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Analog Devices Inc./Maxim Integrated MAX5035BUPA
- Part No.:
- MAX5035BUPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX5035BUPA.pdf
- Description:
- IC REG BUCK 5V 1A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,157
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Product details
Overview
The MAX5035BUPA from Maxim Integrated is a high-voltage, 1A step-down DC-DC converter in an 8-pin plastic DIP package, operating from 7.5V to 76V input and delivering a fixed 5.0V output with ±2.5% regulation over temperature and load. It integrates a 0.4Ω high-side DMOS FET, internal frequency compensation, and operates at 125kHz PWM or pulse-skipping mode for light-load efficiency. It is used in automotive power supplies where wide-input, low-quiescent-current regulation is required.
For engineers reviewing the MAX5035BUPA datasheet, MAX5035BUPA pinout, MAX5035BUPA application, or MAX5035BUPA equivalent, key selection criteria include input voltage range (7.5–76V), fixed 5V output tolerance, thermal shutdown at +160°C, 10µA shutdown current, and compatibility with standard Schottky rectifiers like 50SQ100.
Technical Context
The MAX5035BUPA employs voltage-mode control with feed-forward compensation and an internal high-side N-channel DMOS switch. Its 125kHz fixed-frequency PWM operation transitions automatically to pulse-skipping mode below ~85mA load to maintain high efficiency and low quiescent current (270µA no-load).
It features integrated undervoltage lockout (5.2V typ), cycle-by-cycle current limiting (1.3–2.5A), hiccup-mode short-circuit protection, and thermal shutdown with 20°C hysteresis. The device uses internal VD-regulated bootstrap drive for the high-side gate and requires external 0.1µF BST-to-LX and VD-to-GND ceramic capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports wide industrial and automotive battery inputs including 24V, 48V, and 72V systems. |
| Output Voltage | 5.0V ±2.5% - tightly regulated fixed output suitable for powering microcontrollers, sensors, and logic without external feedback resistors. |
| Max Output Current | 1A - limited by package thermal dissipation (727mW @ TA=+70°C, θJA=110°C/W in PDIP). |
| Quiescent Current | 270µA at no load - enables long battery life in always-on automotive modules. |
| Switching Frequency | 125kHz (109–137kHz over temp) - balances EMI, inductor size, and efficiency; enables use of compact 100µH inductors. |
| Shutdown Current | 10µA typical - ensures minimal parasitic drain during system sleep or ignition-off states. |
| Thermal Shutdown | +160°C junction with +140°C restart hysteresis - protects against sustained overload or poor heatsinking in enclosed environments. |
Pinout & Package
MAX5035BUPA is housed in an 8-pin plastic DIP (dual in-line package) with through-hole mounting and JEDEC-standard footprint. Thermal resistance is θJA = 110°C/W (JEDEC 51).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor connection | Connects 0.1µF ceramic capacitor between BST and LX to generate gate drive voltage for internal high-side DMOS FET. |
| VD | Internal regulator output | Provides ~7.8V regulated supply for internal circuitry; bypass 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 input | Connected directly to 5V output for fixed-output operation; internal 1.22V reference sets regulation point. |
| ON/OFF | Enable/shutdown control | Logic-level input; rising threshold 1.69V (typ), hysteresis 100mV; pull low to enter 10µA shutdown mode. |
| GND | Power ground | Main return path for high-current switching loop; connect to SGND and PCB star ground point. |
| VIN | Main input supply | Accepts 7.5–76V; requires local low-ESR input capacitor (e.g., 68µF aluminum + 0.1µF ceramic) near pin. |
| LX | Switch node | Drain of internal high-side DMOS; connects to inductor and external Schottky rectifier cathode (e.g., 50SQ100). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.4Ω high-side DMOS FET | Eliminates need for external MOSFET and driver, reducing BOM count and layout complexity in space-constrained designs. |
| Internal frequency compensation | Enables stable operation with minimal external components-no compensation network required for standard LC filter designs. |
| Pulse-skipping light-load mode | Maintains >85% efficiency down to ~10mA load, critical for automotive body electronics with intermittent duty cycles. |
| Hiccup-mode short-circuit protection | Prevents thermal runaway during sustained output shorts by cycling on/off until fault clears-no external current-sense resistor needed. |
| Automotive-grade temperature range | Specified for 0°C to +85°C ambient (MAX5035BUPA), matching commercial automotive subsystem requirements (e.g., infotainment, ADAS sensors). |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and sensor interface circuits in door module or seat controller. IC Role / Device Role / Timing Role: Primary 5V buck regulator converting 12V/24V battery to clean, regulated 5V rail. Use Value: 270µA quiescent current extends battery life during vehicle sleep mode; 76V input withstands load-dump transients per ISO 7637-2. | Use Scenario: Supplies isolated 5V logic power to digital input/output cards in programmable logic controllers. IC Role / Device Role / Timing Role: Front-end DC-DC stage stepping down 24–48V field bus voltage to 5V for FPGA and level-shifting ICs. Use Value: Fixed 5V output eliminates calibration overhead; 125kHz switching allows predictable EMI filtering with small passive components. |
| Distributed Telecom Power | Off-Grid Solar Charge Controller |
Use Scenario: Provides 5V bias for monitoring ICs and communication interfaces in remote base station power management units. IC Role / Device Role / Timing Role: Secondary regulator deriving 5V from intermediate 48V telecom bus. Use Value: 7.5–76V input range accommodates both nominal 48V and brownout conditions; hiccup protection handles occasional surge-induced shorts. | Use Scenario: Generates stable 5V for MCU and display in solar-powered irrigation controllers exposed to wide battery voltage swings (12–60V). IC Role / Device Role / Timing Role: Main system regulator converting variable lead-acid or LiFePO₄ battery voltage to fixed 5V. Use Value: Internal UVLO (5.2V) prevents startup at critically low battery; thermal shutdown protects during hot ambient + full-load operation. |
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, no integrated bootstrap diode - requires external bootstrap capacitor and diode. | Higher minimum input (8V vs. 7.5V); lacks hiccup-mode short-circuit protection; lower max input voltage limits use in 72V systems. | Choose when cost sensitivity outweighs robustness needs and board space permits extra discrete components. |
| TPS54260DGQR | Adjustable output (1.22V–60V), 2.5A capability, 100kHz–2.5MHz programmable frequency, integrated soft-start - no fixed 5V variant. | Requires external feedback resistors; higher peak current rating increases inductor cost; wider frequency range complicates EMI filtering. | Choose when adjustable output or higher current headroom is required; not drop-in for fixed 5V applications. |
Compared with LM5008AMM/NOPB and TPS54260DGQR, the MAX5035BUPA offers tighter 5V regulation (±2.5%), integrated hiccup protection, and guaranteed 76V input operation - making it optimal for automotive and industrial applications demanding reliability over configurability.
Availability
MAX5035BUPA is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, and distributed telecom systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX5035BUPA 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 industrial, automotive, and communications markets.
The MAX5035BUPA belongs to the MAXPower™ family of high-voltage DC-DC converters engineered for rugged, wide-input applications such as automotive subsystems and industrial power distribution where reliability under voltage transients is critical.
FAQ
What is the maximum input voltage rating for the MAX5035BUPA?
The MAX5035BUPA has an absolute maximum input voltage rating of +80V, with continuous operation specified from 7.5V to 76V. This allows safe operation in automotive environments subject to load-dump transients up to 76V per ISO 7637-2, while maintaining functional integrity at the 80V stress limit. Always observe derating guidelines for long-term reliability.
Does the MAX5035BUPA require external compensation components?
No, the MAX5035BUPA includes internal frequency compensation optimized for stability with standard LC output filters. No external compensation network is required-only the recommended 0.1µF BST and VD bypass capacitors, plus input/output bulk capacitance, are needed for proper operation per the Typical Operating Circuit.
What is the output voltage tolerance of the MAX5035BUPA over temperature and load?
The MAX5035BUPA delivers a fixed 5.0V output with ±2.5% tolerance across the full operating temperature range (0°C to +85°C) and load current (20mA to 1A). Measured data shows output variation from 4.85V to 5.15V under worst-case conditions, meeting tight regulation requirements for MCU and sensor power rails.
Can the MAX5035BUPA be used in automotive applications requiring AEC-Q200 compliance?
The MAX5035BUPA is rated for 0°C to +85°C operation and shares design heritage with AEC-Q200-qualified variants (e.g., MAX5035BASA/V), but the MAX5035BUPA itself is not AEC-Q200 certified. For production automotive applications requiring qualification, select the /V suffix automotive-grade version instead.
What external components are mandatory for basic operation of the MAX5035BUPA?
Mandatory external components for the MAX5035BUPA include: a 0.1µF ceramic capacitor between BST and LX; a 0.1µF ceramic capacitor from VD to GND; a Schottky rectifier (e.g., 50SQ100); a 100µH power inductor; and input/output bulk capacitors (e.g., 68µF aluminum + 0.1µF ceramic at VIN and VOUT). No feedback resistors are needed for fixed 5V operation.
MAX5035BUPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX5035BUPA FAQ
1.How can I place an order for MAX5035BUPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5035BUPA 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 MAX5035BUPA reliable?
The price and inventory of MAX5035BUPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5035BUPA is usually 5 days.
3.What payment methods are accepted for MAX5035BUPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5035BUPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5035BUPA?
MAX5035BUPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5035BUPA 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 MAX5035BUPA?
For technical support, including MAX5035BUPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5035BUPA requirements.
6.How does Aetrix verify that MAX5035BUPA is sourced from the original manufacturer or authorized distributors?
All MAX5035BUPA 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 MAX5035BUPA meets industry standards.
7.What is the process for return or replacement of MAX5035BUPA?
All MAX5035BUPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX5035BUPA, 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 MAX5035BUPA part is unused and in its original packaging.
Return procedure for MAX5035BUPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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