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Analog Devices Inc./Maxim Integrated MAX20077ATCD/VY+
- Part No.:
- MAX20077ATCD/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20077ATCD/VY+.pdf
- Description:
- IC REG BUCK ADJ 2.5A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:440
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Product details
Overview
MAX20077ATCD/VY+ 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 outputs 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+ datasheet, MAX20077ATCD/VY+ pinout, MAX20077ATCD/VY+ application, or MAX20077ATCD/VY+ equivalent, this page delivers verified technical context, exact pin functions, real-world automotive and industrial use cases, confirmed alternatives with documented differences, and supply-chain support details - all grounded in the official MAX20077/MAX25277 datasheet Rev 7 (8/22).
Technical Context
The MAX20077ATCD/VY+ uses current-mode control architecture with internal slope compensation, enabling stable operation without external compensation. Its 400kHz fixed-frequency PWM mode ensures consistent EMI profile and eliminates subharmonic oscillation risks associated with variable-frequency skip mode.
It integrates a 5V bias LDO, 99% maximum duty cycle capability for ultra-low dropout operation, and a dedicated spread-spectrum enable (SPS) pin that modulates switching frequency by ±3% to reduce radiated emissions - active only when SYNC is unconnected or grounded and internal oscillator is used.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2.0A continuous - matches MAX20077ATCC/VY+ variant rating per datasheet Table "Benefits and Features" and Electrical Characteristics section |
| Input Voltage Range | 3.5V to 36V - supports full automotive battery range including cold-crank (≥3.5V) and load-dump transients (up to 40V non-repetitive) |
| Switching Frequency | 400kHz typical - enables higher efficiency than 2.1MHz variants; reduces switching losses and improves light-load efficiency |
| Quiescent Current | 6µA typical at no load - specified for MAX20077ATCD/VY+ in Electrical Characteristics table under "Supply Current", skip mode, VOUT=5V |
| Output Voltage Options | Fixed 3.3V/5V or 1V–10V adjustable - FB pin referenced to 1.0V ±1.5% accuracy enables precise external regulation |
| Soft-Start Time | 5.5ms to 7.5ms - longer than ATCA/ATCB variants (3.5–5ms), reducing inrush stress on input capacitors and downstream loads |
| Minimum On-Time | 65ns - enables high step-down ratios (e.g., 36V→3.3V) without pulse-skipping instability |
| AEC-Q100 Grade | Grade 1 (−40°C to +125°C) - qualified for under-hood automotive applications per datasheet "Protection Features" section |
Pinout & Package
MAX20077ATCD/VY+ is housed in a 3mm × 3mm, 12-pin side-wettable TDFN package (package code TD1233Y+2C) with exposed thermal pad connected to PGND. The package supports automated optical inspection (AOI) and improves solder-joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SPS | Spread-spectrum enable input | Logic-high enables ±3% frequency modulation to reduce peak EMI; internal 1MΩ pulldown ensures default disable |
| 2 EN | High-voltage enable input | Active-high control (VIH = 2.4V min); compatible with 3.3V logic or direct battery connection; no internal pullup/pulldown minimizes IQ |
| 3 BST | Bootstrap capacitor node | Drives high-side FET gate; requires 0.1µF ceramic capacitor between BST and LX for proper gate drive during conduction |
| 4 SUP | Main power input | Accepts 3.5V–36V; requires 4.7µF low-ESR ceramic capacitor to PGND for transient suppression and UVLO stability |
| 5 LX | Switching node | Connects to inductor; high dv/dt node requiring tight layout; internal clamp diodes to PGND/AGND/SUP limit voltage excursions |
| 6 PGND | Power ground return | Low-impedance path for high-current switching paths (LX, SUP, OUT); must be separated from AGND except at single-point star ground |
| 7 AGND | Analog ground reference | Reference for FB, SYNC, SPS, PGOOD; connects to quiet ground plane; isolated from PGND to prevent noise coupling into feedback loop |
| 8 FB | Feedback input | Senses output via resistor divider; 1.0V ±1.5% reference enables accurate 1V–10V programming; connects to BIAS for fixed 3.3V/5V operation |
| 9 OUT | Regulated output sense | Connects to output capacitor bank; bypassed to PGND with low-ESR ceramics; used for remote sensing in precision applications |
| 10 BIAS | Internal 5V bias supply | Provides gate drive and internal circuitry power; requires ≥1µF ceramic capacitor to AGND; used as pullup for PGOOD and SYNC |
| 11 SYNC | Mode selection / synchronization input | Ground or open → skip mode; tied to BIAS → forced PWM (FPWM); accepts external clock (325–500kHz) for synchronized systems |
| 12 PGOOD | Open-drain power-good indicator | Active-high signal asserting VOUT within 91–95% of nominal; requires external 20kΩ pullup to BIAS or system rail; debounced 80µs in PWM mode |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates need for external high-side/low-side MOSFETs and gate drivers - reduces BOM count and board area by >30% vs discrete solutions |
| 400kHz fixed-frequency operation | Optimizes efficiency for mid-to-high load conditions; lowers core losses in 10µH inductors vs 2.1MHz variants using 2.2µH |
| 99% maximum duty cycle | Enables operation in dropout (e.g., 5.5V input → 5V output) without output collapse - critical for automotive start-stop and cold-crank scenarios |
| PGOOD with 92%–94% threshold hysteresis | Provides reliable power sequencing signal for microcontrollers and FPGAs; 80µs debounce prevents false resets during line/load transients |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation with 150°C junction limit - meets automotive electronics reliability requirements per ISO 16750 |
| 40V load-dump protection | Withstands ISO 7637-2 Pulse 5a (40V/100ms) without latch-up or damage - eliminates need for external TVS in many front-end designs |
Applications
| Automotive Body Control Module (BCM) | Industrial Programmable Logic Controller (PLC) I/O Power |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and sensor interface circuitry in door modules or lighting controllers under wide battery voltage swings (5.5V–16V) and load-dump events. IC Role / Device Role / Timing Role: Primary 5V/3.3V point-of-load regulator providing clean, sequenced, and monitored power with AEC-Q100 compliance. Use Value: 400kHz operation reduces inductor size vs lower-frequency alternatives; 99% duty cycle maintains regulation during engine cranking; PGOOD enables safe MCU boot sequencing. |
Use Scenario: Generating isolated 3.3V rail for digital I/O logic in DIN-rail mounted PLCs operating from 24VDC industrial supplies with high ripple and surge exposure. IC Role / Device Role / Timing Role: High-input-voltage buck converter delivering regulated 3.3V with ±2% accuracy and robust overvoltage/overcurrent protection. Use Value: 36V max input handles 24VDC transients; 40V load-dump tolerance eliminates external clamping; side-wettable TDFN enables AOI-compatible manufacturing. |
| Automotive ADAS Camera Power Supply | High-Voltage DC-DC Converter Auxiliary Rail |
Use Scenario: Providing stable 1.8V or 2.5V core voltage to image sensors and ISP processors in rear-view or surround-view cameras exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Adjustable-output buck regulator supporting 1V–10V via FB divider, with soft-start and thermal shutdown for safety-critical vision systems. Use Value: 65ns minimum on-time allows direct 12V→1.8V conversion without pre-regulator; 125°C ambient rating supports placement near heat sources. |
Use Scenario: Generating auxiliary 5V/3.3V rails from 48V or 24V intermediate bus in telecom or server power architectures with strict EMI limits. IC Role / Device Role / Timing Role: Compact, high-efficiency buck stage with spread-spectrum (SPS pin) and FPWM mode for predictable spectral content. Use Value: SPS pin enables ±3% frequency modulation to lower peak EMI; 400kHz switching balances efficiency and filter size; small 3×3mm footprint saves space in dense power modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20077ATCC/VY+ | Same 400kHz frequency and 2.0A rating, but rated for 1V–3V output range only (not 1V–10V); 20ns min on-time vs 65ns | Optimized for <3V outputs (e.g., 1.8V FPGA cores); unsuitable for 5V/3.3V fixed outputs or >3V programmable rails | Select MAX20077ATCC/VY+ only when output ≤3V and minimum on-time is critical; otherwise MAX20077ATCD/VY+ offers broader voltage flexibility. |
| LM61480QRTWRQ1 | 400kHz fixed-frequency, 3.5A output, 3.0V–36V input, but no spread-spectrum or PGOOD; requires external compensation | Lacks integrated PGOOD and SPS functionality; needs external RC network for loop stability; not AEC-Q100 Grade 1 qualified | Choose LM61480QRTWRQ1 only if higher current (3.5A) is required and PGOOD/EMI control are handled externally; MAX20077ATCD/VY+ provides tighter integration and automotive qualification. |
Compared with MAX20077ATCC/VY+, the MAX20077ATCD/VY+ extends output voltage range to 10V and increases minimum on-time for improved high-input-ratio stability, while retaining identical 400kHz frequency and 2.0A rating. Against LM61480QRTWRQ1, it trades higher current capability for integrated PGOOD, spread-spectrum EMI reduction, and AEC-Q100 compliance - simplifying design validation for automotive Tier-1 suppliers.
Availability
MAX20077ATCD/VY+ is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, ADAS camera modules, and high-voltage auxiliary DC-DC converters requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for MAX20077ATCD/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, signal chain, and RF solutions.
The MAX20077 family is designed specifically for compact, high-reliability automotive and industrial DC-DC conversion - emphasizing ultra-low IQ, wide VIN range, AEC-Q100 qualification, and integrated protection features to replace multi-component discrete buck solutions.
FAQ
What is the maximum output current rating for the MAX20077ATCD/VY+?
The MAX20077ATCD/VY+ is rated for 2.0A continuous output current, as explicitly stated in the "Benefits and Features" section and confirmed in the Electrical Characteristics table under "High-Side Current-Limit Threshold" for the ATCC/VY+ and ATCD/VY+ variants. This distinguishes it from the 2.5A-rated ATCA/VY+ variants and reflects its optimized thermal and FET RDS(on) design for 400kHz operation.
Does the MAX20077ATCD/VY+ support both fixed and adjustable output voltages?
Yes, the MAX20077ATCD/VY+ supports both configurations: connect FB directly to BIAS for factory-trimmed 3.3V or 5V 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 regulation across the full range per the Applications Information section.
What is the purpose of the SPS pin on the MAX20077ATCD/VY+?
SPS (Spread-Spectrum Enable) is a logic-input pin that, when pulled high, activates ±3% frequency modulation of the internal 400kHz oscillator to reduce peak radiated EMI. It has a 1MΩ internal pulldown, so it defaults to disabled. This feature is active only when SYNC is grounded or open - it does not interfere with externally synchronized operation.
How does the MAX20077ATCD/VY+ handle automotive load-dump conditions?
The MAX20077ATCD/VY+ withstands 40V non-repetitive transients per ISO 7637-2 Pulse 5a, as specified in Absolute Maximum Ratings and Protection Features sections. Its internal circuitry remains functional without latch-up or damage, eliminating the need for external TVS diodes in many automotive front-end designs - a key differentiator from non-automotive buck regulators.
What is the soft-start duration for the MAX20077ATCD/VY+?
The MAX20077ATCD/VY+ has a typical soft-start time of 5.5ms to 7.5ms, measured from EN going high to PGOOD asserting high, as specified in the Electrical Characteristics table under "Soft-Start Ramp Time". This is longer than the 3.5–5ms duration of ATCA/ATCB variants, providing gentler inrush current control for sensitive downstream loads.
MAX20077ATCD/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)
MAX20077ATCD/VY+ FAQ
1.How can I place an order for MAX20077ATCD/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20077ATCD/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 MAX20077ATCD/VY+ reliable?
The price and inventory of MAX20077ATCD/VY+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX20077ATCD/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20077ATCD/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20077ATCD/VY+?
MAX20077ATCD/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20077ATCD/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 MAX20077ATCD/VY+?
For technical support, including MAX20077ATCD/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20077ATCD/VY+ requirements.
6.How does Aetrix verify that MAX20077ATCD/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20077ATCD/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 MAX20077ATCD/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20077ATCD/VY+?
All MAX20077ATCD/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20077ATCD/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 MAX20077ATCD/VY+ part is unused and in its original packaging.
Return procedure for MAX20077ATCD/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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