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Analog Devices Inc./Maxim Integrated MAX5090CATE
- Part No.:
- MAX5090CATE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5090CATE.pdf
- Description:
- IC REG BUCK ADJ 2A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,054
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Product details
Overview
MAX5090CATE from Maxim Integrated is a high-efficiency, 2A, adjustable-output synchronous step-down DC-DC converter operating from 6.5V to 76V input, featuring internal 0.26Ω high-side DMOS FET, 127kHz fixed-frequency PWM with external synchronization capability, and 310µA no-load quiescent current. It delivers regulated output from 1.265V to 11V in automotive-grade (-40°C to +125°C) operation for industrial power supplies and distributed power architectures.
For engineers reviewing the MAX5090CATE datasheet, MAX5090CATE pinout, MAX5090CATE application, or MAX5090CATE equivalent, key selection criteria include its wide-input voltage range, adjustable feedback architecture (1.228V reference), thermal shutdown at +175°C, 16-pin TQFN-EP package with exposed pad, and compatibility with external soft-start capacitor (CSS) for controlled startup sequencing.
Technical Context
The MAX5090CATE implements voltage-mode control with VIN feed-forward and internal frequency compensation optimized for 100µH inductors and 100µF/50mΩ ESR output capacitors. Its architecture integrates a high-voltage DMOS switch, bootstrap gate drive (BST–LX), and programmable soft-start via SS pin with 4.5–16µA charge current.
It supports pulse-skipping mode at light loads to maintain high efficiency down to µA-level load currents, while enabling noise-sensitive system-level clock synchronization via SYNC pin (119–200kHz range). Undervoltage lockout (6.17V rising threshold, 0.5V hysteresis) and hiccup-mode short-circuit protection ensure robust operation across harsh industrial environments.
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 Range | 1.265V to 11V - adjustable via external resistor divider referenced to 1.228V FB pin |
| Max Output Current | 2A continuous - limited by internal 3.3A peak switch current and thermal derating (2.67W @ +70°C) |
| Quiescent Current | 310µA typical at no load - enables low-power standby modes in always-on systems |
| Switching Frequency | 127kHz fixed or externally synchronized (119–200kHz) - reduces EMI filtering burden vs. higher-frequency alternatives |
| Internal High-Side RDS(ON) | 0.26Ω - minimizes conduction loss and eliminates need for external high-side MOSFET |
| Thermal Shutdown | +175°C junction with +20°C hysteresis - provides fail-safe protection during overload or poor heatsinking |
Pinout & Package
The MAX5090CATE is housed in a 16-pin thin QFN package (5mm × 5mm) with exposed thermal pad (EP), rated for -40°C to +125°C ambient operation and capable of dissipating 2.67W at +70°C on JEDEC 51 multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX (Pins 1,2) | Switch node | Connection to inductor and Schottky rectifier cathode; carries high di/dt switching current |
| BST (Pin 3) | Bootstrap supply | Requires 0.22µF ceramic capacitor to LX for high-side gate drive voltage generation |
| VIN (Pin 4) | Main input supply | Accepts 6.5–76V; must be bypassed with low-ESR capacitor near device |
| VD (Pin 5) | Internal regulator output | 7.8V ±0.6V regulated supply for gate driver; bypass with 3.3µF ceramic to PGND |
| SYNC (Pin 6) | Frequency sync input | Connect to SGND for 127kHz internal clock; accept 119–200kHz external clock for EMI reduction |
| SS (Pin 7) | Soft-start control | External capacitor sets ramp time; internal default is 700µs with 4.5–16µA charge current |
| FB (Pin 8) | Feedback input | Senses output via resistor divider; regulates to 1.228V reference for adjustable VOUT |
| ON/OFF (Pin 9) | Enable/shutdown control | Logic-high (>1.38V) enables; logic-low disables with 19µA shutdown current |
| SGND (Pin 10) | Signal ground | Must be connected to PGND; separates analog reference from power return path |
| PGND (Pin 12) | Power ground | Main return path for high-current LX and DRAIN paths; connect EP to this plane |
| DRAIN (Pins 13,14) | High-side switch drain | Internally connected to DMOS transistor drain; not user-accessible for external connection |
| N.C. (Pins 11,15,16) | No connection | Not bonded internally; leave unconnected and unpopulated on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-voltage DMOS switch | 0.26Ω RDS(ON) enables single-chip 76V-to-5V conversion without external MOSFET |
| Internal frequency compensation | Optimized for 100µH inductor + 100µF/50mΩ ESR output cap - eliminates external compensation network |
| Programmable soft-start | External CSS capacitor allows precise control of output ramp rate to prevent inrush and overshoot |
| Hiccup-mode short-circuit protection | Auto-retry shutdown limits average power during sustained overload - prevents thermal runaway |
| Automotive temperature grade | -40°C to +125°C operation with guaranteed specs - suitable for under-hood and industrial control cabinets |
Applications
| Industrial Power Supply | Distributed Power Architecture |
|---|---|
Use Scenario: Central 24–48V DC bus powering multiple isolated 3.3V/5V/12V rails in PLC backplanes or motor drives. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering stable 2A output with tight line/load regulation (<±2% over full VIN range). Use Value: Eliminates need for external high-voltage MOSFET and compensation components, reducing BOM count and layout area by >30%. | Use Scenario: Point-of-load conversion in telecom shelf systems where multiple boards draw independent 1.8V–5V supplies from shared 48V backplane. IC Role / Device Role / Timing Role: Adjustable-output buck converter synchronized to system clock via SYNC pin to minimize conducted EMI coupling. Use Value: 119–200kHz sync range aligns switching harmonics with system timing, easing compliance with EN 55022 Class B limits. |
| Automotive Body Control Module | Harsh-Environment Sensor Node |
Use Scenario: Powering microcontrollers, CAN transceivers, and LED drivers in BCMs exposed to 12V/24V battery transients up to ±100V. IC Role / Device Role / Timing Role: Input-stage buck converter with 76V absolute max rating and undervoltage lockout (6.17V rising threshold). Use Value: Survives cold-crank (6.5V) and load-dump (up to 76V) events without external TVS, simplifying front-end protection. | Use Scenario: Remote wireless sensor nodes powered by long-life LiSOCl₂ batteries requiring ultra-low quiescent current and wide VIN tolerance. IC Role / Device Role / Timing Role: Always-on power supply with 310µA no-load IQ and 19µA shutdown current, supporting multi-year battery life. Use Value: Enables >10-year operation on a single AA-sized primary cell when paired with duty-cycled sensing loads. |
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, 1.5A output, 100–2.2MHz adjustable frequency, requires external compensation | Higher switching frequency enables smaller magnetics but increases EMI filtering complexity | Choose LM5164QPWPRQ1 when board space is constrained and higher-frequency operation is acceptable |
| TPS54260DGQR | 3.5–60V input, 2.5A output, 100kHz–2.5MHz sync range, integrated error amp compensation | Lower max input voltage (60V vs. 76V) and no hiccup-mode protection | Choose TPS54260DGQR when cost sensitivity outweighs need for 76V rating and robust fault handling |
Compared with LM5164QPWPRQ1 and TPS54260DGQR, the MAX5090CATE offers superior high-voltage tolerance (76V), integrated hiccup protection, and factory-compensated loop stability - making it optimal for unregulated industrial and automotive inputs where reliability trumps footprint minimization.
Availability
MAX5090CATE is available at Aetrix Electronics and suitable for industrial power supplies, distributed power architectures, and automotive body control modules requiring stable component supply with guaranteed long-term availability and automotive-grade qualification.
Supply support for MAX5090CATE 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, and communications applications.
The MAX5090CATE belongs to the MAXPower family of high-voltage DC-DC converters engineered for rugged industrial and automotive power conversion where input transients, thermal stress, and long-term reliability are critical design constraints.
FAQ
What is the feedback reference voltage for MAX5090CATE?
The MAX5090CATE uses a precise 1.228V internal reference at the FB pin to regulate the output voltage. This value is guaranteed across temperature (-40°C to +125°C) and input voltage (6.5V to 76V), with min/max bounds of 1.191V and 1.265V. When designing the resistor divider for adjustable output, the formula R3 = R4 × (VOUT − 1.228)/1.228 must be applied using this exact reference to achieve target VOUT accuracy. The MAX5090CATE's feedback architecture ensures stable regulation even with varying load and line conditions.
Can MAX5090CATE synchronize to an external clock, and what is the valid frequency range?
Yes, the MAX5090CATE supports external clock synchronization via the SYNC pin, accepting frequencies from 119kHz to 200kHz. When an external clock meeting minimum pulse-width (350ns) and voltage thresholds (high ≥2.0V, low ≤0.8V) is applied for four consecutive cycles, the device switches from its internal 127kHz oscillator to the external source. After synchronization, the MAX5090CATE generates a VIN-proportional ramp aligned to the external clock period. This capability enables deterministic EMI reduction in noise-sensitive systems such as medical instrumentation or automotive ADAS modules.
What is the maximum power dissipation and thermal resistance of MAX5090CATE?
The MAX5090CATE has a thermal resistance θJA of 30°C/W (JEDEC 51 multilayer board) and a maximum continuous power dissipation of 2.67W at +70°C ambient. Derating is 33.3mW/°C above +70°C, limiting usable power to ~2.0W at +85°C ambient. Junction temperature must remain below +150°C for reliable operation, with thermal shutdown activating at +175°C (with +20°C hysteresis). These values assume proper PCB layout: full-solder connection of the exposed pad (EP) to a solid PGND plane and adequate copper area for heat spreading.
How does the ON/OFF pin function in MAX5090CATE, and what are its voltage thresholds?
The ON/OFF pin of the MAX5090CATE serves as a logic-controlled enable input with a rising threshold of 1.38V (typical) and 1.546V (max), and 100mV hysteresis. Driving the pin below 1.18V disables the device, reducing VIN supply current to 19µA (typ). It accepts voltages from 0V to VIN, allowing direct connection to VIN for automatic startup or to a microcontroller GPIO for controlled sequencing. During shutdown, the internal high-side DMOS is turned off and all bias circuitry is disabled - ensuring minimal system power draw in standby states. This behavior is fully specified in the MAX5090CATE electrical characteristics table.
What external components are mandatory for stable operation of MAX5090CATE?
Four external components are mandatory for stable operation of the MAX5090CATE: (1) a 0.22µF ceramic capacitor between BST and LX for high-side gate drive; (2) a 3.3µF ceramic capacitor from VD to PGND for internal regulator bypass; (3) an external resistor divider (R3/R4) connected to FB for output voltage setting; and (4) a Schottky rectifier (e.g., PDS5100H) from LX to PGND for freewheeling. Additionally, input (68µF aluminum + 0.47µF ceramic) and output (100µF tantalum/aluminum) capacitors are required per the recommended design values in the datasheet to ensure loop stability and ripple performance.
MAX5090CATE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX5090CATE FAQ
1.How can I place an order for MAX5090CATE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5090CATE 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 reliable?
The price and inventory of MAX5090CATE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5090CATE is usually 5 days.
3.What payment methods are accepted for MAX5090CATE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5090CATE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5090CATE?
MAX5090CATE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5090CATE 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?
For technical support, including MAX5090CATE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5090CATE requirements.
6.How does Aetrix verify that MAX5090CATE is sourced from the original manufacturer or authorized distributors?
All MAX5090CATE 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 meets industry standards.
7.What is the process for return or replacement of MAX5090CATE?
All MAX5090CATE units undergo pre-shipment inspection (PSI). If there is an issue with MAX5090CATE, 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 part is unused and in its original packaging.
Return procedure for MAX5090CATE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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