My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX5035AASA+
- Part No.:
- MAX5035AASA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX5035AASA+.pdf
- Description:
- IC REG BUCK 3.3V 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,279
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX5035AASA+ 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. Used in automotive power supplies where wide VIN and high reliability are required.
For engineers reviewing the MAX5035AASA+ datasheet, MAX5035AASA+ pinout, MAX5035AASA+ application, or MAX5035AASA+ equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade (-40°C to +125°C) operation, and real-world alternative part comparisons - all grounded in Maxim's official electrical characteristics and typical operating data.
Technical Context
This voltage-mode buck converter uses internal voltage feed-forward control and an integrated high-side N-channel DMOS switch to maintain stable regulation across its 7.5V–76V input range. Its fixed 125kHz oscillator (105–137kHz over temperature) enables predictable EMI filtering and supports up to 1A continuous output with cycle-by-cycle current limiting.
It features undervoltage lockout (5.2V typ), thermal shutdown at +160°C with 20°C hysteresis, hiccup-mode short-circuit protection, and a dedicated VD regulator (7.8V typ) for bootstrap gate drive. The FB pin regulates at 1.221V (±0.029V) for precise 3.3V output (±3.5% over line/load/temp).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports 12V/24V/48V industrial and automotive battery systems with transient tolerance up to 80V. |
| Output Voltage | 3.3V ±3.5% - tightly regulated fixed output suitable for powering microcontrollers, sensors, and interface ICs. |
| Max Output Current | 1A continuous - limited by package thermal resistance (170°C/W for SO-8) and internal 1.9A peak switch current limit. |
| Quiescent Current | 270µA (typ) at no load - enables low-power always-on subsystems without compromising battery life. |
| Switching Frequency | 125kHz (105–137kHz over temp) - balances efficiency, inductor size, and EMI filter complexity. |
| Shutdown Current | 10µA (typ) - ensures minimal leakage during system sleep modes. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and harsh industrial environments. |
Pinout & Package
MAX5035AASA+ is housed in an 8-pin SO (Small Outline) package with exposed pad for thermal enhancement, rated for automotive temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor connection | Drives high-side FET gate via 0.1µF ceramic cap between BST and LX; enables efficient 76V operation. |
| VD | Internal regulator output | Provides ~7.8V bias for internal circuitry and BST charging; requires 0.1µF bypass to GND. |
| SGND | Signal ground reference | Internal analog ground node; must be connected directly to PCB power ground plane. |
| FB | Feedback sense input | Monitors output via direct connection (3.3V version); regulates at 1.221V reference for ±3.5% accuracy. |
| ON/OFF | Enable/shutdown control | Active-high logic input; 1.69V typical threshold with 100mV hysteresis; draws ≤150nA. |
| GND | Power ground return | Main power return path for LX switch and output rectifier; connects to SGND internally. |
| VIN | Main input supply | Accepts 7.5V–76V; requires local low-ESR bulk capacitance (e.g., 68µF) near the pin. |
| LX | Switch node | Drains high-side DMOS source; connects to external Schottky diode cathode and inductor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.4Ω high-side DMOS FET | Eliminates external MOSFET, reduces BOM count, and improves efficiency at 12V–48V inputs. |
| Internal frequency compensation | Enables stable loop response with minimal external components-no compensation network required. |
| Pulse-skipping light-load mode | Maintains >80% efficiency down to 1mA load while holding IQ at 270µA, critical for standby power budgets. |
| Hiccup-mode short-circuit protection | Prevents thermal runaway during sustained output faults by cycling on/off until fault clears. |
| Automotive-grade temperature range | Guaranteed operation from -40°C to +125°C junction temperature, with thermal shutdown at +160°C. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Supply |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and sensor interfaces in vehicle door modules exposed to cold cranking (6V) and load dump (80V) events. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering clean, regulated power with UVLO and thermal protection. Use Value: Withstands 76V max input and -40°C to +125°C operation, eliminating need for external TVS or derating. | Use Scenario: Supplies isolated 3.3V logic rails for digital input/output cards in programmable logic controllers operating in factory environments. IC Role / Device Role / Timing Role: High-reliability DC-DC converter providing stable 3.3V from 24V DC bus with low ripple and fast transient response. Use Value: 1A output and 90%+ efficiency at 0.5A reduce heat buildup in dense backplane enclosures. |
| Railway Onboard Telematics Unit | Commercial HVAC Controller |
Use Scenario: Powers ARM-based telematics processor and cellular modem in train-mounted equipment subject to wide input variation (18V–110V nominal). IC Role / Device Role / Timing Role: Input-tolerant step-down regulator enabling single-rail design across multiple rail voltages. Use Value: 7.5V–76V input range covers EN 50155-compliant 24V/36V/72V systems without redesign. | Use Scenario: Provides 3.3V for MCU, display driver, and environmental sensors in wall-mounted HVAC controllers installed in unconditioned spaces. IC Role / Device Role / Timing Role: Main system power IC with shutdown control for energy-saving sleep cycles. Use Value: 10µA shutdown current and automotive temp rating ensure reliable operation in attic or outdoor 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 | Fixed 125kHz frequency, 1A output, but requires external compensation and has higher 1.2mA quiescent current. | Not qualified for automotive temp range; max operating temp is +125°C ambient (not junction), no thermal hysteresis spec. | Choose LM5017MM/NOPB only if external compensation is acceptable and ambient temperature stays below 105°C. |
| TPS54360BDDAR | Adjustable output (1.22V–60V), 3.5A output, but lacks integrated high-side FET driver optimization for >60V VIN and has 146µA typical IQ (higher than MAX5035AASA+). | Rated only for -40°C to +125°C ambient (not junction); no hiccup-mode short-circuit protection. | Use TPS54360BDDAR when higher output current or adjustable VOUT is needed, but verify thermal margin at full load in sealed enclosures. |
Compared with LM5017MM/NOPB and TPS54360BDDAR, the MAX5035AASA+ offers lower quiescent current (270µA vs. ≥146µA), guaranteed junction-temp-rated automotive operation, integrated compensation, and hiccup-mode fault recovery - making it optimal for space-constrained, thermally demanding 3.3V automotive and industrial supplies.
Availability
MAX5035AASA+ is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power rails, and railway telematics requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MAX5035AASA+ 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-input-voltage, high-efficiency step-down converters optimized for automotive and industrial power systems where reliability across extreme temperatures and input transients is mandatory.
FAQ
What is the maximum input voltage rating for the MAX5035AASA+?
The MAX5035AASA+ has an absolute maximum input voltage rating of +80V, with recommended continuous operation from 7.5V to 76V. This allows robust use in automotive systems experiencing cold crank (down to 6V) and load dump (up to 80V) events, while maintaining regulation and protection functionality throughout.
Does the MAX5035AASA+ require external compensation components?
No, the MAX5035AASA+ includes internal frequency compensation optimized for stability with standard external LC filters. Maxim's datasheet explicitly states that no external compensation network is required - simplifying layout and reducing BOM count compared to controllers like the LM5017.
What is the output voltage tolerance of the MAX5035AASA+ over temperature and load?
The MAX5035AASA+ delivers 3.3V output with ±3.5% total error over -40°C to +125°C junction temperature, full input range (7.5V–76V), and 20mA–1A load. This is confirmed by the Electrical Characteristics table showing 3.185V (min) to 3.415V (max) at TA = -40°C to +125°C.
How does the MAX5035AASA+ handle short-circuit conditions?
The MAX5035AASA+ employs hiccup-mode short-circuit protection: upon detecting overcurrent, it shuts down, cools, then attempts restart. This prevents thermal runaway and device damage during sustained faults - unlike latch-off or constant-current limit schemes used in some alternatives.
Is the MAX5035AASA+ pin-compatible with other variants in the MAX5035 family?
Yes, all MAX5035 variants (A/B/C/D/E, USA/UPA/ASA) share identical 8-pin SO and PDIP footprints and pinouts. The MAX5035AASA+ is functionally and physically interchangeable with MAX5035BASA+ or MAX5035DASA+, differing only in output voltage configuration and internal feedback reference.
MAX5035AASA+ 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):
- 3.3V
- Voltage - Output (Max):
- -
- 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
MAX5035AASA+ FAQ
1.How can I place an order for MAX5035AASA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5035AASA+ 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 MAX5035AASA+ reliable?
The price and inventory of MAX5035AASA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5035AASA+ is usually 5 days.
3.What payment methods are accepted for MAX5035AASA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5035AASA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5035AASA+?
MAX5035AASA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5035AASA+ 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 MAX5035AASA+?
For technical support, including MAX5035AASA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5035AASA+ requirements.
6.How does Aetrix verify that MAX5035AASA+ is sourced from the original manufacturer or authorized distributors?
All MAX5035AASA+ 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 MAX5035AASA+ meets industry standards.
7.What is the process for return or replacement of MAX5035AASA+?
All MAX5035AASA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5035AASA+, 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 MAX5035AASA+ part is unused and in its original packaging.
Return procedure for MAX5035AASA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX5035AASA+ 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…
