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Analog Devices Inc./Maxim Integrated MAX5033DUPA+
- Part No.:
- MAX5033DUPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX5033DUPA+.pdf
- Description:
- IC REG BUCK ADJ 500MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,306
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Product details
Overview
MAX5033DUPA+ from Maxim Integrated is a high-voltage, adjustable-output step-down DC-DC converter delivering up to 500mA output current with 7.5V–76V input range, 125kHz fixed switching frequency, and internal 0.4Ω high-side DMOS FET. It operates across 0°C to +85°C in an 8-pin plastic DIP package and targets industrial power rails requiring wide-input, low-quiescent-current regulation.
For engineers reviewing the MAX5033DUPA+ datasheet, MAX5033DUPA+ pinout, MAX5033DUPA+ application, or MAX5033DUPA+ equivalent, key selection criteria include adjustable output (1.25V–13.2V), 270μA no-load quiescent current, hiccup-mode short-circuit protection, thermal shutdown at +160°C, and compatibility with external Schottky rectifiers such as 50SQ100.
Technical Context
The MAX5033DUPA+ uses voltage-mode PWM control with voltage feed-forward for stable regulation across wide VIN ranges. Its internal compensation network eliminates external loop components, while pulse-skipping mode enables high light-load efficiency without external circuitry.
It integrates undervoltage lockout (5.2V typ), cycle-by-cycle current limiting (1.5A typ peak), and thermal shutdown with 20°C hysteresis. The BST pin drives the high-side switch via a 0.1μF bootstrap capacitor, and FB pin regulates output using a 1.221V feedback reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports wide industrial and automotive battery-fed inputs without pre-regulation |
| Output Voltage Range | 1.25V to 13.2V (adjustable) - set via external resistor divider on FB pin with 1.221V reference |
| Max Output Current | 500mA - limited by thermal dissipation in 8-pin PDIP package (727mW @ TA = +70°C) |
| Switching Frequency | 109–137kHz (typ 125kHz) - fixed-frequency PWM operation with predictable EMI profile |
| Quiescent Current | 270μA (typ) at no load - enables long battery life in always-on systems |
| Shutdown Current | 10μA (typ) - reduces system standby power when ON/OFF pin is pulled low |
| Internal High-Side FET RDS(ON) | 0.4Ω (typ) - minimizes conduction loss and eliminates need for external MOSFET |
Pinout & Package
MAX5033DUPA+ is housed in an 8-pin plastic DIP (dual in-line package) with through-hole mounting and lead(Pb)-free finish (+ suffix). Thermal resistance θJA is 110°C/W (JEDEC 51).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BST | Bootstrap capacitor connection | Drives high-side DMOS gate; requires 0.1μF ceramic cap between BST and LX |
| 2 - VD | Internal regulator output | Provides ~7.8V bias for internal circuitry; bypass to GND with 0.1μF ceramic cap |
| 3 - SGND | Signal ground reference | Must be connected directly to system ground; separates analog and power return paths |
| 4 - FB | Feedback input | Senses output voltage; regulates to 1.221V reference; used with external resistor divider for adjustable VOUT |
| 5 - ON/OFF | Enable/shutdown control | Logic-high (>1.69V) enables operation; logic-low disables converter and reduces IQ to 10μA |
| 6 - GND | Power ground | Main return path for high-current switch node; connect to star ground point near rectifier and capacitors |
| 7 - VIN | Main input supply | Accepts 7.5V–76V; requires local low-ESR bypass capacitor (e.g., 47μF aluminum + 0.1μF ceramic) |
| 8 - LX | Switch node | Connects to inductor and cathode of external Schottky rectifier (e.g., 50SQ100); carries pulsed high-current waveform |
Key Features
| Feature | Design Value |
|---|---|
| Internal frequency compensation | Eliminates need for external compensation network - simplifies layout and improves stability across operating conditions |
| Pulse-skipping light-load mode | Maintains >80% efficiency at 10mA load - extends battery runtime without requiring external control logic |
| Hiccup-mode short-circuit protection | Auto-retries after fault clearance - prevents thermal runaway during sustained output shorts |
| Thermal shutdown with hysteresis | Shuts down at +160°C junction temp; resumes at +140°C - avoids oscillation during overload recovery |
| Undervoltage lockout (UVLO) | Enables operation only above 5.2V (internal) or user-programmable threshold - prevents erratic startup at low VIN |
Applications
| Industrial Sensor Node Power | Railway Control Module Supply |
|---|---|
Use Scenario: Powering isolated analog front-ends and microcontrollers in remote field sensors powered from 24V/48V DC distribution rails. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing clean, regulated 3.3V or 5V from fluctuating rail voltage. Use Value: 76V max input withstands load-dump transients; 270μA quiescent current extends battery life in wireless nodes. |
Use Scenario: Generating stable 5V or 12V supplies for PLC I/O modules and communication interfaces in rolling stock electronics. IC Role / Device Role / Timing Role: High-reliability DC-DC stage converting nominal 72V or 110V battery bus to logic-level voltages. Use Value: Automotive-grade temperature range (0°C to +85°C) and hiccup-mode protection ensure robustness against vibration-induced faults. |
| Programmable Logic Controller (PLC) Auxiliary Rail | Test Equipment Front-End Power |
Use Scenario: Providing configurable auxiliary voltage rails (e.g., 3.3V, 5V, ±12V) for FPGA configuration, ADC reference, or interface ICs in modular PLC backplanes. IC Role / Device Role / Timing Role: Adjustable-output buck converter enabling flexible board-level power architecture without redesign. Use Value: 1.25V–13.2V output range supports diverse IC requirements; internal 0.4Ω FET reduces BOM count and footprint. |
Use Scenario: Supplying precision analog circuitry (op-amps, DACs, references) in portable bench instruments powered from universal AC adapters or lab supplies. IC Role / Device Role / Timing Role: Low-noise, tightly regulated intermediate rail generator preceding LDO post-regulation. Use Value: Fixed 125kHz switching enables predictable EMI filtering; soft-start (400μs) prevents output overshoot into sensitive analog loads. |
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, 600mA output, 1MHz switching, requires external compensation | Higher frequency allows smaller magnetics but increases EMI sensitivity; no integrated UVLO hysteresis | Prefer LM5017MM/NOPB when board space is constrained and higher switching frequency is acceptable |
| TPS54240DGQR | 3.5V–42V input, 2.5A output, 100kHz–2.5MHz programmable frequency, integrated soft-start | Lower max input voltage limits use in 48V+ systems; higher current rating suits heavier loads | Choose TPS54240DGQR where >500mA output or programmable frequency is required, and input stays ≤42V |
Compared with MAX5033DUPA+, LM5017MM/NOPB offers higher switching frequency and current but lacks internal compensation and hiccup-mode protection, while TPS54240DGQR provides greater output current and flexibility at the cost of reduced input voltage range and missing 76V transient tolerance.
Availability
MAX5033DUPA+ is available at Aetrix Electronics and suitable for industrial sensor nodes, railway control modules, PLC auxiliary rails, and test equipment front-end power requiring stable component supply across extended temperature and input voltage ranges.
Supply support for MAX5033DUPA+ 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX5033 series delivers high-efficiency, high-voltage step-down conversion for distributed power architectures where wide input range, low quiescent current, and rugged protection features are critical.
FAQ
What is the maximum input voltage supported by the MAX5033DUPA+?
The MAX5033DUPA+ supports a maximum input voltage of 76V, with absolute maximum rating of +80V on the VIN pin. This enables reliable operation in industrial 48V and railway 72V systems, including transient overvoltage events. Operation above 76V risks exceeding safe operating area limits and triggering thermal shutdown.
How do I configure the output voltage for the MAX5033DUPA+?
The MAX5033DUPA+ features an adjustable output voltage set via an external resistor divider on the FB pin. With a 1.221V internal reference, use R3 and R4 where R4 < 15kΩ and R3 = R4 × (VOUT − 1.221)/1.221. For example, to set 5V output, select R4 = 13.3kΩ and R3 = 41.2kΩ - matching values verified in Maxim's typical application circuit.
Does the MAX5033DUPA+ require external compensation components?
No, the MAX5033DUPA+ includes internal Type-3 compensation optimized for stability with standard output filter configurations. External compensation is not required or recommended - adding external components may degrade phase margin and cause instability. The internal network is validated for use with typical LC filters shown in the datasheet.
What protection features does the MAX5033DUPA+ include?
The MAX5033DUPA+ integrates undervoltage lockout (5.2V typ), cycle-by-cycle current limiting (1.5A typ), hiccup-mode short-circuit protection, thermal shutdown at +160°C with 20°C hysteresis, and BST/LX voltage clamping. These features collectively prevent damage during input transients, output shorts, overtemperature, and startup faults - eliminating need for external protection circuitry.
Which Schottky diode is recommended for use with the MAX5033DUPA+?
Maxim specifies the 50SQ100 (IR) as the preferred Schottky rectifier for the MAX5033DUPA+ across 7.5V–76V input ranges. It provides 100V reverse voltage rating, low forward voltage (<0.45V at full load), and sufficient current handling. Alternative options include MBRM5100 (Diodes Inc.) and 30BQ060 (IR), selected per Table 1 in the MAX5033 datasheet based on VIN and IOUT.
MAX5033DUPA+ 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 7.5V
- Voltage - Input (Max):
- 76V
- Voltage - Output (Min/Fixed):
- 1.221V
- Voltage - Output (Max):
- 13.2V
- 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
MAX5033DUPA+ FAQ
1.How can I place an order for MAX5033DUPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5033DUPA+ 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 MAX5033DUPA+ reliable?
The price and inventory of MAX5033DUPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5033DUPA+ is usually 5 days.
3.What payment methods are accepted for MAX5033DUPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5033DUPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5033DUPA+?
MAX5033DUPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5033DUPA+ 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 MAX5033DUPA+?
For technical support, including MAX5033DUPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5033DUPA+ requirements.
6.How does Aetrix verify that MAX5033DUPA+ is sourced from the original manufacturer or authorized distributors?
All MAX5033DUPA+ 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 MAX5033DUPA+ meets industry standards.
7.What is the process for return or replacement of MAX5033DUPA+?
All MAX5033DUPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5033DUPA+, 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 MAX5033DUPA+ part is unused and in its original packaging.
Return procedure for MAX5033DUPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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