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Analog Devices Inc./Maxim Integrated MAX5035BASA/V+
- Part No.:
- MAX5035BASA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX5035BASA/V+.pdf
- Description:
- IC REG BUCK 5V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:114
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Product details
Overview
The MAX5035BASA/V+ from Maxim Integrated is a high-voltage, 1A step-down DC-DC converter with fixed 5V output, operating from 7.5V to 76V input and delivering up to 90% efficiency at 12VIN/0.5AOUT. It integrates a 0.4Ω high-side DMOS FET, internal frequency compensation, and automotive-grade (-40°C to +125°C) SO-8 packaging. Used in automotive power supplies for infotainment and ADAS modules requiring stable 5V rail generation under wide-input transients.
For engineers reviewing the MAX5035BASA/V+ datasheet, MAX5035BASA/V+ pinout, MAX5035BASA/V+ application, or MAX5035BASA/V+ equivalent, key selection criteria include its 125kHz fixed-frequency PWM/pulse-skipping operation, 270µA no-load quiescent current, undervoltage lockout (5.2V typ), thermal shutdown (+160°C), and automotive qualification with Pb-free/RoHS compliance.
Technical Context
This voltage-mode buck regulator uses feed-forward control and an integrated high-voltage DMOS switch to maintain regulation across a 10:1 input range. Its internal 7.8V linear regulator (VD pin) powers gate drive and analog circuitry, while BST-to-LX bootstrap operation enables N-channel high-side switching without external charge pumps.
The device implements cycle-by-cycle current limiting (1.9A typ peak), hiccup-mode short-circuit protection, and automatic transition between PWM and pulse-skipping modes below ~85mA load to sustain high light-load efficiency. Shutdown is controlled via ON/OFF pin with 1.69V rising threshold and 100mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports 12V/24V/48V automotive battery systems including cold-crank and load-dump conditions. |
| Output Voltage | Fixed 5.0V ±2.5% - tightly regulated for USB peripherals, microcontrollers, and sensors without external feedback resistors. |
| Max Output Current | 1A continuous - limited by package thermal resistance (SO-8: 471mW @ +70°C) and internal 1.9A current limit. |
| Switching Frequency | 125kHz (109–137kHz) - fixed-frequency PWM with automatic pulse-skipping below PFM threshold (~85mA). |
| Quiescent Current | 270µA (typ) at no load - enables always-on subsystems (e.g., CAN wake-up receivers) with minimal battery drain. |
| Shutdown Current | 10µA (typ) - reduces system standby power when ON/OFF pin is pulled low. |
| Thermal Shutdown | +160°C junction temperature with +20°C hysteresis - protects against sustained overload or poor heatsinking. |
Pinout & Package
MAX5035BASA/V+ is housed in an 8-pin SO (Small Outline) package compliant with JEDEC MS-012, rated for -40°C to +125°C operation and RoHS/Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor connection | Connects 0.1µF ceramic cap to LX to generate gate-drive voltage for internal high-side N-MOSFET. |
| VD | Internal regulator output | Provides 7.8V (±1.3V) bias for gate driver and analog circuits; bypass with 0.1µF ceramic to GND. |
| SGND | Signal ground reference | Internal analog ground node; must be tied to system GND at single-point star ground. |
| FB | Feedback sense input | Connected directly to VOUT for fixed 5V versions; regulates output using internal 1.22V reference. |
| ON/OFF | Enable/shutdown control | Logic-level input: <1.5V = shutdown (10µA IQ), >1.69V = active; 100mV hysteresis prevents chatter. |
| GND | Power ground return | Main power return path for LX switch and output rectifier; connect to SGND at single point. |
| VIN | Main input supply | Accepts 7.5–76V; requires low-ESR bulk capacitor (e.g., 68µF) placed adjacent to pin. |
| LX | Switch node | Drains internal high-side DMOS; connects to external Schottky diode cathode and inductor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side DMOS FET | 0.4Ω RDS(ON) reduces conduction loss and eliminates need for external MOSFET driver. |
| Internal frequency compensation | Eliminates external compensation network - simplifies design and improves stability across input/output ranges. |
| Automotive temperature grade | -40°C to +125°C operation with guaranteed performance - suitable for engine bay and under-hood applications. |
| Pulse-skipping light-load mode | Maintains >80% efficiency down to ~10mA load - critical for always-on vehicle networks (e.g., LIN/CAN standby). |
| Robust protection suite | Includes UVLO (5.2V), cycle-by-cycle current limit, hiccup-mode short-circuit response, and thermal shutdown. |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
Use Scenario: Powers USB ports, display controllers, and audio codecs in automotive head units exposed to 12V battery fluctuations and load-dump events. IC Role / Device Role / Timing Role: Primary 5V buck regulator providing clean, regulated rail with fast transient response to dynamic processor loads. Use Value: 90% efficiency at 0.5A reduces thermal stress in sealed enclosures; 76V input withstands ISO 7637-2 Pulse 5a (load dump). | Use Scenario: Supplies 5V to image sensor, ISP, and MIPI interface in rear-view or surround-view cameras mounted near bumpers. IC Role / Device Role / Timing Role: Compact, high-reliability DC-DC stage converting raw battery to noise-sensitive imaging rail. Use Value: 270µA quiescent current extends battery life during vehicle sleep mode; -40°C start-up ensures winter reliability. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) |
Use Scenario: Generates 5V for cellular modem, GNSS receiver, and secure MCU in connected vehicle gateways subject to extended temperature cycling. IC Role / Device Role / Timing Role: Main system power IC enabling always-on LTE/Wi-Fi connectivity with low standby power. Use Value: Automotive qualification and 10µA shutdown current meet UNECE R100 requirements for EV battery drain limits. | Use Scenario: Powers door module microcontrollers, LED drivers, and LIN transceivers in centralized body electronics architecture. IC Role / Device Role / Timing Role: High-input-range buck converter supporting 12V/24V platform commonality across vehicle lines. Use Value: Fixed 5V output eliminates external resistor network - reduces BOM count and layout area in space-constrained modules. |
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, 5V fixed, 0.5A output, 1MHz switching, no integrated VD regulator | Lower current rating; requires external bias supply; higher frequency enables smaller magnetics | Select for cost-sensitive, lower-power applications where 1A is not required and board space favors higher-frequency designs. |
| TPS54360BQDDAQ1 | 3.5–60V input, adjustable output, 3.5A output, 100–2500kHz programmable frequency, integrated soft-start | Higher current and wider adjustability; lacks automotive VD regulator; requires external feedback resistors | Choose when >1A output or programmable voltage (e.g., 3.3V/1.8V) is needed, and thermal management supports larger SO-8 package. |
Compared with LM5008AMM/NOPB and TPS54360BQDDAQ1, the MAX5035BASA/V+ delivers full 1A output with integrated 7.8V bias regulator and automotive-qualified thermal protection - making it optimal for space-constrained, high-reliability 5V systems where simplicity and robustness outweigh programmability needs.
Availability
MAX5035BASA/V+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply with guaranteed automotive temperature range and RoHS compliance.
Supply support for MAX5035BASA/V+ 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 belongs to the MAXPower™ family of high-voltage DC-DC converters engineered specifically for automotive and industrial systems needing reliable, compact, and efficient power conversion from wide-input battery rails.
FAQ
What is the maximum input voltage supported by the MAX5035BASA/V+?
The MAX5035BASA/V+ supports an absolute maximum input voltage of +80V, with recommended continuous operation from 7.5V to 76V. This range accommodates automotive battery transients including ISO 7637-2 Pulse 5a (load dump up to 76V), ensuring reliable operation in 12V and 24V vehicle platforms without external clamping.
Does the MAX5035BASA/V+ require external compensation components?
No, the MAX5035BASA/V+ features internal frequency compensation optimized for stability with standard external LC filter components. The datasheet confirms that no external compensation network is needed - simplifying layout and reducing BOM count while maintaining phase margin across the full input/output/load range.
How does the MAX5035BASA/V+ achieve low quiescent current in automotive standby mode?
The MAX5035BASA/V+ achieves 270µA typical quiescent current at no load through automatic pulse-skipping mode and highly optimized internal bias circuitry. In shutdown (ON/OFF pin <1.5V), it draws only 10µA - meeting stringent automotive "always-on" requirements such as those for CAN/LIN wake-up receivers during vehicle sleep cycles.
Can the MAX5035BASA/V+ be used with a 3.3V output instead of 5V?
No - the MAX5035BASA/V+ is a fixed-output variant specifying 5.0V ±2.5%. For 3.3V output, use the pin-compatible MAX5035AASA/V+ (3.3V version) or the adjustable MAX5035DASA/V+ (1.25–13.2V) with external resistor divider. Substituting feedback resistors on the MAX5035BASA/V+ is not possible due to internal FB reference routing.
What external components are mandatory for basic operation of the MAX5035BASA/V+?
Mandatory external components for the MAX5035BASA/V+ include: (1) 0.1µF ceramic BST capacitor between BST and LX, (2) 0.1µF ceramic VD bypass capacitor from VD to GND, (3) input bulk capacitor (e.g., 68µF low-ESR aluminum), (4) output filter capacitor (e.g., 68µF), (5) 100µH power inductor, and (6) Schottky freewheeling diode (e.g., 50SQ100). No feedback resistors are needed for fixed 5V operation.
MAX5035BASA/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 125kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX5035BASA/V+ FAQ
1.How can I place an order for MAX5035BASA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5035BASA/V+ 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 MAX5035BASA/V+ reliable?
The price and inventory of MAX5035BASA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5035BASA/V+ is usually 5 days.
3.What payment methods are accepted for MAX5035BASA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5035BASA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5035BASA/V+?
MAX5035BASA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5035BASA/V+ 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 MAX5035BASA/V+?
For technical support, including MAX5035BASA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5035BASA/V+ requirements.
6.How does Aetrix verify that MAX5035BASA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX5035BASA/V+ 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 MAX5035BASA/V+ meets industry standards.
7.What is the process for return or replacement of MAX5035BASA/V+?
All MAX5035BASA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5035BASA/V+, 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 MAX5035BASA/V+ part is unused and in its original packaging.
Return procedure for MAX5035BASA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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