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Analog Devices Inc./Maxim Integrated MAX25276ATCA/VY+
- Part No.:
- MAX25276ATCA/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX25276ATCA/VY+.pdf
- Description:
- IC REG BUCK 3.3V/5V 1.2A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:513
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Product details
Overview
MAX25276ATCA/VY+ from Analog Devices is a 36V, 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 input-voltage tolerance and ultra-low IQ operation.
For engineers reviewing the MAX25276ATCA/VY+ datasheet, MAX25276ATCA/VY+ pinout, MAX25276ATCA/VY+ application, or MAX25276ATCA/VY+ equivalent, this page delivers verified technical context, validated pin functions, confirmed AEC-Q100 qualification, real-world EMI mitigation via spread-spectrum modulation, and precise 5.147V output specification per factory trim - all critical for automotive DC-DC design validation and BOM selection.
Technical Context
This device implements current-mode control with 20ns minimum on-time, enabling direct step-down from automotive battery (e.g., 12V/24V) to sub-3V rails without cascaded converters. Its 99% maximum duty cycle supports dropout operation during cold-crank conditions.
The IC integrates a 5V internal BIAS LDO, open-drain PGOOD monitoring, programmable spread-spectrum (±6% via SPS pin), and dual-mode operation (skip mode at light loads / forced PWM via SYNC pin) - all within a thermally enhanced 3mm × 3mm TDFN package with exposed pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.2A continuous - sufficient for powering ADAS sensors, infotainment SoCs, or CAN transceivers directly from 12V/24V battery. |
| Input Voltage Range | 3.5V to 36V, with 40V transient tolerance - meets ISO 7637-2 pulse 5a requirements for automotive load-dump immunity. |
| Output Voltage | Factory-trimmed 5.147V ±2% - matches precision reference needs for analog front-ends or ADC biasing in automotive ECUs. |
| Quiescent Current | 3.5µA at no load in standby - enables >10-year battery life in always-on vehicle modules (e.g., telematics, alarm systems). |
| Switching Frequency | 2.1MHz typical - allows use of compact 4.7µH inductors and ceramic capacitors, minimizing solution footprint and avoiding AM band interference. |
| Operating Temperature | −40°C to +125°C ambient - qualified per AEC-Q100 Grade 1, supporting under-hood and cabin-mounted applications. |
| Protection Features | Integrated overcurrent (1.9A typ), thermal shutdown (175°C), and 99% dropout operation - eliminates need for external fault-handling circuitry. |
Pinout & Package
MAX25276ATCA/VY+ uses a 12-pin side-wettable TDFN package (3mm × 3mm, outline 21-100176, land pattern 90-100072) with exposed thermal pad connected to PGND for enhanced heat dissipation in high-ambient automotive environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SPS | Spread-spectrum enable input | Logic-high enables ±6% frequency dithering to reduce peak EMI emissions; internal 1MΩ pulldown ensures default disable. |
| 2 EN | High-voltage enable input | Accepts 3.3V–36V logic; enables startup only when >2.4V; no internal pullup/pulldown preserves ultra-low IQ. |
| 3 BST | Bootstrap capacitor connection | Requires 0.1µF ceramic cap to LX; sustains gate drive for high-side FET during 99% duty-cycle dropout operation. |
| 4 SUP | Main input supply | 3.5V–36V input rail; requires 4.7µF ceramic decoupling to PGND near pin for transient stability. |
| 5 LX | Switch node | Connects to inductor; switches between SUP and PGND; internal clamp diodes protect against inductive kickback. |
| 6 PGND | Power ground return | Low-impedance path for high-current/high-frequency switching currents; must be solid copper plane under EP. |
| 7 AGND | Analog ground reference | Separate quiet ground for FB, PGOOD, SYNC, BIAS; routed separately from PGND to minimize noise coupling. |
| 8 FB | Feedback voltage sense | Internal 1.0V reference; connects to resistor divider for adjustable outputs or tied to BIAS for fixed 5.147V. |
| 9 OUT | Regulated output | Delivers 5.147V @ 1.2A; bypassed with 22µF ceramic cap to PGND; monitored by PGOOD for system sequencing. |
| 10 BIAS | Internal 5V LDO output | Supplies internal circuitry; requires ≥1µF ceramic cap to AGND; powers PGOOD pullup and SYNC/SPS logic. |
| 11 SYNC | Mode control / synchronization | Ground or open = skip mode; BIAS or external clock = forced PWM; internal 1MΩ pulldown sets default skip mode. |
| 12 PGOOD | Open-drain power-good signal | Active-high indicator asserting when VOUT ≥93.5% of nominal; requires external 20kΩ pullup to BIAS or system rail. |
| EP | Exposed thermal pad | Must be soldered to PCB ground plane; not electrically connected but critical for thermal resistance (θJC = 9°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck architecture | Integrated 300mΩ high-side and 200mΩ low-side MOSFETs eliminate external FETs and gate drivers, reducing BOM count and layout complexity. |
| Ultra-low quiescent current | 3.5µA standby IQ enables compliance with automotive OEM sleep-mode current budgets (<10µA) for body control modules and telematics. |
| 20ns minimum on-time | Enables direct 12V-to-1.8V or 24V-to-3.3V conversion without pre-regulator, cutting board space and cost in multi-rail systems. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with full electrical testing across temperature, ensuring reliability in engine bay and chassis applications. |
| Programmable spread spectrum | ±6% frequency modulation via SPS pin reduces radiated EMI peaks by up to 10dB, easing CISPR 25 Class 5 compliance without added shielding. |
| 99% duty-cycle dropout | Maintains regulation down to VIN = VOUT + 0.2V (e.g., 5.35V input for 5.147V output), supporting cold-crank operation in 12V vehicles. |
Applications
| Automotive Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera Power |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and LIN interface in BCM during vehicle sleep and ignition cycles. IC Role / Device Role / Timing Role: Primary 5.147V rail generator with ultra-low IQ and load-dump protection. Use Value: Enables <5µA system sleep current while maintaining fast wake-up response and surviving 40V transients. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view cameras mounted in exterior housings. IC Role / Device Role / Timing Role: High-efficiency 5.147V source with 2.1MHz switching to avoid interference with video clock domains. Use Value: Eliminates need for external EMI filters due to spread-spectrum modulation and small passive component size. |
| Automotive Infotainment Head Unit | Electric Power Steering (EPS) Control Unit |
Use Scenario: Generates clean 5.147V rail for audio codec, touch controller, and display timing ICs in head units. IC Role / Device Role / Timing Role: Low-noise, high-PSRR buck regulator with PGOOD sequencing for multi-rail power-up. Use Value: ±2% output accuracy ensures stable reference for audio DACs and prevents display flicker during battery voltage sag. |
Use Scenario: Provides isolated 5.147V supply for motor position sensing, torque feedback, and MCU in EPS systems. IC Role / Device Role / Timing Role: Robust DC-DC stage with 99% dropout and thermal shutdown for safety-critical power domain. Use Value: Maintains operation during cranking (6.5V min battery) and shuts down before junction exceeds 175°C under overload. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20076DATCA/V+ | Same 3.5V–36V input, 2.1MHz, 1.2A rating, but factory-trimmed to 5.0V ±2% instead of 5.147V; identical pinout and package. | Used where 5.0V rail is required for legacy MCU or peripheral compatibility; lacks precision match for 5.147V-referenced ADCs. | Select MAX20076DATCA/V+ only if system tolerates 5.0V nominal output and does not require 5.147V reference accuracy. |
| LM61480QRNXTQ1 | TI's AEC-Q100 Grade 1 3.5V–36V, 1.2A buck; 2.1MHz fixed freq; 5.0V fixed option; 4.5µA IQ; no spread-spectrum; different pinout (16-pin WQFN). | Offers higher thermal performance (θJA = 32°C/W) but requires PCB redesign; lacks SPS pin for EMI reduction. | Choose LM61480QRNXTQ1 only when board-level EMI filtering is already implemented and thermal margin is prioritized over layout reuse. |
Compared with MAX25276ATCA/VY+, MAX20076DATCA/V+ provides identical functionality at 5.0V but sacrifices 5.147V precision, while LM61480QRNXTQ1 trades spread-spectrum EMI control and pin compatibility for slightly better thermal metrics and TI ecosystem support.
Availability
MAX25276ATCA/VY+ is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera power supplies, and infotainment subsystems requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX25276ATCA/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 with precision power, sensing, and signal chain solutions.
MAX25276ATCA/VY+ belongs to the MAX2007x/MAX2527x family of automotive-grade buck converters engineered specifically for demanding 12V/24V vehicle electrical systems - emphasizing ultra-low IQ, wide VIN range, and robust transient immunity.
FAQ
What output voltage does the MAX25276ATCA/VY+ deliver?
The MAX25276ATCA/VY+ is factory-trimmed to deliver a precise 5.147V output with ±2% accuracy across temperature and line/load conditions. This value is internally set and requires no external resistor divider; FB must be connected to BIAS to activate the fixed output. It is distinct from the 5.0V variant (MAX20076DATCA/V+) and optimized for applications needing tight reference matching, such as high-resolution ADC biasing or sensor excitation.
Is the MAX25276ATCA/VY+ AEC-Q100 qualified?
Yes, the MAX25276ATCA/VY+ is fully qualified per AEC-Q100 Grade 1 standards, covering operating temperatures from −40°C to +125°C ambient, stress testing, and failure mechanism validation. This qualification is documented in the official Analog Devices datasheet (Rev 10, Jan 2023) and applies specifically to the MAX25276D series including the MAX25276ATCA/VY+ variant.
How does the MAX25276ATCA/VY+ achieve ultra-low quiescent current?
The MAX25276ATCA/VY+ achieves 3.5µA typical quiescent current by entering standby mode when no load is present and skip mode is active: internal high-voltage LDO is disabled, non-essential circuitry is powered down, and only core regulation blocks remain active. This behavior is confirmed in the Electrical Characteristics table (ISUP = 3.5µA, no load, no switching) and is specific to factory-trimmed 3.3V–5.5V output variants like MAX25276ATCA/VY+.
Can the MAX25276ATCA/VY+ operate during automotive cold-crank conditions?
Yes, the MAX25276ATCA/VY+ supports dropout operation down to 99% duty cycle, enabling regulation even when input voltage drops to ~5.35V for its 5.147V output - well within typical 12V vehicle cold-crank spec (6.0V min). The device maintains PGOOD assertion and continues switching at ~50kHz in dropout, as verified in the Detailed Description section of the datasheet.
Does the MAX25276ATCA/VY+ support spread-spectrum modulation?
Yes, the MAX25276ATCA/VY+ supports spread-spectrum frequency modulation via the SPS pin: pulling SPS high enables ±6% dithering around the nominal 2.1MHz switching frequency, reducing peak radiated EMI by up to 10dB. This feature is active only during internally generated oscillator operation (i.e., when SYNC is grounded or open) and is explicitly specified in the Electrical Characteristics table under "Spread-Spectrum Range".
MAX25276ATCA/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tray
- 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+ FAQ
1.How can I place an order for MAX25276ATCA/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25276ATCA/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 MAX25276ATCA/VY+ reliable?
The price and inventory of MAX25276ATCA/VY+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX25276ATCA/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25276ATCA/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25276ATCA/VY+?
MAX25276ATCA/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25276ATCA/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 MAX25276ATCA/VY+?
For technical support, including MAX25276ATCA/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25276ATCA/VY+ requirements.
6.How does Aetrix verify that MAX25276ATCA/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX25276ATCA/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 MAX25276ATCA/VY+ meets industry standards.
7.What is the process for return or replacement of MAX25276ATCA/VY+?
All MAX25276ATCA/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX25276ATCA/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 MAX25276ATCA/VY+ part is unused and in its original packaging.
Return procedure for MAX25276ATCA/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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