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Analog Devices Inc./Maxim Integrated MAX5090BATE+
- Part No.:
- MAX5090BATE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5090BATE+.pdf
- Description:
- IC REG BUCK 5V 2A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,342
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Product details
Overview
MAX5090BATE+ from Maxim Integrated is a high-voltage, 2A synchronous step-down DC-DC converter with fixed 5.0V output, operating from 7.5V to 76V input and delivering up to 92% efficiency at 1A load. It integrates a 0.26Ω high-side DMOS FET, internal frequency compensation, and operates across the automotive temperature range (−40°C to +125°C) in a 16-pin TQFN-EP package. It is used in distributed power systems requiring robust, compact, high-efficiency regulation under wide-input conditions.
For engineers reviewing the MAX5090BATE+ datasheet, MAX5090BATE+ pinout, MAX5090BATE+ application, or MAX5090BATE+ equivalent, key selection considerations include its 5.0V fixed output accuracy (±3%), 127kHz switching frequency with external synchronization capability, 310µA no-load quiescent current, thermal shutdown at +175°C, and compatibility with standard 100µH inductors and Schottky rectifiers such as PDS5100H.
Technical Context
The MAX5090BATE+ implements voltage-mode PWM control with voltage feed-forward, enabling stable regulation across a 10.3:1 input voltage range. Its integrated high-side DMOS switch and internal gate drive (BST pin) eliminate external driver components while supporting bootstrap operation for efficient high-side conduction.
It features automatic transition between fixed-frequency PWM mode (127kHz) and pulse-skipping mode at light loads to maintain high efficiency down to microampere loads. Protection includes cycle-by-cycle current limiting (3.3A typ), hiccup-mode short-circuit response, undervoltage lockout (6.17V rising threshold), and thermal shutdown with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports wide industrial and automotive battery-fed rails without pre-regulation. |
| Output Voltage | 5.0V ±3% - tightly regulated fixed output; no external feedback resistors required. |
| Max Output Current | 2A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in harsh environments. |
| Switching Frequency | 127kHz (fixed) or 119–200kHz (synchronized) - enables predictable EMI filtering and avoids audio-band noise. |
| Quiescent Current | 310µA at no load - extends battery life in always-on systems such as telematics or remote monitoring. |
| Shutdown Current | 19µA typical - ensures minimal leakage during system sleep modes. |
| Thermal Shutdown | +175°C junction temperature - protects against sustained overload or poor heatsinking in sealed enclosures. |
Pinout & Package
The MAX5090BATE+ is housed in a 5mm × 5mm, 16-pin thin QFN package with exposed pad (TQFN-EP), optimized for thermal dissipation (θJA = 30°C/W) and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | LX | Switch node - connects to inductor and Schottky diode cathode; carries high dv/dt and pulsed current. |
| 3 | BST | Bootstrap capacitor connection - supplies gate drive voltage for internal high-side DMOS via 0.22µF ceramic cap to LX. |
| 4 | VIN | Main input supply - requires local low-ESR bypass (≥68µF) close to pin; rated to +80V absolute max. |
| 5 | VD | Internal 7.8V regulator output - powers internal analog circuitry; bypassed with 3.3µF ceramic to PGND. |
| 6 | SYNC | External clock input - synchronizes switching to system clock (119–200kHz); grounded for internal 127kHz operation. |
| 7 | SS | Soft-start timing control - external capacitor sets ramp time; default internal soft-start is 700µs. |
| 8 | FB | Feedback input - internally tied to VOUT for fixed 5.0V output; not user-adjustable on MAX5090BATE+. |
| 9 | ON/OFF | Logic-level enable - <1.18V disables device (19µA shutdown); >1.546V enables; hysteresis prevents chatter. |
| 10 | SGND | Signal ground - must be connected to PGND; separates analog reference from power return paths. |
| 11, 15, 16 | N.C. | No internal connection - left unconnected; no routing or thermal tie required. |
| 12 | PGND | Power ground - primary return path for high-current LX and VIN loops; soldered to EP for thermal relief. |
| 13, 14 | DRAIN | High-side switch drain - internal connection point of DMOS; electrically tied to LX through switch channel. |
| EP | Exposed Pad | Thermal and electrical ground - must be soldered to SGND/PGND plane; not a substitute for pin 12 connection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.26Ω High-Side DMOS | Reduces external component count and conduction losses; eliminates need for external MOSFET driver. |
| Internal Frequency Compensation | Enables stable operation with standard 100µH inductor and 100µF output capacitor - no loop compensation design required. |
| Pulse-Skipping Light-Load Mode | Maintains >80% efficiency at 10mA load - critical for battery-backed or energy-harvesting applications. |
| External Synchronization Input | Allows EMI reduction by aligning switching edges with system clocks - avoids beat frequencies in multi-rail systems. |
| Hiccup-Mode Short-Circuit Protection | Shuts down and auto-restarts during sustained overloads - prevents thermal runaway without manual reset. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power |
|---|---|
|
Use Scenario: Powering CAN transceivers, microcontrollers, and sensor interfaces in under-hood ECUs exposed to 12V/24V battery transients and −40°C to +125°C ambient. IC Role / Device Role / Timing Role: Primary 5V rail generator with transient immunity and thermal resilience; replaces discrete buck controllers + MOSFETs. Use Value: Eliminates external gate driver and compensation network; withstands load dump (up to 76V) without derating or protection circuitry. |
Use Scenario: Providing isolated 5V logic supply for digital I/O modules in factory automation cabinets with 24V DC field buses. IC Role / Device Role / Timing Role: Compact, high-efficiency point-of-load regulator with low EMI profile suitable for dense backplane mounting. Use Value: Delivers full 2A at 92% efficiency with only 310µA quiescent draw - reduces heat sink requirements and improves system MTBF. |
| Railway Signaling Interface | Energy Meter Auxiliary Supply |
|
Use Scenario: Generating stable 5V for FPGA-based track occupancy detectors powered from 72V nominal traction battery systems. IC Role / Device Role / Timing Role: High-input-voltage DC-DC converter with synchronization capability to avoid interference with communication timing signals. Use Value: SYNC pin allows alignment to master clock - suppresses conducted EMI in safety-critical signaling circuits. |
Use Scenario: Powering metrology ASICs and RTCs in smart electricity meters where long-term reliability and low standby consumption are mandatory. IC Role / Device Role / Timing Role: Always-on auxiliary supply with ultra-low 310µA no-load IQ and thermal shutdown for fault containment. Use Value: Meets IEC 62053-21 standby power limits (<10mW) while maintaining 5V regulation across 6.5–76V input variation. |
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, 5V fixed output, 1A max, 1.5MHz switching, no internal FET - requires external high-side MOSFET. | Higher frequency enables smaller magnetics but increases EMI sensitivity; lower current rating limits use in 2A nodes. | Select when board area is constrained and 1A suffices; avoid if 2A continuous load or 76V input tolerance is required. |
| TPS54260DGQR | 3.5–60V input, adjustable output, 2.5A max, 100kHz–2.5MHz sync-capable, integrated FET, but no BST pin - uses different gate drive architecture. | Lacks dedicated bootstrap pin; requires external bootstrap diode/capacitor; wider input range than MAX5090BATE+ but lower max input voltage (60V vs. 76V). | Prefer for designs needing adjustable output or higher switching frequency flexibility; verify thermal performance at 76V input - not rated. |
Compared with LM5164QPWPRQ1 and TPS54260DGQR, the MAX5090BATE+ offers superior 76V input tolerance, integrated 0.26Ω FET with dedicated BST drive, and guaranteed 2A operation across −40°C to +125°C - making it uniquely suited for automotive and railway applications where input transients and thermal margin are critical.
Availability
MAX5090BATE+ is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O power supplies, railway signaling interfaces, and energy meter auxiliary supplies requiring stable component supply across extended temperature and high-input-voltage conditions.
Supply support for MAX5090BATE+ 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 demanding industrial, automotive, and communications applications.
The MAX5090 series was developed specifically for high-input-voltage, high-reliability DC-DC conversion in automotive and industrial environments - emphasizing integration, thermal robustness, and transient immunity without external compensation.
FAQ
What is the maximum input voltage rating for the MAX5090BATE+?
The MAX5090BATE+ has an absolute maximum input voltage rating of +80V at the VIN pin, with guaranteed operation up to +76V across the full −40°C to +125°C temperature range. This makes it suitable for 24V and 48V industrial systems, as well as automotive 12V/24V platforms subject to load dump transients per ISO 7637-2.
Does the MAX5090BATE+ require external feedback resistors to set the output voltage?
No. The MAX5090BATE+ is the fixed 5.0V output variant and internally connects the FB pin to the regulated output - no external resistors are needed. The FB pin is not user-adjustable on this version; only the MAX5090CATE+ supports external resistor programming of output voltage from 1.265V to 11V.
How does the MAX5090BATE+ handle thermal overload conditions?
The MAX5090BATE+ activates thermal shutdown when junction temperature exceeds +175°C, turning off the internal high-side FET and entering hiccup mode. It automatically resumes operation once die temperature falls to +155°C. This behavior is documented in the Thermal-Overload Protection section of the MAX5090BATE+ datasheet and is fully characterized across temperature.
Can the MAX5090BATE+ be synchronized to an external clock, and what is the supported frequency range?
Yes. The MAX5090BATE+ accepts an external clock signal on the SYNC pin, supporting synchronization from 119kHz to 200kHz. When SYNC is grounded, it defaults to its internal 127kHz oscillator. The device locks to the external clock after four valid cycles and blanks the first 375µs of the SYNC ramp to ensure stable acquisition.
What is the recommended input capacitor configuration for the MAX5090BATE+ at 76V input?
For 76V input, Maxim recommends a 68µF low-ESR aluminum electrolytic capacitor in parallel with a ≥1µF ceramic capacitor near the VIN and PGND pins. This combination handles high ripple current, suppresses ESR-related heating at cold temperatures, and meets the peak-to-peak input ripple requirement of ≤100mV as specified in the MAX5090BATE+ application guidelines.
MAX5090BATE+ 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 6.5V
- Voltage - Input (Max):
- 76V
- Voltage - Output (Min/Fixed):
- 5V
- 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)
MAX5090BATE+ FAQ
1.How can I place an order for MAX5090BATE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5090BATE+ 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 MAX5090BATE+ reliable?
The price and inventory of MAX5090BATE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5090BATE+ is usually 5 days.
3.What payment methods are accepted for MAX5090BATE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5090BATE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5090BATE+?
MAX5090BATE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5090BATE+ 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 MAX5090BATE+?
For technical support, including MAX5090BATE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5090BATE+ requirements.
6.How does Aetrix verify that MAX5090BATE+ is sourced from the original manufacturer or authorized distributors?
All MAX5090BATE+ 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 MAX5090BATE+ meets industry standards.
7.What is the process for return or replacement of MAX5090BATE+?
All MAX5090BATE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5090BATE+, 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 MAX5090BATE+ part is unused and in its original packaging.
Return procedure for MAX5090BATE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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