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Analog Devices Inc./Maxim Integrated MAX5085ATT+
- Part No.:
- MAX5085ATT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
MAX5085ATT+.pdf
- Description:
- IC REG LIN POS ADJ 200MA 6TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,791
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Product details
Overview
MAX5085ATT+ from Maxim Integrated is a high-voltage linear regulator delivering 3.3V fixed or adjustable 2.54V–11V output at up to 200mA, operating from 6.5V to 65V input, with 50μA no-load quiescent current and remote sense (OUT_SENSE) capability - used in automotive body control modules requiring stable low-noise 3.3V supply under wide-input transients.
For engineers reviewing the MAX5085ATT+ datasheet, MAX5085ATT+ pinout, MAX5085ATT+ application, or MAX5085ATT+ equivalent, key selection criteria include guaranteed 200mA load capability at high VIN, thermal shutdown at +160°C, ±0.5mV/mA load regulation, 1.251V internal SET reference, and Kelvin sensing for <1% output error at the load.
Technical Context
The MAX5085ATT+ implements a BiCMOS-based linear regulation architecture with an internal 1.251V precision reference and error amplifier driving a high-voltage pass transistor. Its Dual Mode™ operation automatically selects between fixed 3.3V output (SET = GND) or adjustable output (via external resistive divider), determined solely by SET pin voltage level.
It integrates dedicated circuitry for remote sensing (15Ω internal resistor between OUT and OUT_SENSE), logic-level enable with 5MΩ pull-down, and independent thermal shutdown (+160°C trip, 10°C hysteresis) and short-circuit protection (340mA limit). All functions operate across –40°C to +125°C ambient without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.5V to 65V - supports direct connection to 12V/24V/48V industrial and automotive battery rails including load dump transients. |
| Output Voltage | Fixed 3.3V (SET = GND) or adjustable 2.54V–11V - enables single BOM for multiple system voltage domains. |
| Max Output Current | 200mA continuous - sufficient for powering microcontrollers, CAN transceivers, and sensor signal chains. |
| No-Load Quiescent Current | 51μA (typ) - enables always-on systems with multi-year battery life in low-power monitoring applications. |
| Shutdown Current | 6μA (typ) - reduces standby power to negligible levels during system sleep modes. |
| Remote Sense Accuracy | OUT_SENSE pin with 15Ω internal series resistor - enables true Kelvin sensing to eliminate trace IR drop error at the load. |
| Thermal Shutdown Threshold | +160°C with 10°C hysteresis - provides robust fault recovery under sustained overload without latch-up. |
Pinout & Package
MAX5085ATT+ is housed in a thermally enhanced 3mm × 3mm, 6-pin TDFN-EP package with exposed paddle (EP) soldered to PCB ground for optimal heat dissipation (θJC = 8.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. IN | High-voltage input supply | Accepts 6.5V–65V; requires ≥10μF ceramic bypass to GND for stability and transient suppression. |
| 2. EN | Logic-enable control input | Active-high; internal 5MΩ pull-down to GND; withstands up to 65V - allows direct tie to IN for always-on operation. |
| 3. GND | Power and signal reference ground | Must be connected to EP (exposed paddle); forms return path for all internal currents and sensing. |
| 4. SET | Feedback reference node | Connect to GND for 3.3V fixed output; connect via resistor divider for adjustable output; 1.251V internal reference. |
| 5. OUT_SENSE | Remote output voltage sense | Kelvin sense input; internally tied to OUT via 15Ω resistor; connect directly to load for <1% regulation accuracy. |
| 6. OUT | Regulated output terminal | Delivers up to 200mA; requires ≥10μF ceramic capacitor (ESR < 0.5Ω) to GND for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Output Configuration | Automatic selection between factory-trimmed 3.3V output or user-adjustable 2.54V–11V range - eliminates need for separate fixed/adjustable SKUs. |
| Remote Load Sensing | OUT_SENSE pin with 15Ω internal series resistor enables true Kelvin sensing - maintains ±0.5% output accuracy at load despite PCB trace resistance. |
| Ultra-Low Quiescent Current | 51μA typical at no load - extends battery runtime in always-on telematics and security sensors without compromising startup time. |
| Robust Fault Protection | Integrated thermal shutdown (+160°C, 10°C hysteresis) and 340mA short-circuit current limit - prevents damage during wiring faults or ESD events. |
| Automotive Temperature Range | –40°C to +125°C operation with full parameter guarantee - qualified for engine bay, chassis, and ADAS subsystems. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power |
|---|---|
|
Use Scenario: Powering microcontroller, CAN transceiver, and door-lock actuator drivers in a centralized body controller. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying noise-sensitive digital logic and communication interfaces from 12V battery rail. Use Value: Remote sensing ensures 3.3V ±1% at MCU VCC pins despite 150mΩ trace resistance; 65V input rating survives ISO 7637-2 pulse 5a load dump. |
Use Scenario: Providing isolated 3.3V supply for analog input conditioning circuits and ADC reference in modular PLC backplane. IC Role / Device Role / Timing Role: Local point-of-load regulator converting 24V field power to clean 3.3V for precision signal chain. Use Value: 50μA quiescent current minimizes self-heating in sealed enclosures; thermal shutdown prevents failure during ambient +85°C operation. |
| Home Security Panel MCU Supply | Telecom Remote Radio Unit Bias |
|
Use Scenario: Always-on 3.3V supply for ARM Cortex-M based alarm panel with cellular backup and motion sensor interface. IC Role / Device Role / Timing Role: Main system regulator enabling >5-year battery life in AC-failed mode via ultra-low IQ. Use Value: 6μA shutdown current allows deep-sleep mode; adjustable output option supports future firmware-defined voltage scaling. |
Use Scenario: Biasing RF front-end ICs and low-noise amplifiers in outdoor small-cell radio units powered from 48V PoE or DC plant. IC Role / Device Role / Timing Role: High-input LDO generating stable 3.3V for sensitive RF components amid noisy 48V supply ripple. Use Value: 55dB PSRR at 100Hz rejects switching noise from upstream DC/DC converters; remote sense compensates for long interconnect drops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3080IMSE#PBF | Adjustable only (no fixed 3.3V mode); 1.2V reference; higher IQ (~800μA); 36V max input | Lacks preset 3.3V mode and 65V rating - unsuitable for automotive load dump or 48V telecom rails | Select only if adjustable-only operation and lower dropout (<0.5V) are prioritized over input voltage range and quiescent current. |
| TLE42754G | Fixed 5V only; 40V max input; 150mA output; 150μA IQ; no remote sense | Cannot replace MAX5085ATT+ in 3.3V systems or >40V environments; lacks Kelvin sensing for precision loads | Consider only for cost-sensitive 5V automotive applications where remote sensing and ultra-low IQ are not required. |
Compared with LT3080IMSE#PBF and TLE42754G, MAX5085ATT+ uniquely combines factory-trimmed 3.3V output, 65V input tolerance, 50μA quiescent current, and remote sense capability - making it the only drop-in solution for space-constrained, high-reliability 3.3V systems operating across harsh automotive and industrial voltage ranges.
Availability
MAX5085ATT+ is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power rails, and telecom remote radio units requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX5085ATT+ 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX5085ATT+ belongs to Maxim's high-voltage linear regulator product line, engineered specifically for reliable, low-noise power delivery in automotive and industrial systems with wide-input transients and strict quiescent current requirements.
FAQ
What is the guaranteed output voltage accuracy of MAX5085ATT+ in fixed 3.3V mode?
The MAX5085ATT+ guarantees output voltage accuracy of 3.168V to 3.432V (±4%) over full temperature (–40°C to +125°C), input (6.5V to 21V), and load (1mA to 200mA) ranges when SET is grounded and OUT_SENSE is connected to OUT. This specification is production-tested and applies across the entire automotive temperature range.
Can MAX5085ATT+ be used with input voltages above 48V, and what protection does it offer?
Yes, MAX5085ATT+ supports input voltages up to 65V and includes built-in protection against overvoltage stress: absolute maximum IN-to-GND rating is +80V, and the device remains fully functional during ISO 7637-2 Pulse 5a (load dump) events. Its 65V operating range makes it suitable for 48V telecom and heavy-duty vehicle systems.
How does the OUT_SENSE pin improve regulation accuracy in MAX5085ATT+?
The OUT_SENSE pin enables Kelvin sensing by connecting directly to the load, bypassing PCB trace resistance between the MAX5085ATT+ OUT pin and the load. With its internal 15Ω series resistor, it allows the feedback loop to regulate voltage precisely at the load point - reducing output error caused by IR drop to <0.5% even with 200mΩ trace resistance.
What is the thermal performance of MAX5085ATT+ in its 3mm × 3mm TDFN package?
In the 3mm × 3mm TDFN-EP package, MAX5085ATT+ achieves θJC = 8.5°C/W and dissipates 1.905W at TA = +70°C. Derating is 23.8mW/°C above +70°C, supporting 172mA output at +85°C (VIN = 14V, VOUT = 5V) and 56mA at +125°C (VIN = 14V, VOUT = 3.3V) - all while maintaining guaranteed operation across –40°C to +125°C.
Does MAX5085ATT+ require external components for stable operation, and what are the minimum requirements?
Yes, MAX5085ATT+ requires a minimum 10μF ceramic output capacitor (ESR < 0.5Ω) from OUT to GND and a 10μF ceramic input capacitor from IN to GND for stable operation across –40°C to +125°C and up to 200mA load. X7R/X5R dielectrics are recommended; Z5U/Y5V types require ≥22μF for low-temperature stability.
MAX5085ATT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 2.54V (3.3V)
- Voltage - Output (Max):
- 11V
- Voltage Dropout (Max):
- 1.5V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 140 µA
- Current - Supply (Max):
- 4 mA
- PSRR:
- 55dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TDFN-EP (3x3)
MAX5085ATT+ FAQ
1.How can I place an order for MAX5085ATT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5085ATT+ 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 MAX5085ATT+ reliable?
The price and inventory of MAX5085ATT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5085ATT+ is usually 5 days.
3.What payment methods are accepted for MAX5085ATT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5085ATT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5085ATT+?
MAX5085ATT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5085ATT+ 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 MAX5085ATT+?
For technical support, including MAX5085ATT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5085ATT+ requirements.
6.How does Aetrix verify that MAX5085ATT+ is sourced from the original manufacturer or authorized distributors?
All MAX5085ATT+ 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 MAX5085ATT+ meets industry standards.
7.What is the process for return or replacement of MAX5085ATT+?
All MAX5085ATT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5085ATT+, 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 MAX5085ATT+ part is unused and in its original packaging.
Return procedure for MAX5085ATT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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