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Analog Devices Inc./Maxim Integrated MAX5033BUPA
- Part No.:
- MAX5033BUPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX5033BUPA.pdf
- Description:
- IC REG BUCK 3.3V 500MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,449
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Product details
Overview
MAX5033BUPA from Maxim Integrated is a high-voltage, fixed-output (5.0V), 500mA step-down DC-DC converter operating from 7.5V to 76V input, featuring internal 0.4Ω high-side DMOS FET, 125kHz fixed-frequency PWM with pulse-skipping at light loads, and integrated thermal shutdown and hiccup-mode short-circuit protection. It delivers regulated 5V power in industrial distributed systems with up to 90% efficiency at 500mA.
For engineers reviewing the MAX5033BUPA datasheet, MAX5033BUPA pinout, MAX5033BUPA application, or MAX5033BUPA equivalent, key selection criteria include its 76V max input rating, 8-pin PDIP package with SGND/SGND separation, 270μA no-load quiescent current, ON/OFF control with 1.69V threshold, and compatibility with standard buck external components (e.g., 220µH inductor, 50SQ100 Schottky diode).
Technical Context
The MAX5033BUPA uses voltage-mode control with feed-forward compensation and internal Type 3 compensation network, eliminating need for external loop compensation components. Its integrated high-side DMOS switch and bootstrap gate drive (BST pin) enable efficient high-voltage buck conversion without external driver circuitry.
It implements dual protection architecture: cycle-by-cycle current limiting (1.5A typical peak limit) combined with hiccup-mode response to output short circuits, and thermal shutdown activation at +160°C with 20°C hysteresis. Undervoltage lockout triggers at 5.2V (typ) on VIN unless overridden via ON/OFF pin divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports wide industrial input rails including 24V, 48V, and PoE++ backplanes |
| Output Voltage | Fixed 5.0V ±2.5% - tightly regulated for USB-peripheral and microcontroller logic supply |
| Max Output Current | 500mA - limited by package thermal resistance (110°C/W for PDIP) and internal switch RDS(ON) |
| Switching Frequency | 125kHz (109–137kHz range) - enables use of low-cost, high-inductance ferrite-core inductors |
| Quiescent Current | 270μA at no load - minimizes standby power in always-on industrial sensors and controllers |
| Shutdown Current | 10μA (typ) - allows deep-sleep operation when ON/OFF pin is pulled low |
| Internal Switch RDS(ON) | 0.4Ω (typ) - reduces conduction loss and simplifies thermal design vs. external MOSFET solutions |
Pinout & Package
MAX5033BUPA is housed in an 8-pin plastic DIP (PDIP) package with through-hole mounting and JEDEC-standard footprint (0.300" width). 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 connection | Drives high-side DMOS gate; requires 0.1µF ceramic cap between BST and LX for proper gate voltage generation |
| VD | Internal regulator output | Provides ~7.8V bias for internal analog/digital blocks; must be bypassed to GND with 0.1µF ceramic capacitor |
| SGND | Signal ground reference | Separate analog ground node-must connect directly to system GND plane to avoid noise coupling into FB path |
| FB | Feedback input | Monitors regulated 5V output directly (no resistor divider needed); 1.22V internal reference sets output accuracy |
| ON/OFF | Enable/disable control | Logic-level input: <1.5V = shutdown (10μA IQ), >1.69V = active; includes 100mV hysteresis for noise immunity |
| GND | Power ground return | Main current return path for LX switch and output capacitor; star-ground connection recommended with SGND and rectifier anode |
| VIN | Main input supply | Accepts 7.5–76V DC; requires local low-ESR bulk capacitor (e.g., 47µF aluminum + 0.1µF ceramic) near pin |
| LX | Switch node | Connects to inductor and Schottky rectifier cathode; high dv/dt node requiring short PCB traces and tight layout |
Key Features
| Feature | Design Value |
|---|---|
| Internal frequency compensation | Eliminates need for external compensation network-reduces BOM count and layout sensitivity |
| Pulse-skipping light-load mode | Maintains >80% efficiency down to 10mA load while holding IQ ≤ 270μA-ideal for intermittent-sensing applications |
| Hiccup-mode short-circuit protection | Shuts down for 10ms then retries-prevents thermal runaway during sustained output faults without latch-up |
| Integrated 0.4Ω high-side DMOS | Enables complete 5V buck solution with only inductor, diode, and capacitors-no external MOSFET or driver required |
| Automotive-grade temperature range | Validated for 0°C to +85°C operation-supports industrial control cabinets and outdoor telecom equipment |
Applications
| Industrial PLC I/O Module | Distributed Power for Field Sensors |
|---|---|
Use Scenario: Powering isolated digital I/O channels and analog sensor interfaces in modular programmable logic controllers. IC Role / Device Role / Timing Role: Primary 5V local regulator converting 24V or 48V backplane supply to clean logic rail for microcontrollers and level-shifters. Use Value: 76V input tolerance accommodates 48V transients; 270μA quiescent current extends battery backup runtime during brownout conditions. | Use Scenario: Providing stable 5V power to wireless sensor nodes deployed across factory floors or remote infrastructure. IC Role / Device Role / Timing Role: High-efficiency buck converter enabling multi-year operation from primary lithium thionyl chloride batteries. Use Value: Pulse-skipping mode maintains >85% efficiency at 100µA load-critical for sleep-state energy budgeting in LoRaWAN and NB-IoT nodes. |
| Ruggedized Network Equipment | Automated Test Equipment (ATE) |
Use Scenario: Generating 5V auxiliary supply in Ethernet switches and media converters exposed to harsh electrical environments. IC Role / Device Role / Timing Role: Input-stage DC-DC regulator handling 76V surges per IEC 61000-4-5 Level 4, feeding downstream point-of-load converters. Use Value: Integrated UVLO and thermal shutdown prevent latch-up during lightning-induced transients; 8-pin PDIP aids mechanical robustness in vibration-prone enclosures. | Use Scenario: Supplying precision 5V rails for ADC references and DAC buffers in benchtop test instruments. IC Role / Device Role / Timing Role: Low-noise, well-regulated 5V source with minimal line/load regulation drift over temperature and input variation. Use Value: ±2.5% output tolerance and <0.1% load regulation ensure measurement repeatability; SGND separation reduces ground bounce in mixed-signal sections. |
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 | 4.5–75V input, adjustable output, 600mA, requires external compensation | Supports variable VOUT but needs additional resistors and compensation components | Choose when adjustable output or higher current is required; accept added design complexity |
| TPS54360DGQ | 3.5–60V input, adjustable output, 3.5A, integrated compensation, wider temp range (–40°C to +125°C) | Higher current capability and extended temperature support, but larger SOIC-8 footprint | Choose for automotive under-hood or high-power industrial use where 500mA is insufficient |
Compared with LM5017MM/NOPB and TPS54360DGQ, MAX5033BUPA offers plug-and-play 5V regulation in legacy PDIP format with lowest component count, making it optimal for cost-sensitive, space-constrained industrial controls where fixed 5V output suffices.
Availability
MAX5033BUPA is available at Aetrix Electronics and suitable for industrial PLCs, distributed field sensors, ruggedized network equipment, and automated test equipment requiring stable component supply with long-term manufacturability and consistent parametric performance.
Supply support for MAX5033BUPA 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, communications, and computing applications.
The MAX5033 product line delivers high-voltage, high-efficiency buck converters optimized for distributed power architectures in harsh environments-emphasizing simplicity, reliability, and wide-input operation without external compensation.
FAQ
What is the maximum input voltage rating for MAX5033BUPA?
The MAX5033BUPA has an absolute maximum input voltage rating of +80V on the VIN pin, with guaranteed operation up to +76V. This allows reliable use in 48V industrial systems with significant transient margins. The device incorporates undervoltage lockout that activates below 5.2V (typ), preventing erratic startup during brownout conditions. Always observe the 80V absolute maximum to avoid permanent damage.
Does MAX5033BUPA require external compensation components?
No, MAX5033BUPA does not require external compensation components. It features fully integrated Type 3 compensation circuitry optimized for standard buck configurations with typical 220µH inductors and ceramic/low-ESR output capacitors. This eliminates the need for external resistors or capacitors in the feedback loop, reducing bill-of-materials count and layout sensitivity while maintaining stable operation across temperature and load.
What is the purpose of the SGND pin on MAX5033BUPA?
The SGND pin on MAX5033BUPA provides a dedicated signal ground reference for the internal error amplifier and feedback comparator, separate from the main power ground (GND). It must be connected directly to the system ground plane at a single point near the device to minimize noise coupling into the feedback path. Improper SGND routing can cause output voltage inaccuracy or instability, especially in noisy industrial environments.
Can MAX5033BUPA be used with an adjustable output voltage?
No, MAX5033BUPA is a fixed 5.0V output variant and cannot be adjusted. Only the MAX5033D series (e.g., MAX5033DUPA) supports adjustable output via external resistor divider on the FB pin. Attempting to modify MAX5033BUPA's output using external feedback will result in incorrect regulation because its internal reference is hardwired to 5.0V. For adjustable applications, select MAX5033DUPA instead.
What thermal protection features does MAX5033BUPA include?
MAX5033BUPA includes thermal shutdown that activates at +160°C junction temperature, turning off the internal power MOSFET until die temperature cools to +140°C (20°C hysteresis). It also features cycle-by-cycle current limiting (1.5A typical peak) and hiccup-mode short-circuit protection-latching off for 10ms then retrying-to prevent destructive overheating during sustained overload or output shorts without requiring external reset circuitry.
MAX5033BUPA 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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 125kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX5033BUPA FAQ
1.How can I place an order for MAX5033BUPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5033BUPA 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 MAX5033BUPA reliable?
The price and inventory of MAX5033BUPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5033BUPA is usually 5 days.
3.What payment methods are accepted for MAX5033BUPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5033BUPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5033BUPA?
MAX5033BUPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5033BUPA 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 MAX5033BUPA?
For technical support, including MAX5033BUPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5033BUPA requirements.
6.How does Aetrix verify that MAX5033BUPA is sourced from the original manufacturer or authorized distributors?
All MAX5033BUPA 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 MAX5033BUPA meets industry standards.
7.What is the process for return or replacement of MAX5033BUPA?
All MAX5033BUPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX5033BUPA, 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 MAX5033BUPA part is unused and in its original packaging.
Return procedure for MAX5033BUPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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