVLO via EN divider | Allows custom start-up voltage (e.g., 6.5V) to prevent brownout during engine cranking - no additional supervisor IC needed |
| Internal soft-start (3.5ms) | Prevents inrush current into downstream capacitors; includes 7ms fault hold-off and auto-retry on short-circuit |
Applications
| Automotive Body Control Module (BCM) | ADAS Camera Power Supply |
|---|---|
Use Scenario: Powers microcontroller, LIN transceivers, and LED drivers in door modules and seat controllers under varying battery conditions (3V–16V). IC Role / Device Role / Timing Role: Primary 5V power rail generator with PGOOD sequencing for MCU reset and communication initialization. Use Value: 5µA quiescent current prevents parasitic drain during vehicle sleep mode; 42V tolerance eliminates need for upstream TVS in cost-sensitive BCM designs. |
Use Scenario: Supplies image sensor and ISP in forward-facing camera systems exposed to engine bay temperatures up to +105°C ambient. IC Role / Device Role / Timing Role: High-efficiency 5V regulator with fast transient response to handle burst-mode sensor readouts and video streaming loads. Use Value: 2.1MHz switching enables <2.2µH inductor and <35µF output cap - reducing solution size by 35% vs. 400kHz alternatives while meeting CISPR-25 Class 5 EMI limits. |
| Infotainment Head Unit Core Rail | Telematics Control Unit (TCU) Always-On Supply |
Use Scenario: Generates clean 5V rail for ARM-based application processor, audio codec, and touch controller in center-stack displays. IC Role / Device Role / Timing Role: Main DC-DC converter with spread-spectrum (SPS enabled) to suppress radiated emissions near FM/AM antennas. Use Value: ±6% frequency modulation lowers EMI peaks by >10dB - avoids costly metal shielding and meets OEM RF immunity requirements without layout rework. |
Use Scenario: Provides always-on 5V supply for cellular modem, GNSS receiver, and secure boot MCU in connected vehicle gateways. IC Role / Device Role / Timing Role: Low-IQ buck regulator supporting ASAM-defined sleep states (e.g., ECU Sleep Mode 3) with wake-on-CAN capability. Use Value: 5µA standby current ensures <10µA total system sleep current - extending backup battery life beyond 12 months in disconnected vehicle scenarios. |
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, 8A output, 2.1MHz, but 15µA IQ; no spread-spectrum; requires external compensation | Better suited for higher-current clusters (e.g., digital instrument panels); lacks integrated soft-start and PGOOD UV/OV hysteresis | Select when >5A output or multi-phase scaling is required; avoid if ultra-low IQ or simplified layout is critical |
| TPS54560QPWPRQ1 | 3.5V–60V input, 5A output, 100kHz–2.5MHz adjustable freq, 14µA IQ; external FETs required; no integrated BIAS LDO | Used in 24V commercial truck systems; needs external gate drivers and bias supply - increases BOM and layout complexity | Choose for ultra-wide VIN (e.g., dual-battery 24V systems); not recommended for space-constrained automotive PCBs targeting <5µA IQ |
Compared with LM61480QRNXTQ1 and TPS54560QPWPRQ1, the MAX25223ATPA/VY+T delivers superior integration (integrated FETs, BIAS LDO, soft-start, PGOOD), lowest quiescent current (5µA), and automotive-optimized features (AEC-Q100, load-dump tolerance, side-wettable package) - making it optimal for compact, low-power, production-ready automotive subsystems.
Availability
MAX25223ATPA/VY+T is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, infotainment head units, and telematics control units requiring stable component supply across extended temperature and qualification lifecycles.
Supply support for MAX25223ATPA/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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing (DSP) technologies, serving automotive, industrial, communications, and healthcare markets with precision power, sensing, and signal chain solutions.
The MAX25223ATPA/VY+T belongs to Analog Devices' MAX252xx automotive power management family, engineered specifically for AEC-Q100 Grade 1 (−40°C to +125°C) operation in harsh vehicle environments - emphasizing ultra-low IQ, high VIN resilience, and EMI-robust packaging.
FAQ
What is the guaranteed output voltage accuracy of the MAX25223ATPA/VY+T over temperature and line?
The MAX25223ATPA/VY+T guarantees ±2% output voltage accuracy over the normal operating input range of +6V to +18V and full temperature range (−40°C to +125°C). At 5V output, this corresponds to 4.90V–5.10V in PWM mode and 4.85V–5.06V in skip mode, as confirmed in the Electrical Characteristics table (page 3 of datasheet Rev 0). This accuracy is achieved using factory-trimmed internal feedback and does not require external resistors.
Does the MAX25223ATPA/VY+T support external synchronization, and what frequency range is accepted on the SYNC pin?
Yes, the MAX25223ATPA/VY+T supports external clock synchronization via the SYNC pin. When configured for 2.1MHz operation, it accepts an external clock between 1.7MHz and 2.6MHz; for 400kHz operation, the valid range is 325kHz to 500kHz. The SYNC pin has a 1MΩ internal pulldown, and logic thresholds are VIH = 1.4V and VIL = 0.4V - enabling direct interface with standard CMOS or LVCMOS clock sources without level-shifting.
How does the MAX25223ATPA/VY+T achieve 5µA quiescent current, and under what conditions is this value valid?
The MAX25223ATPA/VY+T achieves 5µA typical quiescent current in standby mode - defined as no-load operation with skip mode enabled and output voltage regulated at 5V. This occurs when the high-side FET remains off for eight consecutive clock cycles, disabling non-essential internal circuitry while retaining regulation capability. The 5µA value is specified for the 5V variant (MAX25223ATPA/VY+T) at TA = +25°C and is guaranteed over −40°C to +125°C per design characterization.
What protection features are integrated into the MAX25223ATPA/VY+T, and how do they behave during fault conditions?
The MAX25223ATPA/VY+T integrates overcurrent protection (4.7A peak limit), thermal shutdown (+175°C), hiccup-mode short-circuit response, output overvoltage protection (106% rising threshold), and 42V load-dump tolerance. During a short circuit, it disables switching for 7ms (2.1MHz) or 11ms (400kHz), then retries soft-start. If the fault persists, it repeats this cycle. Thermal shutdown includes 15°C hysteresis to prevent oscillation near the trip point.
Can the MAX25223ATPA/VY+T operate in dropout, and what is its minimum input voltage for 5V output regulation?
Yes, the MAX25223ATPA/VY+T operates in dropout by achieving up to 99% duty cycle, allowing regulation down to VIN ≈ VOUT + VDS(ON) × IOUT/VOUT. For 5V output at 3.5A, the practical minimum input is ~5.3V - verified by test data showing stable regulation at 5.2V input. Below this, the device maintains 99% duty cycle and tracks VIN minus conduction loss, with PGOOD asserting low if VOUT falls below 92% of nominal.
MAX25223ATPA/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):
- 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+T FAQ
1.How can I place an order for MAX25223ATPA/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25223ATPA/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 MAX25223ATPA/VY+T reliable?
The price and inventory of MAX25223ATPA/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 MAX25223ATPA/VY+T is usually 5 days.
3.What payment methods are accepted for MAX25223ATPA/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25223ATPA/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25223ATPA/VY+T?
MAX25223ATPA/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25223ATPA/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 MAX25223ATPA/VY+T?
For technical support, including MAX25223ATPA/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25223ATPA/VY+T requirements.
6.How does Aetrix verify that MAX25223ATPA/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX25223ATPA/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 MAX25223ATPA/VY+T meets industry standards.
7.What is the process for return or replacement of MAX25223ATPA/VY+T?
All MAX25223ATPA/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX25223ATPA/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 MAX25223ATPA/VY+T part is unused and in its original packaging.
Return procedure for MAX25223ATPA/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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