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Analog Devices Inc./Maxim Integrated MAX20077ATCD2/VY+
- Part No.:
- MAX20077ATCD2/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20077ATCD2/VY+.pdf
- Description:
- IC REG BUCK ADJ 2.5A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,840
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Product details
Overview
MAX20077ATCD2/VY+ from Analog Devices is a 400kHz fixed-frequency synchronous buck converter delivering up to 2.5A output current with 3.5V–36V input range, ±2% output voltage accuracy in FPWM mode, and 6µA typical quiescent current at no load. It features integrated high-side/low-side MOSFETs, 99% dropout duty cycle, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX20077ATCD2/VY+ datasheet, MAX20077ATCD2/VY+ pinout, MAX20077ATCD2/VY+ application, or MAX20077ATCD2/VY+ equivalent, key selection considerations include its 400kHz switching frequency (optimized for efficiency), 2.5A rated output, side-wettable 12-pin TDFN package, and factory-trimmed 5V/3.3V or resistor-programmable 1V–10V output capability.
Technical Context
The MAX20077ATCD2/VY+ employs current-mode control architecture with internal compensation, enabling stable regulation without external loop components. Its 400kHz fixed switching frequency reduces conduction losses and improves light-load efficiency versus higher-frequency variants.
It supports forced PWM (FPWM) via SYNC pin biasing to BIAS, delivers PGOOD monitoring with 92–94% threshold hysteresis, and integrates spread-spectrum modulation (±3%) on the SPS pin to suppress EMI peaks - all while maintaining operation across –40°C to +125°C ambient and tolerating 40V load-dump transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 400kHz (fixed); enables lower switching losses and larger, cost-effective inductors (e.g., 10µH) |
| Output Current | 2.5A continuous; sufficient for ADAS camera modules, infotainment SoC core rails, and body control MCUs |
| Input Voltage Range | 3.5V–36V; covers cold-crank (4.5V), normal battery (12V/24V), and load-dump (40V transient tolerant) |
| Quiescent Current | 6µA typical at no load; extends battery life in always-on automotive systems like telematics and gateway ECUs |
| Output Accuracy | ±2% in FPWM mode (5V/3.3V); ensures reliable logic-level compliance for microcontrollers and sensors |
| Package | 3mm × 3mm, 12-pin side-wettable TDFN; supports automated optical inspection (AOI) and high thermal reliability in dense PCB layouts |
| Duty Cycle Max | 99%; sustains regulation during deep dropout (e.g., 5V out from 5.05V input), critical for start-stop engine operation |
Pinout & Package
MAX20077ATCD2/VY+ uses a 3mm × 3mm, 12-pin side-wettable TDFN package with exposed pad (EP) tied to PGND for thermal management. Pin numbering follows top-view orientation with pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SPS | Spread-spectrum enable | Pull high to activate ±3% frequency dithering; reduces EMI peak amplitude without affecting SYNC-controlled FPWM operation |
| 2 EN | High-voltage enable input | Logic-compatible from 3.3V to 36V; allows direct connection to MCU GPIO or automotive KEY signal without level-shifting |
| 3 BST | Bootstrap supply for HS gate driver | Requires 0.1µF ceramic capacitor to LX; enables efficient high-side FET drive in buck topology |
| 4 SUP | Main power input | Accepts 3.5V–36V; requires 4.7µF low-ESR ceramic bypass to PGND for stable startup and transient response |
| 5 LX | Switch node | Connects to inductor; high dv/dt node requiring tight layout to minimize EMI and ringing |
| 6 PGND | Power ground return | Carries high-frequency, high-current return path for LX and OUT; must be solidly connected to EP and separated from AGND |
| 7 AGND | Analog ground reference | Reference for FB, PGOOD, and internal error amplifier; routed separately from PGND to avoid noise coupling |
| 8 FB | Feedback input | 1.0V reference point; connect to BIAS for fixed 5V/3.3V or use resistor divider for 1V–10V programmable output |
| 9 OUT | Regulated output | Delivers up to 2.5A; bypassed with ≥44µF effective capacitance (voltage-derated) for stability per datasheet Table 2 |
| 10 BIAS | Internal 5V bias rail | Supplies internal circuitry; requires ≥1µF ceramic capacitor to AGND; used as pullup for PGOOD and SYNC |
| 11 SYNC | Mode control / synchronization input | Ground or open = skip mode; connect to BIAS = forced PWM; accepts external clock (325–500kHz) for precise timing control |
| 12 PGOOD | Open-drain power-good indicator | Active-high signal asserting when VOUT is within 92–95% of nominal; requires external 20kΩ pullup to BIAS or system rail |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates need for external power switches and gate drivers; reduces BOM count and board area by >30% vs discrete solutions |
| 400kHz fixed-frequency operation | Optimizes efficiency at medium-to-heavy loads; enables use of lower-cost, higher-saturation-current inductors (e.g., 10µH) |
| 99% maximum duty cycle | Supports ultra-low dropout operation (e.g., 5V out from 5.05V input), essential for automotive start-stop and cold-crank scenarios |
| AEC-Q100 Grade-1 qualification | Validated for –40°C to +125°C operation with full electrical characterization; meets automotive reliability and stress-test requirements |
| PGOOD with 92–94% threshold hysteresis | Provides robust power sequencing feedback for downstream processors; avoids false resets during line/load transients |
| Side-wettable TDFN package | Enables automated solder-joint inspection (AOI) and improves manufacturing yield in automotive-grade SMT lines |
Applications
| ADAS Camera Power Supply | Automotive Infotainment Core Rail |
|---|---|
Use Scenario: Powers image sensor and ISP in forward-facing ADAS cameras operating under wide temperature and input voltage variation. IC Role / Device Role / Timing Role: Primary DC-DC regulator converting 12V battery to stable 3.3V or 5V rail with fast transient response and low noise. Use Value: 400kHz switching minimizes inductor size while maintaining >92% efficiency at 1.5A load; PGOOD enables safe sensor initialization before frame capture. | Use Scenario: Supplies core voltage to application processors (e.g., NXP i.MX8, Qualcomm SA8155) in head-unit and digital cluster systems. IC Role / Device Role / Timing Role: High-current buck converter delivering 2.5A at 1.0V–1.2V (via external resistor divider) with tight output regulation. Use Value: ±2% FPWM accuracy ensures processor stability across temperature; 99% duty cycle prevents brownout during engine cranking. |
| Body Control Module (BCM) Microcontroller Rail | Telematics Control Unit (TCU) Always-On Supply |
Use Scenario: Generates 5V rail for 8-bit/32-bit MCUs (e.g., ST STM32, Infineon TC3xx) in door modules, seat controllers, and lighting ECUs. IC Role / Device Role / Timing Role: Primary power source with ultra-low quiescent current and load-dump protection. Use Value: 6µA no-load IQ extends vehicle battery life during extended parking; 40V transient tolerance eliminates need for external TVS diodes. | Use Scenario: Provides always-on 3.3V supply to cellular modem, GNSS receiver, and CAN interface in connected car TCUs. IC Role / Device Role / Timing Role: Standby-optimized buck regulator supporting wake-on-CAN and LTE/LTE-A low-power states. Use Value: Skip-mode + standby mode achieves <10µA system sleep current; PGOOD synchronizes modem boot sequence with host MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20077ATCD/VY+ | Same 400kHz frequency and 2.5A rating, but 5.5ms soft-start (vs. 7.5ms for ATCD2/VY+) and 44µF required output capacitance (same as ATCD2/VY+) | Identical functional scope; differs only in soft-start timing and minor production variant coding | Select MAX20077ATCD2/VY+ when strict adherence to 7.5ms soft-start ramp is required per system safety specification. |
| MPQ4420AGL-A-Z | 400kHz, 2A output, 3.3V–36V input, but lacks AEC-Q100 qualification and has higher 15µA IQ | Suitable for industrial or non-automotive transportation; not qualified for front-end automotive modules | Choose MPQ4420AGL-A-Z only for cost-sensitive non-automotive designs where AEC-Q100 and sub-10µA IQ are not mandatory. |
Compared with MAX20077ATCD/VY+, the MAX20077ATCD2/VY+ offers longer soft-start (7.5ms vs. 5.5ms) for enhanced inrush control, while MPQ4420AGL-A-Z trades automotive qualification and ultra-low IQ for lower unit cost in non-safety-critical applications.
Availability
MAX20077ATCD2/VY+ is available at Aetrix Electronics and suitable for automotive ADAS camera power supplies, infotainment processor core rails, and body control module microcontroller supplies requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for MAX20077ATCD2/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 power management semiconductors, serving automotive, industrial, and communications markets with precision, reliability, and longevity.
The MAX20077 family is designed specifically for automotive power conversion - delivering compact, AEC-Q100-qualified buck regulators with ultra-low IQ, wide VIN range, and robust protection for demanding vehicle environments.
FAQ
What is the switching frequency of the MAX20077ATCD2/VY+ and how is it configured?
The MAX20077ATCD2/VY+ operates at a fixed 400kHz switching frequency, internally set and not user-adjustable. This frequency is factory-trimmed and remains constant regardless of input voltage or load condition. Unlike variants with 2.1MHz operation, the MAX20077ATCD2/VY+ does not support frequency selection via external components or SYNC pin configuration - its 400kHz setting is hard-coded for optimal efficiency in medium-power automotive applications.
Does the MAX20077ATCD2/VY+ support both fixed and adjustable output voltages?
Yes, the MAX20077ATCD2/VY+ supports both configurations. For fixed outputs, connect FB directly to BIAS to select factory-trimmed 5V or 3.3V. For adjustable outputs between 1V and 10V, use an external resistor divider from OUT to FB to AGND, leveraging the internal 1.0V feedback reference (±1.5% accuracy). The device's FB pin draws only 0.02µA, minimizing divider current error and enabling high-impedance resistor values.
What is the maximum output current rating of the MAX20077ATCD2/VY+ and under what conditions is it guaranteed?
The MAX20077ATCD2/VY+ is rated for 2.5A continuous output current. This rating is validated over the full operating junction temperature range (–40°C to +150°C), with input voltage from 3.5V to 36V, and under forced PWM (FPWM) mode. Derating applies above +70°C ambient due to thermal limits - the device's θJA of 41°C/W means sustained 2.5A operation requires adequate PCB copper area and airflow or heatsinking to maintain TJ ≤ +150°C.
How does the MAX20077ATCD2/VY+ handle automotive load-dump transients?
The MAX20077ATCD2/VY+ withstands 40V load-dump transients for up to 1 second without damage or latch-up, per its Absolute Maximum Ratings. Internally, it uses robust input-stage protection and clamping structures on the SUP pin. No external TVS diode is required for standard ISO 7637-2 Pulse 5a (35V/40V, 100ms–1s) compliance - simplifying design and reducing BOM cost in automotive front-end power stages.
What package type and thermal characteristics does the MAX20077ATCD2/VY+ use?
The MAX20077ATCD2/VY+ uses a 3mm × 3mm, 12-pin side-wettable TDFN package (package code TD1233Y+2C) with exposed pad. Its thermal resistance is θJA = 41°C/W (four-layer board) and θJC = 9°C/W. The exposed pad must be soldered to a dedicated PGND copper plane for effective heat transfer - achieving >80% of rated current capability requires ≥200mm² of 2-oz copper connected to the EP via ≥4 thermal vias.
MAX20077ATCD2/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:
- 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)
MAX20077ATCD2/VY+ FAQ
1.How can I place an order for MAX20077ATCD2/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20077ATCD2/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 MAX20077ATCD2/VY+ reliable?
The price and inventory of MAX20077ATCD2/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20077ATCD2/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20077ATCD2/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20077ATCD2/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20077ATCD2/VY+?
MAX20077ATCD2/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20077ATCD2/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 MAX20077ATCD2/VY+?
For technical support, including MAX20077ATCD2/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20077ATCD2/VY+ requirements.
6.How does Aetrix verify that MAX20077ATCD2/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20077ATCD2/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 MAX20077ATCD2/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20077ATCD2/VY+?
All MAX20077ATCD2/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20077ATCD2/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 MAX20077ATCD2/VY+ part is unused and in its original packaging.
Return procedure for MAX20077ATCD2/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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