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Analog Devices Inc./Maxim Integrated MAX5090AATE/V+T
- Part No.:
- MAX5090AATE/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5090AATE/V+T.pdf
- Description:
- IC REG BUCK 3.3V 2A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,913
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Product details
Overview
MAX5090AATE/V+T from Maxim Integrated is a high-efficiency, 76V-input synchronous step-down DC-DC converter with fixed 3.3V output, 2A capability, internal 0.26Ω high-side DMOS FET, and automotive-grade operation from −40°C to +125°C. It delivers up to 92% efficiency at 1A load (VIN = 12V), consumes only 310µA quiescent current at no load, and integrates frequency compensation for simplified design in industrial power supplies and distributed power systems.
For engineers reviewing the MAX5090AATE/V+T datasheet, MAX5090AATE/V+T pinout, MAX5090AATE/V+T application, or MAX5090AATE/V+T equivalent, key selection considerations include its 6.5V–76V input range, 3.3V/2A fixed-output capability, thermal shutdown at +175°C, external synchronization support (119–200kHz), and TQFN-EP package compatibility with high-power-density PCB layouts.
Technical Context
The MAX5090AATE/V+T implements voltage-mode PWM control with VIN feed-forward, enabling stable regulation across wide input variations. Its internal 127kHz oscillator operates in fixed-frequency mode or synchronizes externally, while pulse-skipping mode maintains high light-load efficiency without external circuitry.
It integrates undervoltage lockout (6.17V rising threshold, 0.5V hysteresis), cycle-by-cycle current limiting (2.4–5.0A), hiccup-mode short-circuit protection, and thermal shutdown (+175°C trip, +155°C recovery). The device uses an internal low-dropout regulator (VD = 7.0–8.4V) to power gate drive and analog circuitry, eliminating need for auxiliary bias rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.5V to 76V - supports wide industrial and automotive battery inputs including 12V, 24V, 48V, and 72V nominal systems. |
| Output Voltage | Fixed 3.3V ±3% (3.20V–3.39V) - tightly regulated for powering microcontrollers, sensors, and logic interfaces without external feedback resistors. |
| Max Output Current | 2A continuous - sufficient for powering multiple SoCs or FPGA I/O banks in compact embedded systems. |
| Quiescent Current | 310µA typical at no load - enables always-on functionality in battery-backed or energy-sensitive applications. |
| Switching Frequency | Fixed 127kHz (±21kHz) - balances EMI, inductor size, and efficiency; supports external sync from 119kHz to 200kHz for noise-sensitive timing domains. |
| Thermal Shutdown | +175°C junction trip with +20°C hysteresis - provides robust overtemperature protection during sustained overload or poor heatsinking. |
| Package | 16-pin TQFN-EP (5mm × 5mm, 0.8mm height) - exposes thermal pad for direct PCB copper connection, enabling 2.67W dissipation at +70°C ambient. |
Pinout & Package
The MAX5090AATE/V+T is housed in a 16-pin thin QFN with exposed thermal pad (TQFN-EP), optimized for thermal performance and space-constrained designs. Pin 1 is located at the bottom-left corner of the top view, with EP soldered to SGND/PGND plane for heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX (Pins 1,2) | Switch node | Connects to inductor and Schottky diode cathode; carries high dv/dt switching waveform - requires tight layout and ground shielding. |
| BST (Pin 3) | Bootstrap supply | Drives high-side FET gate via 0.22µF ceramic capacitor to LX; must be placed adjacent to IC for minimal loop inductance. |
| VIN (Pin 4) | Main input supply | Accepts 6.5V–76V; bypassed with ≥68µF low-ESR capacitor near pin to suppress ripple and EMI. |
| VD (Pin 5) | Internal LDO output | Provides ~7.8V regulated supply for gate driver and analog circuits; bypassed with 3.3µF ceramic capacitor to PGND. |
| SYNC (Pin 6) | Frequency sync input | Accepts external clock (119–200kHz); tie to SGND for internal 127kHz operation - enables deterministic EMI reduction. |
| SS (Pin 7) | Soft-start control | External capacitor sets startup ramp time; default internal soft-start is 700µs - prevents inrush current into large output capacitors. |
| FB (Pin 8) | Feedback reference | Internally connected to VOUT for fixed 3.3V version; senses output voltage and closes regulation loop via internal error amplifier. |
| ON/OFF (Pin 9) | Enable/shutdown control | Logic-level input (1.546V max rising threshold); pull low for <19µA shutdown current - supports system-level power sequencing. |
| SGND (Pin 10) | Signal ground | Reference for FB, SS, SYNC, ON/OFF; must be tied to PGND at single point to avoid ground bounce in high-current paths. |
| PGND (Pin 12) | Power ground | Return path for high-current LX switching and internal FET - connects directly to thermal pad and bulk input/output capacitors. |
| DRAIN (Pins 13,14) | High-side FET drain | Internally connected to LX; not user-accessible - confirms integrated switch architecture and eliminates external MOSFET requirement. |
| N.C. (Pins 11,15,16) | No connection | Not bonded or functional - leave unconnected and unrouted to avoid parasitic coupling or accidental shorts. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.26Ω high-side DMOS FET | Reduces BOM count and layout complexity while maintaining >92% peak efficiency - eliminates need for external high-voltage MOSFET and driver. |
| Internal frequency compensation | Enables stable operation with standard 100µH inductor and 100µF output capacitor - removes requirement for external compensation network tuning. |
| Pulse-skipping light-load mode | Maintains >80% efficiency at 10mA load (VIN=12V) - extends battery life in standby or sensor-wake modes without audible inductor whine. |
| External clock synchronization | Aligns switching edges to system clock domain (119–200kHz) - simplifies EMI filtering and avoids beat frequencies in multi-rail power systems. |
| Automotive temperature range | Guaranteed operation from −40°C to +125°C junction - qualified for under-hood and industrial control cabinet deployments without derating. |
Applications
| Industrial PLC Power Supply | Distributed Battery Backup System |
|---|---|
Use Scenario: Providing isolated 3.3V rail for programmable logic controller (PLC) CPU and I/O modules operating from 24V or 48V DC bus. IC Role / Device Role / Timing Role: Primary buck regulator delivering clean, regulated 3.3V/2A output with fast transient response to handle burst I/O activity. Use Value: High input voltage range accommodates brownout conditions; 310µA quiescent current minimizes standby drain on backup batteries. | Use Scenario: Powering telemetry and communication modules in telecom remote radio units powered by 48V battery banks. IC Role / Device Role / Timing Role: Main step-down converter converting 48V battery to 3.3V for MCU, RF transceiver, and memory subsystems. Use Value: 76V absolute maximum rating ensures survival during load-dump transients; thermal shutdown protects against prolonged overloads in sealed enclosures. |
| Automotive Body Control Module | Railway Signaling Interface |
Use Scenario: Generating 3.3V supply for CAN/LIN transceivers and microcontrollers in vehicle door modules or lighting controllers. IC Role / Device Role / Timing Role: Compact, high-reliability DC-DC stage meeting AEC-Q100 requirements for automotive electronics. Use Value: −40°C to +125°C operation supports full vehicle temperature range; 19µA shutdown current enables ultra-low-power sleep states. | Use Scenario: Converting 72V traction battery or 110V DC signaling rail to 3.3V for train control logic and safety-critical monitoring sensors. IC Role / Device Role / Timing Role: Robust primary converter handling high-voltage transients and long-term reliability demands of railway infrastructure. Use Value: 0.26Ω RDS(ON) and integrated thermal protection ensure stable operation under sustained 72V input with minimal derating. |
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 fixed, 1A output, 1.5MHz switching, requires external compensation | Higher frequency enables smaller magnetics but lower current rating and no integrated sync capability | Select when board space is critical and 1A output suffices; verify loop stability with external compensation network. |
| TPS54260DGQR | 3.5V–60V input, adjustable output, 2.5A, 100kHz–2.5MHz sync range, external FET drive | Requires external high-side MOSFET and gate driver; wider sync range but higher component count | Choose when adjustable output or higher than 2A current is needed; accept added complexity for flexibility. |
Compared with LM5164QPWPRQ1 and TPS54260DGQR, the MAX5090AATE/V+T offers higher input voltage tolerance (76V vs. ≤65V), integrated 2A switch with lower RDS(ON), and simpler implementation due to internal compensation - making it optimal for fixed 3.3V, high-reliability industrial and automotive applications where input voltage margin and design simplicity are prioritized.
Availability
MAX5090AATE/V+T is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive body control modules, distributed battery backup systems, and railway signaling interfaces requiring stable component supply across extended temperature and high-input-voltage conditions.
Supply support for MAX5090AATE/V+T 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 industrial, automotive, communications, and computing markets.
The MAX5090AATE/V+T belongs to the MAXPower™ family of high-voltage DC-DC converters engineered for rugged, high-efficiency power conversion in harsh environments - specifically targeting applications needing wide VIN, integrated FETs, and automotive-grade reliability without external compensation.
FAQ
What is the maximum input voltage rating for the MAX5090AATE/V+T?
The MAX5090AATE/V+T has an absolute maximum input voltage rating of +80V, with guaranteed operation across 6.5V to 76V. This allows reliable use in 48V and 72V industrial and automotive systems, including scenarios with load-dump transients up to 76V. Operation beyond 76V is not specified and may compromise reliability or safety margins.
Does the MAX5090AATE/V+T require external compensation components?
No, the MAX5090AATE/V+T features internal frequency compensation optimized for standard 100µH inductors and 100µF output capacitors. This eliminates the need for external Type II or Type III compensation networks, reducing design time and component count while ensuring stable loop response across temperature and load conditions.
How does the MAX5090AATE/V+T manage thermal performance in confined spaces?
The MAX5090AATE/V+T uses a 16-pin TQFN-EP package with an exposed thermal pad soldered to a dedicated SGND/PGND copper plane. At +70°C ambient, it can dissipate 2.67W continuously; thermal resistance θJA is 30°C/W per JEDEC 51. For higher ambient temperatures, derating follows 33.3mW/°C above +70°C, and thermal shutdown activates at +175°C junction temperature.
Can the MAX5090AATE/V+T be synchronized to an external clock, and what is the supported frequency range?
Yes, the MAX5090AATE/V+T supports external synchronization via the SYNC pin. When driven with a clean square wave, it locks to frequencies between 119kHz and 200kHz. The internal oscillator defaults to 127kHz when SYNC is tied to SGND. Minimum pulse width is 350ns; shorter pulses may be ignored due to noise rejection.
What is the shutdown current consumption of the MAX5090AATE/V+T, and how is it controlled?
The MAX5090AATE/V+T draws 19µA typical shutdown current when the ON/OFF pin is pulled low. This pin accepts logic-level control across the full VIN range (up to 76V), with a rising threshold of 1.546V (max) and 100mV hysteresis. Pulling ON/OFF to ground disables the internal FET, turns off all bias circuitry, and places the device in ultra-low-power state.
MAX5090AATE/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX5090AATE/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5090AATE/V+T 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+T reliable?
The price and inventory of MAX5090AATE/V+T 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+T is usually 5 days.
3.What payment methods are accepted for MAX5090AATE/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5090AATE/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5090AATE/V+T?
MAX5090AATE/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5090AATE/V+T 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+T?
For technical support, including MAX5090AATE/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5090AATE/V+T requirements.
6.How does Aetrix verify that MAX5090AATE/V+T is sourced from the original manufacturer or authorized distributors?
All MAX5090AATE/V+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX5090AATE/V+T?
All MAX5090AATE/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5090AATE/V+T, 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+T part is unused and in its original packaging.
Return procedure for MAX5090AATE/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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