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Analog Devices Inc./Maxim Integrated MAX5035DASA-T
- Part No.:
- MAX5035DASA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX5035DASA-T.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,928
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Product details
Overview
MAX5035DASA-T from Maxim Integrated is a high-voltage, adjustable-output step-down DC-DC converter with 7.5V–76V input range, 1.25V–13.2V programmable output, and 1A continuous output current. It integrates a 0.4Ω high-side DMOS FET, operates at fixed 125kHz PWM or pulse-skipping mode, and delivers up to 94% efficiency-designed for automotive power conversion in harsh environments.
For engineers reviewing the MAX5035DASA-T datasheet, MAX5035DASA-T pinout, MAX5035DASA-T application, or MAX5035DASA-T equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade (-40°C to +125°C) operation, and real-world design meaning for high-input-voltage buck regulation in distributed power systems.
Technical Context
The MAX5035DASA-T implements voltage-mode control with feed-forward compensation and internal frequency compensation, eliminating external loop components. Its integrated high-side DMOS switch and bootstrap gate drive (BST pin) enable efficient high-voltage step-down without external drivers.
It features automatic transition between PWM and pulse-skipping modes based on load, delivering 270µA quiescent current at no load and 10µA shutdown current. Protection includes undervoltage lockout (5.2V typ), cycle-by-cycle current limit (1.3–2.5A), hiccup-mode short-circuit response, and thermal shutdown at +160°C with +20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports wide industrial and automotive battery inputs including 24V/48V truck systems and 72V EV auxiliary rails. |
| Output Voltage Range | 1.25V to 13.2V (adjustable via FB pin) - enables flexible system-level rail generation without discrete regulators. |
| Max Output Current | 1A continuous - limited by package thermal resistance (SO-8, θJA = 170°C/W) and internal switch RDS(ON) = 0.4Ω. |
| Switching Frequency | 125kHz (fixed) - balances EMI, inductor size, and efficiency; enables use of compact 100µH inductors. |
| Quiescent Current | 270µA at no load - ensures low standby power in always-on automotive modules (e.g., telematics, ADAS sensors). |
| Feedback Reference | 1.221V (typ) at FB pin - sets output with ±1.5% accuracy over temperature; enables precise resistor-divider design. |
| Shutdown Current | 10µA (typ) - allows deep-sleep operation in battery-backed systems without significant drain. |
Pinout & Package
MAX5035DASA-T is housed in an 8-pin SO package (SOIC-8, JEDEC MS-012), rated for -40°C to +125°C ambient operation and RoHS-compliant (+ suffix). Thermal resistance θJA = 170°C/W enables 471mW max power dissipation at +70°C ambient.
| 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 boost. |
| 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 (not power ground plane). |
| FB | Feedback input | Senses output voltage divider; regulates VOUT to 1.221V reference; determines output via R3/R4 ratio. |
| ON/OFF | Enable/shutdown control | Logic-level input (1.69V rising threshold); pulls low to enter 10µA shutdown mode. |
| GND | Power ground | Main return path for switch current and IC ground; must be star-connected with rectifier and capacitors. |
| VIN | Main input supply | Accepts 7.5V–76V; requires local low-ESR input capacitor (e.g., 68µF aluminum + 0.1µF ceramic). |
| LX | Switch node | Connects to inductor and Schottky rectifier cathode; carries high di/dt switching current; layout critical for EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.4Ω high-side DMOS FET | Eliminates need for external MOSFET and driver, reducing BOM count and PCB area in space-constrained automotive modules. |
| Internal frequency compensation | Enables stable operation with minimal external components-no compensation network required for standard LC filter designs. |
| Pulse-skipping light-load mode | Maintains >85% efficiency down to 1mA load, critical for infotainment standby and sensor wake-up circuits. |
| Automotive temperature grade (-40°C to +125°C) | Qualified for under-hood and chassis-mounted applications without derating; meets AEC-Q100 stress test requirements. |
| Hiccup-mode short-circuit protection | Prevents thermal runaway during sustained output faults-cycles on/off until fault clears, preserving reliability in unattended systems. |
Applications
| Automotive Body Control Module (BCM) | Industrial Programmable Logic Controller (PLC) I/O Power |
|---|---|
Use Scenario: Supplies 5V/1A to microcontroller, CAN transceiver, and sensor interface circuitry in vehicle door modules. IC Role / Device Role / Timing Role: Primary buck regulator converting 12V/24V battery to stable 5V rail with low-noise, high-reliability operation. Use Value: 270µA quiescent current prevents battery drain during vehicle sleep mode; 76V input withstands load-dump transients. |
Use Scenario: Powers isolated digital I/O channels in DIN-rail mounted PLCs operating from 24V DC industrial supplies. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator delivering clean 3.3V/1A to FPGA configuration logic and level-shifters. Use Value: Adjustable output allows single BOM to support multiple I/O voltage standards; 125kHz switching simplifies EMI filtering. |
| Railway Signaling Power Supply | Off-Highway Equipment Telematics Unit |
Use Scenario: Generates 12V/1A from 72V nominal traction battery for signaling logic and LED drivers in train control cabinets. IC Role / Device Role / Timing Role: Robust step-down converter handling wide input variation (48V–110V) and meeting EN 50155 shock/vibration specs. Use Value: 76V absolute max input accommodates 110V rail surges; thermal shutdown protects against enclosure overheating. |
Use Scenario: Powers GPS/GSM modem, MCU, and SD card in telematics units installed in construction vehicles with unstable 24V battery systems. IC Role / Device Role / Timing Role: Primary DC-DC stage providing regulated 5V output despite cold-cranking (6V) and load-dump (60V+) events. Use Value: Undervoltage lockout (5.2V) prevents brownout operation; pulse-skipping extends runtime during intermittent engine-off periods. |
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 |
|---|---|---|---|
| LM5017MH/NOPB | Fixed 500kHz switching frequency; requires external compensation; 65V max input; 0.5A output. | Higher frequency enables smaller magnetics but lower current capability; less suitable for 1A automotive loads. | Choose LM5017MH/NOPB only when board space is constrained and output current ≤0.5A is sufficient. |
| TPS54360DGQR | 60V max input; adjustable output; 3.5A output; requires external MOSFET; higher IQ (145µA). | Higher current capability but incompatible with 76V inputs; lacks integrated high-side FET and automotive temp grade. | Select TPS54360DGQR if >1A output is needed and input stays ≤60V; not suitable for MAX5035DASA-T's 76V/automotive use cases. |
Compared with LM5017MH/NOPB and TPS54360DGQR, MAX5035DASA-T uniquely combines 76V input rating, integrated 1A FET, automotive temperature range, and ultra-low 270µA quiescent current-making it the only drop-in solution for high-reliability, high-input-voltage automotive and industrial buck conversion.
Availability
MAX5035DASA-T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, railway signaling systems, and off-highway telematics requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX5035DASA-T 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 optimized for automotive and industrial environments where wide input range, low quiescent current, and robust protection are mandatory.
FAQ
What is the maximum input voltage supported by the MAX5035DASA-T?
The MAX5035DASA-T supports an absolute maximum input voltage of +80V, with guaranteed operation across 7.5V to 76V. This range covers automotive 12V/24V/48V systems, including transient conditions like load dump (up to +76V), making it suitable for under-hood applications where voltage spikes occur.
How do I set the output voltage for the MAX5035DASA-T?
The MAX5035DASA-T is an adjustable version: connect a resistive divider from VOUT to GND, with the midpoint to the FB pin. Use R4 < 15kΩ and calculate R3 = R4 × (VOUT − 1.221)/1.221. For example, for 5V output with R4 = 13.3kΩ, R3 ≈ 41.2kΩ-matching the typical application circuit shown in the MAX5035DASA-T datasheet.
Does the MAX5035DASA-T include internal compensation?
Yes, the MAX5035DASA-T features fully internal frequency compensation. No external compensation components are required-this simplifies design, reduces bill-of-materials cost, and ensures stable operation with standard LC output filters, as validated in Maxim's typical application circuits.
What protection features does the MAX5035DASA-T provide?
The MAX5035DASA-T includes undervoltage lockout (5.2V typ), cycle-by-cycle current limiting (1.3–2.5A), hiccup-mode short-circuit protection, thermal shutdown at +160°C (with +20°C hysteresis), and internal soft-start (400µs). These features ensure safe, reliable operation in unattended or harsh-environment applications.
Is the MAX5035DASA-T qualified for automotive applications?
Yes, the MAX5035DASA-T is specified for -40°C to +125°C ambient operation and carries the /V suffix indicating automotive qualification. It meets AEC-Q100 stress testing requirements and is designed for under-hood, chassis, and cab-mounted automotive subsystems requiring high reliability.
MAX5035DASA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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):
- 1.25V
- Voltage - Output (Max):
- 13.2V
- Current - Output:
- 1A
- Frequency - Switching:
- 125kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX5035DASA-T FAQ
1.How can I place an order for MAX5035DASA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5035DASA-T 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 MAX5035DASA-T reliable?
The price and inventory of MAX5035DASA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5035DASA-T is usually 5 days.
3.What payment methods are accepted for MAX5035DASA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5035DASA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5035DASA-T?
MAX5035DASA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5035DASA-T 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 MAX5035DASA-T?
For technical support, including MAX5035DASA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5035DASA-T requirements.
6.How does Aetrix verify that MAX5035DASA-T is sourced from the original manufacturer or authorized distributors?
All MAX5035DASA-T 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 MAX5035DASA-T meets industry standards.
7.What is the process for return or replacement of MAX5035DASA-T?
All MAX5035DASA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5035DASA-T, 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 MAX5035DASA-T part is unused and in its original packaging.
Return procedure for MAX5035DASA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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