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Analog Devices Inc./Maxim Integrated MAX5090AATE+T
- Part No.:
- MAX5090AATE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5090AATE+T.pdf
- Description:
- IC REG BUCK 3.3V 2A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,596
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Product details
Overview
MAX5090AATE+T from Maxim Integrated is a high-efficiency, 76V-input synchronous step-down DC-DC converter with fixed 3.3V output, 2A load 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 (VIN = 12V), consumes only 310µA quiescent current at no load, and integrates frequency compensation for simplified design in industrial power supplies.
For engineers reviewing the MAX5090AATE+T datasheet, MAX5090AATE+T pinout, MAX5090AATE+T application, or MAX5090AATE+T equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and switching specifications, and real-world application guidance for high-voltage distributed power systems requiring stable 3.3V rails.
Technical Context
The MAX5090AATE+T implements voltage-mode PWM control with VIN feed-forward, enabling stable regulation across its 6.5V–76V input range. Its fixed 127kHz switching frequency (or external synchronization from 119kHz–200kHz) and automatic pulse-skipping mode maintain high light-load efficiency without external compensation components.
It integrates undervoltage lockout (6.17V rising threshold, 0.5V hysteresis), cycle-by-cycle current limiting (typ. 3.3A peak switch current), hiccup-mode short-circuit protection, and thermal shutdown at +175°C (20°C hysteresis). The internal 7.8V regulator (VD) powers gate drive and analog circuitry, supporting bootstrap operation via BST–LX capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.5V to 76V - supports wide-range industrial and automotive battery inputs without pre-regulation. |
| Output Voltage | Fixed 3.3V ±3% (3.20V–3.39V) - tightly regulated for MCU, FPGA, and interface IC supply rails. |
| Max Output Current | 2A continuous - sufficient for powering multiple digital loads or isolated gate drivers. |
| Switching Frequency | 127kHz fixed (or syncable 119–200kHz) - balances EMI, inductor size, and efficiency in noise-sensitive environments. |
| Quiescent Current | 310µA at no load - enables low-power standby modes in always-on systems. |
| Shutdown Current | 19µA (typ) - minimizes battery drain during system sleep states. |
| Internal High-Side RDS(on) | 0.26Ω - reduces conduction loss and improves full-load efficiency without external MOSFETs. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial ambient conditions. |
Pinout & Package
MAX5090AATE+T is housed in a 16-pin thin QFN package (5mm × 5mm) with exposed pad (EP) for thermal dissipation. The EP must be soldered to SGND plane; it is not a standalone ground connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 LX | Source of internal high-side DMOS switch | Connects to inductor node; carries high di/dt switching current - requires low-inductance layout. |
| 3 BST | Bootstrap capacitor terminal | Drives high-side gate via 0.22µF ceramic cap to LX; critical for proper high-side turn-on. |
| 4 VIN | Main input supply (6.5–76V) | Bypassed to SGND with low-ESR capacitor; withstands up to +80V transient. |
| 5 VD | Internally regulated 7.8V supply | Powers gate driver and analog circuitry; bypassed to PGND with ≥3.3µF ceramic cap. |
| 6 SYNC | External clock synchronization input | Accepts 119–200kHz square wave; ties to SGND for internal 127kHz operation. |
| 7 SS | Soft-start timing capacitor node | Controls startup ramp time; 0.047µF yields ~700µs default soft-start. |
| 8 FB | Feedback input (1.228V reference) | Connected directly to VOUT for fixed 3.3V version; sets regulation point. |
| 9 ON/OFF | Logic-controlled enable/shutdown | 1.546V rising threshold; drives to ground for <19µA shutdown current. |
| 10 SGND | Signal ground reference | Must be connected to PGND; separates analog return from power return. |
| 11, 15, 16 N.C. | No internal connection | Not bonded; leave unconnected or tie to SGND per layout best practice. |
| 12 PGND | Power ground return path | Carries high-current switch return; connects to PCB ground plane under EP. |
| 13, 14 DRAIN | Drain of internal high-side DMOS | Internally connected to LX; not user-accessible - serves structural role in die layout. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-voltage DMOS switch | 0.26Ω RDS(on) enables single-chip 76V-to-3.3V conversion without external MOSFETs or drivers. |
| Internal frequency compensation | Eliminates need for external compensation network - simplifies design and improves stability margin with recommended 100µH/100µF output filter. |
| Programmable soft-start | External capacitor on SS pin allows precise control of output ramp rate to prevent inrush current and downstream supply sequencing issues. |
| Robust protection suite | Includes UVLO (6.17V), cycle-by-cycle current limit (3.3A typ), hiccup-mode short-circuit response, and thermal shutdown (+175°C). |
| Low-noise synchronization | SYSCLK input accepts clean external clock (119–200kHz) to eliminate beat frequencies in multi-rail systems or meet EMI compliance targets. |
| Automotive temperature grade | Qualified from –40°C to +125°C junction temperature - suitable for engine control units, ADAS power modules, and industrial PLCs. |
Applications
| Industrial Power Supply | Distributed Battery Systems |
|---|---|
|
Use Scenario: Providing regulated 3.3V rail for programmable logic controllers (PLCs) operating from 24V or 48V DC bus in factory automation cabinets. IC Role / Device Role / Timing Role: Primary buck regulator delivering 2A continuous current with high line/load regulation (<±1.5% over 6.5–76V input). Use Value: Eliminates need for intermediate 12V stage; 92% efficiency at 1A reduces thermal load in sealed enclosures. |
Use Scenario: Powering telemetry and sensor nodes in 48V telecom or EV battery management systems where input may swing from 36V to 72V. IC Role / Device Role / Timing Role: High-input-voltage step-down converter with pulse-skipping mode maintaining >85% efficiency down to 10mA load. Use Value: 310µA quiescent current extends battery life in remote monitoring devices during extended sleep cycles. |
| Automotive Body Control Module | Ruggedized IoT Gateway |
|
Use Scenario: Generating 3.3V for microcontroller, CAN transceiver, and LIN interface in body electronics exposed to cold cranking (6.5V) and load dump (76V) events. IC Role / Device Role / Timing Role: Input-robust DC-DC with integrated UVLO hysteresis (0.5V) and thermal shutdown (+175°C) for fault resilience. Use Value: Withstands automotive transients without external TVS; 127kHz fixed frequency simplifies EMI filtering vs. variable-frequency alternatives. |
Use Scenario: Powering edge AI inference accelerators and wireless SoCs in outdoor infrastructure nodes powered by solar-charged 48V LiFePO₄ batteries. IC Role / Device Role / Timing Role: Primary power stage with SYNC input synchronized to system clock to avoid spectral interference with RF front-end. Use Value: External clock sync eliminates switching noise coupling into sub-GHz LoRaWAN or NB-IoT receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | 4.5–65V input, 3.3V fixed, 1A output, 500kHz switching, requires external compensation. | Lower max input voltage and output current; higher frequency increases EMI risk but reduces inductor size. | Prefer when board space is constrained and 1A suffices; avoid if 76V transients or 2A loads are present. |
| TPS54260DGQR | 3.5–60V input, adjustable output, 2.5A, 100kHz–2.5MHz sync-capable, external compensation required. | Wider frequency range but lacks integrated high-side FET RDS(on) spec; less efficient at 76V due to external MOSFET losses. | Choose when output voltage adjustability is mandatory and thermal budget allows discrete FET solution. |
Compared with LM5164QDDARQ1 and TPS54260DGQR, the MAX5090AATE+T offers superior 76V input tolerance, integrated 0.26Ω FET for higher efficiency at high VIN, and internal compensation - reducing BOM count and layout sensitivity in automotive and industrial designs.
Availability
MAX5090AATE+T is available at Aetrix Electronics and suitable for industrial power supplies, distributed battery systems, automotive body control modules, and ruggedized IoT gateways requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX5090AATE+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX5090AATE+T belongs to the MAXPower™ family of high-voltage DC-DC converters, designed specifically for robust, compact, and efficient power conversion in harsh environments where wide input range and automotive qualification are essential.
FAQ
What is the maximum input voltage rating for the MAX5090AATE+T?
The MAX5090AATE+T has an absolute maximum input voltage of +80V, with guaranteed operation from 6.5V to 76V. This makes it suitable for applications subject to automotive load dump or industrial 48V/72V bus transients. Operation beyond 76V is not specified in the electrical characteristics and may compromise reliability or regulation accuracy.
Does the MAX5090AATE+T require external compensation components?
No, the MAX5090AATE+T 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 stability margin without tuning. Deviations from the recommended LC values may require validation.
How does the MAX5090AATE+T handle thermal overload conditions?
The MAX5090AATE+T activates thermal shutdown at +175°C junction temperature, turning off the internal power MOSFET and entering hiccup mode. It automatically recovers when the die cools to +155°C. This protects against sustained overtemperature events while allowing safe restart once thermal conditions normalize - critical for unattended industrial deployments.
Can the MAX5090AATE+T be synchronized to an external clock?
Yes, the MAX5090AATE+T supports external synchronization via the SYNC pin, accepting clock signals from 119kHz to 200kHz. When an external clock is applied for four consecutive cycles, the device locks to it. This feature helps avoid beat frequencies in multi-converter systems and aids EMI compliance testing by fixing switching harmonics.
What is the purpose of the VD pin on the MAX5090AATE+T?
VD is the output of an internal 7.8V linear regulator that powers the gate driver and analog circuitry. It must be bypassed to PGND with a minimum 3.3µF ceramic capacitor. This dedicated supply ensures stable high-side gate drive independent of VIN fluctuations, enabling reliable operation across the full 6.5V–76V input range.
MAX5090AATE+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:
- 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+T FAQ
1.How can I place an order for MAX5090AATE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5090AATE+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+T reliable?
The price and inventory of MAX5090AATE+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+T is usually 5 days.
3.What payment methods are accepted for MAX5090AATE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5090AATE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5090AATE+T?
MAX5090AATE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5090AATE+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+T?
For technical support, including MAX5090AATE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5090AATE+T requirements.
6.How does Aetrix verify that MAX5090AATE+T is sourced from the original manufacturer or authorized distributors?
All MAX5090AATE+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+T meets industry standards.
7.What is the process for return or replacement of MAX5090AATE+T?
All MAX5090AATE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5090AATE+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+T part is unused and in its original packaging.
Return procedure for MAX5090AATE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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