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Analog Devices Inc./Maxim Integrated MAX20077ATCB2/VY+
- Part No.:
- MAX20077ATCB2/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20077ATCB2/VY+.pdf
- Description:
- IC REG BUCK ADJ 2.5A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,794
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Product details
Overview
MAX20077ATCB2/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 at 3.3V fixed output. It operates from 3.5V to 36V input, achieves ±2% output accuracy in FPWM mode, features 2.1MHz switching frequency, and consumes only 3.5µA quiescent current at no load-enabling always-on power rails in automotive body control modules.
For engineers reviewing the MAX20077ATCB2/VY+ datasheet, MAX20077ATCB2/VY+ pinout, MAX20077ATCB2/VY+ application, or MAX20077ATCB2/VY+ equivalent, key selection considerations include its AEC-Q100 qualification, 99% dropout capability, 3.3V fixed-output accuracy, side-wettable 12-pin TDFN package, and integrated PGOOD for power sequencing in harsh-environment embedded systems.
Technical Context
The MAX20077ATCB2/VY+ implements current-mode control with internal slope compensation and fixed 2.1MHz oscillator, enabling stable regulation across wide VIN–VOUT ratios. Its 65ns minimum on-time supports direct step-down from automotive battery (e.g., 12V→3.3V) without intermediate stages.
It integrates a 5V bias LDO, programmable soft-start (3.5ms), spread-spectrum modulation (±3%), and robust protection including 40V load-dump tolerance, thermal shutdown at 175°C, and overcurrent limiting at 2.9A (typ). The device enters skip mode below ~600mA load and transitions to ultra-low 3.5µA standby current when output load drops below ~5mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2.0A continuous - rated for sustained operation in automotive ambient up to +125°C junction temperature |
| Input Voltage Range | 3.5V to 36V - supports cold-crank (3.5V) and load-dump (40V transient) conditions per ISO 7637-2 |
| Fixed Output Voltage | 3.3V ±2% in FPWM mode - guaranteed accuracy over -40°C to +125°C, suitable for MCU I/O and sensor bias rails |
| Switching Frequency | 2.1MHz (typ) - enables use of compact 2.2µH inductor and reduces EMI in AM band-free spectrum |
| Quiescent Current | 3.5µA at no load - preserves battery life in always-on vehicle modules such as door ECUs and telematics |
| Package | 12-pin side-wettable TDFN (3mm × 3mm) - supports automated optical inspection (AOI) and improves solder joint reliability in automotive reflow |
| Protection Features | 40V load-dump tolerance, 99% duty-cycle dropout, thermal shutdown (175°C), and PGOOD monitoring - meets functional safety requirements for ASIL-B subsystems |
Pinout & Package
MAX20077ATCB2/VY+ uses a 12-pin side-wettable TDFN package (3mm × 3mm) with exposed pad for thermal dissipation. Pin 1 is SPS (spread-spectrum enable), Pin 2 is EN (high-voltage enable), Pin 3 is BST (bootstrap capacitor node), Pin 4 is SUP (input supply), Pin 5 is LX (switching node), Pin 6 is PGND (power ground), Pin 7 is AGND (analog ground), Pin 8 is FB (feedback), Pin 9 is OUT (output voltage sense), Pin 10 is BIAS (internal 5V bias rail), Pin 11 is SYNC (mode control), and Pin 12 is PGOOD (open-drain power-good signal).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SPS | Spread-spectrum enable input | Logic-high enables ±3% frequency dithering to reduce peak EMI emissions; internal 1MΩ pulldown ensures default disable |
| EN | High-voltage enable input | Accepts 0–40V logic; enables device when >2.4V; no internal pullup/pulldown minimizes leakage current |
| BST | Bootstrap capacitor connection | Requires 0.1µF ceramic capacitor to LX; sustains gate drive for high-side FET during 99% duty-cycle dropout operation |
| SUP | Main input supply rail | Connects to 4.7µF ceramic capacitor to PGND; withstands 40V transients per ISO 7637-2 |
| LX | Switching node | Drives external inductor; high-impedance when disabled; clamped internally to PGND/SUP to limit voltage stress |
| PGND / AGND | Separate power/analog grounds | PGND carries high-frequency switch current; AGND returns quiet analog signals (FB, SYNC, SPS); must be joined at single point |
| FB | Feedback reference input | 1.0V ±1.5% reference; connect to BIAS for 3.3V fixed output; resistor-divider enables 1V–10V adjustment |
| OUT | Output voltage sense node | Direct connection to output capacitor bank; bypass with low-ESR ceramics; used for remote sensing in high-current layouts |
| BIAS | Internal 5V bias supply | Provides regulated 5V for internal circuitry and external pullups (e.g., PGOOD); requires ≥1µF ceramic to AGND |
| SYNC | Mode control input | Ground or open = skip mode; connected to BIAS = forced PWM; internal 1MΩ pulldown sets default skip mode |
| PGOOD | Open-drain power-good flag | Asserts high when VOUT >93% nominal; deasserts at <92%; requires external 20kΩ pullup to BIAS or system rail |
| EP | Exposed thermal pad | Must be soldered to PCB ground plane; not electrically connected; primary path for heat conduction to board |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates need for external high-side/low-side MOSFETs and gate drivers-reducing BOM count and layout area by >30% |
| AEC-Q100 qualified | Rated for automotive Grade 1 (-40°C to +125°C) operation with full qualification testing-enables use in engine bay and chassis modules |
| 3.5µA no-load IQ | Enables >10-year battery hold-up time in always-on applications like smart entry receivers and CAN wake-up circuits |
| 2.1MHz fixed-frequency operation | Permits use of small 2.2µH inductors and low-profile 1210/0805 MLCCs-reducing solution footprint to <45mm² total area |
| 40V load-dump protection | Withstands ISO 7637-2 Pulse 5a (40V/100ms) without external TVS-removes need for discrete clamp diodes in cost-sensitive designs |
| Side-wettable TDFN package | Enables automated optical inspection of solder joints-critical for zero-defect automotive manufacturing and long-term field reliability |
Applications
| Automotive Body Control Module | Industrial Sensor Hub |
|---|---|
Use Scenario: Powering microcontroller, LIN transceiver, and door lock actuator driver from 12V battery in vehicle door module. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator providing clean, sequenced power with PGOOD confirmation before MCU boot. Use Value: 3.5µA IQ extends battery life during vehicle sleep mode; 40V load-dump tolerance prevents reset during alternator transients. | Use Scenario: Supplying 3.3V rail to MEMS accelerometers, pressure sensors, and RS-485 transceivers in factory-floor vibration monitor. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC-DC converter operating from 24V industrial bus with tight output regulation. Use Value: ±2% FPWM accuracy ensures sensor ADC reference stability; 2.1MHz switching avoids interference with sensitive analog front-end signals. |
| Telematics Control Unit (TCU) | Automotive Camera ECU |
Use Scenario: Generating 3.3V for LTE modem, GNSS receiver, and secure element in cellular-connected vehicle gateway. IC Role / Device Role / Timing Role: Always-on power stage supporting fast wake-from-sleep via EN pin; PGOOD coordinates SoC power-up sequence. Use Value: 99% dropout operation maintains 3.3V output during cold-crank (down to 3.5V VIN); spread-spectrum reduces conducted EMI into RF bands. | Use Scenario: Providing 3.3V to image sensor, ISP, and MIPI serializer in rear-view camera module mounted near bumper. IC Role / Device Role / Timing Role: Compact, thermally robust buck converter delivering stable rail despite under-hood temperature cycling and vibration. Use Value: Side-wettable TDFN ensures solder joint integrity over 15-year automotive lifetime; AEC-Q100 qualification validates reliability in high-shock environments. |
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+ | Same 3.3V fixed output, but rated for 2.5A output current and 65ns min on-time; identical pinout and package | Supports higher-current loads (e.g., multi-sensor clusters) without redesign; same thermal profile due to shared package | Select MAX20077ATCB/VY+ when output load exceeds 2.0A or when future-proofing for higher current headroom |
| TPS62933RQYR | 3.3V fixed output, 3A rating, 1.8V–14V input, 2.5MHz switching, but lacks AEC-Q100 qualification and 40V load-dump tolerance | Targeted at commercial/industrial applications; unsuitable for automotive front-end or battery-rail locations | Choose TPS62933RQYR only for non-automotive designs where extended input range and automotive qualification are not required |
Compared with MAX20077ATCB/VY+, the MAX20077ATCB2/VY+ offers identical functionality and pin compatibility but with reduced current rating optimized for cost-sensitive 2.0A applications; versus TPS62933RQYR, it provides automotive-grade ruggedness and transient immunity essential for vehicle deployment.
Availability
MAX20077ATCB2/VY+ is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and telematics control units requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for MAX20077ATCB2/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, communications, and healthcare markets with precision, reliability, and innovation.
The MAX20077 family is designed specifically for automotive power conversion-delivering compact, efficient, and robust DC-DC regulation for body electronics, ADAS sensors, and infotainment systems operating across extreme voltage and temperature conditions.
FAQ
What is the maximum output current rating for MAX20077ATCB2/VY+?
The MAX20077ATCB2/VY+ is rated for 2.0A continuous output current at 3.3V fixed output, validated over the full -40°C to +125°C junction temperature range and 3.5V to 36V input voltage range. This rating accounts for thermal derating in the 3mm × 3mm side-wettable TDFN package and includes margin for 40V load-dump transients. Peak current limit is 2.9A (typ) with ±12% tolerance.
Does MAX20077ATCB2/VY+ support adjustable output voltages?
Yes, the MAX20077ATCB2/VY+ supports externally adjustable output voltages from 1V to 10V using a resistor divider from OUT to FB to AGND, with FB referenced to an internal 1.0V ±1.5% bandgap. For fixed 3.3V operation, connect FB directly to BIAS. The device does not support factory-trimmed outputs other than 3.3V and 5V; all other values require external feedback.
How does the PGOOD signal behave on MAX20077ATCB2/VY+?
The PGOOD signal on MAX20077ATCB2/VY+ is an open-drain output that pulls low when VOUT falls below 92% of nominal (e.g., <3.036V for 3.3V output) and goes high-impedance when VOUT exceeds 93% (e.g., >3.069V). It includes 60µs debounce in PWM mode and requires an external 20kΩ pullup resistor to BIAS or another clean supply rail for proper logic-level assertion.
Is MAX20077ATCB2/VY+ qualified for automotive applications?
Yes, MAX20077ATCB2/VY+ is AEC-Q100 qualified for Grade 1 operation (-40°C to +125°C), includes 40V load-dump tolerance per ISO 7637-2, and supports 99% duty-cycle dropout operation-making it suitable for automotive body control modules, telematics units, and camera ECUs. Its side-wettable TDFN package also meets automotive AOI and solder-joint reliability requirements.
What is the purpose of the SPS pin on MAX20077ATCB2/VY+?
SPS (Spread-Spectrum Enable) on MAX20077ATCB2/VY+ controls internal frequency dithering: when pulled high, it modulates the 2.1MHz switching frequency by ±3% to reduce peak radiated EMI emissions. The pin has a 1MΩ internal pulldown, so it defaults to disabled. Spread spectrum is active only when the device uses its internal oscillator-not when synchronized externally via SYNC.
MAX20077ATCB2/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):
- 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+ FAQ
1.How can I place an order for MAX20077ATCB2/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20077ATCB2/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 MAX20077ATCB2/VY+ reliable?
The price and inventory of MAX20077ATCB2/VY+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX20077ATCB2/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20077ATCB2/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20077ATCB2/VY+?
MAX20077ATCB2/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20077ATCB2/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 MAX20077ATCB2/VY+?
For technical support, including MAX20077ATCB2/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20077ATCB2/VY+ requirements.
6.How does Aetrix verify that MAX20077ATCB2/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20077ATCB2/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 MAX20077ATCB2/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20077ATCB2/VY+?
All MAX20077ATCB2/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20077ATCB2/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 MAX20077ATCB2/VY+ part is unused and in its original packaging.
Return procedure for MAX20077ATCB2/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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