LT3085IMS8E#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
The LT3085IMS8E#PBF is an automotive-grade positive adjustable LDO regulator with 0V to 36V output range and 500mA output current. Features 0.275V typical dropout voltage and supports paralleling for higher current. Available in 8-pin MSOP EP package with worldwide stock and shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LT3085IMS8E#PBF Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Adjustable output from 0V to 36V using a single resistor, uniquely covering ground-referenced outputs
- 500mA output current with only 0.275V typical dropout for efficient low-headroom regulation
- Paralleling capability allows multiple LT3085 units to share current for higher total output current
- Automotive-grade operation up to 125°C junction temperature with robust 36V input-output differential
Applications
The LT3085IMS8E#PBF is designed for automotive power management, post-regulator rails, and precision analog supply systems that require a clean adjustable output from 0V to 36V with low dropout. Its ability to be paralleled with other LT3085 devices makes it ideal for high-current automotive sensor supplies, motor control bias rails, and LED driver reference circuits that need scalable current beyond 500mA. Industrial test equipment, benchtop power supply designs, and programmable voltage reference circuits also leverage its wide output range and high input-output differential.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1662 |
| YTEOL | 10 |
| Adjustability | ADJUSTABLE |
| Dropout Voltage1-Max | 0.45V |
| Dropout Voltage1-Nom | 0.275V |
| Input-Output Voltage Differential-Max | 36V |
| Input-Output Voltage Differential-Min | 1V |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e3 |
| Load Regulation-Max(%) | 0.0027% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.5A |
| Output Voltage1-Max | 36V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the LT3085IMS8E#PBF achieve a 0V output unlike conventional LDOs that are limited to a minimum reference voltage?
The LT3085IMS8E#PBF uses a current-mode reference architecture where a single external resistor from SET to GND programs output voltage down to 0 V. Unlike voltage-mode LDOs with a fixed 1.2 V internal reference that limits minimum output to 1.2 V, the LT3085 reference current of 50 µA flows through the resistor to set VOUT, enabling true 0 V output for applications such as programmable supply rails and variable test bench regulators with up to 36 V differential.
How can multiple LT3085IMS8E#PBF devices be paralleled to deliver more than 500mA, and what determines the current sharing balance?
Up to several LT3085 units can be paralleled by connecting their SET, IN, and OUT pins together with a small ballast resistor—typically 10 mΩ to 50 mΩ—in series with each OUT pin. The current-mode architecture inherently balances load current to within 10% across paralleled units without complex feedback circuits. For example, 4 units in parallel deliver up to 2 A continuous output, suitable for powering high-current automotive actuators or FPGA core rails in test equipment.
What makes the LT3085IMS8E#PBF suitable for automotive applications with wide input voltage swings?
The LT3085IMS8E#PBF tolerates a maximum input-output differential of 36 V, covering the full automotive voltage range including 12 V nominal, cold-crank transients down to 6 V, and load-dump spikes to 40 V on a 12 V bus. Its automotive-grade junction temperature rating up to 125°C ensures reliable operation in under-hood environments, and the 0.275 V typical dropout maintains 500 mA output regulation with as little as 1 V of headroom during cold-start conditions.
How does the 8-pin MSOP EP package of the LT3085IMS8E#PBF manage thermal dissipation at 500mA output current?
The exposed pad (EP) of the MSOP-8 package reduces junction-to-board thermal resistance to approximately 40°C/W when soldered to a 2-layer PCB with 1 inch² copper pour. At 500 mA and a 5 V input-to-output differential—dissipating 2.5 W—the junction temperature rise above a 25°C ambient is approximately 100°C, reaching 125°C. Increasing copper area to 4 inch² lowers thermal resistance to ~25°C/W, reducing junction temperature rise to ~63°C and improving reliability margin.
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