The lt3097 linear regulator can give both positive and negative outputs in one small device. It has very low noise, less than 0.8 µVRMS. It also has a high power supply rejection ratio, up to 76dB at 1MHz. These features make the lt3097 great for jobs that need precision and low noise, like audio and instrumentation. Many engineers pick this low noise linear regulator. More people want small and efficient linear voltage regulator solutions for things like consumer electronics and cars.
| Year | Market Size (USD Million) |
|---|---|
| 2024 | 761.55 |
| 2033 | 1084.52 |
Key Takeaways
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The LT3097 gives both positive and negative outputs. This makes it useful for many different uses.
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The LT3097 has very low noise, less than 0.8 µVRMS. It works well for sensitive circuits like audio and medical devices.
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It has a high power supply rejection ratio (PSRR) up to 76dB. This helps it work well even when input voltages change.
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It has built-in protection like overcurrent and thermal shutdown. These features help keep your circuits safe from harm.
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You should always look at the datasheet for more details. The datasheet shows specs and circuit examples to help your design.
LT3097 Linear Regulator Overview
What is the LT3097?
The lt3097 can give you both positive and negative voltages. It does this with just one device. You get two outputs from one package. One output is positive, and the other is negative. The lt3097 helps your circuits get steady and clean power. Many precision systems use the lt3097. It works in audio gear, test tools, and measurement devices. The lt3097 keeps noise very low. It also blocks signals you do not want from the power supply.
Tip: If you want less noise in your circuit, try the lt3097. Its design helps your project work better in low noise jobs.
Key Features
The lt3097 has many features that help engineers and designers. Here are some main features in the table below:
| Feature | Description |
|---|---|
| Dual Output | Positive and negative rails |
| Ultra-Low Noise | Less than 0.8 µVRMS |
| High PSRR | Up to 76dB at 1MHz |
| Wide Input Range | 3.2V to 20V |
| Output Current | Up to 500mA per channel |
| Adjustable Outputs | Set voltages with external resistors |
| Built-in Protection | Overcurrent and thermal shutdown |
The lt3097 gives you very low noise. This helps your sensitive circuits stay safe from unwanted signals. The high PSRR stops noise from the input power. You can use the lt3097 when you need both positive and negative voltages. This makes your design easier and saves space.
The lt3097 also protects your system. If your circuit uses too much current or gets too hot, the lt3097 will shut down. This keeps your system safe. You can change the output voltages by using different resistors. This lets you use the lt3097 for many projects.
You will see the lt3097 in places where clean power matters. Audio systems, medical devices, and test equipment use this low noise linear regulator. The lt3097 helps you get great results in your precision designs.
Pinout and Packages
Pinout Diagram
When you work with the LT3097, you need to understand its pinout. The pinout shows you where each connection goes on the device. You will see that the LT3097 has a special pinout for dual output operation. This pinout lets you get both positive and negative voltages from one chip. You can look at the datasheet for a full pinout diagram, but here is a simple way to think about it:
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The pinout includes input pins for power supply.
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You have output pins for both positive and negative rails.
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There are ground pins for stable operation.
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Some pins let you adjust the output voltage.
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The pinout also has pins for shutdown and error signals.
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You will find pins for feedback to help set the voltage.
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The pinout gives you clear spots for connecting external resistors.
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Each pin in the pinout has a job, so you must connect them right.
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The pinout helps you avoid mistakes in your circuit.
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Always check the pinout before you start your design.
Note: The pinout is key for making sure your LT3097 works as a dual output regulator. If you follow the pinout, you will get steady and clean power.
Pin Functions
You need to know what each pin does. Here is a table to help you:
| Pin Name | Function |
|---|---|
| VIN | Power supply input |
| VOUT+ | Positive output voltage |
| VOUT- | Negative output voltage |
| GND | Ground connection |
| ADJ+ | Adjust positive output |
| ADJ- | Adjust negative output |
| SHDN | Shutdown control |
| ERR | Error flag |
| FB+ | Positive feedback |
| FB- | Negative feedback |
Each pin in the pinout has a clear role. You use VIN to bring power in. VOUT+ and VOUT- give you the dual outputs. ADJ+ and ADJ- let you set the voltage with resistors. SHDN lets you turn the regulator on or off. ERR tells you if something is wrong. FB+ and FB- help keep the output steady.
Package Types
You can get the LT3097 in different package types. The package you choose depends on your project needs. Here are the main options:
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16-Lead TSSOP (Thin Shrink Small Outline Package)
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16-Lead DFN (Dual Flat No-Lead)
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16-Lead MSOP (Mini Small Outline Package)
Each package type gives you the same pinout. You pick the package that fits your board size and cooling needs. The pinout stays the same, so you do not have to change your design when you switch packages.
LT3097 Linear Regulator Specifications
Electrical Specs
The lt3097 works well in many circuits. It gives both positive and negative outputs. You can use it for precise jobs. The input voltage can be from 3.2V to 20V. Each output gives up to 500mA of current. You can change the output voltage with resistors. The lt3097 keeps noise very low, only 0.8µVRMS from 10Hz to 100kHz. This low noise linear regulator helps protect audio and measurement circuits from bad signals.
The power supply rejection ratio (PSRR) is high. It can reach up to 76dB at 1MHz. This means the lt3097 blocks noise from the power supply well. Your circuit will stay steady, even if the input voltage changes. The device also has reverse current protection. This keeps your circuit safe if you connect the power supply the wrong way.
Here is a table with the main electrical specs:
| Parameter | Value |
|---|---|
| Input Voltage | 3.2V to 20V |
| Output Voltage | Adjustable ±0.5V to ±19.5V |
| Output Current | Up to 500mA per rail |
| Output Noise | 0.8µVRMS (10Hz–100kHz) |
| PSRR | Up to 76dB at 1MHz |
| Dropout Voltage | 300mV (typical) |
Tip: Always look at the datasheet before using the lt3097. This helps you avoid mistakes and keeps your project safe.
Maximum Ratings
You need to know the highest limits for the lt3097. If you go over these, you can break the device. The lt3097 can take up to 22V on the input pin. The output current should not be more than 500mA for each channel. You can store it from -65°C to 150°C. It works from -40°C to 125°C. The device has thermal shutdown to stop it from getting too hot.
Here are some important safety and reliability points:
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Ultra-low RMS output noise keeps your sensitive circuits safe.
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High PSRR helps you keep voltage steady in hard places.
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Reverse current protection stops damage to your circuit.
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Thermal shutdown keeps the device from overheating.
Note: Use good capacitors and follow the PCB layout tips. This helps control noise and keeps your lt3097 working well.
Thermal Info
Heat can change how well your lt3097 works. You need to control heat to keep it safe. The lt3097 does not waste much power as heat because of its low-dropout design. Still, you should watch the temperature when it is running. The thermal resistance depends on the package you use. For example, the 16-lead DFN package has about 40°C/W thermal resistance. The device will shut down if it gets too hot, which protects your circuit.
You can make thermal performance better by:
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Using a good PCB layout with lots of copper under the device.
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Not using long wires, which can make more heat.
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Keeping air moving around the device.
Reminder: Follow the layout tips and do not use long wires. This helps you control heat and noise in your design.
LT3097 Applications
Common Uses
You can use the lt3097 in many power supply projects. This device works well when you need both positive and negative voltages. It is often found in audio equipment. It helps lower unwanted noise in sound systems. You also see it in test and measurement tools. These tools need steady and clean power for good results. The lt3097 supports sensors in medical devices. It keeps signals clear and steady. You can use it in high-end instruments where low noise is important.
Here are some common uses for the lt3097:
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Audio preamplifiers and mixers
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Precision analog circuits
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Test and measurement equipment
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Medical imaging systems
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Industrial control systems
Tip: If your project needs quiet and steady power, the lt3097 linear regulator is a great choice.
Application Circuits
You can make many circuits with the lt3097. The most common way uses the device to make both positive and negative rails from one input. This makes your design simple and saves space on your board.
A basic circuit looks like this:
+-------------------+
Input -->| VIN VOUT+ |--> Positive Output
| |
| LT3097 |
| |
Ground-->| GND VOUT- |--> Negative Output
+-------------------+
You set the output voltages by picking the right resistors for the ADJ+ and ADJ- pins. You can add capacitors to lower noise even more. Some circuits use the shutdown pin to turn the regulator on or off. You can also use the error flag to check if your power supply is working well.
| Application Example | Benefit of LT3097 |
|---|---|
| Audio Preamps | Ultra-low noise for clear sound |
| Test Equipment | Stable dual rails for accuracy |
| Medical Devices | Clean power for sensitive sensors |
Always check the datasheet for more circuit examples. You will find tips for layout and picking parts to get the best results.
LT3097 Datasheet
Datasheet Link
You need the official datasheet to get the most out of the LT3097. The datasheet gives you all the technical details you need for your design. You can find the LT3097 datasheet on the Analog Devices website. Here is a quick way to access it:
Tip: Always download the latest version of the datasheet. Manufacturers sometimes update the datasheet with new information or corrections.
How to Use the Datasheet
The datasheet is your main guide when you work with the LT3097. You can use it to check pinouts, electrical specs, and application circuits. Here are some steps to help you use the datasheet:
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Start with the Features Table:
You will see a summary of what the LT3097 can do. This helps you decide if it fits your project. -
Check the Pinout Diagram:
The datasheet shows you where each pin goes. You can use this to connect the LT3097 correctly. -
Review Electrical Characteristics:
You will find tables with voltage, current, and noise values. These numbers help you plan your circuit. -
Look at Application Circuits:
The datasheet gives you sample circuits. You can use these as a starting point for your own design. -
Read the Layout Guidelines:
Good layout keeps noise low and heat under control. The datasheet gives you tips for best results.
If you follow the datasheet, you can avoid common mistakes and get the best performance from your LT3097.
You can also use the datasheet to find package options, thermal data, and protection features. The datasheet is a complete resource for your design work.
Low Noise Linear Regulator Comparison
LT3097 vs Other Regulators
When you choose a low noise linear regulator, you want to know how the LT3097 stands against other options. The LT3097 and LT3045 both offer very low output noise, only 0.8 μVrms from 10 Hz to 100 kHz. This means both keep your sensitive circuits quiet. You also care about power supply rejection ratio (PSRR). The LT3097 gives you 76 dB at 1 MHz for the positive rail and 74 dB at 1 MHz for the negative rail. The LT3045 offers more than 90 dB out to 10 kHz for the positive rail and over 70 dB out to 2.5 MHz for the negative rail.
You may need more current for your project. The LT3097 can supply up to 500 mA per channel, while the LT3045 gives you up to 200 mA. The LT3097 also supports both positive and negative outputs in one device, which saves space and makes your design easier.
Here is a quick comparison:
| Parameter | LT3097 | LT3045 |
|---|---|---|
| Output Noise | 0.8 μVrms (10 Hz to 100 kHz) | 0.8 μVrms (10 Hz to 100 kHz) |
| PSRR (Positive) | 76 dB at 1 MHz | >90 dB out to 10 kHz |
| PSRR (Negative) | 74 dB at 1 MHz | >70 dB out to 2.5 MHz |
| Output Current | 500 mA | 200 mA |
| Dropout Voltage | 260 mV (positive) | N/A |
| Output Voltage Range | 0 V to 15 V (positive) | N/A |
Note: The LT3097 gives you dual outputs and higher current. The LT3045 offers higher PSRR at lower frequencies.
Choosing the Right Regulator
You should pick a regulator that fits your project’s needs. If you need both positive and negative rails, the LT3097 is a strong choice. It works well in audio, test, and medical equipment. You get low noise and high current in one chip. If your design needs only a single output and the highest PSRR at low frequencies, the LT3045 may work better.
To choose the right regulator, ask yourself:
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Do you need dual outputs?
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How much output current do you need?
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Is ultra-low noise your top goal?
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Does your circuit need high PSRR at certain frequencies?
Think about your project’s power needs. The right regulator helps your circuit work better and last longer. Always check the datasheet for details before you decide.
Manufacturer and Support
About Analog Devices
Analog Devices makes many trusted electronic parts. Their products are in lots of high-tech devices. If you use an LT3097, you get a part from a company with a long history. Analog Devices is known for making reliable linear regulators. These parts help your circuits get steady and clean power.
Here is what Analog Devices does for electronics:
| Contribution | Description |
|---|---|
| Low-Dropout Regulators (LDOs) | Needed for stable and clean power in sensitive circuits. |
| Applications | Used in portable devices, RF circuits, and ADCs that need low noise and low power use. |
You can count on Analog Devices to make parts that engineers need. Their focus on quality and new ideas helps you build better things. Many people pick Analog Devices for projects that need good performance and low noise.
Note: Analog Devices has helped the electronics world for many years. You get their experience every time you use their products.
Support Resources
If you use the LT3097, you might need help or more details. Analog Devices gives you lots of support. You can find datasheets, notes, and design tools on their website. These tools help you fix problems and answer questions fast.
Here are some ways you can get help:
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Technical Documentation: Find datasheets, guides, and design examples.
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Online Forums: Ask questions and talk with other engineers.
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Design Tools: Use calculators and simulators for your circuit.
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Customer Support: Contact Analog Devices for help with your project.
If you want to learn more, you can watch their videos and webinars. These resources show you how to use the LT3097 in real projects.
If you have a question, ask for help. Analog Devices wants you to do well with your project. 🛠️
You get lots of good things with the lt3097 linear regulator. The lt3097 gives you two outputs. It has very low noise and high PSRR. You can use it for many different projects. Always look at the datasheet before you begin your design. If you need more help, you can use these tools:
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LT3097 Linear Regulator Product Highlights
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Evaluation Board EVAL-LT3097-AZ
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Technical Forums (TechForum)
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Webinars
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Scheme-it Design Tool
These tools help you do your best work with the lt3097.
Written by Jack Elliott from AIChipLink.
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