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Analog Devices Inc./Maxim Integrated MAX5090CATE/V+
- Part No.:
- MAX5090CATE/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5090CATE/V+.pdf
- Description:
- IC REG BUCK ADJ 2A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,951
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Product details
Overview
MAX5090CATE/V+ 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 operation from −40°C to +125°C. It delivers 1.265V to 11V output voltage, consumes only 310µA quiescent current at no load, and integrates frequency compensation, soft-start, thermal shutdown, and hiccup-mode short-circuit protection - used in industrial power supplies and distributed power architectures.
For engineers reviewing the MAX5090CATE/V+ datasheet, MAX5090CATE/V+ pinout, MAX5090CATE/V+ application, or MAX5090CATE/V+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-temperature performance, real-world efficiency curves (up to 88% at 1A), and two rigorously cross-checked alternative parts for adjustable-output 76V buck converters.
Technical Context
The MAX5090CATE/V+ employs voltage-mode control with VIN feed-forward and an integrated high-voltage DMOS switch, enabling stable regulation across 6.5V–76V input while maintaining >88% efficiency at 1A/5V output. Its internal 127kHz oscillator supports external synchronization (119–200kHz), and automatic pulse-skipping mode reduces no-load IQ to 310µA without compromising transient response.
It features programmable soft-start via external capacitor (SS pin), internal 1.228V feedback reference (FB pin), undervoltage lockout (6.17V rising threshold), and thermal shutdown at +175°C with 20°C hysteresis. The device uses a dedicated power ground (PGND) and signal ground (SGND), requiring connection between them for proper operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.5V to 76V - supports wide-range industrial and automotive battery inputs including 24V, 48V, and 72V nominal systems. |
| Output Voltage Range | 1.265V to 11V - adjustable via external resistor divider on FB pin; enables single-part flexibility across multiple rail requirements. |
| Max Output Current | 2A continuous - sustained under full temperature range (−40°C to +125°C) with proper thermal layout and PCB copper area. |
| Switching Frequency | Fixed 127kHz or externally synchronized 119–200kHz - enables EMI control and avoids noise-sensitive bands in system-level designs. |
| Quiescent Current | 310µA at no load - minimizes standby power loss in always-on industrial monitoring and telemetry applications. |
| Shutdown Current | 19µA typical - ensures ultra-low power state when disabled, critical for battery-backed or energy-harvesting systems. |
| Internal High-Side RDS(ON) | 0.26Ω - reduces conduction loss and improves efficiency at high input voltages compared to discrete-FET solutions. |
| Operating Temperature | −40°C to +125°C junction - qualified for under-hood automotive, factory automation, and outdoor industrial equipment. |
Pinout & Package
MAX5090CATE/V+ 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 but not used as sole ground connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 LX | Source of internal high-side DMOS switch | Connects to inductor node; carries high-frequency switching current; requires low-inductance layout to minimize ringing. |
| 3 BST | Bootstrap capacitor connection | Connect 0.22µF ceramic cap between BST and LX to generate gate drive voltage for high-side FET. |
| 4 VIN | Main input supply (6.5V–76V) | Bypass with low-ESR capacitor near pin; withstands up to +80V absolute max; feeds internal regulator VD. |
| 5 VD | Internally regulated 7.8V output | Supplies gate driver and analog circuitry; bypass with ≥3.3µF ceramic cap to PGND for stability. |
| 6 SYNC | External clock synchronization input | Pull to SGND for 127kHz internal operation; accept 119–200kHz external clock for EMI reduction. |
| 7 SS | Soft-start timing capacitor connection | Connect external capacitor to SGND to set startup ramp time; default internal soft-start is 700µs. |
| 8 FB | Feedback input for output voltage regulation | Reference voltage = 1.228V; connect resistive divider from VOUT to SGND to set output (1.265V–11V). |
| 9 ON/OFF | Logic-controlled enable/shutdown input | Rising threshold = 1.546V max; hysteresis = 100mV; drives internal logic; connect to VIN for always-on operation. |
| 10 SGND | Signal ground reference | Must be connected to PGND; separates analog reference paths from high-current return paths. |
| 11, 15, 16 N.C. | No internal connection | Leave unconnected; no electrical function; may be tied to SGND for mechanical stability if needed. |
| 12 PGND | Power ground return path | Primary return for high-current switch node (LX) and output rectifier; connect directly to EP and input/output caps. |
| 13, 14 DRAIN | Drain of internal high-side DMOS switch | Internally connected to LX; not user-accessible; forms part of integrated power stage. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.26Ω high-side DMOS FET | Eliminates need for external high-voltage MOSFET and driver, reducing BOM count and PCB footprint by >30% vs. controller-based solutions. |
| Internal frequency compensation | Enables stable operation with standard 100µH inductor and 100µF output capacitor - no external compensation network required. |
| Programmable soft-start (SS pin) | Prevents input surge current and output overshoot during power-up; configurable from 700µs (internal) to >10ms using external capacitor. |
| Hiccup-mode short-circuit protection | Shuts down on overcurrent, cools, then retries - protects against sustained output shorts without latch-off or manual reset. |
| Thermal shutdown with 20°C hysteresis | Turns off at +175°C junction; resumes at +155°C - prevents thermal runaway while allowing recovery after transient overload. |
| External clock synchronization (SYNC) | Aligns switching edge to system clock, reducing beat frequencies and simplifying EMI filter design in multi-rail power systems. |
Applications
| Industrial Power Supply | Distributed Power Architecture |
|---|---|
|
Use Scenario: Central 48V bus powering multiple isolated 3.3V/5V/12V point-of-load rails in PLC backplanes and motor drives. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator converting 48V to adjustable intermediate rail (e.g., 5.25V) for downstream DC-DC modules. Use Value: 88% efficiency at 1A/5V reduces heat generation in dense chassis; 76V input headroom accommodates 48V bus transients per IEC 61000-4-5. |
Use Scenario: Field-mounted sensor nodes powered from long-distance 24V PoE-like wiring with significant IR drop. IC Role / Device Role / Timing Role: Local step-down regulator delivering stable 3.3V to microcontroller and RF transceiver despite input sag to 6.5V. Use Value: 6.5V minimum input enables operation under worst-case line drop; 310µA quiescent current extends battery life in wake-on-event configurations. |
| Automotive Body Control Module | Test & Measurement Equipment |
|
Use Scenario: Powering CAN transceivers, LIN interfaces, and LED drivers in under-dash BCMs exposed to cold cranking (6.5V) and load dump (76V). IC Role / Device Role / Timing Role: Main 5V rail generator with built-in UVLO, thermal shutdown, and hiccup protection for fault-tolerant operation. Use Value: −40°C to +125°C rating meets AEC-Q100 Grade 1; hiccup mode prevents thermal damage during sustained short circuits in harness faults. |
Use Scenario: Bench power supply subsystem providing programmable auxiliary rails (e.g., 1.8V, 2.5V, 3.3V) for FPGA I/O banks and ADC references. IC Role / Device Role / Timing Role: Adjustable-output buck stage configured via precision resistor divider to deliver exact voltage rails per DUT requirement. Use Value: 1.228V FB reference with ±0.037V tolerance ensures <±1% output accuracy; SYNC pin allows synchronization to master clock for low-noise measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable-output high-voltage buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5V–65V input, 1A output, 1MHz fixed frequency, requires external compensation and bootstrap diode. | Lower max input voltage (65V vs. 76V); lower current rating (1A vs. 2A); higher switching frequency increases EMI filtering complexity. | Choose when 1MHz operation is required and 65V input suffices; verify thermal margin at 2A-equivalent loads. |
| TPS54260DGQR | 3.5V–60V input, 2.5A output, 100kHz–2.5MHz adjustable frequency, external compensation, no integrated high-side FET. | Requires external 60V MOSFET and driver; lacks integrated BST circuit; wider frequency range but higher BOM count and layout sensitivity. | Choose when adjustable frequency >127kHz is mandatory and external FET selection is preferred for optimization. |
Compared with LM5164QPWPRQ1 and TPS54260DGQR, the MAX5090CATE/V+ offers higher input voltage capability (76V), integrated 0.26Ω FET, and internal compensation - reducing component count and layout risk in space-constrained industrial and automotive applications where 127kHz operation is acceptable.
Availability
MAX5090CATE/V+ is available at Aetrix Electronics and suitable for industrial power supplies, distributed power architectures, automotive body control modules, and test & measurement equipment requiring stable component supply across extended temperature and high-input-voltage conditions.
Supply support for MAX5090CATE/V+ 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 industrial, automotive, and communications markets.
The MAX5090 series belongs to Maxim's MAXPower family of high-voltage DC-DC converters, designed specifically for ruggedized industrial and automotive power conversion where wide input range, integrated FETs, and extended temperature operation are essential.
FAQ
What output voltage range does the MAX5090CATE/V+ support?
The MAX5090CATE/V+ supports an adjustable output voltage range of 1.265V to 11V, set via an external resistor divider connected to the FB pin. Its internal feedback reference is precisely 1.228V (±0.037V), enabling accurate regulation across the full range. This differs from the fixed-output MAX5090A (3.3V) and MAX5090B (5.0V) variants. The MAX5090CATE/V+ maintains this range across its full −40°C to +125°C operating temperature.
Does the MAX5090CATE/V+ require an external bootstrap diode?
No, the MAX5090CATE/V+ does not require an external bootstrap diode. It integrates an internal low-side switch that charges the BST capacitor (0.22µF ceramic) from the internally regulated VD rail during startup. The BST-to-LX connection forms a flying capacitor configuration that self-generates the gate-drive voltage for the internal high-side DMOS FET - eliminating the need for external diodes or complex charge-pump circuits.
How is the soft-start time configured on the MAX5090CATE/V+?
The MAX5090CATE/V+ supports both internal and external soft-start. Its default internal soft-start period is 700µs. To extend it, connect an external capacitor from the SS pin to SGND; the soft-start time tSS (in seconds) is calculated as tSS = CSS × 106 / 1.46, where CSS is in farads. For example, a 0.047µF capacitor yields ~32µs, but since this is below 700µs, the internal 700µs soft-start activates. Larger capacitors (e.g., 0.1µF → ~68.5µs) still trigger the internal default unless tSS exceeds 700µs.
What protection features are integrated into the MAX5090CATE/V+?
The MAX5090CATE/V+ integrates five key protections: (1) Undervoltage lockout (UVLO) with 6.17V rising threshold and 0.5V hysteresis; (2) Cycle-by-cycle current limiting (2.4A–5.0A peak switch current); (3) Hiccup-mode output short-circuit protection; (4) Thermal shutdown at +175°C with +155°C restart hysteresis; and (5) Input overvoltage tolerance up to +80V. These operate independently and concurrently to ensure robust field reliability without external supervision.
Can the MAX5090CATE/V+ be synchronized to an external clock, and what is the valid frequency range?
Yes, the MAX5090CATE/V+ can be synchronized to an external clock applied to the SYNC pin. When an external clock is detected for four consecutive cycles, the device switches from its internal 127kHz oscillator to the external source. The guaranteed synchronization range is 119kHz to 200kHz. The SYNC input accepts TTL/CMOS logic levels, requires minimum pulse width of 350ns, and has leakage current of ±1µA - enabling direct interface with most microcontrollers and clock generators.
MAX5090CATE/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for MAX5090CATE/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5090CATE/V+ 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+ reliable?
The price and inventory of MAX5090CATE/V+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX5090CATE/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5090CATE/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5090CATE/V+?
MAX5090CATE/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5090CATE/V+ 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+?
For technical support, including MAX5090CATE/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5090CATE/V+ requirements.
6.How does Aetrix verify that MAX5090CATE/V+ is sourced from the original manufacturer or authorized distributors?
All MAX5090CATE/V+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX5090CATE/V+?
All MAX5090CATE/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5090CATE/V+, 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+ part is unused and in its original packaging.
Return procedure for MAX5090CATE/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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