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Analog Devices Inc./Maxim Integrated MAX5090AATE+
- Part No.:
- MAX5090AATE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5090AATE+.pdf
- Description:
- IC REG BUCK 3.3V 2A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:284
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Product details
Overview
MAX5090AATE+ from Maxim Integrated is a high-efficiency, 76V-input synchronous step-down DC-DC converter with fixed 3.3V output, delivering up to 2A continuous current. It features internal 0.26Ω high-side DMOS FET, 127kHz fixed-frequency PWM operation, and pulse-skipping mode for light-load efficiency. Designed for automotive power systems, it operates across –40°C to +125°C in a 16-pin TQFN-EP (5mm × 5mm) package.
For engineers reviewing the MAX5090AATE+ datasheet, MAX5090AATE+ pinout, MAX5090AATE+ application, or MAX5090AATE+ equivalent, this page delivers verified technical context, real-world design meaning for each specification, validated pin functions, automotive-grade thermal behavior, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MAX5090AATE+ implements voltage-mode control with VIN feed-forward and internal compensation, enabling stable regulation across 6.5V–76V input while maintaining ≤±3% output accuracy over temperature and load. Its integrated high-side DMOS switch and bootstrap gate drive (BST–LX) eliminate external driver complexity.
It supports external synchronization (119–200kHz), programmable soft-start via SS pin, and robust protection including cycle-by-cycle current limit (2.4–5.0A), hiccup-mode short-circuit response, and thermal shutdown at +175°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.5V to 76V - supports wide industrial and automotive battery rails including 12V, 24V, 48V, and 72V systems without pre-regulation. |
| Output Voltage | Fixed 3.3V ±3% - tightly regulated for powering microcontrollers, sensors, and CAN transceivers directly from high-voltage bus. |
| Max Output Current | 2A continuous - sufficient for powering multiple low-power subsystems (e.g., ADAS camera modules, body control units) from single IC. |
| Quiescent Current | 310µA at no load - enables always-on functionality in vehicle infotainment or telematics without excessive battery drain. |
| Switching Frequency | 127kHz fixed (or sync-capable 119–200kHz) - balances EMI control, inductor size, and efficiency; avoids AM radio band interference. |
| Thermal Shutdown | +175°C junction trip with +155°C recovery - provides fail-safe thermal cycling under sustained overload or poor PCB heatsinking. |
| Package | 16-pin TQFN-EP (5mm × 5mm, 0.5mm pitch) - exposed pad enables ≥2.67W power dissipation at +70°C ambient on standard 4-layer board. |
Pinout & Package
MAX5090AATE+ uses a 16-pin thin quad flat no-lead package with exposed thermal pad (TQFN-EP, 5mm × 5mm, 0.5mm pitch). The EP must be soldered to SGND plane for thermal performance and electrical reference integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 - LX | Switch node | Source connection of internal high-side DMOS; ties to inductor and bootstrap capacitor (BST–LX); carries high di/dt switching current. |
| 3 - BST | Bootstrap supply | Provides gate-drive voltage for high-side FET; requires 0.22µF ceramic cap to LX; critical for reliable 100% duty-cycle capability. |
| 4 - VIN | Main input supply | Accepts 6.5V–76V; must be bypassed with low-ESR capacitor near pin; absolute max = +80V. |
| 5 - VD | Internal LDO output | 7.8V regulated supply for analog circuitry; bypass with ≥3.3µF ceramic cap to PGND; powers internal oscillator and error amp. |
| 6 - SYNC | Frequency sync input | Accepts external clock (119–200kHz); tie to SGND for internal 127kHz operation; enables EMI reduction via system-level clock alignment. |
| 7 - SS | Soft-start timing | Controls startup ramp time via external capacitor; default internal soft-start = 700µs; prevents inrush into large output capacitors. |
| 8 - FB | Feedback sense | Connects directly to VOUT for fixed 3.3V version; internal reference = 1.228V; sets output accuracy and loop stability. |
| 9 - ON/OFF | Enable/shutdown control | Logic-level input (1.546V rising threshold); pull low for <20µA shutdown current; connect to VIN for automatic startup. |
| 10 - SGND | Signal ground | Reference for FB, SS, SYNC, ON/OFF; must be connected to PGND; separates noise-sensitive analog paths from power return. |
| 11, 15, 16 - N.C. | No connection | Not internally bonded; leave unconnected; no routing or copper fill required. |
| 12 - PGND | Power ground | Main return path for high-current LX and DRAIN paths; connects to PCB ground plane under EP; minimizes switching noise coupling. |
| 13, 14 - DRAIN | High-side FET drain | Internally tied to LX; serves as secondary switch node connection point; used for Kelvin sensing or layout optimization in high-current designs. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.26Ω high-side DMOS | Reduces external component count and conduction losses; enables >90% peak efficiency at 12VIN/3.3VOUT/1A without external MOSFETs. |
| Pulse-skipping light-load mode | Maintains >80% efficiency at 10mA load by reducing switching frequency; eliminates audible coil whine and extends battery life in standby. |
| Internal frequency compensation | Eliminates need for external compensation network; guarantees stability with recommended 100µH inductor and 100µF/50mΩ output capacitor. |
| Undervoltage lockout (UVLO) | 6.17V turn-on threshold with 0.5V hysteresis; prevents erratic startup during cold cranking or brownout conditions in automotive environments. |
| Hiccup-mode short-circuit protection | Shuts down for ~10ms after overcurrent detection, then retries; limits average power dissipation during sustained output fault without latch-off. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Supply |
|---|---|
|
Use Scenario: Powering microcontroller, CAN transceiver, and sensor interface circuitry in door module or seat controller. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator sourcing 1.5A continuous from 12V battery rail with cold-crank tolerance down to 6.5V. Use Value: Eliminates need for external high-voltage pre-regulator; 310µA quiescent current meets ISO 16750-2 sleep-mode requirements. |
Use Scenario: Generating isolated 3.3V logic supply for digital I/O expansion cards in modular PLC backplane. IC Role / Device Role / Timing Role: Non-isolated 3.3V/2A point-of-load converter fed from 24V DC field bus; synchronized to PLC master clock via SYNC pin. Use Value: Fixed 127kHz operation avoids EMI overlap with 24V bus noise; TQFN-EP package fits tight 1U chassis spacing. |
| Railway Onboard Telematics Unit | Commercial Vehicle ADAS Camera Power |
|
Use Scenario: Providing clean 3.3V supply to GPS/GNSS receiver and cellular modem in train-mounted data logger. IC Role / Device Role / Timing Role: Input-filtered buck converter accepting 72V nominal railway supply (range: 40–110V transient tolerant via external TVS). Use Value: 76V max input rating allows direct connection to 72V rail without derating; -40°C to +125°C operation covers under-hood and under-floor mounting. |
Use Scenario: Powering image sensor and ISP in front-facing ADAS camera mounted behind windshield. IC Role / Device Role / Timing Role: Compact 3.3V/2A supply with soft-start (SS pin) limiting inrush into 100µF output cap during vehicle ignition sequence. Use Value: Internal soft-start and 700µs default ramp prevent voltage droop on shared 12V battery bus during camera boot-up. |
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, 3.3V adjustable via feedback resistors; requires external high-side MOSFET and compensation; 1.5A max output. | Requires more external components and layout effort; better suited for designs needing >65V input headroom or custom output voltages. | Select LM5164QPWPRQ1 only if input exceeds 76V or adjustable output is mandatory; MAX5090AATE+ offers lower BOM count and guaranteed 2A capability. |
| TPS54260DGQR | 3.5V–60V input, 3.3V fixed option available; 2.5A max output; requires external compensation; 3.5µA shutdown current. | Lower max input voltage limits use in 72V rail systems; higher output current margin but larger SOIC-8 package increases board area. | Choose TPS54260DGQR when 2.5A headroom is critical and input stays ≤60V; MAX5090AATE+ provides superior thermal performance in space-constrained automotive layouts. |
Compared with LM5164QPWPRQ1 and TPS54260DGQR, the MAX5090AATE+ delivers higher input voltage tolerance (76V vs. ≤65V), integrated FET architecture reducing bill-of-materials, and automotive-qualified thermal performance in a compact TQFN-EP package-making it optimal for next-generation vehicle electronics where space, reliability, and wide-input operation are prioritized.
Availability
MAX5090AATE+ is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC power supplies, railway telematics units, and commercial vehicle ADAS camera systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX5090AATE+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX5090AATE+ belongs to the MAXPower™ family of high-voltage DC-DC converters, engineered specifically for automotive and industrial environments where wide-input operation, high efficiency at light loads, and robust fault protection are essential.
FAQ
What is the maximum input voltage supported by the MAX5090AATE+?
The MAX5090AATE+ supports a maximum input voltage of 76V, with absolute maximum rating of +80V on the VIN pin. This enables direct connection to 48V and 72V industrial and automotive battery systems without external pre-regulation. Operation above 76V violates specifications and may cause permanent damage.
Does the MAX5090AATE+ require external compensation components?
No, the MAX5090AATE+ features internal frequency compensation optimized for use with a 100µH inductor and 100µF output capacitor with 20–100mΩ ESR. External compensation is not required, simplifying design and improving production consistency compared to controllers requiring external Type II or III networks.
How does the MAX5090AATE+ handle thermal overload conditions?
The MAX5090AATE+ activates thermal shutdown at +175°C junction temperature and recovers at +155°C, entering hiccup-mode pulsing until cooling occurs. This protects against sustained overloads without latch-off, allowing safe auto-recovery in ventilated enclosures. Continuous operation above +150°C junction is not recommended per datasheet limits.
Can the MAX5090AATE+ be synchronized to an external clock?
Yes, the MAX5090AATE+ accepts external synchronization via the SYNC pin across 119kHz–200kHz. When an external clock meeting minimum pulse-width (350ns) and voltage thresholds is applied for four cycles, the device switches from its internal 127kHz oscillator to the external source-enabling EMI reduction in noise-sensitive systems like infotainment or radar modules.
What is the shutdown current consumption of the MAX5090AATE+?
The MAX5090AATE+ draws 19µA typical shutdown current at VIN = 14V, with a maximum of 45µA over temperature. This ultra-low shutdown current supports battery-backed always-on functions in automotive telematics and remote monitoring devices where multi-year standby life is required.
MAX5090AATE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX5090AATE+ FAQ
1.How can I place an order for MAX5090AATE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5090AATE+ 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+ reliable?
The price and inventory of MAX5090AATE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5090AATE+ is usually 5 days.
3.What payment methods are accepted for MAX5090AATE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5090AATE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5090AATE+?
MAX5090AATE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5090AATE+ 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+?
For technical support, including MAX5090AATE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5090AATE+ requirements.
6.How does Aetrix verify that MAX5090AATE+ is sourced from the original manufacturer or authorized distributors?
All MAX5090AATE+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX5090AATE+?
All MAX5090AATE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5090AATE+, 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+ part is unused and in its original packaging.
Return procedure for MAX5090AATE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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