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Analog Devices Inc./Maxim Integrated MAX5090AATE/V+
- Part No.:
- MAX5090AATE/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5090AATE/V+.pdf
- Description:
- IC REG BUCK 3.3V 2A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,301
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Product details
Overview
MAX5090AATE/V+ from Maxim Integrated is a high-efficiency, 2A, 76V-input synchronous step-down DC-DC converter with fixed 3.3V output, internal 0.26Ω high-side DMOS FET, 310µA no-load quiescent current, and operation across -40°C to +125°C for automotive power rails.
For engineers reviewing the MAX5090AATE/V+ datasheet, MAX5090AATE/V+ pinout, MAX5090AATE/V+ application, or MAX5090AATE/V+ equivalent, key selection criteria include input voltage range (6.5V–76V), thermal shutdown at +175°C, external synchronization capability (119–200kHz), soft-start programmability, and undervoltage lockout with 6.17V rising threshold.
Technical Context
The MAX5090AATE/V+ implements voltage-mode PWM control with voltage feed-forward and internal frequency compensation, enabling stable regulation across wide VIN variations without external loop compensation components. Its fixed 127kHz switching frequency (or externally synchronized mode) and automatic pulse-skipping at light loads optimize efficiency from full load to microamp idle states.
It integrates a high-voltage DMOS power switch, internal 7.8V analog regulator (VD), and comprehensive protection: cycle-by-cycle current limit (3.3A typ), hiccup-mode short-circuit response, and thermal shutdown with 20°C hysteresis. The ON/OFF pin supports both logic-level shutdown and external UVLO programming via resistive divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.5V to 76V - supports 12V/24V/48V industrial and automotive battery systems with headroom for transients. |
| Output Voltage | Fixed 3.3V ±3% - tightly regulated for powering MCU cores, CAN transceivers, and low-voltage logic without external feedback resistors. |
| Max Output Current | 2A continuous - delivers sufficient power for embedded controllers, sensors, and interface ICs in space-constrained designs. |
| Quiescent Current | 310µA at no load - enables always-on functionality in battery-backed or energy-sensitive applications. |
| Switching Frequency | 127kHz fixed (or 119–200kHz syncable) - balances EMI control, inductor size, and efficiency across input range. |
| Thermal Shutdown | +175°C junction with +155°C restart hysteresis - provides robust fault recovery under sustained overload or poor heatsinking. |
| Package | 16-pin TQFN-EP (5mm × 5mm) - surface-mount footprint with exposed pad for enhanced thermal dissipation (θJA = 30°C/W). |
Pinout & Package
The MAX5090AATE/V+ is housed in a 16-pin thin QFN package (5mm × 5mm) with exposed thermal pad (EP), rated for 2.67W power dissipation at +70°C per JEDEC 51 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 LX | Switch node | Connection to source of internal high-side DMOS; ties to inductor and bootstrap capacitor (BST–LX). |
| 3 BST | Bootstrap supply | Drives high-side gate via 0.22µF ceramic capacitor to LX; enables NMOS high-side switch operation. |
| 4 VIN | Main input supply | Accepts 6.5V–76V; requires local low-ESR bypass capacitor to SGND for stability and ripple suppression. |
| 5 VD | Internal analog regulator output | 7.8V ±0.6V regulated supply for internal circuitry; bypassed with 3.3µF ceramic to PGND. |
| 6 SYNC | Frequency synchronization input | Accepts external clock (119–200kHz); grounded to enable internal 127kHz oscillator. |
| 7 SS | Soft-start timing control | Connects to external capacitor to program startup ramp time; defaults to 700µs internal soft-start. |
| 8 FB | Feedback reference input | Internally tied to 3.3V output for fixed-version operation; senses regulated output voltage. |
| 9 ON/OFF | Enable/shutdown control | Logic-compatible input (1.546V rising threshold); drives low to reduce supply current to 19µA. |
| 10 SGND | Signal ground reference | Must be connected to PGND; serves as reference for FB, SS, SYNC, and ON/OFF pins. |
| 11, 15, 16 N.C. | No connection | Not internally bonded; leave unconnected and unpopulated on PCB. |
| 12 PGND | Power ground return | Primary return path for high-current LX switching node and internal power circuits. |
| 13, 14 DRAIN | High-side switch drain | Internal connection to DMOS drain; electrically tied to VIN through internal switch during conduction. |
| EP | Exposed thermal pad | Soldered to SGND plane for thermal conduction; required for meeting θJA and power dissipation specs. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side DMOS FET | 0.26Ω RDS(ON) reduces conduction loss and eliminates need for external high-voltage MOSFET. |
| Internal frequency compensation | Enables stable operation with standard 100µH inductor and 100µF output capacitor-no external compensation network required. |
| Pulse-skipping light-load mode | Maintains >80% efficiency at 1mA load while holding quiescent current at 310µA-critical for always-on systems. |
| Programmable soft-start | External capacitor on SS pin sets rise time; prevents inrush current and output overshoot during power-up or wake-from-shutdown. |
| Robust protection suite | Includes undervoltage lockout (6.17V rising), cycle-by-cycle current limit (3.3A typ), hiccup-mode short-circuit response, and thermal shutdown. |
Applications
| Automotive Body Control Module (BCM) | Industrial Programmable Logic Controller (PLC) I/O Power |
|---|---|
|
Use Scenario: Powering microcontroller, CAN transceiver, and sensor interfaces in vehicle door modules or lighting controllers. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator converting 12V/24V battery rail with transient immunity up to 76V. Use Value: Enables compact, thermally robust design meeting AEC-Q100 Grade 0 temperature requirements (-40°C to +125°C). |
Use Scenario: Providing isolated 3.3V supply for digital I/O expansion cards in modular PLC backplanes. IC Role / Device Role / Timing Role: High-reliability buck converter delivering clean, regulated 3.3V to FPGA configuration logic and level-shifters. Use Value: Delivers 2A continuous current with <3% output variation over line (6.5–76V) and load (0–2A), minimizing need for post-regulation LDOs. |
| Railway Signaling Interface Unit | Energy Metering Data Acquisition System |
|
Use Scenario: Converting 72V nominal traction battery to 3.3V for microcontroller and RS-485 transceivers in trackside signaling hardware. IC Role / Device Role / Timing Role: Input-transient-hardened DC-DC stage handling surges per EN 50155, operating continuously at +85°C ambient. Use Value: 76V absolute max rating and 310µA quiescent current support fail-safe monitoring during standby without draining backup batteries. |
Use Scenario: Powering metrology SoC, ADC, and wireless communication module in smart electricity meters deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Main 3.3V supply derived from wide-range DC input (e.g., 12–60V from auxiliary transformer or solar harvester). Use Value: Synchronization capability (119–200kHz) allows alignment with system clock to reduce conducted EMI in sensitive analog measurement paths. |
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 | 4.5–65V input, 3.3V fixed, 1A output, 300kHz syncable, no integrated high-side FET (external needed) | Lower current capability and narrower input range; requires external MOSFET and compensation network | Select when higher switching frequency is prioritized over integration and current capability |
| TPS54260DGQR | 3.5–60V input, adjustable output, 2.5A, 100kHz–2.5MHz syncable, integrated 0.11Ω FET, but only -40°C to +125°C with derating | Wider frequency range and lower RDS(ON), but lacks guaranteed automotive temp performance above +105°C | Select when programmable output and higher frequency flexibility outweigh guaranteed +125°C operation |
Compared with LM5164QPWPRQ1 and TPS54260DGQR, the MAX5090AATE/V+ uniquely combines 76V max input, guaranteed -40°C to +125°C operation, fixed 3.3V output, and fully integrated 0.26Ω FET-reducing BOM count and layout complexity for automotive and harsh-environment applications.
Availability
MAX5090AATE/V+ is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, railway signaling units, and smart metering systems requiring stable component supply across extended temperature and high-input-voltage conditions.
Supply support for MAX5090AATE/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 MAX5090AATE/V+ belongs to the MAXPower™ family of high-voltage DC-DC converters engineered for reliable, high-efficiency power conversion in automotive and industrial environments where input transients and wide temperature ranges are critical.
FAQ
What is the maximum input voltage rating for the MAX5090AATE/V+?
The MAX5090AATE/V+ has an absolute maximum input voltage rating of +80V, with guaranteed operation up to +76V. It is designed for automotive and industrial applications where battery rails may experience load-dump transients; sustained operation above 76V is not recommended per datasheet specifications.
Does the MAX5090AATE/V+ require external compensation components?
No, the MAX5090AATE/V+ features internal frequency compensation optimized for use with a 100µH inductor and 100µF output capacitor. This eliminates the need for external compensation networks, simplifying design and improving reliability across its operating range.
How does the ON/OFF pin function on the MAX5090AATE/V+?
The ON/OFF pin on the MAX5090AATE/V+ serves dual roles: it acts as a logic-level enable input (1.546V rising threshold) and supports external UVLO programming via a resistive divider from VIN. Pulling it low reduces supply current to 19µA, while connecting it to VIN enables automatic startup.
Can the MAX5090AATE/V+ be synchronized to an external clock?
Yes, the MAX5090AATE/V+ accepts an external synchronization signal on the SYNC pin within 119kHz–200kHz. When driven by a clean clock source, it locks its switching frequency to the external signal-reducing EMI interference in noise-sensitive systems such as data acquisition or RF modules.
What thermal performance can be expected from the MAX5090AATE/V+ in a 5mm × 5mm TQFN package?
In a standard JEDEC 51 multilayer board layout, the MAX5090AATE/V+ achieves a junction-to-ambient thermal resistance (θJA) of 30°C/W. With proper PCB copper pour and EP soldering, it safely dissipates 2.67W at +70°C ambient-supporting full 2A output under typical automotive and industrial thermal conditions.
MAX5090AATE/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 6.5V
- Voltage - Input (Max):
- 76V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 127kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX5090AATE/V+ FAQ
1.How can I place an order for MAX5090AATE/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5090AATE/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 MAX5090AATE/V+ reliable?
The price and inventory of MAX5090AATE/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5090AATE/V+ is usually 5 days.
3.What payment methods are accepted for MAX5090AATE/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5090AATE/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5090AATE/V+?
MAX5090AATE/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5090AATE/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 MAX5090AATE/V+?
For technical support, including MAX5090AATE/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5090AATE/V+ requirements.
6.How does Aetrix verify that MAX5090AATE/V+ is sourced from the original manufacturer or authorized distributors?
All MAX5090AATE/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 MAX5090AATE/V+ meets industry standards.
7.What is the process for return or replacement of MAX5090AATE/V+?
All MAX5090AATE/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5090AATE/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 MAX5090AATE/V+ part is unused and in its original packaging.
Return procedure for MAX5090AATE/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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