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Analog Devices Inc./Maxim Integrated MAX20077ATCB/VY+
- Part No.:
- MAX20077ATCB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20077ATCB/VY+.pdf
- Description:
- IC REG BUCK ADJ 2.5A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:603
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Product details
Overview
MAX20077ATCB/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 from a 3.5V–36V input. It features 3.5µA quiescent current in standby mode, ±2% output voltage accuracy (3.3V fixed option), and 2.1MHz switching frequency-enabling compact automotive power rails for ADAS sensors and infotainment head units.
For engineers reviewing the MAX20077ATCB/VY+ datasheet, MAX20077ATCB/VY+ pinout, MAX20077ATCB/VY+ application, or MAX20077ATCB/VY+ equivalent, key selection criteria include its 65ns minimum on-time, 99% dropout duty cycle, AEC-Q100 qualification, 40V load-dump protection, and side-wettable 12-pin TDFN package for automated optical inspection.
Technical Context
The MAX20077ATCB/VY+ implements current-mode control with internal slope compensation and no external compensation required. Its 2.1MHz fixed-frequency PWM operation ensures AM-band immunity and supports small 2.2µH inductors and ceramic input/output capacitors.
It operates in forced-PWM (FPWM) or skip mode depending on SYNC pin state, with PGOOD monitoring output regulation and SPS enabling ±3% spread-spectrum modulation to reduce EMI peak emissions without affecting SYNC-synchronized operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2.5A continuous - supports single-rail powering of automotive microcontrollers and camera modules |
| Input Voltage Range | 3.5V to 36V - accommodates cold-crank (4.5V) and load-dump (40V transient) conditions per ISO 7637-2 |
| Quiescent Current | 3.5µA at no load - enables >10-year battery standby in always-on vehicle modules |
| Switching Frequency | 2.1MHz (typ) - allows use of sub-3mm inductors and avoids AM radio band (0.53–1.71MHz) |
| Output Accuracy | ±2% at 3.3V in FPWM mode - meets tight tolerance requirements for FPGA I/O and sensor analog supplies |
| Min On-Time | 65ns (typ) - enables direct 3.3V regulation from 36V input without pre-regulator stage |
| Duty Cycle Max | 99% - sustains regulation during automotive dropout (e.g., 5.5V input → 3.3V out) |
Pinout & Package
MAX20077ATCB/VY+ uses a 3mm × 3mm, 12-pin side-wettable TDFN package with exposed thermal pad (package code TD1233Y+2C), optimized for reflow soldering and automated optical inspection in automotive PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SPS | Spread-spectrum enable | Pull-high to activate ±3% frequency dithering for EMI reduction; internal 1MΩ pulldown |
| 2 EN | High-voltage enable input | Logic-compatible from 0.6V/2.4V thresholds; accepts 12V/24V automotive signals directly |
| 3 BST | Bootstrap supply for HS gate driver | Requires 0.1µF ceramic capacitor to LX; enables 100% duty-cycle operation via charge pump |
| 4 SUP | Main power input | Accepts 3.5V–36V; requires 4.7µF ceramic bypass to PGND for stable startup |
| 5 LX | Switch node | Connects to inductor; high dv/dt node requiring tight layout and Kelvin grounding |
| 6 PGND | Power ground | High-current return path for LX, OUT, and input capacitor; separate from AGND |
| 7 AGND | Analog ground | Reference for FB, PGOOD, and internal bias; must be star-connected to PGND at single point |
| 8 FB | Voltage feedback input | 1.0V reference; connect to BIAS for 3.3V fixed output or resistor divider for 1V–10V adjustment |
| 9 OUT | Regulated output | Delivers 3.3V at up to 2.5A; bypass with ≥30µF effective ceramic capacitance |
| 10 BIAS | Internal 5V bias rail | Supplies internal circuitry; requires 1µF ceramic cap to AGND; used as pullup for PGOOD |
| 11 SYNC | Mode control / synchronization | Ground = skip mode; BIAS = forced PWM; enables dynamic mode switching during operation |
| 12 PGOOD | Open-drain power-good flag | Active-high signal asserting when VOUT is within 92–95% of nominal; requires external 20kΩ pullup |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive temperature range (−40°C to +125°C ambient) and 40V load-dump survival |
| Integrated FETs | 70mΩ high-side + 70mΩ low-side RDS(on) - eliminates external MOSFETs and gate drivers |
| Fixed 3.3V output | Factory-trimmed 3.3V option with ±2% accuracy in FPWM mode - no external resistors needed |
| Soft-start time | 3.5ms typical - prevents inrush current during cold-crank startup and enables controlled power sequencing |
| Thermal shutdown | 175°C trip with 15°C hysteresis - protects against sustained overload or poor heatsinking in enclosed modules |
Applications
| ADAS Camera Power Supply | Automotive Infotainment Core Rail |
|---|---|
Use Scenario: Powers 3.3V image sensor and ISP in forward-facing camera module under stop/start and load-dump conditions. IC Role / Device Role / Timing Role: Primary DC-DC regulator converting 12V battery to stable 3.3V with PGOOD sequencing to processor reset. Use Value: 65ns min on-time enables direct step-down from 36V transients; 3.5µA IQ extends parking-mode battery life. | Use Scenario: Supplies 3.3V core logic for touchscreen MCU and audio codec in head unit with variable lighting loads. IC Role / Device Role / Timing Role: Main system buck converter with EN controlled by ignition signal and PGOOD tied to MCU power management unit. Use Value: 99% duty cycle maintains regulation during engine cranking (5.5V battery); AEC-Q100 ensures reliability over 15-year vehicle life. |
| Industrial CAN Node Power | Telematics Control Unit (TCU) Backup Rail |
Use Scenario: Generates isolated 3.3V supply for CAN transceiver and microcontroller in harsh factory-floor environment. IC Role / Device Role / Timing Role: Input-stage regulator accepting wide-range 9–36V DC input; feeds isolated DC-DC and LDO stages. Use Value: 40V transient tolerance eliminates need for external TVS; side-wettable TDFN supports AOI inspection for high-reliability manufacturing. | Use Scenario: Provides always-on 3.3V rail for GNSS receiver and cellular modem in TCU during vehicle sleep mode. IC Role / Device Role / Timing Role: Low-IQ buck converter enabled by wake-up interrupt; PGOOD monitors rail integrity before modem initialization. Use Value: 3.5µA standby current enables >10-year battery backup; FPWM mode ensures clean RF power during data transmission. |
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+ | Same 2.5A rating and 2.1MHz frequency, but configured for 5V fixed output instead of 3.3V | Used where 5V logic rails (e.g., USB PHY, SDIO) require tighter regulation than LDOs can provide | Select when system requires 5V output with identical thermal and layout footprint |
| TPS62933RTER | 3A output, 4.2V–18V input, 1.8MHz switching, 1.2µA IQ - lower IQ but narrower VIN range and no AEC-Q100 rating | Suitable for non-automotive industrial or consumer portable devices with strict battery-life targets | Choose only for non-automotive designs where 40V transient immunity and AEC-Q100 are not required |
Compared with MAX20077ATCA/VY+, the MAX20077ATCB/VY+ provides identical performance with factory-trimmed 3.3V output, while the TPS62933RTER trades automotive robustness for ultra-low IQ in less demanding environments.
Availability
MAX20077ATCB/VY+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment head units, telematics control units, and industrial CAN nodes requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for MAX20077ATCB/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 semiconductor leader specializing in high-performance analog, mixed-signal, and power management ICs for precision, reliability, and safety-critical systems.
The MAX20077 family is designed specifically for automotive power conversion-delivering compact, AEC-Q100-qualified buck regulators that replace multi-stage solutions in ADAS, body electronics, and infotainment subsystems.
FAQ
What output voltage does the MAX20077ATCB/VY+ deliver?
The MAX20077ATCB/VY+ is factory-trimmed for a fixed 3.3V output voltage with ±2% accuracy in forced-PWM mode. It does not require external resistors-FB is internally connected to BIAS. This 3.3V rail is optimized for automotive microcontrollers, sensors, and communication interfaces requiring tight regulation and low noise.
Does the MAX20077ATCB/VY+ support AEC-Q100 qualification?
Yes, the MAX20077ATCB/VY+ is AEC-Q100 qualified for Grade 1 (−40°C to +125°C ambient). It meets automotive reliability standards including 40V load-dump immunity, thermal shutdown at 175°C, and operation across full battery voltage range (3.5V–36V), making it suitable for front-end power in ADAS and body control modules.
What is the minimum on-time specification for the MAX20077ATCB/VY+?
The MAX20077ATCB/VY+ has a typical minimum on-time of 65ns. This enables direct regulation of 3.3V output from high-input conditions (e.g., 36V battery) without requiring a pre-regulator stage-reducing bill-of-materials count and board space in automotive applications.
How does the MAX20077ATCB/VY+ manage EMI in sensitive automotive environments?
The MAX20077ATCB/VY+ reduces radiated EMI through three mechanisms: 2.1MHz fixed-frequency operation (outside AM band), optional ±3% spread-spectrum modulation via the SPS pin, and integrated synchronous FETs eliminating external gate-drive noise. These features collectively meet CISPR 25 Class 5 requirements without added shielding or filtering.
Can the MAX20077ATCB/VY+ operate during automotive cold-crank conditions?
Yes, the MAX20077ATCB/VY+ operates down to 3.5V input and supports 99% duty cycle, enabling continuous regulation during cold-crank events where battery voltage drops to ~4.5V. Its undervoltage lockout (2.73V typ) ensures reliable startup once voltage recovers, and PGOOD provides sequenced enablement to downstream processors.
MAX20077ATCB/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)
MAX20077ATCB/VY+ FAQ
1.How can I place an order for MAX20077ATCB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20077ATCB/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 MAX20077ATCB/VY+ reliable?
The price and inventory of MAX20077ATCB/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20077ATCB/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20077ATCB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20077ATCB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20077ATCB/VY+?
MAX20077ATCB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20077ATCB/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 MAX20077ATCB/VY+?
For technical support, including MAX20077ATCB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20077ATCB/VY+ requirements.
6.How does Aetrix verify that MAX20077ATCB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20077ATCB/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 MAX20077ATCB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20077ATCB/VY+?
All MAX20077ATCB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20077ATCB/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 MAX20077ATCB/VY+ part is unused and in its original packaging.
Return procedure for MAX20077ATCB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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