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Analog Devices Inc./Maxim Integrated MAX25223ATPB/VY+
- Part No.:
- MAX25223ATPB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX25223ATPB/VY+.pdf
- Description:
- IC REG BUCK 3.3V 3.5A 20SWTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,042
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Product details
Overview
MAX25223ATPB/VY+ 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+ datasheet, MAX25223ATPB/VY+ pinout, MAX25223ATPB/VY+ application, or MAX25223ATPB/VY+ equivalent, key selection criteria include its 42V load-dump tolerance, 99% dropout duty cycle, PGOOD monitoring, spread-spectrum EMI reduction, and side-wettable 20-pin TQFN package optimized for thermal and noise performance in space-constrained automotive modules.
Technical Context
The MAX25223ATPB/VY+ employs current-mode control with internal slope compensation and no external compensation required. Its 65ns minimum on-time enables high step-down ratios (e.g., 24V→5V at 2.1MHz), while the 99% maximum duty cycle supports operation near VIN = VOUT during cold-crank conditions.
It integrates dual gate drivers, a 5V BIAS LDO, and programmable UVLO via EN resistor divider. The device auto-selects skip mode below ~600mA load (5µA IQ) or forced PWM mode when SYNC is tied to BIAS - enabling precise EMI management without sacrificing light-load efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3.5A continuous - supports automotive infotainment, ADAS sensors, and body control modules without external FETs |
| Input Voltage Range | 3V to 36V - covers full automotive battery range including cold-crank (4.5V) and load-dump (42V transient tolerant) |
| Quiescent Current | 5µA at no load - extends battery life in always-on vehicle systems like telematics and alarm controllers |
| Switching Frequency | 2.1MHz (fixed) - enables use of compact 2.2µH inductors and reduces AM-band interference |
| Output Accuracy | ±2% over +6V to +18V input - ensures stable 5V rail for MCU, CAN transceivers, and image sensors |
| PGOOD Thresholds | 92% UV / 106% OV detection - provides reliable power sequencing and fault signaling for downstream logic |
| Thermal Protection | 175°C shutdown with 15°C hysteresis - prevents thermal runaway during sustained overload or poor heatsinking |
Pinout & Package
The MAX25223ATPB/VY+ is housed in a 4mm × 4mm, 20-pin side-wettable TQFN package (package code T2044Y+5C) with exposed thermal pad. Pin layout is symmetrical to minimize EMI loop area and supports dual-input-capacitor placement for field cancellation.
| 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 signals; no internal pullup/pulldown |
| BST (Pin 2) | Bootstrap supply for high-side driver | Requires 0.1µF ceramic capacitor to LX; enables efficient 100% duty-cycle operation in dropout |
| SUP (Pins 4,5,11) | Main input supply connection | Three parallel inputs reduce AC current path impedance; each requires local 4.7µF ceramic decoupling |
| LX (Pins 8,9) | Switch node | Connects to inductor; internal clamp diodes to PGND/AGND limit reverse recovery stress during startup |
| BIAS (Pin 15) | Internal 5V LDO output | Powers internal circuitry; requires ≥1µF ceramic bypass to PGND; supplies PGOOD pullup when used |
| SYNC (Pin 17) | Mode control / clock sync input | Ground = skip mode; BIAS = forced PWM; enables dynamic EMI optimization without firmware change |
| PGOOD (Pin 18) | Open-drain power-good indicator | Active-high signal with 92–106% window; requires external 10kΩ pullup; debounced per switching mode |
| SPS (Pin 20) | Spread-spectrum enable | Logic-high enables ±6% frequency modulation - reduces peak EMI by >10dB without affecting regulation |
| PGND (Pins 7,10,16,19) | Power ground return | Multiple low-inductance paths minimize ground bounce; must be shorted to AGND via thick trace |
| AGND (Pin 13) | Analog ground reference | Reference for FB, error amplifier, and current sense; connects directly to exposed thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates 4 external MOSFETs and gate drivers - reduces BOM count, PCB area, and layout complexity |
| 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 solder-joint inspection (AOI) for automotive production line traceability |
| Programmable UVLO via EN divider | Allows custom start-up voltage (e.g., 6.5V) to prevent brownout during engine cranking |
| Internal soft-start (3.5ms) | Prevents inrush current into bulk capacitors - avoids fuse blowing and input voltage sag in multi-rail systems |
| Hiccup-mode short-circuit protection | Shuts down for 7ms then retries soft-start - protects against sustained shorts without latch-off or manual reset |
Applications
| Automotive Infotainment Power Supply | ADAS Camera Module DC-DC |
|---|---|
Use Scenario: Powers SoC, display interface, and audio codec in head-unit with wide input voltage variation during engine start/stop cycles. IC Role / Device Role / Timing Role: Primary 5V buck regulator with PGOOD sequencing and load-dump immunity. Use Value: Maintains uninterrupted operation during 4.5V cold-crank dips and rejects 42V transients - eliminates need for upstream TVS or secondary regulators. |
Use Scenario: Supplies 5V to CMOS image sensor and ISP in forward-facing camera with strict EMI limits for radar coexistence. IC Role / Device Role / Timing Role: Low-noise, spread-spectrum-enabled buck converter synchronized to system clock via SYNC pin. Use Value: ±6% frequency modulation lowers radiated emissions by >10dB at 100MHz - meets CISPR 25 Class 5 requirements without shielding. |
| Body Control Module (BCM) Core Rail | Telematics Control Unit (TCU) Always-On Supply |
Use Scenario: Provides 5V core power to microcontroller and LIN/CAN transceivers in door module with extended temperature exposure. IC Role / Device Role / Timing Role: AEC-Q100 Grade 1 buck converter operating from -40°C to +125°C ambient. Use Value: 5µA quiescent current minimizes parasitic drain - supports >10-year battery life in parked vehicle state. |
Use Scenario: Delivers always-on 5V rail to cellular modem and GNSS receiver in connected car gateway with wake-on-LIN capability. IC Role / Device Role / Timing Role: Ultra-low-IQ buck with programmable UVLO and PGOOD supervision for safe wake-up sequencing. Use Value: Internal 2.73V UVLO threshold and EN resistor divider allow precise undervoltage lockout at 6.2V - prevents erratic modem behavior during weak battery conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRTWRQ1 | 4.5V–36V input, 8A output, 2.1MHz, but 15µA IQ and no spread spectrum | Better for higher-current clusters; lacks EMI-optimized modulation and side-wettable package | Choose when >5A output or lower RDS(on) is required; avoid if CISPR 25 Class 5 compliance is mandatory |
| TPS62933RTER | 3V–36V input, 3.5A, 1.8MHz, 1.2µA IQ, but not AEC-Q100 qualified and no 42V transient rating | Optimized for ultra-low-power industrial IoT; lacks automotive safety and ruggedness features | Consider only for non-automotive applications where AEC-Q100 and load-dump immunity are unnecessary |
Compared with LM61480QRTWRQ1 and TPS62933RTER, the MAX25223ATPB/VY+ uniquely combines AEC-Q100 Grade 1 qualification, 42V transient tolerance, side-wettable packaging for AOI, and hardware-enabled spread-spectrum EMI reduction - making it the only drop-in solution for cost-sensitive, space-constrained automotive 5V rails requiring zero-layout redesign.
Availability
MAX25223ATPB/VY+ is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MAX25223ATPB/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, communications, and healthcare markets with precision power, sensing, and connectivity solutions.
The MAX25223ATPB/VY+ belongs to Analog Devices' automotive power management portfolio, designed specifically for robust, low-EMI DC-DC conversion in harsh vehicle environments - emphasizing reliability, thermal resilience, and regulatory compliance over generic efficiency metrics.
FAQ
What is the exact output voltage setting for MAX25223ATPB/VY+?
The MAX25223ATPB/VY+ is factory-trimmed to deliver a fixed 5V output with ±2% accuracy across the +6V to +18V input range and -40°C to +125°C ambient temperature. This value is laser-trimmed during production and does not require external feedback resistors - ensuring consistent regulation without calibration overhead in automotive ECUs.
Does MAX25223ATPB/VY+ support external synchronization?
Yes, MAX25223ATPB/VY+ supports external clock synchronization via the SYNC pin. When driven with a clean 1.7–2.6MHz (for 2.1MHz option) or 325–500kHz (for 400kHz option) square wave, the device locks its internal oscillator to the external source - enabling deterministic EMI reduction and system-level timing alignment in multi-converter designs.
How does the PGOOD function behave during input transients?
During input transients such as load dump or cold crank, MAX25223ATPB/VY+ maintains PGOOD assertion as long as the output remains within 92–106% of 5V. Its internal OV/UV comparators feature hysteresis and debounce times (60–110µs depending on mode), preventing false toggling during fast-rising/falling output excursions caused by transient-induced overshoot or undershoot.
Can MAX25223ATPB/VY+ operate in dropout with 100% duty cycle?
MAX25223ATPB/VY+ achieves up to 99% duty cycle in dropout - sufficient to sustain 5V output down to ~5.05V input. It cannot reach true 100% due to bootstrap capacitor recharge requirements; however, the internal 20µs forced LSFET conduction ensures stable regulation even at VIN = VOUT + 50mV, meeting automotive cold-crank specifications.
What thermal derating applies to MAX25223ATPB/VY+ in a four-layer PCB?
On a standard four-layer board with 2oz copper and 6x6cm thermal pad, MAX25223ATPB/VY+ has θJA = 33°C/W. At 70°C ambient, maximum continuous power dissipation is 2.42W before thermal shutdown activates at 175°C junction temperature - supporting 3.5A output at 5V with <1.5W total losses under typical conditions.
MAX25223ATPB/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):
- 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+ FAQ
1.How can I place an order for MAX25223ATPB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25223ATPB/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 MAX25223ATPB/VY+ reliable?
The price and inventory of MAX25223ATPB/VY+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX25223ATPB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25223ATPB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25223ATPB/VY+?
MAX25223ATPB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25223ATPB/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 MAX25223ATPB/VY+?
For technical support, including MAX25223ATPB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25223ATPB/VY+ requirements.
6.How does Aetrix verify that MAX25223ATPB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX25223ATPB/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 MAX25223ATPB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX25223ATPB/VY+?
All MAX25223ATPB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX25223ATPB/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 MAX25223ATPB/VY+ part is unused and in its original packaging.
Return procedure for MAX25223ATPB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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