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Analog Devices Inc./Maxim Integrated MAX20075ATCA/V+
- Part No.:
- MAX20075ATCA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20075ATCA/V+.pdf
- Description:
- IC REG BUCK PROG/1V 600MA 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:280
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Product details
Overview
The MAX20075ATCA/V+ from Analog Devices is a 36V, 600mA synchronous buck converter with integrated high-side and low-side MOSFETs, fixed 5V 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% dropout duty cycle, and delivers stable regulation in engine control units and ADAS domain controllers.
For engineers reviewing the MAX20075ATCA/V+ datasheet, MAX20075ATCA/V+ pinout, MAX20075ATCA/V+ application, or MAX20075ATCA/V+ equivalent, key selection criteria include its 0.6A output capability, 20ns minimum on-time for high VIN-to-VOUT ratios, spread-spectrum EMI reduction via SPS pin, PGOOD monitoring, and side-wettable 3mm × 3mm TDFN package with exposed pad.
Technical Context
This current-mode-controlled buck regulator uses internal slope compensation and fixed-frequency PWM operation-no external compensation required. Its 2.1MHz oscillator enables compact 4.7µH inductor and 4.7µF input capacitor designs while avoiding AM band interference.
The device implements FPWM-only operation (SYNC tied to BIAS), features 99% dropout capability via periodic low-side FET activation, and integrates 40V load-dump protection with thermal shutdown at 175°C and 15°C hysteresis-critical for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 0.6A continuous-supports compact power rails for microcontrollers and sensors without external current boosting. |
| Input Voltage Range | 3.5V to 36V-covers cold-crank (3.5V) to load-dump (40V transient) conditions in 12V automotive systems. |
| Fixed Output Voltage | 5.0V ±2%-meets tight tolerance requirements for MCU I/O and analog subsystems without feedback resistor network. |
| Switching Frequency | 2.1MHz (typ)-enables small passive components and avoids AM radio band (0.53–1.71MHz). |
| Minimum On-Time | 66ns-allows direct 5V-to-1.8V conversion from 14V battery, eliminating need for cascaded regulators. |
| PGOOD Threshold | Rising at 93.5% VOUT-provides precise power-rail sequencing signal for downstream logic reset coordination. |
| Operating Temperature | −40°C to +125°C-fully qualified for engine bay and transmission control module placement. |
| AEC-Q100 Grade | Grade -40°C to +125°C ambient-certified for automotive safety-critical applications per AEC-Q100 Rev H. |
Pinout & Package
MAX20075ATCA/V+ is housed in a 3mm × 3mm, 12-pin side-wettable TDFN package (package code TD1233Y+2C) with exposed thermal pad connected to PGND. The package supports automated optical inspection (AOI) and improves solder joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SPS | Spread-spectrum enable | Logic-high activates ±6% frequency modulation to reduce peak EMI emissions; internal 1MΩ pulldown ensures default disable. |
| 2 EN | High-voltage enable input | Accepts 0–36V logic; no internal pullup/pulldown minimizes quiescent current; compatible with 3.3V MCU GPIO or KEY signal. |
| 3 BST | Bootstrap supply for HS gate driver | Requires 0.1µF ceramic capacitor to LX; critical for maintaining high-side FET gate drive during 99% duty-cycle dropout operation. |
| 4 SUP | Main power input | 3.5V–36V supply rail; requires 4.7µF low-ESR ceramic capacitor placed adjacent to pin for high-frequency decoupling. |
| 5 LX | Switch node | Connects to 4.7µH inductor; internal clamp diodes to PGND/AGND/SUP require careful layout to avoid exceeding power dissipation limits. |
| 6 PGND | Power ground return | Low-impedance path for high-current switching loops; must be connected directly to exposed pad and output capacitor negative terminal. |
| 7 AGND | Analog ground reference | Separate quiet ground for FB, BIAS, and PGOOD; joined to PGND only at single point-output capacitor return-to prevent noise coupling. |
| 8 FB | Feedback voltage sense | Internally tied to BIAS for fixed 5V output; externally configurable for 1V–10V using resistor divider with ±1.5% FB accuracy. |
| 9 OUT | Regulated output | Delivers 5V @ 0.6A; bypassed with 22µF ceramic capacitor to PGND for optimal phase margin (>70°) and transient response. |
| 10 BIAS | Internal 5V bias supply | Provides regulated 5V for internal circuitry; requires ≥1µF ceramic capacitor to AGND; used as pullup for PGOOD and FB reference. |
| 11 SYNC | Frequency synchronization input | Tied to BIAS to enable internal 2.1MHz FPWM mode; accepts external clock 1.7–2.6MHz if synchronized to system master clock. |
| 12 PGOOD | Open-drain power-good indicator | Active-high signal pulled low when VOUT drops below 93% nominal; requires external 20kΩ pullup to BIAS or system rail. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous buck with integrated FETs | Eliminates external MOSFETs and drivers-reduces BOM count by ≥6 components and board area by >40% vs discrete solutions. |
| 2.1MHz fixed-frequency PWM | Enables use of 4.7µH inductor and 4.7µF input cap-cuts total solution size to <25mm² while ensuring no AM-band interference. |
| 66ns minimum on-time | Supports direct 14V-to-1.8V conversion without pre-regulator-removes second-stage buck and associated efficiency loss (~8–12%). |
| PGOOD with 93.5% rising threshold | Enables precise power sequencing in multi-rail systems-avoids false resets during brown-out recovery or soft-start ramp. |
| 40V load-dump protection | Withstands ISO 7637-2 Pulse 5a transients without external TVS-reduces system-level protection component count and cost. |
| AEC-Q100 Grade 0 qualification | Validated for −40°C to +125°C operation with 95,000-hour lifetime at TJ = +125°C-meets ASIL-B functional safety prerequisites. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powers 3.3V/5V rails for MCU, CAN transceivers, and sensor interfaces in gasoline/diesel engine management modules. IC Role / Device Role / Timing Role: Primary 5V buck regulator delivering stable, low-noise supply with PGOOD sequencing for microcontroller boot integrity. Use Value: 40V load-dump tolerance eliminates need for upstream TVS; 99% dropout maintains operation during cranking (6V); AEC-Q100 compliance ensures field reliability. |
Use Scenario: Supplies 5V to radar SoCs and camera ISPs in front-facing ADAS domain controllers operating near engine compartments. IC Role / Device Role / Timing Role: High-efficiency, low-EMI 5V source enabling clean analog front-end performance and meeting CISPR 25 Class 5 radiated emissions limits. Use Value: Spread-spectrum modulation reduces 2.1MHz harmonic peaks by >10dBµV; 2.1MHz switching avoids interference with 77GHz radar LO harmonics. |
| Automotive Infotainment Head Unit | Body Control Module (BCM) |
Use Scenario: Generates 5V for display interface logic, audio codecs, and USB PHYs in centralized infotainment systems with wide input voltage variation. IC Role / Device Role / Timing Role: Fixed-output buck converter providing tightly regulated 5V with fast transient response to handle bursty display backlight and touch controller loads. Use Value: 20ns min-on-time allows direct 12V-to-5V conversion without intermediate stage; PGOOD enables safe processor reset during undervoltage events. |
Use Scenario: Powers 5V logic for LIN transceivers, door lock actuators, and interior lighting controllers in distributed body electronics networks. IC Role / Device Role / Timing Role: Compact, robust DC-DC supply supporting start-stop cycling and long-term under-hood thermal exposure. Use Value: −40°C to +125°C rating ensures operation across full vehicle lifecycle; side-wettable TDFN enables AOI verification for zero-defect manufacturing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20075ATCB/V+ | Fixed 3.3V output (±2%) instead of 5V; identical 0.6A rating, package, and feature set. | Used where 3.3V logic rails dominate (e.g., FPGA I/O banks, low-voltage sensors), not 5V MCU peripherals. | Select MAX20075ATCB/V+ only when system requires 3.3V-not 5V-as primary regulated rail. |
| MAX20076ATCA/V+ | 1.2A output current, same 5V ±2% accuracy, identical pinout and package; higher RDS(on) (HS: 300–550mΩ vs 400–650mΩ). | Supports higher-power loads like Ethernet PHYs or multi-core MCUs; requires larger inductor and output cap due to higher ripple current. | Choose MAX20076ATCA/V+ when load exceeds 0.6A but PCB layout and thermal budget allow 1.2A capability. |
Compared with MAX20075ATCB/V+, the MAX20075ATCA/V+ provides 5V output essential for legacy MCU peripherals and CAN transceivers, while MAX20076ATCA/V+ offers double current headroom at identical footprint-making MAX20075ATCA/V+ optimal for cost- and space-constrained 5V/0.6A automotive sub-systems.
Availability
MAX20075ATCA/V+ is available at Aetrix Electronics and suitable for automotive engine control units, ADAS domain controllers, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX20075ATCA/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, communications, and healthcare markets since 1965.
The MAX20075ATCA/V+ belongs to Analog Devices' automotive-grade power management portfolio, designed specifically for robust, low-EMI DC-DC conversion in harsh under-hood and chassis-mounted electronic control units.
FAQ
What is the maximum input voltage transient the MAX20075ATCA/V+ can withstand?
The MAX20075ATCA/V+ supports 40V load-dump transients per ISO 7637-2 Pulse 5a, with absolute maximum SUP rating of 40V for ≤1s. This allows direct connection to automotive battery rails without external TVS diodes in most standard 12V systems. The device remains functional during cranking (down to 3.5V) and recovers cleanly after transient events. Designers should verify PCB layout thermal relief and input capacitor surge rating for sustained 40V exposure.
Does the MAX20075ATCA/V+ support adjustable output voltages?
Yes-the MAX20075ATCA/V+ supports both fixed 5V output (via FB tied to BIAS) and externally adjustable outputs from 1V to 10V using a resistor divider from OUT to FB to AGND. For adjustable operation, FB voltage accuracy is ±1.5%, and RFB2 (to AGND) must be ≤500kΩ. The MAX20075ATCA/V+ datasheet provides the formula RFB1 = RFB2 × [(VOUT/1V) − 1] for precise setting.
What is the purpose of the SPS pin on the MAX20075ATCA/V+?
The SPS (Spread-Spectrum) pin on the MAX20075ATCA/V+ enables ±6% frequency modulation of the internal 2.1MHz oscillator when driven high, reducing peak radiated EMI by spreading energy across a wider bandwidth. It has a 1MΩ internal pulldown, so it defaults to disabled. SPS modulation is active only in internally clocked FPWM mode-not when SYNC is driven externally-and does not affect PGOOD timing or regulation accuracy.
How does the MAX20075ATCA/V+ behave during dropout conditions?
During dropout-when input voltage approaches output voltage-the MAX20075ATCA/V+ operates at up to 99% duty cycle by periodically turning off the high-side FET for ~200ns every 20µs to recharge the BST capacitor. This maintains gate drive integrity while sustaining regulation. The effective switching frequency drops to ~50kHz in deep dropout, but output voltage remains within ±2% and PGOOD stays asserted as long as VOUT ≥ 93% of nominal.
Is the MAX20075ATCA/V+ pin-compatible with other devices in the MAX20075/MAX20076 family?
Yes-the MAX20075ATCA/V+ shares identical 12-pin side-wettable TDFN package (TD1233Y+2C), pinout, and footprint with MAX20075ATCB/V+, MAX20075ATCC/V+, and MAX20076 variants. This enables drop-in replacement for 3.3V or adjustable-output versions, or upgrade to 1.2A current capability using MAX20076ATCA/V+, provided thermal and inductor current ratings are verified for the new operating point.
MAX20075ATCA/V+ 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:
- 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)
MAX20075ATCA/V+ FAQ
1.How can I place an order for MAX20075ATCA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20075ATCA/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 MAX20075ATCA/V+ reliable?
The price and inventory of MAX20075ATCA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20075ATCA/V+ is usually 5 days.
3.What payment methods are accepted for MAX20075ATCA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20075ATCA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20075ATCA/V+?
MAX20075ATCA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20075ATCA/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 MAX20075ATCA/V+?
For technical support, including MAX20075ATCA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20075ATCA/V+ requirements.
6.How does Aetrix verify that MAX20075ATCA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20075ATCA/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 MAX20075ATCA/V+ meets industry standards.
7.What is the process for return or replacement of MAX20075ATCA/V+?
All MAX20075ATCA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20075ATCA/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 MAX20075ATCA/V+ part is unused and in its original packaging.
Return procedure for MAX20075ATCA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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