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Analog Devices Inc./Maxim Integrated MAX20077ATCB2/VY+T
- Part No.:
- MAX20077ATCB2/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20077ATCB2/VY+T.pdf
- Description:
- IC REG BUCK ADJ 2.5A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,296
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Product details
Overview
MAX20077ATCB2/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 (±2% accuracy in FPWM mode), 2.1MHz switching frequency, 20ns minimum on-time, and AEC-Q100 qualification for automotive power rails.
For engineers reviewing the MAX20077ATCB2/VY+T datasheet, MAX20077ATCB2/VY+T pinout, MAX20077ATCB2/VY+T application, or MAX20077ATCB2/VY+T equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade operating parameters (–40°C to +125°C, 40V load-dump tolerance), and real-world design implications of its spread-spectrum EMI reduction, PGOOD monitoring, and dropout operation at 99% duty cycle.
Technical Context
This device implements current-mode control with internal compensation, eliminating external loop components. Its 20ns minimum on-time enables direct step-down from automotive battery (e.g., 12V) to sub-3V rails like 1.8V or 2.5V without cascaded converters.
The IC integrates a high-voltage EN input (compatible with 3.3V logic or battery-level signals), programmable soft-start (3.5ms typical), and dual-mode operation: forced PWM (FPWM) when SYNC is tied to BIAS, or pulse-skipping for ultra-low IQ at light loads. Spread-spectrum modulation (±3%) is enabled via the SPS pin and active only during internally generated 2.1MHz operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2.0A continuous - supports automotive infotainment and ADAS subsystems requiring stable 3.3V rail under cold-crank conditions. |
| Input Voltage Range | 3.5V to 36V - accommodates 12V/24V automotive systems and handles 40V load-dump transients without external protection. |
| Output Voltage | Fixed 3.3V ±2% (FPWM mode) - eliminates external feedback resistors for simplified layout and production calibration. |
| Quiescent Current | 3.5µA at no load - extends battery life in always-on vehicle modules (e.g., telematics, CAN gateways). |
| Switching Frequency | 2.1MHz (typical) - enables use of small 2.2µH inductors and reduces EMI in AM radio band (530–1710kHz). |
| Minimum On-Time | 20ns - allows direct conversion from 12V input to 1.8V/2.5V outputs, avoiding inefficient two-stage designs. |
| Duty Cycle Max | 99% - sustains regulation during automotive cold-crank (down to ~3.5V input) with minimal voltage drop. |
| Operating Temp | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and body-control module deployment. |
Pinout & Package
MAX20077ATCB2/VY+T uses a 3mm × 3mm, 12-pin side-wettable TDFN package (package code TD1233Y+2C) with exposed thermal pad connected to PCB ground plane for enhanced thermal dissipation in high-power-density automotive layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SPS | Spread-spectrum enable | Pull high to activate ±3% frequency dithering for EMI reduction; internal 1MΩ pulldown ensures default disable. |
| 2 EN | High-voltage enable input | Logic-compatible with 3.3V microcontrollers or direct battery connection; no internal pullup/pulldown preserves ultra-low IQ. |
| 3 BST | Bootstrap supply for HS FET gate driver | Requires 0.1µF ceramic capacitor to LX; critical for maintaining gate drive during 99% duty-cycle dropout operation. |
| 4 SUP | Main input supply | Accepts 3.5V–36V; requires 4.7µF ceramic capacitor to PGND for transient stability during load-dump events. |
| 5 LX | Switch node | Connects to inductor; high-impedance when disabled; internal clamp diodes protect against overvoltage during startup/faults. |
| 6 PGND | Power ground | Return path for high-current switching loops; must be separated from AGND to prevent noise coupling into feedback. |
| 7 AGND | Analog ground | Reference for FB, PGOOD, and internal bias; connects to clean ground plane near BIAS and FB pins. |
| 8 FB | Feedback input | Internally tied to BIAS for fixed 3.3V output; externally configurable for 1V–10V using resistor divider (±1.5% FB accuracy). |
| 9 OUT | Regulated output | Delivers 3.3V; bypassed with ≥30µF effective capacitance (derated) for phase margin >60° and ripple suppression. |
| 10 BIAS | Internal 5V bias supply | Provides regulated 5V for internal circuitry and optional PGOOD pullup; requires ≥1µF ceramic cap to AGND. |
| 11 SYNC | Mode selection / synchronization | Ground or open → skip mode; tie to BIAS → forced PWM; accepts external clock (1.7–2.6MHz) 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 for system power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates external MOSFETs and drivers - reduces BOM count, board area, and layout complexity for space-constrained ECUs. |
| AEC-Q100 Grade 1 qualification | Validated for automotive environments including extended temperature cycling, humidity, and mechanical shock per ISO 16750. |
| 40V load-dump protection | Withstands ISO 7637-2 Pulse 5a transients without external TVS - simplifies front-end protection design for 12V systems. |
| PGOOD with 60µs debounce | Ensures reliable power sequencing in multi-rail systems by preventing false resets during brief output dips or startup overshoot. |
| Fixed 3.5ms soft-start | Prevents inrush current damage to input capacitors and downstream loads during cold-start or reset conditions. |
| Current-mode control architecture | Provides inherent cycle-by-cycle current limiting and fast transient response (<10µs) to load steps without external compensation. |
Applications
| Automotive Infotainment | ADAS Camera Power |
|---|---|
Use Scenario: Powering SoC I/O, display interface, and audio codecs in head-unit systems with wide input voltage variation (6V–16V). IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying low-noise, tightly regulated power to sensitive digital interfaces. Use Value: 20ns min on-time enables direct 12V→3.3V conversion, reducing component count vs. two-stage solutions; 3.5µA IQ extends standby time for voice-wake functionality. |
Use Scenario: Providing stable 3.3V rail to CMOS image sensors and ISP processors in surround-view or forward-facing cameras. IC Role / Device Role / Timing Role: High-reliability point-of-load converter with PGOOD monitoring for fault-aware camera boot sequences. Use Value: AEC-Q100 qualification and –40°C to +125°C operation ensure consistent performance in engine-bay-mounted modules; 99% duty cycle maintains regulation during cranking. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Generating 3.3V for microcontroller, CAN transceivers, and sensor interfaces in door modules or lighting controllers. IC Role / Device Role / Timing Role: Compact, robust DC-DC stage replacing discrete regulators to meet stringent EMC and thermal requirements. Use Value: Spread-spectrum modulation (SPS pin) lowers peak radiated emissions by >10dB in 100–500MHz band - easing CISPR 25 Class 5 compliance. |
Use Scenario: Supplying always-on 3.3V rail to cellular modem, GNSS receiver, and secure element in vehicle connectivity units. IC Role / Device Role / Timing Role: Ultra-low IQ buck converter enabling multi-year battery backup for GPS tracking during vehicle sleep modes. Use Value: 3.5µA quiescent current at no load minimizes parasitic drain on backup battery; PGOOD enables controlled wake-up upon network event detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20077ATCB/VY+T | Same 3.3V fixed output, but 2.5A rated; 65ns min on-time; 3.5ms soft-start | Higher current capability suits systems with future-proofing headroom or higher transient loads | Select when >2.0A peak load is expected or when compatibility with legacy MAX20077ATCB designs is required. |
| LM61480QWRNXTQ1 | 3.3V fixed, 5A output, 4.2V–36V input, 15µA IQ, 2.1MHz, AEC-Q100 | Larger solution size due to larger package (3.5mm × 4.5mm WQFN); higher IQ impacts ultra-low-power sleep modes | Choose when higher output current or broader input range (down to 4.2V) is needed, accepting trade-off in quiescent current and footprint. |
Compared with MAX20077ATCB2/VY+T, the MAX20077ATCB/VY+T offers higher current headroom at identical footprint and IQ, while the LM61480QWRNXTQ1 provides greater current and input flexibility at the cost of higher standby consumption and larger PCB area.
Availability
MAX20077ATCB2/VY+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, body control units, and telematics systems requiring stable component supply with AEC-Q100 assurance and long-term production continuity.
Supply support for MAX20077ATCB2/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 power management semiconductors, serving automotive, industrial, and communications markets with rigorously tested, reliability-validated components.
The MAX20077 family was designed specifically for automotive power conversion - emphasizing ultra-low IQ, wide VIN range, AEC-Q100 compliance, and integrated protection to replace multi-component discrete solutions in ECU and domain controller designs.
FAQ
What is the maximum output current capability of the MAX20077ATCB2/VY+T?
The MAX20077ATCB2/VY+T is rated for 2.0A continuous output current under recommended operating conditions (–40°C to +125°C, 2.1MHz switching). This rating is confirmed in the Electrical Characteristics table for the ATCC/VY+ variant group, which includes MAX20077ATCB2/VY+T. Peak current limit is 2.9A ±12%, providing short-circuit protection without external current-sense components.
Does the MAX20077ATCB2/VY+T support adjustable output voltages?
No - the MAX20077ATCB2/VY+T is factory-trimmed for fixed 3.3V output. While the MAX20077 family supports 1V–10V adjustment via external resistor divider on the FB pin, this configuration applies only to variants explicitly designated for adjustable operation (e.g., MAX20077ATCA/VY+). The ATCB2/VY+T variant ties FB internally to BIAS and does not support external feedback programming.
How does the MAX20077ATCB2/VY+T handle automotive load-dump transients?
The MAX20077ATCB2/VY+T withstands 40V load-dump transients (per ISO 7637-2 Pulse 5a) without external protection components. Its absolute maximum SUP rating is +40V, and internal circuitry remains functional during these events. This eliminates the need for external TVS diodes in many 12V automotive applications, reducing bill-of-materials and board space.
What is the purpose of the SPS pin on the MAX20077ATCB2/VY+T?
The SPS (Spread-Spectrum) pin on the MAX20077ATCB2/VY+T enables ±3% frequency modulation of the internal 2.1MHz oscillator to reduce peak radiated EMI. When pulled high, it activates dithering; when low or floating (due to internal 1MΩ pulldown), spread-spectrum is disabled. This feature operates only during internally generated switching - it does not interfere with external SYNC clocking.
Is the MAX20077ATCB2/VY+T compatible with forced PWM (FPWM) mode?
Yes - the MAX20077ATCB2/VY+T supports forced PWM mode by connecting the SYNC pin to the BIAS pin (5V). In FPWM mode, the device maintains constant 2.1MHz switching across all load conditions, improving EMI predictability and reducing beat-frequency artifacts. This contrasts with skip mode (SYNC grounded), which optimizes efficiency at light loads by reducing switching frequency.
MAX20077ATCB2/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):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 10V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 12-TDFN-EP (3x3)
MAX20077ATCB2/VY+T FAQ
1.How can I place an order for MAX20077ATCB2/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20077ATCB2/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 MAX20077ATCB2/VY+T reliable?
The price and inventory of MAX20077ATCB2/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 MAX20077ATCB2/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20077ATCB2/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20077ATCB2/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20077ATCB2/VY+T?
MAX20077ATCB2/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20077ATCB2/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 MAX20077ATCB2/VY+T?
For technical support, including MAX20077ATCB2/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20077ATCB2/VY+T requirements.
6.How does Aetrix verify that MAX20077ATCB2/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20077ATCB2/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 MAX20077ATCB2/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20077ATCB2/VY+T?
All MAX20077ATCB2/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20077ATCB2/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 MAX20077ATCB2/VY+T part is unused and in its original packaging.
Return procedure for MAX20077ATCB2/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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