LT3091
LT3091
RECOMMENDED FOR NEW DESIGNS–36V, 1.5A Negative Linear Regulator with Programmable Current Limit
- Part Models
- 28
- 1ku List Price
- Starting From $4.37
Viewing:
Overview
- Output Current: 1.5A
- Single Resistor Sets Output Voltage
- 50μA SET Pin Current: ±1% Initial Accuracy
- Programmable Current Limit
- Positive or Negative Output Current Monitor
- Parallelable for Higher Current and Heat Spreading
- Low Dropout Voltage: 300mV
- Low Output Noise: 18μVRMS (10Hz to 100kHz)
- Configurable as a 3-Terminal Floating Regulator
- Wide Input Voltage Range: –1.5V to –36V
- Rail-to-Rail Output Voltage Range: 0V to –32V
- Positive/Negative Shutdown Logic or UVLO
- Programmable Cable Drop Compensation
- Load Regulation: 1.2mV (1mA to 1.5A)
- Stable with 10μF Minimum Output Capacitor
- Stable with Ceramic or Tantalum Capacitors
- Thermally Enhanced 14-Lead 4mm × 3mm DFN, 16-Lead TSSOP, 7-Lead TO-220 and DD Packages
The LT3091 is a 1.5A, low dropout negative linear regulator that is easily paralleled to increase output current or spread heat on surface mounted boards. Designed with a precision current reference followed by a high performance rail-to-rail voltage buffer, this regulator finds use in applications requiring precision output, high current with no heat sink, output adjustability to zero and low dropout voltage. The device can also be configured as a 3-terminal floating regulator.
The LT3091 features fast transient response, high PSRR and output noise as low as 18μVRMS. The LT3091 generates a wide output voltage range (0V to –32V) while maintaining unity gain operation. This yields virtually constant bandwidth, load regulation, PSRR and noise, independent of the programmed output voltage.
The LT3091 supplies 1.5A at a typical dropout voltage of 300mV. Operating quiescent current is nominally 1.2mA and drops to << 1μA in shutdown. A single resistor adjusts the LT3091’s precision programmable current limit. The device’s positive or negative current monitor either sources a current (0.25mA/A) or sinks a current (0.5mA/A) proportional to output current. Built-in protection includes reverse output protection, internal current limit with foldback and thermal shutdown with hysteresis.
Applications
- Post Regulator for Switching Supplies
- Low Noise Instrumentation and RF Supplies
- Rugged Industrial Supplies
- Precision Power Supplies
Documentation
Data Sheet 1
User Guide 1
Technical Articles 2
Brochure 2
Analog Dialogue 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
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| LT3091EFE#PBF | PRODUCTION | |
| LT3091EFE#TRPBF | PRODUCTION | |
| LT3091HFE#PBF | PRODUCTION | |
| LT3091HFE#TRPBF | PRODUCTION | |
| LT3091IFE#PBF | PRODUCTION | |
| LT3091IFE#TRPBF | PRODUCTION | |
| LT3091MPFE#PBF | PRODUCTION | |
| LT3091MPFE#TRPBF | PRODUCTION | |
|
Aug 10, 2022 - 22_0175 Laser Top Mark Conversion for DDPAK & TO220 Packages Assembled in ADPG. Country of Origin Code [MY] To Be Incorporated On Top Mark |
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| LT3091ER#PBF | PRODUCTION | |
| LT3091ER#TRPBF | PRODUCTION | |
| LT3091ET7#PBF | PRODUCTION | |
| LT3091HR#PBF | PRODUCTION | |
| LT3091HR#TRPBF | PRODUCTION | |
| LT3091HT7#PBF | PRODUCTION | |
| LT3091IR#PBF | PRODUCTION | |
| LT3091IR#TRPBF | PRODUCTION | |
| LT3091IT7#PBF | PRODUCTION | |
| LT3091MPR#PBF | PRODUCTION | |
| LT3091MPR#TRPBF | PRODUCTION | |
| LT3091MPT7#PBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| LDO Linear Regulators 1 | ||
| LT3015 Series | 1.5A, Low Noise, Negative Linear Regulator with Precision Current Limit | |
| Parts | Product Life Cycle | Description |
|---|---|---|
| LT3090 | RECOMMENDED FOR NEW DESIGNS | –36V, 600mA Negative Linear Regulator with Programmable Current Limit |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT3091
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
