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Analog Devices Inc./Maxim Integrated MAX20077ATCE2/VY+
- Part No.:
- MAX20077ATCE2/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20077ATCE2/VY+.pdf
- Description:
- IC REG BUCK ADJ 2.5A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:365
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Product details
Overview
MAX20077ATCE2/VY+ from Analog Devices is a synchronous buck converter IC with integrated high-side and low-side MOSFETs, delivering up to 2.5A output current at 3.3V or 5V fixed outputs (±2% accuracy in FPWM mode), operating from 3.5V–36V input, featuring 400kHz switching frequency, 3.5µA quiescent current at no load, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX20077ATCE2/VY+ datasheet, MAX20077ATCE2/VY+ pinout, MAX20077ATCE2/VY+ application, or MAX20077ATCE2/VY+ equivalent, key selection considerations include its 400kHz/2.1MHz dual-frequency option, 99% dropout duty cycle, spread-spectrum EMI reduction, PGOOD monitoring, and support for >60μF effective output capacitance in high-reliability automotive DC-DC conversion.
Technical Context
The MAX20077ATCE2/VY+ implements current-mode control with internal compensation, enabling stable regulation without external loop components. Its 400kHz fixed-frequency operation minimizes switching losses and maximizes efficiency under medium-to-heavy loads, while skip-mode activation below ~600mA ensures ultra-low 3.5µA standby IQ.
Designed for automotive environments, it integrates 40V load-dump protection, thermal shutdown at 175°C (15°C hysteresis), and operates across –40°C to +125°C ambient. The device supports forced PWM (FPWM) via SYNC pin biasing and features programmable soft-start (5.5–7.5ms) and ±3% spread-spectrum modulation on the 400kHz base frequency when SPS is asserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2.5A continuous - supports automotive infotainment and ADAS subsystems requiring robust single-stage 3.3V/5V rails. |
| Input Voltage Range | 3.5V to 36V - accommodates cold-crank (4.5V) and load-dump (40V transient) conditions per ISO 7637-2. |
| Switching Frequency | 400kHz (typ) - enables use of larger, lower-cost inductors (e.g., 10µH) and reduces core loss vs. 2.1MHz variants. |
| Quiescent Current | 3.5µA at no load - extends battery life in always-on vehicle modules (e.g., telematics, gateway ECUs). |
| Output Accuracy | ±2% in FPWM mode (5V/3.3V) - ensures reliable logic-level compliance for microcontrollers and sensors. |
| Duty Cycle Max | 99% - sustains regulation during deep dropout (e.g., 5.5VIN → 5VOUT), eliminating need for pre-regulator stages. |
| Thermal Protection | 175°C shutdown with 15°C hysteresis - prevents latch-up during sustained overload or poor PCB heatsinking. |
Pinout & Package
MAX20077ATCE2/VY+ is housed in a 3mm × 3mm, 12-pin side-wettable TDFN package (TD1233Y+2C) with exposed thermal pad connected to PGND for enhanced thermal performance (θJA = 41°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SPS | Spread-spectrum enable | Logic-high activates ±3% frequency dithering to reduce peak EMI emissions; internal 1MΩ pulldown ensures default disable. |
| EN | High-voltage enable input | Accepts 3.3V–40V logic; enables full operation when pulled above 2.4V; zero static current draw simplifies MCU/CAN-controlled sequencing. |
| BST | Bootstrap supply for HS gate driver | Requires 0.1µF ceramic capacitor to LX; enables efficient high-side FET drive without external charge pump. |
| SUP | Main power input | 3.5V–36V supply rail; requires 4.7µF ceramic bypass to PGND to stabilize internal bias generation and UVLO. |
| LX | Switch node | Connects to inductor; high dv/dt node requiring tight layout; internal clamp diodes protect against PGND/SUP overvoltage. |
| PGND | Power ground return | Low-impedance path for inductor current and switching transients; must be separated from AGND to avoid noise coupling. |
| AGND | Analog ground reference | Reference for FB, PGOOD, and internal error amplifier; connects to system ground only at single point near BIAS capacitor. |
| FB | Voltage feedback input | 1.0V reference (±1.5% accuracy); used with resistor divider for 1V–10V adjustable outputs or tied to BIAS for fixed 3.3V/5V. |
| OUT | Regulated output sense | Connects to output capacitor bank; voltage sensed at this node determines regulation; bypass with ≥44µF effective capacitance per datasheet. |
| BIAS | Internal 5V bias supply | Provides regulated 5V for internal circuitry and external pullups (e.g., PGOOD); requires ≥1µF ceramic to AGND. |
| SYNC | Mode control / synchronization | Ground or open = skip mode; tied to BIAS = forced PWM; accepts external clock (325–500kHz) for precise timing alignment. |
| PGOOD | Open-drain power-good indicator | Asserts high when VOUT ≥93% nominal; deasserts at ≤92%; requires external 20kΩ pullup to BIAS or system rail. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck architecture | Integrated 70mΩ/70mΩ HS/LS FETs eliminate external MOSFETs and drivers, reducing BOM count and PCB area by >30% vs. controller-based solutions. |
| Ultra-low quiescent current | 3.5µA at no load in skip mode - enables >10-year battery standby in always-on automotive modules without compromising startup time. |
| Automotive-grade reliability | AEC-Q100 Grade 1 (–40°C to +125°C), 40V load-dump tolerance, and thermal shutdown ensure functional safety in harsh under-hood environments. |
| EMI-optimized operation | 400kHz fixed frequency + optional ±3% spread spectrum reduces radiated emissions by >10dB in critical 150kHz–30MHz bands per CISPR 25 Class 5. |
| Flexible output configuration | Factory-trimmed 3.3V/5V outputs or 1V–10V programmable via FB resistor divider - supports diverse SoC, MCU, and sensor rail requirements. |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
Use Scenario: Providing clean, regulated 3.3V power to display controllers and audio codecs in head units with wide input voltage swings. IC Role / Device Role / Timing Role: Primary DC-DC regulator converting 9V–16V battery to stable 3.3V at up to 2.5A with <1% ripple. Use Value: 400kHz operation allows use of cost-effective 10µH inductors; PGOOD enables safe boot sequencing before processor initialization. | Use Scenario: Powering image signal processors (ISPs) and CMOS sensors in forward-facing cameras subject to engine-off battery drain. IC Role / Device Role / Timing Role: Always-on buck converter maintaining 5V rail during key-off, with ultra-low 3.5µA IQ preserving battery charge. Use Value: 99% dropout capability sustains 5V output down to 5.5V input during cold-crank; AEC-Q100 qualification ensures long-term field reliability. |
| Telematics Control Unit (TCU) | Automotive Gateway ECU |
Use Scenario: Generating isolated 5V for cellular modems and GNSS receivers in connected vehicle platforms with stringent EMI limits. IC Role / Device Role / Timing Role: EMI-optimized regulator using spread-spectrum modulation and FPWM mode to meet CISPR 25 Class 5 radiated emissions. Use Value: ±3% frequency dithering lowers peak spectral energy by >10dB; SYNC pin enables dynamic mode switching during data bursts. | Use Scenario: Supplying 3.3V to CAN FD transceivers and microcontrollers in multi-bus gateways requiring high immunity to load-dump transients. IC Role / Device Role / Timing Role: High-input-voltage buck converter with 40V transient tolerance and fast PGOOD assertion for fail-safe power management. Use Value: Integrated 40V load-dump protection eliminates need for external TVS; thermal shutdown prevents damage during CAN bus fault 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 |
|---|---|---|---|
| MAX20077ATCD2/VY+ | Same 400kHz frequency and 2.5A rating, but rated for >60μF output capacitance (vs. >80μF for ATCE2/VY+); slightly lower current-limit threshold (4.1–5.3A vs. 4.7A typ). | Optimized for mid-capacitance designs (60–80μF); less margin for ultra-low-ripple applications requiring >80μF. | Select MAX20077ATCD2/VY+ when total output capacitance is 60–80μF and cost optimization is prioritized over maximum ripple suppression. |
| LM61480QRTWRQ1 | 400kHz fixed-frequency buck (2.5A), but lacks spread-spectrum, has higher 15µA IQ, and no AEC-Q100 Grade 1 rating (only Grade 0). | Targeted at industrial/transportation rather than automotive under-hood; no built-in EMI reduction features. | Choose LM61480QRTWRQ1 only if AEC-Q100 Grade 1 and sub-5µA IQ are not required, and external EMI filtering is acceptable. |
Compared with MAX20077ATCD2/VY+, the MAX20077ATCE2/VY+ provides greater output capacitance headroom (>80μF) for ultra-low-noise applications like radar processors, while LM61480QRTWRQ1 trades automotive qualification and EMI features for broader temperature range flexibility outside AEC constraints.
Availability
MAX20077ATCE2/VY+ is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and telematics control units requiring stable component supply, AEC-Q100 compliance, and ultra-low quiescent current operation.
Supply support for MAX20077ATCE2/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 interface solutions.
The MAX20077 family is designed specifically for automotive power management, delivering compact, AEC-Q100-qualified buck converters that replace multi-stage architectures with single-chip 3.3V/5V regulation under wide-input, high-transient conditions.
FAQ
What is the maximum supported output capacitance for MAX20077ATCE2/VY+?
The MAX20077ATCE2/VY+ is specified for applications requiring more than 80μF effective output capacitance, as confirmed in the Applications Information section of the datasheet. This higher capacitance rating distinguishes it from the ATCD2/VY+ variant (≥60μF) and enables ultra-low-output-ripple performance in noise-sensitive automotive subsystems such as radar processors and high-speed SerDes interfaces. The device maintains stability and transient response within specification when paired with ≥80μF total effective capacitance after voltage derating.
Does MAX20077ATCE2/VY+ support both 3.3V and 5V fixed outputs?
Yes, MAX20077ATCE2/VY+ supports factory-trimmed fixed 3.3V and 5V outputs with ±2% accuracy in forced-PWM (FPWM) mode across the 6V–18V input range. These outputs are selected by connecting the FB pin directly to the BIAS pin - no external resistors required. The device also supports 1V–10V programmable outputs via an external resistor divider from OUT to FB to AGND, with ±1.5% FB reference accuracy enabling precise custom rail generation.
What is the purpose of the SPS pin on MAX20077ATCE2/VY+?
The SPS (Spread-Spectrum) pin on MAX20077ATCE2/VY+ enables ±3% frequency modulation of the internal 400kHz oscillator when pulled high, reducing peak radiated EMI emissions without affecting regulation performance. It features a 1MΩ internal pulldown, ensuring default disable. This feature is active only when the device operates using its internal oscillator - it does not interfere with externally synchronized operation via the SYNC pin, making it ideal for meeting CISPR 25 Class 5 automotive EMC requirements.
How does MAX20077ATCE2/VY+ handle input voltage transients like load dump?
MAX20077ATCE2/VY+ withstands 40V transients on the SUP pin per ISO 7637-2 Pulse 5a, thanks to integrated input protection circuitry. During a load-dump event, internal clamping and thermal foldback prevent damage while maintaining regulation if the transient duration is within specification limits. The device continues operation post-transient without latch-up, provided junction temperature remains below 175°C. No external TVS diode is required for standard automotive load-dump compliance.
What is the soft-start duration for MAX20077ATCE2/VY+?
The MAX20077ATCE2/VY+ features a fixed internal soft-start timer with a typical ramp time of 5.5ms to 7.5ms, depending on variant configuration. For the ATCE2/VY+ specifically, the soft-start duration is 5.5–7.5ms (as stated in Electrical Characteristics Table, "Soft-Start Ramp Time" row). This includes delay until PGOOD assertion and ensures controlled output voltage rise, preventing inrush current into large output capacitor banks and enabling safe power sequencing with downstream logic devices.
MAX20077ATCE2/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 10V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 400kHz, 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)
MAX20077ATCE2/VY+ FAQ
1.How can I place an order for MAX20077ATCE2/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20077ATCE2/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 MAX20077ATCE2/VY+ reliable?
The price and inventory of MAX20077ATCE2/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20077ATCE2/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20077ATCE2/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20077ATCE2/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20077ATCE2/VY+?
MAX20077ATCE2/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20077ATCE2/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 MAX20077ATCE2/VY+?
For technical support, including MAX20077ATCE2/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20077ATCE2/VY+ requirements.
6.How does Aetrix verify that MAX20077ATCE2/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20077ATCE2/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 MAX20077ATCE2/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20077ATCE2/VY+?
All MAX20077ATCE2/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20077ATCE2/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 MAX20077ATCE2/VY+ part is unused and in its original packaging.
Return procedure for MAX20077ATCE2/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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