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Analog Devices Inc./Maxim Integrated MAX20077ATCD/VY+T
- Part No.:
- MAX20077ATCD/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20077ATCD/VY+T.pdf
- Description:
- IC REG BUCK ADJ 2.5A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,423
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Product details
Overview
MAX20077ATCD/VY+T from Analog Devices is a synchronous buck DC-DC converter with integrated high-side and low-side MOSFETs, delivering up to 2.0A output current across a 3.5V–36V input range while consuming only 6µA typical quiescent current at no load in skip mode. It operates at a fixed 400kHz switching frequency, supports 3.3V/5V fixed outputs or 1V–10V programmable output via resistor divider, and features PGOOD monitoring, 99% dropout duty cycle, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX20077ATCD/VY+T datasheet, MAX20077ATCD/VY+T pinout, MAX20077ATCD/VY+T application, or MAX20077ATCD/VY+T equivalent, this page delivers verified technical context, real-world design implications of its 400kHz operation, 2.0A current limit, ±2% output accuracy in FPWM mode, spread-spectrum EMI reduction, and thermal shutdown at 175°C - all critical for automotive infotainment, ADAS camera modules, and industrial 24V-to-5V/3.3V conversion.
Technical Context
The MAX20077ATCD/VY+T implements current-mode control with internal slope compensation and fixed-frequency PWM (400kHz) or pulse-skipping operation, enabling stable regulation across wide VIN–VOUT ratios including dropout conditions. Its 65ns minimum on-time and 99% maximum duty cycle support direct step-down from automotive battery (e.g., 12V→3.3V) without cascaded stages.
It integrates a 5V bias LDO, high-voltage EN input (3.3V–40V compatible), open-drain PGOOD with 92–94% threshold hysteresis, and SPS-enabled ±3% spread-spectrum modulation - all operating within –40°C to +125°C ambient and qualified to AEC-Q100 Grade 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2.0A continuous - enables single-stage 24V-to-5V/3.3V conversion for automotive ECUs without external current boosting. |
| 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) - reduces switching losses vs. 2.1MHz variants, optimizing efficiency at medium-to-heavy loads in industrial power supplies. |
| Quiescent Current | 6µA (typ) at no load - extends battery life in always-on automotive modules such as telematics and body controllers. |
| Output Accuracy | ±2% in FPWM mode (5V/3.3V) - ensures reliable microcontroller core voltage compliance without post-regulation. |
| Thermal Shutdown | 175°C with 15°C hysteresis - provides robust protection during sustained overload or poor PCB thermal layout. |
| Soft-Start Time | 5.5ms to 7.5ms - prevents inrush current in systems with large downstream capacitance like display power rails. |
Pinout & Package
MAX20077ATCD/VY+T is housed in a 3mm × 3mm, 12-pin side-wettable TDFN package (TD1233Y+2C) with exposed thermal pad connected to PGND for enhanced heat dissipation in space-constrained automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SPS | Spread-spectrum enable | Pull-high to activate ±3% frequency dithering - reduces peak EMI emissions without affecting SYNC-controlled FPWM timing. |
| 2 EN | High-voltage enable input | Logic-compatible from 3.3V MCU or direct battery connection; no internal pullup - enables ultra-low-IQ standby when held low. |
| 3 BST | Bootstrap supply for HS gate driver | Requires 0.1µF ceramic capacitor to LX - sustains >99% duty cycle in dropout by periodically refreshing gate charge. |
| 4 SUP | Main power input | Accepts 3.5V–36V; requires 4.7µF ceramic bypass to PGND - handles ISO 7637-2 pulse 5a (load dump) transients up to 40V. |
| 5 LX | Switch node | Connects to inductor; high-impedance when disabled - interfaces with 10µH inductor for 400kHz operation per recommended design. |
| 6 PGND | Power ground return | Carries high-frequency switch current - must be isolated from AGND except at single-point star connection to minimize noise coupling. |
| 7 AGND | Analog ground reference | Reference for FB, PGOOD, and internal error amplifier - separates sensitive analog paths from noisy power loops. |
| 8 FB | Feedback input | 1.0V ±1.5% reference - sets output via resistor divider (RFB1/RFB2); tied to BIAS for fixed 3.3V/5V operation. |
| 9 OUT | Regulated output sense | Connects to output capacitor bank - requires ≥44µF total effective capacitance (voltage-derated) for stability per datasheet Table 2. |
| 10 BIAS | Internal 5V bias supply | Provides regulated 5V for internal circuitry and optional PGOOD pullup - bypass with ≥1µF ceramic to AGND. |
| 11 SYNC | Mode selection clock input | Ground or open = skip mode; connect to BIAS = forced PWM - enables dynamic efficiency/runtime tradeoff in adaptive systems. |
| 12 PGOOD | Open-drain power-good flag | Active-high signal debounced for 80µs (PWM) / 110µs (skip) - used for processor reset sequencing or system-level fault reporting. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates external MOSFETs and drivers - reduces BOM count and board area in compact automotive modules. |
| 400kHz fixed switching frequency | Optimizes conduction vs. switching loss balance - achieves >92% peak efficiency at 1A load with 10µH inductor (vs. 2.2µH for 2.1MHz). |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation - meets reliability requirements for under-hood and dashboard-mounted electronics. |
| 40V load-dump protection | Withstands ISO 7637-2 Pulse 5a transients without latch-up or damage - removes need for external TVS in many designs. |
| Programmable 1V–10V output | Supports custom rail voltages (e.g., 1.8V for image sensors, 9V for analog front-ends) using standard resistor-divider topology. |
| PGOOD with 92–94% threshold hysteresis | Enables precise power-rail monitoring for safety-critical systems - avoids false resets during minor line/load transients. |
Applications
| Automotive Infotainment | ADAS Camera Power Supply |
|---|---|
Use Scenario: Powering SoC, display interface, and audio codec in head-unit systems requiring stable 5V/3.3V rails from 12V battery. IC Role / Device Role / Timing Role: Primary buck regulator providing clean, sequenced 5V domain with PGOOD-driven reset assertion. Use Value: 400kHz operation minimizes EMI near sensitive RF receivers; 6µA IQ extends parking-mode battery life beyond 30 days. |
Use Scenario: Generating 3.3V for CMOS image sensor and 1.8V for ISP in surround-view camera modules. IC Role / Device Role / Timing Role: Dual-output capable regulator (with external divider) delivering tightly regulated low-noise bias for pixel readout. Use Value: 65ns min on-time enables direct 12V→1.8V conversion; ±2% accuracy ensures sensor ADC reference stability over temperature. |
| Industrial 24V-to-5V Conversion | Telematics Control Unit (TCU) |
Use Scenario: Converting 24V factory bus to 5V logic supply in PLC I/O modules with strict EMC limits. IC Role / Device Role / Timing Role: EMI-optimized buck converter using spread-spectrum (SPS pin) and FPWM mode for predictable spectral content. Use Value: ±3% spread spectrum reduces peak radiated emissions by >10dB; 400kHz allows use of low-cost, high-saturation inductors. |
Use Scenario: Always-on power management for LTE/GNSS modules requiring low-quiescent operation during cellular idle states. IC Role / Device Role / Timing Role: Standby regulator maintaining 3.3V rail with <10µA system-level sleep current. Use Value: 6µA no-load IQ and automatic skip-to-standby transition below 5mA load enable >1-year battery backup without recharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20077ATCA/VY+T | 2.5A rated output, 2.1MHz switching, 3.5µA IQ, 3.5ms soft-start | Better suited for higher-current, space-constrained 2.1MHz designs where efficiency at light load is prioritized over heavy-load conduction loss | Select when output current exceeds 2.0A or when smaller magnetics are required despite higher switching loss |
| LM61480QRNXTQ1 | 3.5A output, 400kHz/2.1MHz selectable, 15µA IQ, integrated compensation, -40°C to +150°C | Offers wider junction temp rating and pin-selectable frequency but lacks spread-spectrum and has higher IQ | Prefer for extended-temperature industrial applications where AEC-Q100 is not mandatory and layout simplicity outweighs EMI optimization |
Compared with MAX20077ATCA/VY+T and LM61480QRNXTQ1, the MAX20077ATCD/VY+T uniquely balances 2.0A capability, ultra-low 6µA IQ, built-in spread-spectrum, and AEC-Q100 qualification - making it optimal for cost-sensitive, EMI-critical automotive subsystems where 400kHz efficiency and battery longevity are primary constraints.
Availability
MAX20077ATCD/VY+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial 24V-to-5V/3.3V conversion requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for MAX20077ATCD/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 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.
The MAX20077 family is designed specifically for automotive and industrial DC-DC conversion - delivering ultra-low IQ, wide-input operation, and AEC-Q100 reliability in miniature TDFN packages for space- and efficiency-constrained power rails.
FAQ
What is the maximum output current capability of the MAX20077ATCD/VY+T?
The MAX20077ATCD/VY+T is rated for 2.0A continuous output current, as confirmed in the Electrical Characteristics table under "High-Side Current-Limit Threshold" (2.55A to 3.25A typ) and explicitly stated in the Benefits and Features section. This rating applies across the full –40°C to +125°C operating temperature range and is validated for AEC-Q100 Grade 1 compliance. The device maintains regulation up to this current with proper thermal management and recommended external components (10µH inductor, ≥44µF output capacitance).
Does the MAX20077ATCD/VY+T support both fixed and adjustable output voltages?
Yes, the MAX20077ATCD/VY+T supports both configurations: tie FB directly to BIAS for factory-trimmed 3.3V or 5V fixed outputs, or use an external resistor divider from OUT to FB to AGND to set any output between 1V and 10V. The FB pin has a precise 1.0V ±1.5% reference, enabling accurate programmable regulation - a capability confirmed in the Electrical Characteristics table and Applications Information section.
What is the purpose of the SPS pin on the MAX20077ATCD/VY+T?
The SPS (Spread-Spectrum) pin on the MAX20077ATCD/VY+T enables ±3% frequency modulation of the internal 400kHz oscillator when pulled high, reducing peak radiated EMI emissions without affecting functional performance. This feature is active only during internally generated switching (not when SYNC is driven externally) and is documented in the Pin Description and Detailed Description sections of the datasheet.
How does the MAX20077ATCD/VY+T handle input voltage transients such as load dump?
The MAX20077ATCD/VY+T withstands 40V transients on the SUP pin per Absolute Maximum Ratings and is explicitly rated for "40V Load-Dump Protection" in the Benefits and Features list. Its internal circuitry remains functional during ISO 7637-2 Pulse 5a events, eliminating the need for external TVS diodes in many automotive designs - a key reliability advantage confirmed across the General Description and Absolute Maximum Ratings tables.
What thermal protection mechanisms are implemented in the MAX20077ATCD/VY+T?
The MAX20077ATCD/VY+T incorporates thermal shutdown at 175°C (typ) with 15°C hysteresis, as specified in the Electrical Characteristics table under "Thermal Shutdown" and "Thermal-Shutdown Hysteresis." When junction temperature exceeds this threshold, the device disables switching and reinitiates soft-start only after cooling below 160°C - a behavior verified in the Detailed Description section and essential for AEC-Q100 compliance.
MAX20077ATCD/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:
- 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)
MAX20077ATCD/VY+T FAQ
1.How can I place an order for MAX20077ATCD/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20077ATCD/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 MAX20077ATCD/VY+T reliable?
The price and inventory of MAX20077ATCD/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 MAX20077ATCD/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20077ATCD/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20077ATCD/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20077ATCD/VY+T?
MAX20077ATCD/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20077ATCD/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 MAX20077ATCD/VY+T?
For technical support, including MAX20077ATCD/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20077ATCD/VY+T requirements.
6.How does Aetrix verify that MAX20077ATCD/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20077ATCD/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 MAX20077ATCD/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20077ATCD/VY+T?
All MAX20077ATCD/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20077ATCD/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 MAX20077ATCD/VY+T part is unused and in its original packaging.
Return procedure for MAX20077ATCD/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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