My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX5035CUPA+
- Part No.:
- MAX5035CUPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX5035CUPA+.pdf
- Description:
- IC REG BUCK 12V 1A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,262
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX5035CUPA+ from Maxim Integrated is a high-voltage, 12V fixed-output, step-down DC-DC converter with internal 0.4Ω high-side DMOS FET, operating from 15V to 76V input and delivering up to 1A output current. It features 125kHz fixed-frequency PWM operation, pulse-skipping mode for light-load efficiency, and automotive-grade -40°C to +125°C operation in 8-pin PDIP package. Used in industrial power supplies requiring high-input-voltage regulation with low quiescent current.
For engineers reviewing the MAX5035CUPA+ datasheet, MAX5035CUPA+ pinout, MAX5035CUPA+ application, or MAX5035CUPA+ equivalent, key selection criteria include input voltage range (15–76V), fixed 12V output tolerance (±3%), thermal shutdown at +160°C, 270µA no-load quiescent current, and compatibility with external Schottky rectifiers such as 50SQ100.
Technical Context
The MAX5035CUPA+ implements voltage-mode control with feed-forward compensation and integrates a high-voltage DMOS switch rated for 76V input. Its internal 7.8V regulator (VD) powers gate drive and analog circuitry, while BST pin enables bootstrap gate drive for the high-side switch using a 0.1µF ceramic capacitor.
It employs cycle-by-cycle current limiting (1.9A typical peak limit), hiccup-mode short-circuit protection, and thermal shutdown with 20°C hysteresis. The device transitions automatically between PWM and pulse-skipping modes based on load, maintaining ≥94% efficiency at 24VIN/0.5AOUT and 270µA quiescent current at no load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 15V to 76V - supports wide industrial and automotive battery-fed inputs without pre-regulation |
| Output Voltage | 12.0V ±3% - factory-trimmed fixed output; no external feedback resistors required |
| Max Output Current | 1A - limited by thermal dissipation in PDIP package (727mW @ +70°C) |
| Switching Frequency | 125kHz (109–137kHz range) - enables compact magnetics and predictable EMI filtering |
| Quiescent Current | 270µA at no load - enables long standby life in always-on systems |
| Shutdown Current | 10µA typical - ensures minimal battery drain during system sleep |
| Thermal Shutdown | +160°C junction temperature with +140°C restart hysteresis - protects against sustained overload |
Pinout & Package
MAX5035CUPA+ is housed in an 8-pin plastic DIP (PDIP) package with through-hole mounting and JEDEC-standard thermal characteristics (θJA = 110°C/W). Pin functions are validated per Maxim's official pin description and block diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor connection | Connects 0.1µF ceramic cap to LX; provides gate drive voltage for internal high-side DMOS switch |
| VD | Internal regulator output | 7.8V regulated supply for internal logic and gate driver; bypass to GND with 0.1µF ceramic |
| SGND | Signal ground reference | Internal analog ground node; must be tied directly to system GND plane |
| FB | Feedback input | Internally connected to 12V output; no external divider needed for MAX5035C variant |
| ON/OFF | Enable/shutdown control | Logic-level input; <1.5V disables regulator, >1.69V enables; 100mV hysteresis prevents chatter |
| GND | Power ground return | Main power return path for LX switch and output capacitor; tie to SGND at single-point star ground |
| VIN | Main input supply | Accepts 15–76V; requires low-ESR bulk capacitor (e.g., 68µF) placed adjacent to pin |
| LX | Switch node | Drives external Schottky diode (e.g., 50SQ100); connects to inductor and BST capacitor |
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 |
| Internal frequency compensation | Enables stable operation with standard LC filter components-no external compensation network required |
| Pulse-skipping light-load mode | Maintains >85% efficiency down to 1mA load, critical for battery-backed or energy-harvesting systems |
| Automotive temperature range | -40°C to +125°C operation qualified per AEC-Q100 stress test conditions |
| Hiccup-mode short-circuit protection | Prevents thermal runaway during output fault by cycling ON/OFF until fault clears |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Regulating 24V truck battery to stable 12V for microcontroller, CAN transceiver, and sensor interfaces. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing clean, protected 12V rail. Use Value: Withstands load dump transients up to 76V and operates reliably across full vehicle temperature range (-40°C to +125°C). | Use Scenario: Powering infotainment head unit subsystems from 12V battery with variable engine-off/ignition-on conditions. IC Role / Device Role / Timing Role: Main 12V point-of-load converter enabling low-quiescent operation during key-off sleep mode. Use Value: 270µA no-load IQ and 10µA shutdown current extend battery life during extended parking periods. |
| Railway Signaling Equipment | Telecom Remote Radio Unit |
Use Scenario: Converting 72V nominal railway traction supply to 12V for FPGA configuration and monitoring circuitry. IC Role / Device Role / Timing Role: High-input-voltage DC-DC stage tolerant of wide line fluctuations and surges. Use Value: 76V absolute max input rating and undervoltage lockout at 5.2V prevent erratic startup during brownout events. | Use Scenario: Providing 12V bias to RF power amplifiers in outdoor base station cabinets with ambient temperatures up to +70°C. IC Role / Device Role / Timing Role: Efficient, thermally robust local regulator mounted directly on RF board. Use Value: 94% efficiency at 24VIN/0.5AOUT minimizes heat generation in enclosed enclosures. |
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 | 42V max input, adjustable output, requires external MOSFET and compensation; 100kHz fixed frequency | Suitable for lower-input-voltage industrial systems where 76V capability is unnecessary | Select when input stays below 42V and design flexibility (adjustable VOUT, external FET) outweighs integration benefits |
| TPS54160DGQ | 60V max input, adjustable output, integrated FET, 1.3A current limit; 100µA IQ in Eco-mode | Better suited for ultra-low-power battery systems needing sub-100µA quiescent current | Choose when input ≤60V and standby current is more critical than 76V surge tolerance |
Compared with LM5017MM/NOPB and TPS54160DGQ, the MAX5035CUPA+ uniquely delivers 76V input support, fixed 12V output, and automotive-grade thermal performance in a fully integrated PDIP package-making it optimal for high-reliability, high-input-voltage applications where simplicity and ruggedness are prioritized over adjustability or lowest IQ.
Availability
MAX5035CUPA+ is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, railway signaling equipment, and telecom remote radio units requiring stable component supply under harsh environmental conditions.
Supply support for MAX5035CUPA+ 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-efficiency, high-input-voltage step-down converters targeting applications where wide VIN range, integrated power stages, and automotive qualification are essential-such as battery-powered infrastructure and transportation systems.
FAQ
What is the maximum input voltage supported by the MAX5035CUPA+?
The MAX5035CUPA+ supports a maximum input voltage of 76V, with absolute maximum rating up to +80V. Its operational input range is specified as 15V to 76V for the MAX5035C variant. This makes the MAX5035CUPA+ suitable for applications involving 24V, 48V, and 72V industrial or automotive bus systems where transient overvoltage tolerance is critical.
Does the MAX5035CUPA+ require external feedback resistors to set the output voltage?
No, the MAX5035CUPA+ does not require external feedback resistors. As a MAX5035C variant, it features a factory-trimmed fixed 12V output. The FB pin is internally connected to the regulated output, eliminating the need for an external resistor divider-reducing component count and improving accuracy versus adjustable alternatives.
What package type and mounting style does the MAX5035CUPA+ use?
The MAX5035CUPA+ uses an 8-pin plastic DIP (PDIP) package with through-hole mounting. It is RoHS-compliant and lead(Pb)-free, indicated by the "+" suffix. The PDIP package offers robust thermal performance (θJA = 110°C/W) and is compatible with standard wave-soldering processes used in industrial PCB assembly.
How does the MAX5035CUPA+ manage efficiency at light loads?
The MAX5035CUPA+ automatically switches from fixed-frequency PWM mode to pulse-skipping mode under light loads, reducing switching losses and maintaining high efficiency. At no load, it draws only 270µA quiescent current, and in shutdown mode (ON/OFF = low), current drops to 10µA typical-enabling energy-efficient operation in always-on or battery-backed systems.
What external components are mandatory for basic operation of the MAX5035CUPA+?
Four external components are mandatory: (1) a 0.1µF ceramic capacitor between BST and LX, (2) a 0.1µF ceramic capacitor from VD to GND, (3) a Schottky rectifier (e.g., 50SQ100) from LX to output ground, and (4) an inductor (e.g., 220µH for 12V output). Input and output bulk capacitors (e.g., 68µF each) are also required for stability and ripple suppression.
MAX5035CUPA+ 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):
- 12V
- 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
MAX5035CUPA+ FAQ
1.How can I place an order for MAX5035CUPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5035CUPA+ 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 MAX5035CUPA+ reliable?
The price and inventory of MAX5035CUPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5035CUPA+ is usually 5 days.
3.What payment methods are accepted for MAX5035CUPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5035CUPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5035CUPA+?
MAX5035CUPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5035CUPA+ 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 MAX5035CUPA+?
For technical support, including MAX5035CUPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5035CUPA+ requirements.
6.How does Aetrix verify that MAX5035CUPA+ is sourced from the original manufacturer or authorized distributors?
All MAX5035CUPA+ 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 MAX5035CUPA+ meets industry standards.
7.What is the process for return or replacement of MAX5035CUPA+?
All MAX5035CUPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5035CUPA+, 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 MAX5035CUPA+ part is unused and in its original packaging.
Return procedure for MAX5035CUPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX5035CUPA+ 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…
