My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX5035EASA+
- Part No.:
- MAX5035EASA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX5035EASA+.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:222
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX5035EASA+ from Maxim Integrated is a high-voltage, 76V-input, 1A step-down DC-DC converter with fixed 125kHz PWM operation and automatic pulse-skipping mode for light-load efficiency. It integrates a 0.4Ω high-side DMOS FET, internal frequency compensation, and delivers adjustable output (1.25V–13.2V) via FB pin. Used in automotive power supplies where wide VIN and low quiescent current (270µA no-load) are critical.
For engineers reviewing the MAX5035EASA+ datasheet, MAX5035EASA+ pinout, MAX5035EASA+ application, or MAX5035EASA+ equivalent, this page provides verified technical context, package-specific design meaning, automotive-grade thermal behavior (-40°C to +125°C), and real-world selection guidance for high-reliability industrial and vehicle subsystems.
Technical Context
The MAX5035EASA+ implements voltage-mode control with feed-forward compensation and an integrated high-side N-channel DMOS switch. Its 125kHz fixed-frequency PWM transitions to pulse-skipping below ~85mA load to maintain >85% efficiency at 10mA while holding IQ ≤ 460µA across full temperature range.
It features undervoltage lockout (5.2V typ), hiccup-mode short-circuit protection, thermal shutdown at +160°C (20°C hysteresis), and a dedicated VD regulator (7.8V typ) for BST capacitor charging. The FB pin regulates to 1.221V (±0.029V) with ±150nA bias current, enabling precise external resistor-set outputs from 1.25V to 13.2V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports 24V/48V/72V industrial and automotive battery rails without pre-regulation. |
| Output Current | 1A continuous - limited by SO-package thermal resistance (170°C/W) and internal 1.9A peak switch current limit. |
| Quiescent Current | 270µA (typ) at no load - enables always-on subsystems with <1mW standby loss at 12V input. |
| Switch On-Resistance | 0.4Ω (typ) - reduces conduction loss and improves full-load efficiency up to 94% at 24V→12V/0.5A. |
| Feedback Voltage | 1.221V (±0.029V) - sets output accuracy for adjustable versions; enables ±1.5% VOUT tolerance with 1% resistors. |
| Shutdown Current | 10µA (typ) - allows deep-sleep states in battery-powered telematics modules. |
| Oscillator Frequency | 125kHz (109–137kHz over temp) - balances EMI control, inductor size, and transient response for 100µH designs. |
Pinout & Package
MAX5035EASA+ uses an 8-pin SO (Small Outline) package rated for -40°C to +125°C operation. Thermal pad is not present; PCB copper pour under exposed pad area is recommended for heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BST | Bootstrap capacitor connection | Must connect 0.1µF ceramic cap between BST and LX to drive high-side DMOS gate; failure causes startup failure or erratic switching. |
| 2 - VD | Internal regulator output | Provides ~7.8V bias for BST circuit; requires 0.1µF ceramic bypass to GND near pin to stabilize gate drive. |
| 3 - SGND | Signal ground reference | Internal analog ground node; must be tied directly to system GND plane - not isolated or star-point filtered. |
| 4 - FB | Output voltage feedback input | Senses divider voltage; regulates to 1.221V - sets VOUT = 1.221 × (1 + R3/R4); max 15kΩ R4 for noise immunity. |
| 5 - ON/OFF | Enable/shutdown control | Rising threshold 1.65V (typ); 100mV hysteresis prevents chatter; drives low (<0.8V) to enter 10µA shutdown state. |
| 6 - GND | Power ground return | Main return path for LX switch current and output capacitor discharge; must tie to same plane as SGND and rectifier cathode. |
| 7 - VIN | Main input supply | Accepts 7.5–76V; requires low-ESR input capacitor (e.g., 68µF aluminum + 1µF ceramic) placed within 5mm. |
| 8 - LX | Switch node | Connects to inductor and Schottky anode; carries high di/dt; layout must minimize loop area to reduce EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Internal frequency compensation | Eliminates external compensation network - simplifies layout and ensures stable operation with standard 100µH inductors and 68µF output caps. |
| Pulse-skipping light-load mode | Maintains >85% efficiency at 10mA load while reducing IQ to 270µA - critical for always-on CAN bus nodes and sensor hubs. |
| Hiccup-mode short-circuit protection | Disables switching during sustained overload, then retries after cooldown - prevents thermal runaway during wiring faults in vehicle harnesses. |
| Automotive temperature grade | -40°C to +125°C junction rating with 170°C/W θJA - validated for engine bay and ADAS ECU mounting without derating. |
| Integrated 0.4Ω high-side DMOS | Reduces BOM count vs. controller-only solutions; eliminates gate driver design and MOSFET selection effort for 1A applications. |
Applications
| Automotive Body Control Module (BCM) | Industrial Programmable Logic Controller (PLC) I/O Power |
|---|---|
Use Scenario: Powering microcontrollers, CAN transceivers, and sensor interfaces from 12V/24V battery with cold-crank tolerance down to 6V. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator supplying logic rails; handles 76V load-dump transients without external TVS. Use Value: 270µA quiescent current extends battery life during vehicle sleep mode; 125kHz switching avoids AM radio band interference. |
Use Scenario: Generating isolated 5V/12V rails for digital I/O modules in factory automation cabinets with 48V DC distribution. IC Role / Device Role / Timing Role: Non-isolated point-of-load regulator converting 48V backplane to 5V logic; operates continuously at 60°C ambient. Use Value: 94% efficiency at 24V→12V/0.5A reduces heat sink requirements; SO package fits dense 2-layer PCB layouts. |
| Commercial Telematics Unit (TCU) | Railway Signaling Interface Power |
Use Scenario: Providing regulated 3.3V for GPS/GNSS receivers and cellular modems in fleet management devices powered by 24V truck batteries. IC Role / Device Role / Timing Role: Always-on power stage enabling fast wake-from-sleep; supports ON/OFF-controlled deep-sleep modes. Use Value: 10µA shutdown current meets ISO 16750-2 quiescent drain limits; adjustable output accommodates future modem voltage variants. |
Use Scenario: Converting 72V nominal railway traction supply to 5V for LED status indicators and optocoupler drivers in signaling relays. IC Role / Device Role / Timing Role: High-input-voltage primary regulator surviving 100V surge events per EN 50155; operates at full 1A with forced air cooling. Use Value: 76V absolute max rating exceeds EN 50155 Class S3 surge requirement; thermal shutdown protects against prolonged overtemperature. |
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 |
|---|---|---|---|
| LM5017MMX/NOPB | 42V max input, 600mA output, 100–1000kHz adjustable frequency, no internal compensation. | Limited to lower-voltage industrial systems; requires external compensation components and higher-current external FET for 1A loads. | Choose LM5017MMX/NOPB only if 42V input ceiling is acceptable and board space allows added compensation network. |
| TPS54360DGQR | 60V max input, 3.5A output, 100–2500kHz adjustable frequency, integrated soft-start, no VD rail. | Higher current capability but lacks dedicated VD regulator for bootstrap stability at ultra-low duty cycles. | Select TPS54360DGQR when >1A output or programmable frequency is required, accepting larger solution size and missing VD rail. |
Compared with LM5017MMX/NOPB and TPS54360DGQR, the MAX5035EASA+ uniquely combines 76V input tolerance, internal compensation, and a dedicated VD regulator - making it optimal for space-constrained, high-reliability automotive and rail applications where input transients exceed 60V and layout simplicity is critical.
Availability
MAX5035EASA+ is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, commercial telematics units, and railway signaling interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX5035EASA+ 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+ belongs to the MAXPower™ family of high-voltage DC-DC converters engineered specifically for automotive and industrial environments where input voltage extremes, thermal robustness, and minimal external components are mandatory.
FAQ
What is the maximum input voltage supported by the MAX5035EASA+?
The MAX5035EASA+ supports a maximum input voltage of 76V, with absolute maximum rating up to +80V on the VIN pin. This enables direct connection to 24V, 48V, and 72V battery systems including automotive load-dump conditions. Operation above 76V risks permanent damage, and the internal undervoltage lockout activates at 5.2V (typ) to prevent startup below safe operating thresholds.
How does the MAX5035EASA+ achieve adjustable output voltage?
The MAX5035EASA+ achieves adjustable output voltage using its FB pin, which regulates to a precise 1.221V reference. An external resistor divider (R3/R4) connects from VOUT to GND, with the midpoint fed to FB. For example, setting R4 = 13.3kΩ and R3 = 41.2kΩ yields 5.0V output. The MAX5035EASA+ datasheet specifies R4 ≤ 15kΩ for optimal noise immunity and bias current error control.
What package type and temperature range does the MAX5035EASA+ use?
The MAX5035EASA+ uses an 8-pin SO (Small Outline) package with lead(Pb)-free/RoHS-compliant finish (+ suffix). It is rated for operation from -40°C to +125°C ambient temperature, meeting automotive AEC-Q100 stress test requirements. Its thermal resistance is 170°C/W (junction-to-ambient, JEDEC 51), requiring adequate PCB copper pour for 1A continuous operation at high ambient temperatures.
Does the MAX5035EASA+ require external compensation components?
No, the MAX5035EASA+ includes fully internal frequency compensation optimized for standard 100µH inductors and 68µF output capacitors. This eliminates external Type II or Type III compensation networks, reducing BOM count and layout sensitivity. The internal compensation ensures stable closed-loop bandwidth and phase margin across the full input/output/load/temperature range without user tuning.
What protection features are built into the MAX5035EASA+?
The MAX5035EASA+ integrates undervoltage lockout (5.2V typ), cycle-by-cycle current limiting (1.9A typ peak), hiccup-mode short-circuit protection, thermal shutdown at +160°C (20°C hysteresis), and BST overvoltage clamping. These features enable robust operation in harsh environments such as automotive engine compartments and industrial control cabinets without additional discrete protection circuitry.
MAX5035EASA+ 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:
- 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX5035EASA+ FAQ
1.How can I place an order for MAX5035EASA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5035EASA+ 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+ reliable?
The price and inventory of MAX5035EASA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5035EASA+ is usually 5 days.
3.What payment methods are accepted for MAX5035EASA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5035EASA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5035EASA+?
MAX5035EASA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5035EASA+ 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+?
For technical support, including MAX5035EASA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5035EASA+ requirements.
6.How does Aetrix verify that MAX5035EASA+ is sourced from the original manufacturer or authorized distributors?
All MAX5035EASA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX5035EASA+?
All MAX5035EASA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5035EASA+, 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+ part is unused and in its original packaging.
Return procedure for MAX5035EASA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX5035EASA+ 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…
