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Analog Devices Inc./Maxim Integrated MAX5035CUPA
- Part No.:
- MAX5035CUPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX5035CUPA.pdf
- Description:
- IC REG BUCK 12V 1A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,249
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Product details
Overview
MAX5035CUPA from Maxim Integrated is a high-voltage, 12V fixed-output, step-down DC-DC converter IC operating from 15V to 76V input, delivering up to 1A output current with 94% peak efficiency at 24VIN/0.5A, 270µA no-load quiescent current, and integrated 0.4Ω high-side DMOS FET - designed for automotive power conversion in engine control units and battery management systems.
For engineers reviewing the MAX5035CUPA datasheet, MAX5035CUPA pinout, MAX5035CUPA application, or MAX5035CUPA equivalent, key selection criteria include its -40°C to +125°C automotive temperature range, 125kHz fixed-frequency PWM operation with pulse-skipping mode, internal frequency compensation, undervoltage lockout (5.2V typ), and thermal shutdown at +160°C.
Technical Context
The MAX5035CUPA implements voltage-mode control with feed-forward compensation and integrates a high-voltage N-channel DMOS switch rated for 76V input. Its internal regulator supplies 7.8V (typ) to the BST capacitor for gate drive, enabling efficient high-side switching without external bias circuitry.
It features cycle-by-cycle current limiting (1.9A typ), hiccup-mode short-circuit protection, and automatic transition between PWM and pulse-skipping modes based on load - maintaining >85% efficiency down to 10mA load while holding VOUT regulation within ±3.5% over full temperature and line ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 15V to 76V - supports wide automotive battery transients including cold-crank (≥6.5V UVLO threshold recommended) |
| Output Voltage | Fixed 12V ±3.5% - tightly regulated across 20mA–1A load and -40°C to +125°C |
| Max Output Current | 1A continuous - limited by package thermal dissipation (727mW in PDIP @ +70°C) |
| Switching Frequency | 125kHz (109–137kHz range) - enables compact magnetics and predictable EMI profile |
| Quiescent Current | 270µA at no load - enables always-on subsystems in vehicle body electronics |
| Shutdown Current | 10µA typ - meets low-power sleep-state requirements for infotainment and telematics |
| Thermal Shutdown | +160°C junction with 20°C hysteresis - provides robust fault recovery under sustained overload |
Pinout & Package
MAX5035CUPA is housed in an 8-pin plastic DIP package (PDIP) with through-hole mounting and JEDEC-standard thermal characteristics (θJA = 110°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor connection | Supplies gate-drive voltage to internal high-side DMOS; requires 0.1µF ceramic cap to LX |
| VD | Internal regulator output | Provides ~7.8V bias for BST driver; bypassed with 0.1µF ceramic to GND |
| SGND | Signal ground reference | Must be connected to system GND; separates analog and power return paths |
| FB | Feedback sense node | Internally tied to 12V output; no external divider required for MAX5035C variant |
| ON/OFF | Enable/shutdown control | Logic-high (>1.69V) enables operation; logic-low (<1.53V) reduces supply current to 10µA |
| GND | Power ground | Main return path for high-current switch node; must connect to SGND at single point |
| VIN | Main input supply | Accepts 15–76V; requires low-ESR input capacitor placed adjacent to pin |
| LX | Switch node | Drives external Schottky diode (e.g., 50SQ100); connects to BST capacitor and inductor |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side DMOS FET | 0.4Ω RDS(ON) enables high efficiency without external MOSFET or gate driver |
| Internal frequency compensation | Eliminates need for external compensation network - simplifies design and improves stability margin |
| Pulse-skipping light-load mode | Maintains >85% efficiency at 10mA load while reducing IQ to 270µA |
| Automotive-grade thermal protection | +160°C shutdown with +140°C restart hysteresis ensures reliable operation in under-hood environments |
| Undervoltage lockout (UVLO) | 5.2V internal threshold prevents erratic startup during battery brownouts |
Applications
| Engine Control Unit (ECU) Power Supply | Advanced Driver Assistance Systems (ADAS) Camera Module |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and sensor interface in gasoline/diesel engine control units exposed to 12V/24V battery rails with load dump transients. IC Role / Device Role / Timing Role: Primary 12V buck regulator providing stable, low-noise supply with fast transient response to handle injector solenoid switching. Use Value: Withstands 76V transients and maintains regulation during cranking (≥6.5V UVLO setting), eliminating need for external TVS or pre-regulator stages. | Use Scenario: Supplies image sensor and ISP in rear-view or surround-view camera modules mounted near vehicle exterior. IC Role / Device Role / Timing Role: High-efficiency 12V step-down converter powering CMOS image sensor and video processor with minimal thermal rise in sealed housing. Use Value: 94% peak efficiency at 0.5A reduces heat generation; -40°C to +125°C rating ensures reliability in extreme ambient conditions. |
| Vehicle Telematics Control Unit (TCU) | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Provides clean 12V rail for cellular modem, GNSS receiver, and MCU in always-connected fleet management systems. IC Role / Device Role / Timing Role: Always-on power converter supporting low-power sleep states with 10µA shutdown current and fast wake-up capability. Use Value: 270µA quiescent current extends battery backup runtime; ON/OFF pin enables precise software-controlled power sequencing. | Use Scenario: Powers torque and position sensors in electric power steering systems where EMI immunity and functional safety are critical. IC Role / Device Role / Timing Role: Isolated 12V supply stage feeding isolated ADC and signal conditioning circuitry downstream of transformer-based isolation. Use Value: Fixed 12V output eliminates resistor tolerance errors; hiccup-mode short-circuit protection prevents latch-up during sensor cable faults. |
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 | 4.5–75V input, adjustable output, 500mA max, no integrated VD regulator | Requires external bias for bootstrap; lower current rating limits use in 1A loads | Select when adjustable output and smaller footprint (8-pin VSSOP) outweigh current and integration needs |
| TPS54160DGQ | 3.5–60V input, adjustable output, 1.5A max, integrated soft-start, no VD regulator | Higher current but narrower VIN range; lacks internal regulator for BST drive | Prefer for designs needing >1A or programmable soft-start, but requires external 7.5V bias source for high-side gate |
Compared with LM5008AMM/NOPB and TPS54160DGQ, the MAX5035CUPA offers fixed 12V output with no external feedback components, integrated VD regulator for self-contained bootstrap operation, and guaranteed 1A delivery across automotive temperature range - reducing BOM count and layout complexity in space-constrained ECU modules.
Availability
MAX5035CUPA is available at Aetrix Electronics and suitable for automotive power conversion, industrial control power supplies, and distributed power architectures requiring stable component supply across extended temperature and high-input-voltage conditions.
Supply support for MAX5035CUPA 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 targeting automotive subsystems requiring robust operation across battery voltage extremes and under-hood thermal stress.
FAQ
What is the maximum input voltage rating for the MAX5035CUPA?
The MAX5035CUPA has an absolute maximum input voltage rating of +80V, with operational specification from 15V to 76V. This allows safe operation during automotive load-dump events (up to +65V per ISO 7637-2) and cold-crank conditions. Exceeding 76V may trigger undervoltage lockout or reduce long-term reliability, and operation above +80V risks permanent damage per the Absolute Maximum Ratings table.
Does the MAX5035CUPA require external compensation components?
No, the MAX5035CUPA does not require external compensation components. It features fully internal frequency compensation optimized for stability with standard output filter configurations. The datasheet explicitly advises against adding external compensation networks, as the preset compensation ensures optimum closed-loop bandwidth and phase margin when the output is sensed immediately after the primary LC filter.
What is the purpose of the VD pin on the MAX5035CUPA?
The VD pin on the MAX5035CUPA outputs a regulated ~7.8V supply used exclusively to charge the BST capacitor. This internal regulator eliminates the need for an external bias source to drive the high-side DMOS gate. A 0.1µF ceramic capacitor must be placed between VD and GND to stabilize this regulator and ensure reliable bootstrap operation across temperature and load.
Can the MAX5035CUPA be used with an input voltage below 15V?
No, the MAX5035CUPA is not specified for operation below 15V input. Its electrical characteristics table defines a minimum input voltage of 15V for the MAX5035C variant. Attempting to operate below 15V may result in failure to regulate 12V output, unstable switching, or activation of undervoltage lockout. For lower-input applications, consider the MAX5035A (7.5V min) or MAX5035B (7.5V min) variants instead.
How does the MAX5035CUPA handle output short-circuit conditions?
The MAX5035CUPA responds to output short-circuit with hiccup-mode protection: it cycles between brief conduction attempts and shutdown intervals. After detecting overcurrent, it disables switching, waits ~30ms, then retries. This limits average power dissipation and prevents thermal runaway. The device sustains indefinite short-circuit duration at VIN ≤ 40V per datasheet specifications, making it suitable for automotive applications where wiring faults may occur.
MAX5035CUPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 125kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX5035CUPA FAQ
1.How can I place an order for MAX5035CUPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5035CUPA 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 MAX5035CUPA reliable?
The price and inventory of MAX5035CUPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5035CUPA is usually 5 days.
3.What payment methods are accepted for MAX5035CUPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5035CUPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5035CUPA?
MAX5035CUPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5035CUPA 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 MAX5035CUPA?
For technical support, including MAX5035CUPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5035CUPA requirements.
6.How does Aetrix verify that MAX5035CUPA is sourced from the original manufacturer or authorized distributors?
All MAX5035CUPA 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 MAX5035CUPA meets industry standards.
7.What is the process for return or replacement of MAX5035CUPA?
All MAX5035CUPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX5035CUPA, 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 MAX5035CUPA part is unused and in its original packaging.
Return procedure for MAX5035CUPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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