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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:508
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Product details
Overview
MAX5090CATE+ from Maxim Integrated is a high-voltage, adjustable-output synchronous step-down DC-DC converter with integrated 0.26Ω high-side DMOS FET, operating from 6.5V to 76V input and delivering up to 2A output current. It features fixed 127kHz PWM operation, pulse-skipping mode for light-load efficiency, internal frequency compensation, and automotive-grade operation from –40°C to +125°C. Used in industrial power supplies requiring wide-input, compact, thermally robust regulation.
For engineers reviewing the MAX5090CATE+ datasheet, MAX5090CATE+ pinout, MAX5090CATE+ application, or MAX5090CATE+ equivalent, key selection criteria include its 1.265V–11V adjustable output range, 310µA no-load quiescent current, 19µA shutdown current, external synchronization capability (119–200kHz), and thermal shutdown at +175°C - all validated for automotive and harsh-environment designs.
Technical Context
The MAX5090CATE+ implements voltage-mode control with VIN feed-forward and an internal high-side DMOS switch, enabling stable regulation across a 11.5× input voltage range. Its architecture integrates internal frequency compensation, eliminating external compensation components while maintaining >60° phase margin with recommended 100µH/100µF output filter.
It supports dual-mode operation: fixed-frequency PWM at 127kHz under heavy load and automatic transition to pulse-skipping mode below ~60mA load to sustain >80% efficiency down to µA-level loads. Synchronization via SYNC pin allows noise-sensitive systems to align switching with external clocks between 119kHz and 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 ±0.037V reference enables precise output programming. |
| Max Output Current | 2A continuous - limited by internal 3.3A peak switch current and thermal design; derates above +70°C ambient per θJA = 30°C/W. |
| Quiescent Current | 310µA (typ) at no load - enables always-on subsystems in battery-powered equipment without significant standby drain. |
| Switching Frequency | Fixed 127kHz (internal) or 119–200kHz (external sync) - balances EMI, inductor size, and efficiency; avoids AM radio band. |
| Thermal Shutdown | +175°C junction trip with +20°C hysteresis - protects against sustained overload or poor PCB heatsinking; recovers autonomously at +155°C. |
| Package | 16-pin TQFN-EP (5mm × 5mm, 0.8mm height) - exposed pad enhances thermal performance; rated for 2.67W dissipation at +70°C. |
Pinout & Package
MAX5090CATE+ uses a 16-pin thin QFN package (5mm × 5mm) with exposed thermal pad (EP), optimized for high-power density and thermal management in space-constrained industrial and automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX (Pins 1, 2) | Switch node connection | Drives external inductor; connects to BST capacitor and internal high-side FET source - must be routed with low-inductance, high-current traces. |
| BST (Pin 3) | Bootstrap supply for high-side gate drive | Requires 0.22µF ceramic capacitor to LX; enables full enhancement of internal 0.26Ω DMOS FET across full VIN range. |
| VIN (Pin 4) | Main power input | Accepts 6.5V–76V; bypassed to SGND with low-ESR capacitor near pin to suppress switching transients and ripple. |
| VD (Pin 5) | Internal analog regulator output | Provides 7.8V ±0.6V regulated supply for internal circuitry; requires 3.3µF ceramic bypass to PGND. |
| SYNC (Pin 6) | External clock synchronization input | Pull to SGND for 127kHz internal operation; accepts 119–200kHz external clock with ≥350ns pulse width for EMI control. |
| SS (Pin 7) | Soft-start timing control | Connects to external capacitor to program soft-start time >700µs; default internal soft-start is 700µs (typ). |
| FB (Pin 8) | Feedback input for output voltage regulation | Senses output via resistor divider; regulates to 1.228V reference - sets VOUT = 1.228V × (1 + R3/R4) for MAX5090C. |
| ON/OFF (Pin 9) | Enable/shutdown control | Logic-high (>1.546V) enables operation; logic-low disables converter and reduces VIN current to 19µA (typ). |
| SGND (Pin 10) | Signal ground reference | Must be connected to PGND; serves as reference for FB, SS, SYNC, ON/OFF, and internal analog blocks. |
| PGND (Pin 12) | Power ground return | Primary return path for high-current LX switching loop and internal FET; connects directly to EP for thermal conduction. |
| DRAIN (Pins 13, 14) | High-side FET drain connection | Internally tied to LX through DMOS channel; not user-accessible - functions as internal switch node terminal. |
| N.C. (Pins 11, 15, 16) | No connection | Not bonded or internally connected; must remain unconnected and unpopulated on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.26Ω high-side DMOS FET | Reduces external component count and conduction losses; enables >92% peak efficiency at 12VIN/5VOUT/1A. |
| Internal frequency compensation | Eliminates need for external compensation network; ensures stable loop response with standard 100µH/100µF output filter. |
| Pulse-skipping light-load mode | Maintains >80% efficiency at 1mA load; extends battery life in always-on monitoring and sensor nodes. |
| Programmable soft-start (SS pin) | Prevents inrush current and output overshoot during startup or wake-up; configurable from 700µs to >10ms via CSS capacitor. |
| Hiccup-mode short-circuit protection | Shuts down on overcurrent, cools, then retries - prevents thermal runaway during sustained output fault conditions. |
| Automotive temperature grade | Qualified for –40°C to +125°C ambient; meets AEC-Q100 stress test requirements for under-hood and industrial control environments. |
Applications
| Industrial PLC Power Supply | Railway Onboard Electronics |
|---|---|
|
Use Scenario: Powering 3.3V/5V logic and I/O modules in programmable logic controllers operating from 24V or 48V DC distribution rails. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing tightly regulated, low-noise output with hiccup-mode fault recovery. Use Value: Enables single-stage conversion from wide-range industrial bus voltages while meeting EN 50155 surge immunity and thermal cycling requirements. |
Use Scenario: Generating 5V/2A for onboard communication gateways and sensor interfaces in rolling stock with 72V nominal battery systems. IC Role / Device Role / Timing Role: High-reliability step-down converter supporting cold-crank (6.5V) and load-dump (76V) transients per EN 50121-3-2. Use Value: Delivers uninterrupted operation across extreme rail voltage variations without external TVS or pre-regulator stages. |
| Automotive Body Control Module | Telecom Remote Radio Unit |
|
Use Scenario: Supplying 3.3V microcontroller core and CAN transceiver in body electronics modules powered from 12V battery with stop-start capability. IC Role / Device Role / Timing Role: Always-on buck regulator with ultra-low 310µA quiescent current and controlled soft-start to meet ISO 16750-2 sleep current limits. Use Value: Reduces parasitic drain below 20µA in shutdown mode and maintains <±2% output accuracy over –40°C to +105°C junction temperature. |
Use Scenario: Providing 12V intermediate bus for RF power amplifiers in outdoor small-cell base stations powered from 48V telecom rectifiers. IC Role / Device Role / Timing Role: High-efficiency, synchronized buck stage enabling coordinated switching with other converters to minimize conducted EMI. Use Value: Allows system-level EMI filtering with smaller LC components due to externally synchronized 127kHz–200kHz operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5V–65V input, 1.5A output, 2.1MHz fixed frequency, requires external compensation. | Higher switching frequency enables smaller magnetics but increases EMI filtering complexity; lower max current limits use cases requiring >1.5A. | Select when board space is critical and input voltage stays ≤65V; avoid if 76V transient tolerance or 2A continuous load is required. |
| TPS54260DGQR | 3.5V–60V input, 2.5A output, 100kHz–2.5MHz adjustable frequency, external compensation. | Wider frequency adjustability aids EMI tuning but demands full loop design; lacks integrated bootstrap diode and hiccup protection. | Choose when flexible frequency tuning and higher peak current are needed; verify thermal performance at 76V input and full 2A load. |
Compared with LM5164QPWPRQ1 and TPS54260DGQR, the MAX5090CATE+ offers guaranteed 76V absolute maximum input rating, integrated compensation, and automotive-qualified thermal shutdown - simplifying design for high-reliability 2A applications where input voltage exceeds 65V.
Availability
MAX5090CATE+ is available at Aetrix Electronics and suitable for industrial automation, railway electronics, and automotive body control modules requiring stable component supply across extended temperature and voltage ranges.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX5090 series belongs to Maxim's MAXPower family of high-voltage DC-DC converters, designed specifically for rugged, wide-input industrial and automotive power supplies where reliability, thermal robustness, and minimal external components are critical.
FAQ
What output voltage range does the MAX5090CATE+ support?
The MAX5090CATE+ supports an adjustable output voltage range of 1.265V to 11V, set using an external resistor divider on the FB pin. Its internal feedback reference is precisely trimmed to 1.228V (±0.037V), enabling accurate output programming across temperature and line variations. This differs from the fixed-output MAX5090A (3.3V) and MAX5090B (5.0V) variants.
How does the MAX5090CATE+ achieve high efficiency at light loads?
The MAX5090CATE+ automatically transitions from fixed-frequency PWM mode to pulse-skipping mode below ~60mA load current. In this mode, it skips switching cycles to reduce switching losses while maintaining regulation, achieving >80% efficiency even at 1mA output. Its 310µA no-load quiescent current further minimizes standby power loss.
Can the MAX5090CATE+ be synchronized to an external clock?
Yes, the MAX5090CATE+ supports external synchronization via the SYNC pin, accepting clock frequencies from 119kHz to 200kHz. When an external clock is applied for four consecutive cycles, the device locks to it and replaces its internal 127kHz oscillator. The minimum pulse width requirement is 350ns to ensure reliable detection and avoid noise-induced false triggering.
What thermal protection features does the MAX5090CATE+ include?
The MAX5090CATE+ incorporates thermal shutdown that activates at +175°C junction temperature, turning off the internal FET and resetting soft-start. It remains latched off until the die cools to +155°C (20°C hysteresis), then resumes operation in hiccup mode. This protects against sustained overload or inadequate heatsinking while allowing autonomous recovery in intermittent fault conditions.
Is the MAX5090CATE+ suitable for automotive applications?
Yes, the MAX5090CATE+ is qualified for the automotive temperature range (–40°C to +125°C ambient), features undervoltage lockout with 0.5V hysteresis, hiccup-mode short-circuit protection, and operates reliably across cold-crank (6.5V) and load-dump (76V) transients. Its 16-pin TQFN-EP package supports robust thermal performance required in under-hood environments.
MAX5090CATE+ 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:
- 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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