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Analog Devices Inc./Maxim Integrated MAX5035EASA/V+T
- Part No.:
- MAX5035EASA/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
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MAX5035EASA/V+T.pdf
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- IC REG
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Product details
Overview
MAX5035EASA/V+T from Maxim Integrated is an automotive-grade, high-voltage (7.5V–76V), 1A step-down DC-DC converter with adjustable output (1.25V–13.2V), internal 0.4Ω high-side DMOS FET, fixed 125kHz PWM switching, and pulse-skipping mode for light-load efficiency. It delivers up to 94% efficiency at 0.5A/24VIN→5VOUT, operates across –40°C to +125°C, and is used in distributed power supplies for industrial control systems requiring robust input transient handling.
For engineers reviewing the MAX5035EASA/V+T datasheet, MAX5035EASA/V+T pinout, MAX5035EASA/V+T application, or MAX5035EASA/V+T equivalent, key selection criteria include its 76V absolute max input rating, 1.22V feedback reference, 10µA shutdown current, thermal shutdown at +160°C, and SO-8 package compatibility with automotive PCB layouts.
Technical Context
The MAX5035EASA/V+T implements voltage-mode PWM control with feed-forward compensation and integrated frequency compensation-eliminating external loop components. Its internal architecture includes a dedicated VD regulator (7.8V typ) for BST capacitor charging, cycle-by-cycle current limiting (1.3–2.5A), and hiccup-mode short-circuit protection triggered by sustained overcurrent.
It supports programmable undervoltage lockout via the ON/OFF pin (1.65V typ rising threshold, 100mV hysteresis), uses a bootstrap gate drive (BST–LX) for the high-side N-channel DMOS switch, and features a Type III compensation network embedded in the error amplifier-enabling stable operation with standard LC output filters without external compensation networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports wide industrial and automotive battery inputs including 24V, 36V, and 48V nominal systems with surge tolerance. |
| Output Voltage Range | Adjustable 1.25V to 13.2V - set via external resistor divider on FB pin; regulated to ±1.2% over temperature and line/load. |
| Max Output Current | 1A continuous - limited by package thermal resistance (θJA = 170°C/W for SO-8) and internal current limit (1.9A typ). |
| Quiescent Current | 270µA at no load - enables low-power standby in always-on automotive modules without compromising startup time. |
| Switching Frequency | Fixed 125kHz (±10kHz) - ensures predictable EMI profile and simplifies filter design vs. variable-frequency PFM-only converters. |
| Feedback Reference | 1.221V (typ) at FB pin - defines output regulation point; enables precise output setting with <1% resistor tolerance. |
| Shutdown Current | 10µA (typ) - reduces system-level standby power in battery-backed applications such as telematics or ADAS sensors. |
Pinout & Package
MAX5035EASA/V+T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and automotive-qualified (–40°C to +125°C). The package has gull-wing leads, JEDEC MS-012AC outline, and 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor connection | Provides gate-drive voltage for internal high-side DMOS; requires 0.1µF ceramic capacitor between BST and LX for proper switching. |
| VD | Internal regulator output | Supplies ~7.8V bias for BST charging and analog circuitry; 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 plane to avoid regulation error and noise coupling. |
| FB | Feedback input | Senses output voltage via resistive divider; regulates VOUT to 1.221V at FB; sets output with R3/R4 per VOUT = 1.221 × (1 + R3/R4). |
| ON/OFF | Enable/shutdown control | Logic-level input: >1.65V (typ) enables operation; <1.5V (typ) disables switching and reduces IQ to 10µA. |
| GND | Power ground return | Main return path for high-current LX switching node and internal regulator; must be tied to SGND at single-point star ground. |
| VIN | Main input supply | Accepts 7.5V–76V DC; requires local low-ESR input capacitor (e.g., 68µF aluminum + 0.1µF ceramic) near pin. |
| LX | Switch node | Drives external inductor; connects internally to source of high-side DMOS; voltage swings from GND to VIN during operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side DMOS FET | 0.4Ω RDS(ON) - eliminates external MOSFET, reduces BOM count, and improves efficiency at 1A load vs. discrete solutions. |
| Internal frequency compensation | Type III network embedded in error amplifier - removes need for external compensation components, enabling stable 1A operation with standard 100µH inductors. |
| Pulse-skipping light-load mode | Reduces quiescent current to 270µA while maintaining regulation - extends battery life in intermittent-duty applications like CAN bus nodes. |
| Hiccup-mode short-circuit protection | Disables switching after fault detection, cools die, then retries - prevents thermal runaway during sustained output shorts in unattended systems. |
| Automotive temperature range | –40°C to +125°C operation - qualified per AEC-Q100 stress test requirements for under-hood and chassis-mounted power rails. |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Provides isolated 5V rail for microcontroller, CAN transceiver, and sensor interfaces in programmable logic controllers exposed to 48V DC field wiring. IC Role / Device Role / Timing Role: Primary buck regulator converting 36V–60V industrial bus to stable 5V at 1A with ripple <50mVPP. Use Value: Withstands 76V transients per ISO 7637-2 Pulse 1/2b, maintains regulation during brownouts, and enables compact layout via integrated FET and compensation. | Use Scenario: Powers MCU and door-lock actuators in vehicle body control units where input derives from 12V battery with load-dump spikes up to 60V. IC Role / Device Role / Timing Role: Adjustable-output buck converter set to 3.3V for low-power logic, operating continuously across full automotive temperature range. Use Value: 10µA shutdown current minimizes parasitic drain; thermal shutdown at +160°C prevents failure during engine-bay thermal soak testing. |
| Distributed Telecom Power | Railway Signaling Interface |
Use Scenario: Generates 12V auxiliary supply from 72V DC traction battery in onboard communication gateways for train control networks. IC Role / Device Role / Timing Role: High-efficiency (94% @ 0.5A) step-down converter delivering 12V at up to 1A with minimal heatsinking. Use Value: 76V absolute max rating accommodates EN 50155 overvoltage conditions; adjustable output allows reuse across multiple subsystem voltages. | Use Scenario: Supplies 5V to isolated RS-485 transceivers and watchdog circuits in trackside signaling equipment powered from 24V DC backup batteries. IC Role / Device Role / Timing Role: Input-filter tolerant buck regulator accepting 18V–32V input with tight line regulation (<0.2% change over 7.5V–76V). Use Value: Internal UVLO and ON/OFF-controlled enable allow safe power sequencing with upstream battery management ICs. |
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 |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5V–65V input, 1A, 1.5MHz switching, external MOSFET required, no integrated VD regulator | Higher frequency enables smaller magnetics but demands more careful layout; lacks internal bootstrap regulator | Choose LM5164QPWPRQ1 when board space is constrained and higher switching frequency justifies added complexity. |
| TPS54160A-Q1 | 3.5V–60V input, 1.5A, 100kHz–2.5MHz programmable frequency, integrated compensation, no VD regulator | Lower max input voltage (60V vs. 76V); wider frequency range increases EMI filtering flexibility but adds configuration overhead | Choose TPS54160A-Q1 when input never exceeds 60V and programmable frequency is needed for EMI compliance. |
Compared with LM5164QPWPRQ1 and TPS54160A-Q1, the MAX5035EASA/V+T provides higher input voltage tolerance (76V), integrated VD regulator for simplified BST drive, and guaranteed automotive temperature operation without derating-making it optimal for harsh-environment 48V+ systems where reliability trumps layout density.
Availability
MAX5035EASA/V+T is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and railway signaling applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for MAX5035EASA/V+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 MAX5035EASA/V+T belongs to the MAXPower™ family of high-voltage DC-DC converters engineered for reliable operation in automotive and industrial environments where wide input ranges, high efficiency, and robust protection are mandatory.
FAQ
What is the maximum input voltage rating for the MAX5035EASA/V+T?
The MAX5035EASA/V+T has an absolute maximum input voltage rating of +80V, with recommended continuous operation up to +76V. This allows safe use in 48V and 60V industrial systems and automotive applications subject to load-dump transients per ISO 7637-2. Operation beyond 76V is not advised for long-term reliability, even though the device may survive brief transients.
How do I configure the output voltage for the MAX5035EASA/V+T?
The MAX5035EASA/V+T is an adjustable-output variant: connect a resistive divider from VOUT to GND with the midpoint to the FB pin. Use VOUT = 1.221V × (1 + R3/R4), where R4 ≤ 15kΩ. For example, 13.3kΩ (R4) and 41.2kΩ (R3) set VOUT = 5V. Ensure both resistors are 1% tolerance metal-film types placed close to the FB pin.
Does the MAX5035EASA/V+T require external compensation components?
No, the MAX5035EASA/V+T includes fully integrated Type III frequency compensation. No external capacitors or resistors are needed on the COMP or FB pins. This simplifies design and improves stability across all loads and input voltages-verified in the datasheet's typical application circuits using only standard 100µH inductors and 68µF output capacitors.
What protection features does the MAX5035EASA/V+T include?
The MAX5035EASA/V+T integrates undervoltage lockout (UVLO), cycle-by-cycle current limiting, hiccup-mode short-circuit protection, thermal shutdown (+160°C trip, +140°C recovery), and BST overvoltage clamping. These operate autonomously without external components-ensuring fail-safe behavior during input surges, output shorts, or ambient overheating in unattended deployments.
Is the MAX5035EASA/V+T pin-compatible with other MAX5035 variants?
Yes, all MAX5035 variants-including MAX5035AASA/V+T, MAX5035BASA/V+T, and MAX5035EASA/V+T-share identical 8-pin SO packaging and pinout. The only functional differences are output voltage configuration (fixed vs. adjustable) and minor parameter tolerances; no PCB redesign is needed when migrating between versions for voltage optimization or qualification upgrades.
MAX5035EASA/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
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- -
- Supplier Device Package:
- -
MAX5035EASA/V+T FAQ
1.How can I place an order for MAX5035EASA/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5035EASA/V+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 MAX5035EASA/V+T reliable?
The price and inventory of MAX5035EASA/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5035EASA/V+T is usually 5 days.
3.What payment methods are accepted for MAX5035EASA/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5035EASA/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5035EASA/V+T?
MAX5035EASA/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5035EASA/V+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 MAX5035EASA/V+T?
For technical support, including MAX5035EASA/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5035EASA/V+T requirements.
6.How does Aetrix verify that MAX5035EASA/V+T is sourced from the original manufacturer or authorized distributors?
All MAX5035EASA/V+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 MAX5035EASA/V+T meets industry standards.
7.What is the process for return or replacement of MAX5035EASA/V+T?
All MAX5035EASA/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5035EASA/V+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 MAX5035EASA/V+T part is unused and in its original packaging.
Return procedure for MAX5035EASA/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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