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Analog Devices Inc./Maxim Integrated MAX5035BASA/V+T
- Part No.:
- MAX5035BASA/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX5035BASA/V+T.pdf
- Description:
- IC REG BUCK 5V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,907
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Product details
Overview
The MAX5035BASA/V+T from Maxim Integrated is a high-voltage, 1A step-down DC-DC converter with fixed 5V output, operating from 7.5V to 76V input and consuming only 270µA quiescent current at no load. It integrates a 0.4Ω high-side DMOS FET, internal frequency compensation, and operates at a fixed 125kHz switching frequency with pulse-skipping mode for light-load efficiency. Used in automotive power supplies where wide VIN range and -40°C to +125°C operation are required.
For engineers reviewing the MAX5035BASA/V+T datasheet, MAX5035BASA/V+T pinout, MAX5035BASA/V+T application, or MAX5035BASA/V+T equivalent, key selection criteria include its 76V max input, 5V ±1.5% output accuracy over temperature and load, automotive-grade SO-8 package, hiccup-mode short-circuit protection, and thermal shutdown at +160°C.
Technical Context
This voltage-mode buck regulator uses feed-forward control and an internal high-side N-channel DMOS switch to maintain high efficiency across its full 7.5V–76V input range. Its fixed 125kHz PWM operation transitions automatically to pulse-skipping mode below ~85mA load to reduce IQ to 270µA.
Undervoltage lockout activates at 5.2V (typ), while ON/OFF control features a 1.69V rising threshold with 100mV hysteresis. Internal thermal shutdown triggers at +160°C with +20°C hysteresis, and short-circuit protection operates in hiccup mode with indefinite fault duration capability at VIN ≤ 40V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports 12V, 24V, and 48V industrial and automotive battery systems with headroom for transients. |
| Output Voltage | 5.0V ±1.5% (4.85V–5.15V) - tightly regulated for powering microcontrollers, sensors, and interface ICs. |
| Max Output Current | 1A - limited by package thermal dissipation (471mW at TA = +70°C in SO-8). |
| Quiescent Current | 270µA at no load - enables low-power always-on subsystems without excessive battery drain. |
| Switching Frequency | 125kHz (109–137kHz) - balances EMI, inductor size, and efficiency; fixed-frequency simplifies EMI filtering. |
| Thermal Shutdown | +160°C junction temperature - protects against sustained overload or poor heatsinking in enclosed environments. |
| Efficiency | 90% at VIN = 12V, IOUT = 0.5A - reduces heat generation and improves system-level power budget. |
Pinout & Package
MAX5035BASA/V+T is housed in an 8-pin SO (Small Outline) package rated for -40°C to +125°C operation, with lead(Pb)-free/RoHS-compliant finish indicated by the '+' suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Boost capacitor connection | Connects 0.1µF ceramic capacitor between BST and LX to generate gate drive for internal high-side DMOS switch. |
| VD | Internal regulator output | Provides ~7.8V bias for internal circuitry; must be bypassed to GND with 0.1µF ceramic capacitor. |
| SGND | Signal ground reference | Internal analog ground node; must be connected directly to system GND to ensure stable feedback and regulation. |
| FB | Feedback sense input | Connected directly to VOUT for fixed 5V version; regulates output using internal 1.22V reference. |
| ON/OFF | Shutdown control input | Pull low (<1.5V) to enter shutdown (10µA IQ); pull high (>1.85V) for normal operation with 100mV hysteresis. |
| GND | Power ground return | Main power return path for internal switch and external components; connect to SGND and system ground at single point. |
| VIN | Main input supply | Accepts 7.5V–76V; requires local low-ESR bypass capacitor (e.g., 68µF aluminum + 0.1µF ceramic) near pin. |
| LX | Switch node | Drives external Schottky diode (e.g., 50SQ100); connects to inductor and BST capacitor; handles high dV/dt switching. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.4Ω high-side DMOS FET | Eliminates need for external MOSFET and driver, reducing BOM count and PCB area while enabling >90% efficiency at 1A. |
| Internal frequency compensation | Enables stable loop response with minimal external components-no external compensation network required. |
| Hiccup-mode short-circuit protection | Prevents thermal runaway during sustained output shorts by cycling on/off until fault clears, allowing safe operation without external current limiting. |
| Automotive temperature range (-40°C to +125°C) | Qualified per AEC-Q100 stress test requirements; suitable for under-hood and engine-control module applications. |
| 10µA shutdown current | Supports ultra-low-power sleep modes in telematics and infotainment systems where standby current budgets are sub-20µA. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and sensor interfaces in door modules and lighting controllers exposed to battery transients up to 76V. IC Role / Device Role / Timing Role: Primary 5V buck regulator delivering clean, regulated power with transient immunity and thermal robustness. Use Value: Eliminates need for discrete high-voltage front-end stages; maintains regulation during cold-crank (6.5V) and load-dump (60V+) events. | Use Scenario: Supplies isolated 5V rails for digital I/O expansion cards in programmable logic controllers operating in factory environments. IC Role / Device Role / Timing Role: Central DC-DC converter providing stable 5V to multiple downstream LDOs and level shifters. Use Value: High efficiency reduces heat buildup in densely packed chassis; wide input accommodates 24V DC field wiring with margin. |
| Railway Signaling Interface | Off-Highway Vehicle Telematics |
Use Scenario: Powers communication interfaces (RS-485, Ethernet PHY) in trackside signaling units powered from 72V nominal traction batteries. IC Role / Device Role / Timing Role: Input-stage buck converter stepping down 72V battery to 5V for data processing and wireless modems. Use Value: 76V absolute maximum rating ensures survival during regenerative braking surges; hiccup protection prevents latch-up during cable faults. | Use Scenario: Supplies 5V to GPS/GNSS receivers, cellular modems, and inertial sensors in construction and agricultural vehicle telematics units. IC Role / Device Role / Timing Role: Main power converter in sealed, fanless enclosures requiring extended temperature operation and low standby consumption. Use Value: 270µA quiescent current extends battery backup runtime; -40°C to +125°C rating supports operation in unheated cab environments. |
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 |
|---|---|---|---|
| LM5008AMM/NOPB | Fixed 5V output, 100kHz switching, 75V max input, 500mA output, no integrated soft-start | Lower output current limits use in <500mA applications; lacks hiccup-mode short-circuit protection | Select when cost sensitivity outweighs 1A requirement and thermal fault tolerance is less critical. |
| TPS54360BQDDARQ1 | Adjustable output, 60V max input, 3.5A output, 100kHz–2.5MHz programmable frequency, integrated soft-start | Higher current and lower VIN limit; requires external feedback resistors and compensation | Choose when adjustable VOUT, higher output current, or frequency flexibility are needed-requires additional design effort. |
Compared with LM5008AMM/NOPB and TPS54360BQDDARQ1, the MAX5035BASA/V+T delivers guaranteed 1A output at 76V input with automotive qualification, hiccup protection, and zero-compensation design-making it optimal for space-constrained, thermally demanding 5V rail generation where reliability trumps configurability.
Availability
MAX5035BASA/V+T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, and railway signaling interfaces requiring stable component supply across extended temperature and high-input-voltage conditions.
Supply support for MAX5035BASA/V+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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX5035 product line delivers high-efficiency, high-voltage buck converters optimized for automotive and industrial systems where wide input range, thermal resilience, and minimal external components are essential.
FAQ
What is the maximum input voltage rating for the MAX5035BASA/V+T?
The MAX5035BASA/V+T has an absolute maximum input voltage rating of +80V, with continuous operation specified from 7.5V to 76V. This allows reliable use in 24V and 48V automotive and industrial systems, including scenarios with load-dump transients up to 76V. Exceeding +80V may cause permanent damage per the Absolute Maximum Ratings table.
Does the MAX5035BASA/V+T require external compensation components?
No, the MAX5035BASA/V+T includes internal frequency compensation optimized for stability with standard external components. The datasheet explicitly states "internal frequency compensation simplifying circuit implementation" and recommends no external compensation network-only a 0.1µF BST capacitor, 0.1µF VD bypass, and proper input/output filtering are required.
What protection features does the MAX5035BASA/V+T include?
The MAX5035BASA/V+T integrates undervoltage lockout (5.2V typ), cycle-by-cycle current limiting, hiccup-mode output short-circuit protection (indefinite duration at VIN ≤ 40V), and thermal shutdown at +160°C with +20°C hysteresis. These features enable robust operation in harsh environments without external protection circuitry.
Is the MAX5035BASA/V+T pin-compatible with other MAX5035 variants?
Yes, all MAX5035 variants-including MAX5035AASA/V+, MAX5035BASA/V+, and MAX5035CASA/V+-share identical 8-pin SO package footprints and pinouts. The only functional differences are output voltage (3.3V/5V/12V) and minor electrical tolerances; no PCB layout changes are needed when substituting within the same package option.
What is the typical quiescent current of the MAX5035BASA/V+T at no load?
The MAX5035BASA/V+T consumes 270µA typical quiescent current at no load across its full operating temperature range (-40°C to +125°C) and input voltage range (7.5V to 76V). This value is confirmed in the Electrical Characteristics table for MAX5035B under IQ conditions with VFB = 5.5V.
MAX5035BASA/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 7.5V
- Voltage - Input (Max):
- 76V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- 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
MAX5035BASA/V+T FAQ
1.How can I place an order for MAX5035BASA/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5035BASA/V+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 MAX5035BASA/V+T reliable?
The price and inventory of MAX5035BASA/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5035BASA/V+T is usually 5 days.
3.What payment methods are accepted for MAX5035BASA/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5035BASA/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5035BASA/V+T?
MAX5035BASA/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5035BASA/V+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 MAX5035BASA/V+T?
For technical support, including MAX5035BASA/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5035BASA/V+T requirements.
6.How does Aetrix verify that MAX5035BASA/V+T is sourced from the original manufacturer or authorized distributors?
All MAX5035BASA/V+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 MAX5035BASA/V+T meets industry standards.
7.What is the process for return or replacement of MAX5035BASA/V+T?
All MAX5035BASA/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5035BASA/V+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 MAX5035BASA/V+T part is unused and in its original packaging.
Return procedure for MAX5035BASA/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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