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Analog Devices Inc./Maxim Integrated MAX20075ATCB/V+
- Part No.:
- MAX20075ATCB/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20075ATCB/V+.pdf
- Description:
- IC REG BUCK PROG/1V 600MA 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,714
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Product details
Overview
MAX20075ATCB/V+ from Analog Devices is a 36V, 0.6A synchronous buck converter with integrated high-side and low-side MOSFETs, fixed 3.3V output (±2% accuracy), 2.1MHz switching frequency, and AEC-Q100 qualification for automotive power rails. It operates from 3.5V to 36V input, supports 99% duty-cycle dropout operation, and delivers regulated 3.3V at up to 600mA for infotainment and ADAS domain controllers.
For engineers reviewing the MAX20075ATCB/V+ datasheet, MAX20075ATCB/V+ pinout, MAX20075ATCB/V+ application, or MAX20075ATCB/V+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal and protection specs, and real-world design implications of its 20ns minimum on-time, spread-spectrum EMI reduction, and PGOOD monitoring capability.
Technical Context
The MAX20075ATCB/V+ implements current-mode control with internal compensation, enabling stable regulation without external loop components. Its 20ns minimum on-time allows direct 3.3V generation from 36V automotive transients while maintaining 2.1MHz fixed-frequency operation in Forced-PWM (FPWM) mode only - SYNC must be tied to BIAS to enable internal clocking.
It integrates 300mΩ high-side and 200mΩ low-side MOSFETs, features 40V load-dump tolerance, -40°C to +125°C operating range, and thermal shutdown at 175°C with 15°C hysteresis. The device uses a dedicated analog ground (AGND) and power ground (PGND) separation, with strict layout requirements for BST capacitor placement and exposed-pad grounding to ensure thermal reliability under continuous 600mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 600mA max - sufficient for powering microcontrollers, sensors, and CAN transceivers in automotive ECUs without external current boosting. |
| Input Voltage Range | 3.5V to 36V - supports cold-crank (3.5V) and load-dump (40V transient) conditions per ISO 7637-2, eliminating need for pre-regulator stages. |
| Fixed Output Voltage | 3.3V ±2% - factory-trimmed accuracy enables direct powering of 3.3V logic without feedback resistor network or calibration. |
| Switching Frequency | 2.1MHz (typ) - enables use of compact 4.7µH inductors and 22µF ceramic output capacitors, reducing solution footprint by >40% vs. 500kHz converters. |
| Minimum On-Time | 66ns - allows 3.3V output regulation directly from 36V input (10.9:1 ratio) without pulse-skipping, ensuring clean FPWM operation across full VIN range. |
| Protection Features | 40V load-dump tolerance, overcurrent limit (1.2A typ), thermal shutdown (175°C), and PGOOD monitoring - meets ASIL-B functional safety readiness for non-safety-critical power domains. |
| Package & Thermal | 12-pin TDFN (3mm × 3mm) with exposed pad - θJA = 41°C/W on 4-layer board enables 600mA continuous operation at +125°C ambient without heatsink. |
Pinout & Package
MAX20075ATCB/V+ is housed in a 3mm × 3mm, 12-pin TDFN package with exposed thermal pad (EP), RoHS-compliant and automotive-qualified (AEC-Q100 Grade 1). The package uses side-wettable terminations for automated optical solder-joint inspection in automotive manufacturing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SPS | Spread-spectrum enable | Logic-high enables ±6% frequency modulation to reduce peak EMI emissions; internal 1MΩ pulldown ensures default disable on power-up. |
| 2 EN | High-voltage enable input | Accepts 0–36V logic; no internal pullup/pulldown - enables direct connection to automotive KEY or CAN inhibit signals without level-shifting. |
| 3 BST | Bootstrap supply for high-side driver | Requires 0.1µF ceramic capacitor to LX; critical for gate drive integrity during 99% duty-cycle dropout operation. |
| 4 SUP | Main input supply | 3.5V–36V input rail; requires 4.7µF low-ESR ceramic capacitor placed adjacent to pin to suppress high-frequency switching noise. |
| 5 LX | Switch node | Connects to 4.7µH inductor; internal clamp diodes to PGND/AGND/SUP require careful layout to avoid exceeding package power limits. |
| 6 PGND | Power ground return | Low-impedance path for high-current, high-frequency return currents from LX, SUP, and OUT - must be isolated from AGND except at single point. |
| 7 AGND | Analog ground reference | Return for FB, PGOOD, SYNC, SPS, and BIAS - connects to PGND only at output capacitor's ground terminal to prevent noise coupling. |
| 8 FB | Feedback input | Tied to BIAS internally for fixed 3.3V output; externally configurable via resistor divider for 1V–10V outputs (not used in ATCB/V+ variant). |
| 9 OUT | Regulated output | 3.3V output node; bypassed with 22µF ceramic capacitor to PGND - minimum 10µF required for stability with external resistive feedback. |
| 10 BIAS | Internal 5V bias supply | Provides 5V for internal circuitry and external pullup for PGOOD; requires ≥1µF ceramic capacitor to AGND for noise suppression. |
| 11 SYNC | Oscillator synchronization | Tied to BIAS to enable internal 2.1MHz FPWM operation; open or pulled low disables internal oscillator - not used in standard configuration. |
| 12 PGOOD | Open-drain power-good indicator | Active-high signal asserting when VOUT ≥ 93.5% of nominal (3.08V); requires external 20kΩ pullup to BIAS or system rail for power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates external MOSFETs and drivers - reduces BOM count by 6+ components and PCB area by >30% vs. controller-based solutions. |
| 2.1MHz fixed-frequency FPWM | Guarantees constant switching frequency across all loads, enabling predictable EMI filtering and avoiding AM-band interference (530–1710kHz). |
| 66ns minimum on-time | Enables single-stage 36V-to-3.3V conversion without pulse-skipping, preserving regulation accuracy and output ripple performance under wide VIN conditions. |
| AEC-Q100 Grade 1 qualification | Validated for -40°C to +125°C operation with 40V load-dump immunity and 95,000-hour lifetime at TJ = +125°C - suitable for front-end automotive power supplies. |
| Dedicated PGOOD and high-voltage EN | Enables robust power sequencing in multi-rail systems: EN accepts battery-level logic, PGOOD provides fail-safe reset signaling to MCU or PMIC. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in head-unit systems with 12V/24V battery input and stringent EMI limits. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering stable, low-noise power with PGOOD confirmation before SoC boot. Use Value: 2.1MHz switching avoids AM radio band; 66ns on-time eliminates need for intermediate 5V stage, reducing component count and thermal stress. |
Use Scenario: Supplies image sensor, ISP, and serializer in surround-view camera modules exposed to engine bay temperature extremes. IC Role / Device Role / Timing Role: High-reliability 3.3V source with 40V load-dump protection and thermal shutdown for unattended operation. Use Value: AEC-Q100 qualification and -40°C to +125°C operation ensure startup at cold crank and sustained function at under-hood temperatures. |
| Industrial Telematics Gateway | Commercial Vehicle Body Control |
|
Use Scenario: Provides 3.3V rail for LTE/CAN gateway MCU and cellular modem in fleet management units with wide-input DC/DC requirements. IC Role / Device Role / Timing Role: Input-transient-hardened buck converter supporting 9–36V vehicle bus with FPWM for deterministic EMI behavior. Use Value: 99% duty-cycle dropout maintains 3.3V output during 6V cold-crank events, preventing MCU brownout and communication loss. |
Use Scenario: Powers door module MCUs and LIN transceivers in heavy-duty truck body electronics subject to vibration and thermal cycling. IC Role / Device Role / Timing Role: Compact, thermally robust 3.3V regulator with side-wettable TDFN package for AOI-compatible reflow assembly. Use Value: Exposed pad and 41°C/W θJA enable 600mA delivery in confined enclosures without forced air or heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20076ATCB/V+ | 1.2A output current, identical pinout and package, same 3.3V ±2% accuracy and 2.1MHz FPWM operation. | Supports higher-current loads (e.g., dual-core MCUs, Ethernet PHYs) without redesign; shares layout and firmware compatibility. | Select when future-proofing for >600mA peak loads or consolidating BOM across 0.6A/1.2A variants. |
| TPS62130AQRGZRQ1 | 3.0V–17V input, 3A output, 2.5MHz switching, but lacks 40V load-dump rating and AEC-Q100 Grade 1 qualification. | Not rated for 24V commercial vehicle or 36V automotive transients; limited to 17V max input - requires upstream protection for battery-connected use. | Choose only for non-automotive industrial applications where input stays below 17V and 3A output is needed. |
Compared with MAX20075ATCB/V+, MAX20076ATCB/V+ offers double the output current in identical footprint and qualification, while TPS62130AQRGZRQ1 trades automotive ruggedness for higher current and frequency - making MAX20075ATCB/V+ optimal for cost- and space-constrained 600mA automotive rails requiring full ISO 7637-2 compliance.
Availability
MAX20075ATCB/V+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, telematics gateways, and commercial vehicle body control systems requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX20075ATCB/V+ 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, and communications markets with precision power, sensing, and signal chain solutions.
The MAX20075ATCB/V+ belongs to Analog Devices' automotive-qualified power management portfolio, designed specifically for compact, high-efficiency DC-DC conversion in harsh automotive environments with minimal external components.
FAQ
What is the maximum continuous output current of the MAX20075ATCB/V+?
The MAX20075ATCB/V+ delivers up to 600mA continuous output current at 3.3V under typical thermal conditions (θJA = 41°C/W on 4-layer board, TA ≤ +125°C). Derating applies above +70°C ambient - power dissipation must remain within 1951mW limit, with junction temperature capped at +150°C. This rating is validated per AEC-Q100 stress testing and matches the datasheet's "0.6A IOUT" specification for the MAX20075 family.
Does the MAX20075ATCB/V+ support adjustable output voltages?
No - the MAX20075ATCB/V+ is factory-configured for fixed 3.3V output with ±2% accuracy. While the MAX20075 family supports 1V–10V adjustment via external resistor divider on the FB pin, the ATCB/V+ suffix explicitly denotes the 3.3V fixed-output variant. For adjustable versions, refer to MAX20075ATCC/V+ (1V–3.6V) or MAX20075ATCA/V+ (5V or 3V–10V).
Can the MAX20075ATCB/V+ operate during automotive cold-crank conditions?
Yes - the MAX20075ATCB/V+ operates down to 3.5V input and supports 99% duty-cycle dropout mode, maintaining regulated 3.3V output even when input drops to 3.5V (cold-crank). Its undervoltage lockout threshold is 2.73V (typ), with hysteresis ensuring clean startup and shutdown. This capability is validated per ISO 16750-2 and enables reliable MCU power during engine cranking.
What package type and RoHS status does the MAX20075ATCB/V+ use?
The MAX20075ATCB/V+ uses a 12-pin TDFN package (3mm × 3mm) with exposed thermal pad, designated TD1233+2C per Maxim/Analog Devices package codes. The "+" indicates lead(Pb)-free and RoHS-compliant construction; "V" confirms AEC-Q100 automotive qualification; and "Y" is absent here, confirming standard (non-side-wettable) terminations - unlike VY+ variants.
Is spread-spectrum modulation enabled by default on the MAX20075ATCB/V+?
No - spread-spectrum modulation is disabled by default. The SPS pin has an internal 1MΩ pulldown resistor, so it remains logic-low at power-up unless actively driven high (e.g., by MCU GPIO or pullup). Enabling SPS adds ±6% frequency variation to the 2.1MHz clock, reducing peak radiated EMI by up to 10dB - useful for passing CISPR 25 Class 5 tests in automotive EMC validation.
MAX20075ATCB/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 10V
- Current - Output:
- 600mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
MAX20075ATCB/V+ FAQ
1.How can I place an order for MAX20075ATCB/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20075ATCB/V+ 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 MAX20075ATCB/V+ reliable?
The price and inventory of MAX20075ATCB/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20075ATCB/V+ is usually 5 days.
3.What payment methods are accepted for MAX20075ATCB/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20075ATCB/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20075ATCB/V+?
MAX20075ATCB/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20075ATCB/V+ 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 MAX20075ATCB/V+?
For technical support, including MAX20075ATCB/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20075ATCB/V+ requirements.
6.How does Aetrix verify that MAX20075ATCB/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20075ATCB/V+ 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 MAX20075ATCB/V+ meets industry standards.
7.What is the process for return or replacement of MAX20075ATCB/V+?
All MAX20075ATCB/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20075ATCB/V+, 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 MAX20075ATCB/V+ part is unused and in its original packaging.
Return procedure for MAX20075ATCB/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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