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Analog Devices Inc./Maxim Integrated MAX5090CATE/V+T
- Part No.:
- MAX5090CATE/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5090CATE/V+T.pdf
- Description:
- IC REG BUCK ADJ 2A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,229
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Product details
Overview
MAX5090CATE/V+T from Maxim Integrated is a high-efficiency, 2A, 76V-input adjustable-output synchronous step-down DC-DC converter with internal 0.26Ω high-side DMOS FET, fixed 127kHz PWM operation (or external synchronization), and automotive-grade -40°C to +125°C operation in a 16-pin 5mm × 5mm TQFN package. It delivers 1.265V–11V output voltage with 1.228V feedback reference, 310µA no-load quiescent current, and integrated thermal shutdown, hiccup-mode short-circuit protection, and undervoltage lockout - used in industrial distributed power supplies.
For engineers reviewing the MAX5090CATE/V+T datasheet, MAX5090CATE/V+T pinout, MAX5090CATE/V+T application, or MAX5090CATE/V+T equivalent, key selection criteria include input voltage range (6.5V–76V), adjustable output capability (1.265V–11V), 2A continuous output, thermal performance (θJA = 30°C/W), and functional compatibility with MAX5090A/B variants for system-level power architecture reuse.
Technical Context
The MAX5090CATE/V+T implements a voltage-mode control architecture with VIN feed-forward, enabling stable regulation across wide input ranges without external compensation. Its internal 0.26Ω high-side DMOS switch and integrated gate driver (BST/LX bootstrap circuit) eliminate external MOSFETs and reduce BOM count.
It supports dual operating modes: fixed-frequency PWM at 127kHz (typ) under heavy load and automatic pulse-skipping mode at light loads to maintain >88% efficiency at 1A while consuming only 310µA quiescent current. Synchronization via SYNC pin allows noise-sensitive systems to align switching with external clocks (119–200kHz).
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 Range | 1.265V to 11V (adjustable) - set via external resistor divider on FB pin; VFB = 1.228V (typ) provides precise regulation tolerance. |
| Continuous Output Current | 2A - sustained delivery with thermal derating; peak switch current limit = 3.3A (typ) ensures robust transient handling. |
| Switching Frequency | Fixed 127kHz (internal) or 119–200kHz (external sync) - enables EMI control and predictable filter design. |
| Quiescent Current | 310µA (typ) at no load - minimizes standby power loss in always-on industrial monitoring systems. |
| Shutdown Current | 19µA (typ) at VIN = 14V - enables ultra-low-power system-level sleep modes. |
| Thermal Protection | Thermal shutdown at TJ = +175°C with 20°C hysteresis - prevents permanent damage during overload or poor heatsinking. |
Pinout & Package
Package: 16-pin thin QFN (5mm × 5mm, exposed pad), JEDEC-compliant, RoHS-compliant, rated for 2.67W dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX (Pins 1,2) | Switch node connection | Drives external inductor; connects to BST capacitor for high-side gate drive; must be routed with low-inductance layout. |
| BST (Pin 3) | Bootstrap supply | Connects 0.22µF ceramic capacitor to LX; supplies gate voltage for internal high-side DMOS FET. |
| VIN (Pin 4) | Main input supply | Accepts 6.5V–76V; requires local low-ESR bypass capacitor (e.g., 68µF aluminum + 0.47µF ceramic) near pin. |
| VD (Pin 5) | Internal LDO output | Provides regulated ~7.8V supply for internal analog/digital blocks; bypass with 3.3µF/10V ceramic to PGND. |
| SYNC (Pin 6) | Frequency synchronization input | Pull to SGND for internal 127kHz; apply external clock (119–200kHz) for EMI reduction in noise-sensitive applications. |
| SS (Pin 7) | Soft-start timing control | Connect external capacitor to SGND to program soft-start time (>700µs); default internal soft-start = 700µs. |
| FB (Pin 8) | Feedback input | Senses output via resistive divider; regulates to 1.228V reference; max bias current ±150nA ensures accuracy. |
| ON/OFF (Pin 9) | Enable/shutdown control | Logic-high (>1.38V) enables operation; logic-low disables converter and reduces VIN current to 19µA. |
| SGND (Pin 10) | Signal ground reference | Must be connected to PGND; serves as reference for FB, SS, SYNC, ON/OFF, and internal error amplifier. |
| PGND (Pin 12) | Power ground return | Primary return path for high-current LX switching loop; connect exposed pad (EP) to this plane for thermal conduction. |
| DRAIN (Pins 13,14) | High-side switch drain | Internally connected to LX; not user-accessible; forms part of integrated power stage. |
| N.C. (Pins 11,15,16) | No connection | Not bonded internally; leave unconnected and unpopulated on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side DMOS FET | RDS(ON) = 0.26Ω (typ) eliminates need for external high-voltage MOSFET and reduces board area and component count. |
| Internal frequency compensation | Enables stable closed-loop operation with standard 100µH inductor and 100µF output capacitor - no external compensation network required. |
| Programmable soft-start | External capacitor on SS pin sets startup ramp time; prevents input surge current and output overshoot during power-up or wake-up events. |
| Hiccup-mode short-circuit protection | Automatically cycles on/off during sustained output short, limiting average power dissipation and preventing thermal runaway. |
| Wide temperature operation | -40°C to +125°C junction range qualifies for under-hood automotive and industrial control cabinet deployments. |
Applications
| Industrial PLC Power Supply | Distributed Telecom Power |
|---|---|
Use Scenario: Providing isolated 5V/2A auxiliary rail for I/O modules in programmable logic controllers operating from 24V or 48V backplane. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering tightly regulated output with <±1.5% line/load regulation over full temperature range. Use Value: Enables compact, high-reliability power stage with no external MOSFET or compensation components - reducing bill-of-materials and qualification effort. | Use Scenario: Generating 3.3V/2A for baseband processor and FPGA in remote radio units powered by 48V telecom rectifiers. IC Role / Device Role / Timing Role: High-efficiency, noise-controlled DC-DC converter synchronized to system clock to avoid beat frequencies in sensitive RF front-end circuits. Use Value: Achieves >88% efficiency at 1A load while meeting EMI requirements via SYNC pin alignment - eliminating need for additional filtering. |
| Automotive Body Control Module | Factory Automation Sensor Hub |
Use Scenario: Powering microcontroller, CAN transceiver, and LED drivers in body control units supplied from 12V battery with cold-crank down to 6.5V. IC Role / Device Role / Timing Role: Input-robust buck converter with UVLO hysteresis (0.5V) and thermal shutdown, ensuring reliable start-up and fault recovery during cranking. Use Value: Maintains regulation during 6.5V–76V transients without external supervision circuitry - simplifying compliance with ISO 16750-2. | Use Scenario: Supplying 12V/2A to multiple analog sensor signal chains and ADCs in modular industrial sensor nodes with 24V fieldbus input. IC Role / Device Role / Timing Role: Adjustable-output buck converter configured for 12V output using R3/R4 feedback divider, supporting flexible system-level voltage planning. Use Value: Eliminates need for separate 12V LDO or secondary converter - improving overall system efficiency and reducing thermal footprint. |
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, 1.5A output, 1MHz switching, requires external MOSFETs and compensation | Higher frequency enables smaller magnetics but increases EMI risk; lacks integrated high-side FET and internal compensation | Choose when higher switching frequency and design flexibility outweigh integration benefits of MAX5090CATE/V+T |
| TPS54260DGQR | 3.5V–60V input, 2.5A output, 100kHz–2.5MHz adjustable frequency, integrated FET, no internal compensation | Wider frequency range and higher current rating, but requires full Type II/III compensation network and external soft-start | Prefer when system demands programmable frequency or >2A output, and designer has compensation design expertise |
Compared with LM5164QPWPRQ1 and TPS54260DGQR, the MAX5090CATE/V+T offers superior integration (internal 0.26Ω FET + full compensation), lower quiescent current (310µA vs. ≥500µA), and guaranteed automotive temperature support (-40°C to +125°C), making it optimal for space-constrained, thermally demanding industrial and automotive applications where BOM reduction and design simplicity are critical.
Availability
MAX5090CATE/V+T is available at Aetrix Electronics and suitable for industrial PLC power supplies, distributed telecom power systems, and automotive body control modules requiring stable component supply with automotive-grade reliability and long-term lifecycle support.
Supply support for MAX5090CATE/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 MAX5090 product line delivers high-voltage, high-efficiency step-down converters targeting harsh-environment applications where wide input range, integrated power stages, and extended temperature operation are essential - such as factory automation, vehicle electrification, and outdoor telecom infrastructure.
FAQ
What is the output voltage adjustment range supported by the MAX5090CATE/V+T?
The MAX5090CATE/V+T supports an adjustable output voltage range of 1.265V to 11V, set using an external resistor divider connected to the FB pin. The internal feedback reference voltage is precisely 1.228V (typ), enabling accurate regulation across the full range. This makes the MAX5090CATE/V+T suitable for custom voltage rails in industrial and automotive systems where fixed-output variants (e.g., MAX5090A/B) do not match target requirements.
How does the MAX5090CATE/V+T achieve high efficiency at light loads?
The MAX5090CATE/V+T achieves high efficiency at light loads by automatically entering pulse-skipping mode, which reduces switching activity and lowers quiescent current to 310µA (typ) at no load. Unlike forced-PWM operation, this mode dynamically skips switching cycles while maintaining regulation, minimizing gate-drive and core losses. The device transitions seamlessly between PWM and pulse-skipping based on output current, sustaining >80% efficiency even below 100mA load.
Can the MAX5090CATE/V+T be synchronized to an external clock, and what is the valid frequency range?
Yes, the MAX5090CATE/V+T can be synchronized to an external clock applied to the SYNC pin, with a guaranteed operational range of 119kHz to 200kHz. When SYNC is pulled to SGND, the device defaults to its internal 127kHz oscillator. External synchronization helps suppress beat frequencies in noise-sensitive applications like telecom base stations or audio subsystems, and the 350ns minimum pulse-width requirement ensures robust clock edge detection.
What thermal protection features does the MAX5090CATE/V+T include, and how do they behave?
The MAX5090CATE/V+T includes thermal shutdown at +175°C (rising threshold) with 20°C hysteresis, causing the device to cycle into hiccup mode under sustained overload. Once the junction cools to +155°C, the controller resumes operation. This protects against permanent damage during poor heatsinking or ambient overtemperature. Additionally, the device's θJA of 30°C/W (JEDEC 51 multilayer board) and exposed-pad thermal design enable 2.67W dissipation at +70°C ambient - verified per datasheet test conditions.
Is the MAX5090CATE/V+T pin-compatible with other members of the MAX5090 family, such as MAX5090AATE+ or MAX5090BATE+?
Yes, the MAX5090CATE/V+T is fully pin-compatible with MAX5090AATE+ and MAX5090BATE+, sharing identical 16-pin TQFN-EP packaging, pinout, and footprint. All variants use the same LX/BST/VIN/PGND/SGND/SYNC/SS/FB/ON/OFF interface and support identical external component values (e.g., 100µH inductor, 100µF output capacitor). This allows direct substitution in existing layouts when changing from fixed 3.3V/5V outputs to adjustable output configurations - provided feedback divider and soft-start capacitor are updated accordingly.
MAX5090CATE/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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 6.5V
- Voltage - Input (Max):
- 76V
- Voltage - Output (Min/Fixed):
- 1.228V
- Voltage - Output (Max):
- 11V
- 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)
MAX5090CATE/V+T FAQ
1.How can I place an order for MAX5090CATE/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5090CATE/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 MAX5090CATE/V+T reliable?
The price and inventory of MAX5090CATE/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 MAX5090CATE/V+T is usually 5 days.
3.What payment methods are accepted for MAX5090CATE/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5090CATE/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5090CATE/V+T?
MAX5090CATE/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5090CATE/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 MAX5090CATE/V+T?
For technical support, including MAX5090CATE/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5090CATE/V+T requirements.
6.How does Aetrix verify that MAX5090CATE/V+T is sourced from the original manufacturer or authorized distributors?
All MAX5090CATE/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 MAX5090CATE/V+T meets industry standards.
7.What is the process for return or replacement of MAX5090CATE/V+T?
All MAX5090CATE/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5090CATE/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 MAX5090CATE/V+T part is unused and in its original packaging.
Return procedure for MAX5090CATE/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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