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Analog Devices Inc./Maxim Integrated MAX25320ATPA/VY+
- Part No.:
- MAX25320ATPA/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
MAX25320ATPA/VY+.pdf
- Description:
- IC REG BCK PROG 1A/1A DL 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:490
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Product details
Overview
MAX25320ATPA/VY+ from Analog Devices is a dual-channel, ASIL D-compliant buck converter delivering up to 1A per output with factory-preset voltages (0.5V–3.6V in two step resolutions), 2.1MHz fixed-frequency PWM/SKIP operation, and ±1% output voltage accuracy over load, line, and temperature. It operates from a 3.3V supply and targets safety-critical automotive SoC/MCU secondary regulation.
For engineers reviewing the MAX25320ATPA/VY+ datasheet, MAX25320ATPA/VY+ pinout, MAX25320ATPA/VY+ application, or MAX25320ATPA/VY+ equivalent, key selection factors include ASIL D compliance features (BIST, redundant reference, PEC on I²C), dual independent enable/RESET/INT signals, spread-spectrum oscillator, and 4mm × 4mm 20-pin TQFN packaging for space-constrained automotive power domains.
Technical Context
The MAX25320ATPA/VY+ integrates two synchronous buck regulators with peak current mode control, supporting independent PWM or SKIP mode operation at 2.1MHz. Each channel includes dedicated LX, PGND, EN, and VOUT pins, plus shared I²C (SCL/SDA), SYNC, RESET, and INT signals.
It implements MAXQ® power architecture for enhanced transient response and phase margin, alongside ASIL D–level diagnostics: built-in self-test (BIST), programmable OV/UV thresholds, redundant internal voltage reference, and packet error checking (PEC) on the I²C interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A per channel - supports dual-core SoC rail splitting or independent MCU core/logic supplies |
| Switching Frequency | 2.1MHz - enables all-ceramic output filter design and compact 1µH inductors |
| Output Voltage Range | 0.5V–1.59375V (6.25mV steps) and 1.6V–3.6V (25mV steps) - covers LPDDR4, Arm Cortex-A/R cores, and I/O rails |
| Output Accuracy | ±1% over load/line/temp - eliminates need for external 0.1% feedback resistors |
| Operating Temp | −40°C to +125°C ambient - qualified for under-hood automotive ECUs and ADAS domain controllers |
| Efficiency | Up to 91% @ 3.3V→1.8V - reduces thermal load in sealed enclosures |
| Compliance | AEC-Q100 Grade 0 & ASIL D compliant - meets ISO 26262 functional safety requirements for safety-critical power rails |
Pinout & Package
Package: 4mm × 4mm, 20-pin TQFN (exposed pad), RoHS-compliant, moisture sensitivity level (MSL) 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Input supply pin | 3.3V main input for internal LDOs, bias, and logic - requires local 2.2µF ceramic decoupling |
| EN1 / EN2/ADDR | Channel enable / I²C address select | EN1 controls OUT1; EN2/ADDR sets I²C slave address (low = 0x60, high = 0x61) |
| LX1 / LX2 | Power switch node | Connects to external 1µH inductor and sync rectifier FET - high dv/dt node requiring tight layout |
| PGND1 / PGND2 | Power ground return | Separate low-impedance paths for each channel's power loop - must connect to exposed pad under IC |
| VOUT1 / VOUT2 | Regulated output | Factory-programmed voltage - no external resistor divider needed; 10µF ceramic output capacitance recommended |
| SCL / SDA | I²C serial interface | Supports configuration, monitoring, and fault reporting with PEC-enabled packet integrity checking |
| RESET / INT | Open-drain status outputs | RESET asserts on UVLO/fault; INT signals interrupt events (OV, UV, OT, OC) - require pull-up resistors |
| SYNC | External clock synchronization input | Allows phase alignment with system clock or other converters to reduce EMI peaks |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN1 and EN2 allow staggered startup sequencing or dynamic channel disable for power gating |
| Factory-programmable soft-start & RESET delay | Eliminates need for external timing components; configurable via I²C after power-up |
| Spread-spectrum oscillator | Reduces peak radiated emissions by modulating switching frequency - aids CISPR 25 Class 5 compliance |
| Peak current mode architecture | Provides inherent cycle-by-cycle current limiting and fast transient response without external compensation |
| Redundant internal reference | Enables continuous monitoring of reference integrity - required for ASIL D diagnostic coverage |
| Built-in self-test (BIST) | Verifies critical analog blocks (reference, comparators, ADC) during startup and runtime - satisfies ISO 26262 FMEDA requirements |
Applications
| ADAS Domain Controller Power | Automotive Infotainment SoC Supply |
|---|---|
Use Scenario: Powering dual-core vision processor and ISP in front-camera ECU with strict EMI and safety requirements. IC Role / Device Role / Timing Role: Dual 1A buck regulator providing independent 1.1V core and 1.8V I/O rails with synchronized switching. Use Value: ASIL D diagnostics and spread-spectrum operation meet OEM EMC and functional safety mandates without added filtering or redundancy hardware. | Use Scenario: Regulating power for quad-core application processor and GPU in head-unit SoC with dynamic DVFS. IC Role / Device Role / Timing Role: Secondary regulator delivering tightly regulated, sequenced 0.825V and 1.1V rails with I²C-configurable soft-start and OV thresholds. Use Value: ±1% accuracy and factory presetting eliminate calibration overhead; 2.1MHz operation supports ultra-low-profile 1µH inductors in thin-form-factor designs. |
| Electric Power Steering (EPS) MCU Supply | Vehicle Gateway Microcontroller Supply |
Use Scenario: Supplying safety-critical MCU and CAN transceivers in EPS module operating at −40°C to +125°C. IC Role / Device Role / Timing Role: Dual buck converter generating 3.3V logic and 1.2V core rails with BIST-enabled health monitoring and overtemperature shutdown. Use Value: AEC-Q100 Grade 0 qualification and redundant reference ensure uninterrupted operation during thermal stress events. | Use Scenario: Powering multi-protocol gateway MCU (CAN FD, LIN, Ethernet) requiring isolated, glitch-free reset signaling. IC Role / Device Role / Timing Role: Dual regulator with independent RESET and INT open-drain outputs for coordinated system-level fault handling. Use Value: Dedicated RESET assertion on UVLO and INT signaling of OV/OC faults enable deterministic fail-safe state transitions per ISO 26262. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS653221A-Q1 | Single 2A buck + LDO; no dual independent 1A outputs; lacks spread-spectrum and BIST | Targeted at MCU-only systems without dual-rail SoC loads | Choose when only one high-current rail is needed and ASIL D diagnostics are not required |
| MPQ4482-AEC1 | Dual 1.2A buck; no I²C interface, no BIST, no PEC, no redundant reference; AEC-Q100 Grade 1 only | Cost-sensitive ADAS camera modules with lower safety tier requirements | Choose when functional safety certification is not mandated and configurability is secondary to cost |
Compared with TPS653221A-Q1 and MPQ4482-AEC1, the MAX25320ATPA/VY+ uniquely delivers dual independent 1A outputs with full ASIL D compliance-including BIST, redundant reference, and PEC-enabling single-chip safety-certified power for complex automotive SoCs without external monitoring circuitry.
Availability
MAX25320ATPA/VY+ is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment SoC power delivery, electric power steering ECUs, and vehicle gateway modules requiring stable component supply across extended temperature and safety-critical environments.
Supply support for MAX25320ATPA/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.
The MAX25320ATPA/VY+ belongs to Analog Devices' automotive-grade power management portfolio, designed specifically for ASIL D–compliant, dual-rail point-of-load regulation in next-generation automotive compute platforms.
FAQ
What is the maximum output current per channel for the MAX25320ATPA/VY+?
The MAX25320ATPA/VY+ delivers up to 1A of continuous output current per channel under thermal and voltage conditions specified in the datasheet. This rating assumes proper PCB layout, adequate copper area for the exposed pad, and operation within the −40°C to +125°C ambient temperature range. Derating applies above +85°C ambient, and both channels can operate simultaneously at full load if thermal design permits.
Does the MAX25320ATPA/VY+ require external feedback resistors to set output voltage?
No, the MAX25320ATPA/VY+ does not require external feedback resistors. Its output voltages are factory-preset with ±1% accuracy across load, line, and temperature. This eliminates the need for precision 0.1% resistors and associated layout complexity, reducing BOM count and improving long-term stability in automotive applications.
How does the MAX25320ATPA/VY+ support functional safety compliance?
The MAX25320ATPA/VY+ supports ASIL D compliance through integrated features including built-in self-test (BIST), redundant internal voltage reference, programmable OV/UV thresholds, and packet error checking (PEC) on its I²C interface. These capabilities satisfy ISO 26262 diagnostic coverage requirements for safety-critical power rails without external monitoring circuitry.
What package type and pin count does the MAX25320ATPA/VY+ use?
The MAX25320ATPA/VY+ uses a 4mm × 4mm, 20-pin TQFN package with an exposed thermal pad. This compact footprint supports high-density automotive PCB layouts while enabling efficient heat dissipation. The pinout includes dual LX/PGND/VOUT paths, independent enable inputs, and shared I²C, RESET, INT, and SYNC signals - all documented in the official Analog Devices datasheet Rev 2.
Can the MAX25320ATPA/VY+ operate in both PWM and SKIP modes?
Yes, the MAX25320ATPA/VY+ supports both fixed-frequency PWM mode and SKIP mode operation at 2.1MHz. SKIP mode improves light-load efficiency by skipping switching cycles, while PWM ensures constant frequency for predictable EMI filtering. Mode selection is configurable via I²C register settings, allowing dynamic adaptation to load conditions in automotive SoC applications.
MAX25320ATPA/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- 3.3V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 3.6V
- Current - Output:
- 1A, 1A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-TQFN-EP (4x4)
MAX25320ATPA/VY+ FAQ
1.How can I place an order for MAX25320ATPA/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25320ATPA/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 MAX25320ATPA/VY+ reliable?
The price and inventory of MAX25320ATPA/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX25320ATPA/VY+ is usually 5 days.
3.What payment methods are accepted for MAX25320ATPA/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25320ATPA/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25320ATPA/VY+?
MAX25320ATPA/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25320ATPA/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 MAX25320ATPA/VY+?
For technical support, including MAX25320ATPA/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25320ATPA/VY+ requirements.
6.How does Aetrix verify that MAX25320ATPA/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX25320ATPA/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 MAX25320ATPA/VY+ meets industry standards.
7.What is the process for return or replacement of MAX25320ATPA/VY+?
All MAX25320ATPA/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX25320ATPA/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 MAX25320ATPA/VY+ part is unused and in its original packaging.
Return procedure for MAX25320ATPA/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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