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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:1,107
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Product details
Overview
The MAX5035BUPA+ from Maxim Integrated is a high-voltage, 5V fixed-output, step-down DC-DC converter IC featuring internal 0.4Ω high-side DMOS FET, 7.5V–76V input range, 1A output current capability, 125kHz fixed-frequency PWM operation with pulse-skipping at light loads, and automotive-grade temperature support (0°C to +85°C) in 8-pin PDIP package. It delivers up to 90% efficiency at 12VIN/5VOUT/0.5A and targets industrial power rails requiring robust input voltage tolerance.
For engineers reviewing the MAX5035BUPA+ datasheet, MAX5035BUPA+ pinout, MAX5035BUPA+ application, or MAX5035BUPA+ equivalent, key selection criteria include its 5V fixed output, 270µA no-load quiescent current, integrated thermal shutdown and hiccup-mode short-circuit protection, undervoltage lockout (5.2V typ), and compatibility with standard Schottky freewheeling diodes like 50SQ100.
Technical Context
This voltage-mode buck converter uses internal voltage feed-forward control and an integrated high-side DMOS switch to maintain stable regulation across wide input transients. Its fixed 125kHz oscillator operates in continuous conduction mode under heavy load and transitions automatically to pulse-skipping mode below ~85mA to sustain high light-load efficiency.
The device integrates internal frequency compensation, a 7.8V internal regulator (VD) for gate drive, and dedicated BST pin for bootstrap capacitor coupling to LX. Protection features include cycle-by-cycle current limiting (1.9A typ), thermal shutdown at +160°C with 20°C hysteresis, and undervoltage lockout with internal 5.2V threshold or externally programmable via ON/OFF pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports direct connection to 24V/48V industrial buses and 12V automotive systems with headroom for transients. |
| Output Voltage | 5.0V ±2.5% (4.85V–5.15V) - tightly regulated fixed output suitable for powering microcontrollers, sensors, and logic interfaces. |
| Max Output Current | 1A - limited by package thermal resistance (110°C/W for PDIP); requires external Schottky diode and 100µH inductor per typical circuit. |
| Quiescent Current | 270µA (typ) at no load - enables low-power standby operation in always-on systems without battery drain. |
| Switching Frequency | 125kHz (109–137kHz over temp) - balances EMI, inductor size, and efficiency; fixed frequency simplifies EMI filtering design. |
| Internal FET RDS(ON) | 0.4Ω (typ) - reduces conduction losses and eliminates need for external high-voltage MOSFET in compact designs. |
| Shutdown Current | 10µA (typ) - enables deep sleep states; controlled via ON/OFF pin with 1.69V rising threshold and 100mV hysteresis. |
Pinout & Package
MAX5035BUPA+ is housed in an 8-pin plastic DIP (PDIP) package with through-hole mounting and JEDEC-standard footprint. Thermal resistance θJA = 110°C/W enables 727mW continuous dissipation at +70°C ambient before derating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor node | Connects 0.1µF ceramic capacitor to LX to generate gate drive voltage for internal high-side DMOS switch. |
| VD | Internal regulator output | Provides ~7.8V bias for gate driver; 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 plane to avoid noise coupling. |
| FB | Feedback sense input | Connected directly to VOUT for 5V fixed-output operation; internal reference is 1.22V. |
| ON/OFF | Enable/shutdown control | Pull low (<1.5V) to enter 10µA shutdown; driven high (>1.85V) for normal operation; includes 100mV hysteresis. |
| GND | Power ground return | Main power return path for VIN, LX, and internal circuits; connect to star ground point near input/output capacitors. |
| VIN | Main input supply | Accepts 7.5V–76V DC; requires local low-ESR bypass capacitor (e.g., 68µF aluminum + 0.1µF ceramic). |
| LX | Switch node | Drives external Schottky diode (e.g., 50SQ100); connects to inductor and BST capacitor; voltage swings from GND to VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-voltage DMOS switch | 0.4Ω RDS(ON) enables single-chip 76V-to-5V conversion without external MOSFET or driver. |
| Automatic pulse-skipping mode | Reduces quiescent current to 270µA at no load while maintaining >85% efficiency down to 10mA output. |
| Internal frequency compensation | Eliminates need for external compensation network-only FB, BST, and VD bypass caps required for stable operation. |
| Hiccup-mode short-circuit protection | Shuts down on overload, cools, then retries-prevents thermal runaway during sustained output shorts. |
| Wide-input undervoltage lockout | Internal 5.2V UVLO prevents erratic startup below minimum operating voltage; configurable via ON/OFF divider for custom thresholds. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Providing isolated 5V rail from 24V factory bus to power PLC I/O modules and field sensors. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering regulated 5V at up to 1A with transient immunity to 76V surges. Use Value: Eliminates need for pre-regulator stages; 7.5V–76V input range accommodates brownouts and load-dump events without external protection. | Use Scenario: Generating 5V for microcontroller, CAN transceiver, and LED drivers in door module or seat controller. IC Role / Device Role / Timing Role: High-reliability DC-DC converter operating across -40°C to +85°C ambient with built-in thermal shutdown. Use Value: 10µA shutdown current extends battery life during vehicle sleep mode; hiccup protection survives accidental output shorts during assembly. |
| Distributed Telecom Power | Smart Meter Auxiliary Rail |
Use Scenario: Deriving 5V auxiliary supply from 48V telecom backplane for monitoring ICs and real-time clocks. IC Role / Device Role / Timing Role: Fixed-output buck converter with 125kHz switching optimized for low-noise filtering in dense PCB layouts. Use Value: Internal compensation and fixed frequency simplify compliance with EN55022 Class B conducted EMI limits. | Use Scenario: Powering metrology ASIC and RF transceiver from 12V battery or 24V AC/DC adapter in utility meter. IC Role / Device Role / Timing Role: Efficient, low-quiescent converter enabling >10-year battery life in AMI endpoints. Use Value: 270µA no-load IQ minimizes self-discharge; 5V output matches standard logic and sensor interface 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 |
|---|---|---|---|
| LM5017MM/NOPB | 4.5V–75V input, adjustable output, 600mA max, requires external compensation. | Lower current rating; needs external feedback resistors and compensation network. | Choose when adjustable output or lower cost is prioritized over 1A capability and integrated compensation. |
| TPS54360BDDAR | 3.5V–60V input, adjustable output, 3.5A max, 2.5µA shutdown current, requires external FET driver. | Higher current, wider temp range (-40°C to +150°C), but lacks integrated high-side FET and fixed 5V option. | Choose when >1A output or extended junction temperature operation is required, accepting added external component count. |
Compared with LM5017MM/NOPB and TPS54360BDDAR, the MAX5035BUPA+ offers plug-and-play 5V regulation with no external compensation or feedback resistors, making it optimal for space-constrained 1A applications where simplicity and fast time-to-market outweigh programmability or ultra-low shutdown current.
Availability
MAX5035BUPA+ is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and distributed telecom power systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant through-hole packaging.
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) is a semiconductor company specializing in high-performance 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 designed specifically for rugged, wide-input industrial and automotive power supplies where reliability, integration, and ease of use are critical.
FAQ
What is the maximum input voltage the MAX5035BUPA+ can withstand?
The MAX5035BUPA+ supports an absolute maximum input voltage of +80V, with recommended continuous operation from 7.5V to 76V. This allows reliable use in 48V industrial systems and 24V automotive environments with load-dump transients. The internal undervoltage lockout activates at 5.2V (typ), preventing operation below safe start-up thresholds.
Does the MAX5035BUPA+ require external compensation components?
No, the MAX5035BUPA+ includes internal frequency compensation optimized for stability with standard external components (BST cap, VD cap, input/output capacitors, and inductor). No external RC networks or compensation pins are needed-simplifying layout and reducing BOM count compared to controllers requiring external loop compensation.
What type of external diode is required for the MAX5035BUPA+?
The MAX5035BUPA+ requires an external Schottky rectifier such as the 50SQ100 (76V, 5A) or equivalent. The diode must have VF < 0.45V at max load and reverse voltage rating ≥76V. Low forward voltage minimizes conduction loss and prevents unintended turn-on of the internal body diode between LX and GND.
How does the MAX5035BUPA+ handle thermal overload conditions?
The MAX5035BUPA+ incorporates thermal shutdown that disables the internal high-side switch when junction temperature exceeds +160°C. After cooling to +140°C (20°C hysteresis), it automatically resumes operation in hiccup mode-cycling on/off until fault clearance. This protects against permanent damage during sustained overload or poor heatsinking in the 8-pin PDIP package.
Can the MAX5035BUPA+ be used in automotive applications?
Yes-the MAX5035BUPA+ operates from 0°C to +85°C and meets automotive electrical requirements including load dump immunity (76V max input) and hiccup-mode short-circuit protection. While not AEC-Q200 qualified, its robust design and thermal protection make it suitable for non-safety-critical automotive body electronics such as lighting controls and infotainment power rails.
MAX5035BUPA+ 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):
- 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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