My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX5035AUPA
- Part No.:
- MAX5035AUPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX5035AUPA.pdf
- Description:
- IC REG BUCK 3.3V 1A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,219
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX5035AUPA from Maxim Integrated is a high-voltage, 1A step-down DC-DC converter with fixed 3.3V output, operating from 7.5V to 76V input and consuming only 270µA quiescent current at no load. It integrates a 0.4Ω high-side DMOS FET, internal frequency compensation, and operates at a fixed 125kHz switching frequency with pulse-skipping mode for light-load efficiency. It delivers stable 3.3V power in automotive body control modules requiring wide-input, high-reliability regulation.
For engineers reviewing the MAX5035AUPA datasheet, MAX5035AUPA pinout, MAX5035AUPA application, or MAX5035AUPA equivalent, key selection criteria include its 76V max input rating, 8-pin PDIP package thermal performance (θJA = 110°C/W), undervoltage lockout at 5.2V, hiccup-mode short-circuit protection, and compatibility with standard Schottky freewheeling diodes like 50SQ100.
Technical Context
This voltage-mode buck converter uses feed-forward control and an integrated high-voltage DMOS switch to maintain >90% efficiency across 7.5–76V input range while delivering up to 1A. Its internal 7.8V regulator powers gate drive and analog circuitry, and the BST pin enables bootstrap operation for the high-side N-channel FET.
It features automatic transition between PWM and pulse-skipping modes based on load current, with PFM threshold set at 55–130mA. Protection includes cycle-by-cycle current limiting (1.3–2.5A peak), thermal shutdown at +160°C with 20°C hysteresis, and undervoltage lockout with internal 5.2V threshold or external programmable UVLO 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/24V automotive systems without pre-regulation. |
| Output Voltage | 3.3V ±3.5% (3.185V–3.415V) - tightly regulated for powering 3.3V microcontrollers and logic in harsh environments. |
| Max Output Current | 1A continuous - limited by thermal dissipation in 8-pin PDIP package (727mW @ +70°C, derated 9.1mW/°C above). |
| Quiescent Current | 270µA typical at no load - enables low-power standby operation in always-on automotive modules. |
| Switching Frequency | 125kHz (109–137kHz) - fixed-frequency PWM simplifies EMI filtering; compatible with standard 100µH inductors. |
| Internal High-Side RDS(ON) | 0.4Ω typical - reduces conduction loss and improves full-load efficiency up to 86% at 12VIN/3.3VOUT. |
| Shutdown Current | 10µA typical - ensures minimal battery drain during system sleep states. |
Pinout & Package
MAX5035AUPA is housed in an 8-pin plastic DIP (dual in-line package) with through-hole mounting, optimized for manual assembly and high-temperature industrial applications. Thermal resistance θJA = 110°C/W enables operation up to +85°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor connection | Connects 0.1µF ceramic capacitor to LX to generate gate drive voltage for internal high-side DMOS FET. |
| VD | Internal regulator output | Provides ~7.8V bias supply for gate driver and analog circuits; requires 0.1µF bypass to GND. |
| SGND | Signal ground reference | Must be connected directly to system GND; separates analog return from power ground paths. |
| FB | Feedback input | Connected directly to VOUT for fixed 3.3V version; senses output to regulate voltage at internal 1.22V reference. |
| ON/OFF | Enable/shutdown control | Logic-high (>1.69V) enables operation; logic-low disables switching and reduces supply current to 10µA. |
| GND | Power ground | Main return path for high-current switch node and output capacitor; must connect to SGND at single point. |
| VIN | Main input supply | Accepts 7.5–76V DC; requires low-ESR input capacitor (e.g., 68µF aluminum electrolytic) placed adjacent to pin. |
| LX | Switch node | Drives external Schottky diode (e.g., 50SQ100); connects to inductor and BST capacitor; handles high dv/dt switching. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-voltage DMOS FET | 0.4Ω RDS(ON) enables self-contained buck conversion without external MOSFET, reducing BOM count and layout complexity. |
| Internal frequency compensation | Eliminates need for external compensation network - simplifies design and ensures stable loop response with standard LC filters. |
| Pulse-skipping mode | Reduces quiescent current to 270µA at light loads while maintaining regulation, extending battery life in intermittent-use systems. |
| Hiccup-mode short-circuit protection | Shuts down on overload, cools, then retries - prevents thermal runaway and enables safe recovery without external reset. |
| Wide-input UVLO with external programmability | Default 5.2V internal lockout or user-configurable threshold via resistive divider on ON/OFF pin for custom brown-out behavior. |
Applications
| Automotive Body Control Unit | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering 3.3V CAN transceivers and microcontrollers in door modules exposed to 12V/24V battery fluctuations and load-dump transients. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator converting unregulated vehicle battery to clean logic supply. Use Value: Withstands 76V input surges and maintains regulation during cold-crank (down to 6V), eliminating need for upstream TVS or pre-regulator. |
Use Scenario: Providing isolated 3.3V supply for digital isolators and ADC front-ends in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: High-reliability DC-DC stage delivering noise-immune logic voltage from 24V industrial bus. Use Value: 110°C/W θJA allows operation at +70°C ambient without heatsink; hiccup protection sustains fault conditions without latch-up. |
| Distributed Power Architecture | Telecom Remote Radio Unit |
Use Scenario: Local 3.3V generation in multi-board systems where centralized 48V distribution minimizes copper loss. IC Role / Device Role / Timing Role: Compact, efficient local regulator replacing linear regulators or discrete buck solutions. Use Value: 86% efficiency at 12VIN/3.3VOUT reduces board-level heat; 8-pin PDIP simplifies hand-soldering and rework. |
Use Scenario: Powering FPGA configuration circuitry and clock buffers in outdoor base station radios with wide temperature swing. IC Role / Device Role / Timing Role: Input-tolerant 3.3V supply supporting -40°C to +85°C operation per MAX5035AUPA spec. Use Value: Internal thermal shutdown at +160°C protects against enclosure overheating; 10µA shutdown current preserves backup battery life. |
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, 3.3V fixed, 500mA output, 1MHz switching, SO-8 package | Lower current capability and higher switching frequency require smaller magnetics but increase EMI filtering burden | Select when board space is constrained and 500mA suffices; not suitable for 1A continuous loads. |
| TPS54340DDAR | 3.5–42V input, adjustable output, 3.5A output, 120–150kHz, SO-8 package | Higher current, lower max input voltage, requires external feedback resistors and compensation | Choose for designs needing >1A or adjustable VOUT; requires additional design effort for stability and layout. |
Compared with LM5008AMM/NOPB and TPS54340DDAR, the MAX5035AUPA offers superior 76V input tolerance and integrated 1A capability in a through-hole PDIP package-ideal for ruggedized, serviceable, or high-temperature deployments where SO-8 surface-mount alternatives face thermal or reliability constraints.
Availability
MAX5035AUPA is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and distributed telecom power systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX5035AUPA 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 demanding industrial, automotive, and communications applications.
The MAX5035 product line delivers high-voltage, high-efficiency step-down converters targeting systems with wide-input battery or bus supplies-designed specifically for robustness in automotive and industrial environments where input transients and thermal stress are common.
FAQ
What is the maximum input voltage supported by the MAX5035AUPA?
The MAX5035AUPA supports an absolute maximum input voltage of +80V, with guaranteed operation across 7.5V to 76V. This makes it suitable for 24V and 48V industrial systems and 12V automotive applications subject to load-dump transients. Operation above 76V is outside specification and may compromise reliability or safety margins.
Does the MAX5035AUPA require external compensation components?
No, the MAX5035AUPA includes internal frequency compensation optimized for stability with standard LC output filters. External compensation is not required, simplifying design and reducing bill-of-materials. The internal compensation network is tuned for use with typical 100µH inductors and 68µF output capacitors as shown in the MAX5035AUPA typical application circuit.
How does the MAX5035AUPA handle short-circuit conditions?
The MAX5035AUPA employs hiccup-mode short-circuit protection: upon detecting overcurrent, it shuts down the switch, waits for thermal recovery, then attempts restart. This prevents destructive power dissipation during sustained faults. The device limits peak switch current to 1.3–2.5A and triggers thermal shutdown if junction temperature exceeds +160°C.
Can the MAX5035AUPA be used with a 3.3V fixed output in automotive applications?
Yes, the MAX5035AUPA is rated for 0°C to +85°C operation and features built-in protections critical for automotive use-including undervoltage lockout, thermal shutdown, and hiccup-mode short-circuit response. Its 76V input rating accommodates ISO 7637-2 load-dump pulses, and the 8-pin PDIP package provides mechanical robustness for under-hood environments.
What external components are mandatory for basic MAX5035AUPA operation?
Mandatory external components for the MAX5035AUPA include: a 0.1µF ceramic capacitor between BST and LX; a 0.1µF ceramic capacitor from VD to GND; a low-ESR input capacitor (e.g., 68µF aluminum electrolytic); an output capacitor (e.g., 68µF tantalum); a 100µH power inductor; and a Schottky freewheeling diode (e.g., 50SQ100). No feedback resistors are needed for the fixed 3.3V MAX5035AUPA variant.
MAX5035AUPA 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):
- 3.3V
- 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
MAX5035AUPA FAQ
1.How can I place an order for MAX5035AUPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5035AUPA 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 MAX5035AUPA reliable?
The price and inventory of MAX5035AUPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5035AUPA is usually 5 days.
3.What payment methods are accepted for MAX5035AUPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5035AUPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5035AUPA?
MAX5035AUPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5035AUPA 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 MAX5035AUPA?
For technical support, including MAX5035AUPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5035AUPA requirements.
6.How does Aetrix verify that MAX5035AUPA is sourced from the original manufacturer or authorized distributors?
All MAX5035AUPA 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 MAX5035AUPA meets industry standards.
7.What is the process for return or replacement of MAX5035AUPA?
All MAX5035AUPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX5035AUPA, 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 MAX5035AUPA part is unused and in its original packaging.
Return procedure for MAX5035AUPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX5035AUPA Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
