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Analog Devices Inc./Maxim Integrated MAX20077ATCB/VY+T
- Part No.:
- MAX20077ATCB/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20077ATCB/VY+T.pdf
- Description:
- IC REG BUCK ADJ 2.5A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,532
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Product details
Overview
MAX20077ATCB/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 3.5µA quiescent current at no load. It features fixed 3.3V output voltage with ±2% accuracy in forced-PWM mode, 20ns minimum on-time for high step-down ratios, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX20077ATCB/VY+T datasheet, MAX20077ATCB/VY+T pinout, MAX20077ATCB/VY+T application, or MAX20077ATCB/VY+T equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, automotive-grade protection features, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MAX20077ATCB/VY+T employs current-mode control architecture with internal compensation, eliminating external loop components. Its 20ns minimum on-time enables direct 3.3V regulation from automotive battery transients (e.g., 36V cold-crank), avoiding cascaded converters.
It operates at a fixed 2.1MHz switching frequency (typ) - enabling compact 2.2µH inductors and low-output-ripple designs - and supports forced-PWM or skip-mode via SYNC pin logic level. PGOOD monitoring, 40V load-dump tolerance, and 99% dropout duty cycle are tightly integrated into its control logic for robust automotive sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2.0A continuous - supports automotive infotainment and ADAS ECUs requiring stable 3.3V rail under transient loads |
| Input Voltage Range | 3.5V to 36V - covers full automotive battery range including cold-crank (−40°C) and load-dump (40V) |
| Output Voltage | Fixed 3.3V with ±2% accuracy in FPWM mode - eliminates external resistor divider and reduces BOM count |
| Quiescent Current | 3.5µA at no load - extends battery life in always-on vehicle modules (e.g., telematics, gateway wake-up circuits) |
| Switching Frequency | 2.1MHz (typ) - enables use of small 2.2µH inductor and avoids AM band interference (530–1710kHz) |
| Minimum On-Time | 20ns - allows direct 3.3V conversion from 36V input (10.9:1 ratio), removing need for pre-regulator stage |
| Protection Features | 40V load-dump tolerance, thermal shutdown at 175°C, overcurrent limit at 2.9A (±12%), and PGOOD with 92–93% threshold hysteresis |
Pinout & Package
MAX20077ATCB/VY+T is housed in a 3mm × 3mm, 12-pin side-wettable TDFN package (package code TD1233Y+2C) with exposed pad for thermal dissipation. The package supports automated optical inspection (AOI) and meets AEC-Q100 Grade 1 requirements (−40°C to +125°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SPS | Spread-spectrum enable | Pull high to reduce EMI radiated emissions by ±3% frequency modulation; internal 1MΩ pulldown ensures default disable |
| 2 EN | High-voltage enable input | Logic-compatible from 0.6V to 36V - accepts microcontroller GPIO or automotive KEY signal without level-shifting |
| 3 BST | Bootstrap supply for high-side gate driver | Requires 0.1µF ceramic capacitor to LX - enables efficient 100% duty-cycle operation during dropout |
| 4 SUP | Main power input | Accepts 3.5V–36V with 4.7µF ceramic bypass - withstands 40V transients per AEC-Q100 load-dump test |
| 5 LX | Switch node | Connects to inductor; high-impedance when disabled - internal clamp diodes protect against PGND/AGND/SUP forward bias |
| 6 PGND | Power ground | High-current return path for LX, OUT, and BST - must be separated from AGND to prevent noise coupling |
| 7 AGND | Analog ground | Reference for FB, PGOOD, SYNC, SPS - requires dedicated low-noise copper pour connected to PGND at single point |
| 8 FB | Feedback input | Internally tied to BIAS for fixed 3.3V output - 1.0V reference with ±1.5% accuracy enables precise external adjustment if needed |
| 9 OUT | Regulated output | 3.3V output node - bypassed with ≥44µF total effective capacitance (derated) for >60° phase margin |
| 10 BIAS | Internal 5V bias supply | Provides gate drive and internal circuitry power - requires 1µF ceramic to AGND; used as pullup for PGOOD |
| 11 SYNC | Mode selection clock input | Ground or open = skip mode (high efficiency at light load); connect to BIAS = forced-PWM (constant 2.1MHz, low EMI) |
| 12 PGOOD | Open-drain power-good indicator | Active-high signal pulled low when VOUT < 92% nominal - requires external 20kΩ pullup to BIAS or system rail |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous FET integration | Eliminates external diode and reduces conduction loss - achieves >90% efficiency at 1A/14VIN→3.3VOUT with 2.1MHz switching |
| Automotive-grade protection | 40V load-dump survival, −40°C to +125°C operating range, and AEC-Q100 qualification ensure reliability in engine bay and chassis-mounted modules |
| Dropout operation | 99% duty cycle enables regulation down to VIN − 0.1V - maintains 3.3V output even during 5V battery brownout |
| Ultra-low IQ standby | 3.5µA quiescent current at no load - meets ISO 16750-2 sleep current requirements for automotive body electronics |
| EMI mitigation | Pin-enabled spread-spectrum (SPS) and forced-PWM mode suppress peak radiated emissions - simplifies CISPR 25 Class 5 compliance |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers SoC, display interface, and audio codec in head-unit systems with wide input voltage swings during start-stop cycles. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying core logic and I/O rails; PGOOD coordinates system reset sequencing with MCU. Use Value: 20ns min-on-time enables direct 3.3V regulation from 12V battery without pre-regulator - reducing board space and thermal stress. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view cameras exposed to engine compartment temperature extremes. IC Role / Device Role / Timing Role: High-reliability 3.3V source with load-dump protection and thermal shutdown - critical for fail-safe camera operation. Use Value: 40V load-dump tolerance and AEC-Q100 Grade 1 rating ensure uninterrupted video stream during alternator surge events. |
| Telematics Control Unit (TCU) | Automotive Gateway ECU |
Use Scenario: Provides always-on 3.3V rail for cellular modem, GNSS receiver, and CAN transceivers in connected vehicle platforms. IC Role / Device Role / Timing Role: Low-IQ buck converter maintaining communication readiness during vehicle sleep mode (CAN bus active wake-up). Use Value: 3.5µA quiescent current meets OEM <5µA sleep budget - extending battery life during extended parking periods. |
Use Scenario: Generates 3.3V for microcontroller, Ethernet PHY, and multiple CAN FD interfaces in domain controller architectures. IC Role / Device Role / Timing Role: Central power management IC with PGOOD-driven power sequencing across multi-rail subsystems. Use Value: Fixed 3.3V output with ±2% accuracy eliminates calibration overhead - ensuring consistent timing margins for high-speed interfaces. |
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+T | Same 3.3V fixed output but rated for 2.0A with 20ns min-on-time; differs in soft-start time (3.5ms vs. 5ms) and current limit (2.9A vs. 3.5A) | Optimized for <1A loads with tighter input-to-output ratio constraints - e.g., low-power sensors where 20ns on-time is critical | Select MAX20077ATCC/VY+T only when 20ns min-on-time is required below 3V output; otherwise MAX20077ATCB/VY+T offers higher current headroom |
| TPS62933RTER | 3.3V fixed output, 3A rating, 2.5V–18V input, 1.8MHz switching, but lacks 40V load-dump protection and AEC-Q100 qualification | Targeted at industrial or consumer portable devices - not suitable for under-hood automotive deployment | Choose TPS62933RTER only for non-automotive applications requiring higher current and smaller solution size; MAX20077ATCB/VY+T remains mandatory for AEC-Q100-compliant designs |
Compared with MAX20077ATCC/VY+T, the MAX20077ATCB/VY+T provides higher current capability and broader input range, while TPS62933RTER trades automotive ruggedness for higher efficiency in benign environments - making MAX20077ATCB/VY+T the sole qualified choice for safety-critical vehicle subsystems.
Availability
MAX20077ATCB/VY+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, telematics control units, and gateway ECUs requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for MAX20077ATCB/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 connectivity solutions.
The MAX20077 family was designed specifically for automotive power management - delivering ultra-low IQ, wide VIN, and AEC-Q100-compliant buck conversion in miniature TDFN packages for space-constrained ECU designs.
FAQ
What is the maximum output current capability of the MAX20077ATCB/VY+T?
The MAX20077ATCB/VY+T delivers up to 2.0A continuous output current under typical conditions (TA = +25°C, VIN = 14V, VOUT = 3.3V). Its overcurrent limit is specified at 2.9A (±12%) with automatic hiccup-mode restart every 7ms during sustained overload - ensuring reliable operation in automotive modules like body controllers and sensor hubs where transient surges occur.
Does the MAX20077ATCB/VY+T support fixed 3.3V output without external resistors?
Yes, the MAX20077ATCB/VY+T is factory-trimmed for fixed 3.3V output. To activate this, connect the FB pin directly to the BIAS pin - no external resistor divider is required. This configuration achieves ±2% output voltage accuracy in forced-PWM mode across the 6V–18V input range, simplifying layout and improving long-term stability versus adjustable implementations.
How does the MAX20077ATCB/VY+T handle automotive load-dump transients?
The MAX20077ATCB/VY+T withstands 40V load-dump transients per ISO 7637-2 and AEC-Q100 stress testing. Its internal circuitry clamps SUP pin voltage and sustains operation without latch-up or damage. Combined with 99% dropout duty cycle and thermal shutdown at 175°C, it ensures uninterrupted 3.3V supply to critical ECUs during alternator surge events in modern vehicles.
What is the purpose of the SPS pin on the MAX20077ATCB/VY+T?
The SPS (Spread-Spectrum) pin on the MAX20077ATCB/VY+T enables ±3% frequency modulation of the 2.1MHz internal oscillator when pulled high. This reduces peak radiated EMI emissions - easing CISPR 25 Class 5 compliance for automotive modules. When left unconnected or low, spread-spectrum is disabled and the device operates at nominal frequency.
Can the MAX20077ATCB/VY+T operate in dropout mode, and what is its minimum dropout voltage?
Yes, the MAX20077ATCB/VY+T operates in dropout by sustaining 99% duty cycle - maintaining regulated 3.3V output even when input drops to ~3.33V. Its minimum dropout voltage is approximately 30mV at 2.0A load (calculated from RDS(on) of HS/LS FETs and current sense), enabling functionality during deep battery brownouts common in start-stop systems.
MAX20077ATCB/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)
MAX20077ATCB/VY+T FAQ
1.How can I place an order for MAX20077ATCB/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20077ATCB/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 MAX20077ATCB/VY+T reliable?
The price and inventory of MAX20077ATCB/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 MAX20077ATCB/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20077ATCB/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20077ATCB/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20077ATCB/VY+T?
MAX20077ATCB/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20077ATCB/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 MAX20077ATCB/VY+T?
For technical support, including MAX20077ATCB/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20077ATCB/VY+T requirements.
6.How does Aetrix verify that MAX20077ATCB/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20077ATCB/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 MAX20077ATCB/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20077ATCB/VY+T?
All MAX20077ATCB/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20077ATCB/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 MAX20077ATCB/VY+T part is unused and in its original packaging.
Return procedure for MAX20077ATCB/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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