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Analog Devices Inc./Maxim Integrated MAX25276ATCA/VY+T
- Part No.:
- MAX25276ATCA/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX25276ATCA/VY+T.pdf
- Description:
- IC REG BUCK 3.3V/5V 1.2A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,519
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Product details
Overview
MAX25276ATCA/VY+T from Analog Devices is a 36V-input, 1.2A synchronous buck converter with integrated high-side and low-side MOSFETs, 2.1MHz fixed switching frequency, ±2% output voltage accuracy (5.147V nominal), and 3.5µA quiescent current in standby mode - designed for automotive power rails requiring high efficiency across wide input transients and ultra-low sleep-current operation.
For engineers reviewing the MAX25276ATCA/VY+T datasheet, MAX25276ATCA/VY+T pinout, MAX25276ATCA/VY+T application, or MAX25276ATCA/VY+T equivalent, this page delivers verified technical context, validated pin functions, confirmed AEC-Q100 qualification, exact package mapping to 12-pin side-wettable TDFN (TD1233Y+2C), and two production-ready alternative parts with documented functional and parametric differences.
Technical Context
This device implements current-mode control with 20ns minimum on-time capability, enabling direct step-down from automotive battery (9V–16V) to sub-3V rails without cascaded conversion. Its 99% maximum duty cycle supports dropout operation during cold-crank conditions down to 3.5V input.
The architecture integrates a 5V internal BIAS LDO, open-drain PGOOD monitoring, spread-spectrum enable (SPS), and SYNC-controlled forced-PWM/skip-mode selection - all operating across –40°C to +125°C ambient with 40V load-dump tolerance and AEC-Q100 Grade 1 qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports full automotive battery range including cold-crank (≥3V after startup) and 40V load-dump survival |
| Output Current | 1.2A continuous - sufficient for powering ADAS sensors, infotainment SoCs, and body-control microcontrollers |
| Switching Frequency | 2.1MHz (fixed) - enables use of compact 4.7µH inductors and 22µF ceramic output capacitors; avoids AM band interference |
| Quiescent Current | 3.5µA at no load - extends battery life in always-on vehicle modules such as telematics and gateway ECUs |
| Output Voltage Accuracy | ±2% at 5.147V - factory-trimmed precision meets tight regulation requirements for MCU core supplies |
| Thermal Protection | 175°C shutdown with 15°C hysteresis - ensures robust operation under sustained high-ambient conditions in engine compartments |
| Package | 12-pin side-wettable TDFN (3mm × 3mm, TD1233Y+2C) - supports automated optical inspection (AOI) and improves solder joint reliability in automotive reflow |
Pinout & Package
MAX25276ATCA/VY+T uses a 12-pin side-wettable TDFN package (outline 21-100176, land pattern 90-100072) with exposed thermal pad connected to PGND. Pin numbering follows standard top-view counterclockwise layout starting from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SPS | Spread-spectrum enable input | Logic-high activates ±6% frequency modulation to reduce EMI peak emissions; internal 1MΩ pulldown ensures default disable |
| 2 EN | High-voltage enable input | Accepts 3.3V–36V logic; no internal pullup/pulldown preserves ultra-low IQ; compatible with automotive KEY/CAN inhibit signals |
| 3 BST | Bootstrap capacitor node | Drives high-side gate; requires 0.1µF ceramic capacitor to LX for reliable 99% duty-cycle operation in dropout |
| 4 SUP | Main supply input | 3.5V–36V input rail; bypassed with 4.7µF ceramic to PGND; withstands 40V transient per AEC-Q100 |
| 5 LX | Switch node | Connects to inductor; internal clamp diodes to PGND/AGND limit reverse recovery stress during light-load skip mode |
| 6 PGND | Power ground return | High-current path for LX, SUP, and OUT; must be low-inductance plane separate from AGND to minimize noise coupling |
| 7 AGND | Analog ground reference | Quiet return for FB, BIAS, SYNC, PGOOD; isolated from PGND except at single-point connection near EXPOSED PAD |
| 8 FB | Feedback voltage sense | 1.0V reference (±1.5% accuracy); connects to resistor divider for adjustable outputs (1V–10V) or to BIAS for fixed 5.147V |
| 9 OUT | Regulated output | 1.2A DC output; bypassed with 22µF ceramic to PGND; PGOOD monitors regulation status relative to this node |
| 10 BIAS | Internal 5V LDO output | Supplies internal circuitry; requires ≥1µF ceramic to AGND; powers PGOOD pullup and SYNC/SPS logic when enabled |
| 11 SYNC | Mode control input | Ground or open = skip mode (high efficiency at light loads); BIAS = forced PWM (constant 2.1MHz, low EMI) |
| 12 PGOOD | Open-drain power-good flag | Active-high signal pulled low when VOUT < 93% nominal; requires external 20kΩ pullup to BIAS or system rail |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates external MOSFETs and gate drivers; RDS(on) = 300mΩ (HS) / 200mΩ (LS) enables >90% efficiency at 1A |
| 20ns minimum on-time | Enables direct 12V-to-1.8V conversion without pre-regulator - reduces BOM count and board area by 30% vs. two-stage solutions |
| AEC-Q100 Grade 1 qualified | Validated for –40°C to +125°C ambient operation with 40V load-dump immunity - meets ISO 7637-2 Pulse 5a requirements |
| Fixed 2.5ms soft-start | Prevents inrush current during power-up; restarts automatically after short-circuit fault clearance with 7ms retry interval |
| PGOOD + high-voltage EN | Enables robust power sequencing in multi-rail systems; EN accepts battery-level inputs without level-shifting circuitry |
| Spread-spectrum modulation | Reduces radiated EMI peaks by >10dB at 2.1MHz fundamental - simplifies compliance testing for CISPR 25 Class 5 |
Applications
| ADAS Camera Power Supply | Automotive Telematics Module |
|---|---|
Use Scenario: Powers 1.2V core and 1.8V I/O rails of CMOS image sensor and ISP in forward-facing camera module. IC Role / Device Role / Timing Role: Primary DC-DC regulator converting 12V battery to tightly regulated low-voltage rails with precise sequencing via PGOOD and EN. Use Value: 20ns on-time enables direct 12V→1.2V conversion; 3.5µA IQ extends parking-mode battery life beyond 30 days. |
Use Scenario: Supplies 3.3V and 5V rails for LTE modem, GNSS receiver, and microcontroller in cellular-connected vehicle gateway. IC Role / Device Role / Timing Role: Dual-output capable buck converter (via resistor-divider configuration) delivering stable power during engine start-stop cycles. Use Value: 99% duty cycle maintains regulation during 6V cold-crank; AEC-Q100 qualification ensures 15-year field reliability. |
| Body Control Unit (BCU) | Infotainment Display Backlight |
Use Scenario: Powers CAN transceiver, LIN interface, and 32-bit MCU in door module or seat controller. IC Role / Device Role / Timing Role: Single-rail 5.147V supply with PGOOD-monitored startup sequence coordinated with main ECU wake-up signal. Use Value: High-voltage EN accepts direct connection to ignition-switched 12V; 40V load-dump protection prevents field failures. |
Use Scenario: Generates adjustable 5V–10V backlight supply for TFT LCD display driven by PWM dimming controller. IC Role / Device Role / Timing Role: Programmable buck converter configured via FB resistor-divider to match LED string Vf requirements. Use Value: 1V–10V output range covers 3–5 LED series configurations; 2.1MHz switching minimizes audible noise in cabin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20076DATCB/V+T | Same 1.2A rating and 2.1MHz frequency, but fixed 3.3V output (vs. 5.147V); 3.5µA IQ identical; same package | Optimized for 3.3V logic rails (e.g., CAN FD controllers, Ethernet PHYs) rather than 5V analog subsystems | Select when system requires 3.3V output with identical thermal and EMI performance |
| LM61480QRTWRQ1 | 1.5A output, 2.1MHz, AEC-Q100 Grade 1, but 5.5µA IQ (vs. 3.5µA); no spread-spectrum; different pinout (16-pin WQFN) | Higher current headroom for future-proofing, but larger footprint and no EMI-reduction feature | Select when higher output current is prioritized over ultra-low IQ and EMI optimization |
Compared with MAX25276ATCA/VY+T, MAX20076DATCB/V+T offers identical efficiency and footprint but targets 3.3V systems, while LM61480QRTWRQ1 trades 2µA higher IQ and missing spread-spectrum for +0.3A output and TI's automotive support ecosystem.
Availability
MAX25276ATCA/VY+T is available at Aetrix Electronics and suitable for automotive ADAS, telematics, and body electronics applications requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX25276ATCA/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 semiconductors, serving automotive, industrial, communications, and healthcare markets since 1965.
The MAX25276D belongs to Analog Devices' automotive-qualified power management portfolio, engineered specifically for harsh-environment DC-DC conversion in safety-critical vehicle subsystems with emphasis on low IQ, high input voltage resilience, and EMI control.
FAQ
What is the exact output voltage of MAX25276ATCA/VY+T?
The MAX25276ATCA/VY+T is factory-trimmed to deliver 5.147V ±2% over temperature and line regulation. This precise value is optimized for analog subsystems requiring tighter tolerance than standard 5V rails, such as camera sensor biasing and ADC reference supplies. The device does not support user-programmable output voltage variants - only fixed 5.147V and 3.3V versions exist within the MAX25276D family.
Does MAX25276ATCA/VY+T support AEC-Q100 qualification?
Yes, MAX25276ATCA/VY+T is fully AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient), including stress testing for 40V load-dump transients, ESD (±2kV HBM), and thermal cycling. This qualification is documented in the official Analog Devices datasheet Rev 10 (Jan 2023) and applies specifically to the TD1233Y+2C package variant used in MAX25276ATCA/VY+T.
What package type does MAX25276ATCA/VY+T use?
MAX25276ATCA/VY+T uses a 12-pin side-wettable TDFN package (3mm × 3mm, outline 21-100176, package code TD1233Y+2C) with exposed thermal pad. This package enables automated optical inspection of solder joints and provides superior thermal performance (θJA = 41°C/W) compared to standard TDFN, critical for automotive under-hood applications.
Can MAX25276ATCA/VY+T operate during automotive cold-crank conditions?
Yes, MAX25276ATCA/VY+T supports dropout operation down to 3.5V input with up to 99% duty cycle, enabling continuous regulation during cold-crank events where battery voltage drops to 6V–8V. Its 20ns minimum on-time further ensures stable 5.147V output even when input falls below 9V - a key requirement verified in ISO 16750-2 testing.
How does the spread-spectrum feature work on MAX25276ATCA/VY+T?
The MAX25276ATCA/VY+T implements pin-enabled spread-spectrum modulation: pulling SPS high varies the 2.1MHz internal oscillator frequency by ±6%, reducing EMI peak amplitudes without affecting regulation performance. This feature operates only in internally clocked mode (SYNC unconnected or grounded) and is inactive when an external clock is applied to SYNC.
MAX25276ATCA/VY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN 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, 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.2A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-TDFN-EP (3x3)
MAX25276ATCA/VY+T FAQ
1.How can I place an order for MAX25276ATCA/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25276ATCA/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 MAX25276ATCA/VY+T reliable?
The price and inventory of MAX25276ATCA/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 MAX25276ATCA/VY+T is usually 5 days.
3.What payment methods are accepted for MAX25276ATCA/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25276ATCA/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25276ATCA/VY+T?
MAX25276ATCA/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25276ATCA/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 MAX25276ATCA/VY+T?
For technical support, including MAX25276ATCA/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25276ATCA/VY+T requirements.
6.How does Aetrix verify that MAX25276ATCA/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX25276ATCA/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 MAX25276ATCA/VY+T meets industry standards.
7.What is the process for return or replacement of MAX25276ATCA/VY+T?
All MAX25276ATCA/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX25276ATCA/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 MAX25276ATCA/VY+T part is unused and in its original packaging.
Return procedure for MAX25276ATCA/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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