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Analog Devices Inc./Maxim Integrated MAX5035DASA/V+
- Part No.:
- MAX5035DASA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX5035DASA/V+.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,330
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Product details
Overview
The MAX5035DASA/V+ from Maxim Integrated is an automotive-grade, adjustable-output, high-voltage step-down DC-DC converter with 7.5V–76V input range, 1A output current capability, fixed 125kHz PWM switching, and internal 0.4Ω high-side DMOS FET. It delivers regulated 1.25V–13.2V output voltage and operates across –40°C to +125°C for use in harsh-environment power supplies.
For engineers reviewing the MAX5035DASA/V+ datasheet, MAX5035DASA/V+ pinout, MAX5035DASA/V+ application, or MAX5035DASA/V+ equivalent, key selection criteria include its adjustable feedback architecture (1.22V reference), 270µA no-load quiescent current, automotive temperature qualification, integrated thermal shutdown (+160°C trip), and SO-8 package compatibility with high-voltage industrial and automotive power rails.
Technical Context
This voltage-mode buck regulator uses internal voltage feed-forward control and a monolithic high-voltage DMOS switch to maintain stable regulation across wide input transients. Its fixed-frequency PWM operation transitions automatically to pulse-skipping mode at light loads to sustain high efficiency and low IQ.
The device integrates internal frequency compensation, undervoltage lockout (5.2V typ), cycle-by-cycle current limiting (1.9A typ peak), hiccup-mode short-circuit protection, and a dedicated VD regulator (7.8V typ) for bootstrap gate drive. The FB pin senses output via external resistor divider with ±1.5% output voltage accuracy over temperature and line.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports direct connection to 24V/48V/72V industrial and automotive battery rails without pre-regulation. |
| Output Voltage Range | 1.25V to 13.2V (adjustable) - set by external resistive divider; FB reference = 1.221V (±2.4%) ensures tight output tolerance. |
| Max Output Current | 1A continuous - limited by thermal dissipation in SO-8 package (qJA = 170°C/W); derates above +70°C ambient. |
| Switching Frequency | 125kHz (fixed) - enables predictable EMI filtering and consistent inductor sizing; oscillator tolerance ±10%. |
| Quiescent Current | 270µA (typ) at no load - enables long-term standby operation in always-on automotive modules. |
| Shutdown Current | 10µA (typ) - reduces system leakage during deep sleep; ON/OFF threshold = 1.69V (rising) with 100mV hysteresis. |
| Thermal Shutdown | +160°C junction trip with +20°C hysteresis - prevents permanent damage during overload or poor heatsinking. |
Pinout & Package
MAX5035DASA/V+ is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and lead(Pb)-free, qualified for automotive temperature range (–40°C to +125°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor node | Connects 0.1µF ceramic cap to LX; supplies gate drive voltage for internal high-side DMOS switch. |
| VD | Internal regulator output | Provides ~7.8V bias for BST driver; bypassed to GND with 0.1µF ceramic capacitor. |
| SGND | Signal ground reference | Internal analog ground node; must be tied directly to system GND plane for stable feedback operation. |
| FB | Feedback input | Senses output voltage via external resistor divider; regulates to 1.221V reference; bias current < ±150nA. |
| ON/OFF | Enable/shutdown control | Logic-level input: >1.69V (rising) enables operation; <1.53V (falling) disables; 10nA input leakage. |
| GND | Power ground return | Main power return path for LX switch and internal regulators; connects to PCB star ground point. |
| VIN | Main input supply | Accepts 7.5V–76V; requires local low-ESR bypass capacitor (e.g., 68µF aluminum + 0.1µF ceramic). |
| LX | Switch node | Drives external inductor; swings from GND to VIN; requires short, low-inductance routing to minimize ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side DMOS FET | RDS(ON) = 0.4Ω (typ) - eliminates external MOSFET, reduces BOM count, and improves efficiency at full load. |
| Automotive temperature rating | –40°C to +125°C operating range - validated for under-hood and engine-control applications per AEC-Q100 stress requirements. |
| Pulse-skipping light-load mode | Reduces IQ to 270µA while maintaining >85% efficiency at 10mA load - extends battery life in always-on systems. |
| Internal frequency compensation | Eliminates external compensation network - simplifies design, improves stability margin, and reduces layout sensitivity. |
| Hiccup-mode short-circuit protection | Auto-restarts after fault clears - prevents thermal runaway during sustained output shorts without requiring manual reset. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power |
|---|---|
Use Scenario: Powering microcontrollers, CAN transceivers, and sensor interfaces in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator converting 12V/24V battery rail to logic-level supplies with high transient immunity. Use Value: 76V absolute max input withstands load-dump events; 270µA quiescent current meets ISO 16750-2 sleep-mode requirements. | Use Scenario: Generating isolated 5V or 12V rails for digital I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Non-isolated step-down converter supplying field-side logic and interface circuitry from 24V DC bus. Use Value: Adjustable output supports multiple downstream voltage standards; SO-8 package fits dense industrial PCB layouts. |
| Railway Signaling Power Supply | Off-Highway Equipment Telematics |
Use Scenario: Providing stable 5V power to microprocessors and wireless modems in trackside signaling units exposed to wide ambient swings. IC Role / Device Role / Timing Role: Main DC-DC stage converting 72V nominal traction battery to regulated logic supply. Use Value: –40°C to +125°C operation survives extreme outdoor environments; thermal shutdown protects against enclosure overheating. | Use Scenario: Powering GPS, cellular, and inertial sensors in construction and agricultural machinery with 24V/48V chassis batteries. IC Role / Device Role / Timing Role: High-efficiency buck converter delivering 3.3V or 5V to low-power edge AI processors and RF front-ends. Use Value: 90% efficiency at 500mA load minimizes heat in sealed enclosures; adjustable output accommodates evolving SoC voltage requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5017MH/NOPB | Fixed 5V/12V versions only; no adjustable output; 100V max input; 600mA output; requires external compensation. | Not suitable for designs requiring 1.25V–13.2V adjustment or >600mA load; better for ultra-high-input-voltage fixed-rail apps. | Select MAX5035DASA/V+ when adjustable output, 1A capability, and internal compensation are required. |
| TPS54260DGQR | Adjustable output (0.8V–60V); 2.6A output; 3.5V–60V input; external MOSFET drivers; higher IQ (145µA active, 13µA shutdown). | Higher current and wider input range but requires external high-side FET and compensation; larger solution size. | Choose MAX5035DASA/V+ for compact, integrated 1A solutions where 76V input and automotive temp are mandatory. |
Compared with LM5017MH/NOPB and TPS54260DGQR, the MAX5035DASA/V+ uniquely combines automotive temperature qualification, integrated 0.4Ω FET, adjustable 1.25V–13.2V output, and internal compensation in an SO-8 package-making it optimal for space-constrained, high-reliability 1A buck applications.
Availability
MAX5035DASA/V+ is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, railway signaling systems, and off-highway telematics requiring stable component supply with full AEC-Q100-aligned traceability.
Supply support for MAX5035DASA/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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX5035 product line delivers high-voltage, high-efficiency step-down converters optimized for automotive and industrial power conversion where wide input range, low quiescent current, and robust protection features are critical.
FAQ
What is the output voltage adjustment range supported by the MAX5035DASA/V+?
The MAX5035DASA/V+ supports an adjustable output voltage range from 1.25V to 13.2V, set using an external resistive divider on the FB pin. Its internal feedback reference is precisely 1.221V (±2.4%), enabling accurate regulation across the full range. This makes the MAX5035DASA/V+ suitable for powering diverse logic families and analog circuitry requiring non-standard supply voltages.
Does the MAX5035DASA/V+ require external compensation components?
No, the MAX5035DASA/V+ includes internal frequency compensation optimized for stability with standard output filter configurations. This eliminates the need for external compensation networks, reducing design complexity and PCB area. Engineers can implement the MAX5035DASA/V+ using only the recommended external components: input/output capacitors, inductor, Schottky diode, and FB divider resistors.
What protection features are integrated into the MAX5035DASA/V+?
The MAX5035DASA/V+ integrates undervoltage lockout (5.2V typ), cycle-by-cycle current limiting (1.9A typ peak), hiccup-mode output short-circuit protection, thermal shutdown (+160°C trip), and soft-start (400µs). These features ensure robust operation in harsh environments and prevent damage during fault conditions without requiring additional discrete protection circuitry.
How does the MAX5035DASA/V+ manage efficiency at light loads?
The MAX5035DASA/V+ automatically switches from fixed-frequency PWM mode to pulse-skipping mode at light loads, reducing quiescent current to 270µA (typ) at no load. This preserves high efficiency (>85% at 10mA) while minimizing standby power consumption-critical for automotive always-on modules and battery-backed industrial systems powered by the MAX5035DASA/V+.
Is the MAX5035DASA/V+ qualified for automotive applications?
Yes, the MAX5035DASA/V+ is explicitly qualified for automotive use, indicated by the "/V+" suffix: "/V" denotes AEC-Q100 automotive qualification, and "+" confirms lead(Pb)-free/RoHS compliance. It operates across –40°C to +125°C and meets stringent reliability and transient immunity requirements for under-hood and body electronics applications.
MAX5035DASA/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 7.5V
- Voltage - Input (Max):
- 76V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 13.2V
- Current - Output:
- 1A
- Frequency - Switching:
- 125kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX5035DASA/V+ FAQ
1.How can I place an order for MAX5035DASA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5035DASA/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 MAX5035DASA/V+ reliable?
The price and inventory of MAX5035DASA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5035DASA/V+ is usually 5 days.
3.What payment methods are accepted for MAX5035DASA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5035DASA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5035DASA/V+?
MAX5035DASA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5035DASA/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 MAX5035DASA/V+?
For technical support, including MAX5035DASA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5035DASA/V+ requirements.
6.How does Aetrix verify that MAX5035DASA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX5035DASA/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 MAX5035DASA/V+ meets industry standards.
7.What is the process for return or replacement of MAX5035DASA/V+?
All MAX5035DASA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5035DASA/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 MAX5035DASA/V+ part is unused and in its original packaging.
Return procedure for MAX5035DASA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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