LT1117
LT1117
PRODUCTION800mA Low Dropout Positive Regulators Adjustable and Fixed 2.85V,3.3V, 5V
- Part Models
- 24
- 1ku List Price
- Starting From $2.93
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Overview
- Space Saving SOT-223 Surface Mount Package
- 3-Terminal Adjustable or Fixed 2.85V, 3.3V, 5V
- Output Current of 800mA
- Operates Down to 1V Dropout
- Guaranteed Dropout Voltage at Multiple Current Levels
- 0.2% Line Regulation Max
- 0.4% Load Regulation Max
The LT1117 is a positive low dropout regulator designed to provide up to 800mA of output current. The device is available in an adjustable version and fixed output voltages of 2.85V, 3.3V and 5V. The 2.85V version is designed specifically to be used in Active Terminators for the SCSI bus. All internal circuitry is designed to operate down to 1V input to output differential. Dropout voltage is guaranteed at a maximum of 1.2V at 800mA, decreasing at lower load currents. On chip trimming adjusts the reference/output voltage to within ± 1%. Current limit is also trimmed in order to minimize the stress on both the regulator and the power source circuitry under overload conditions.
The low profile surface mount SOT-223 package allows the device to be used in applications where space is limited. The LT1117 requires a minimum of 10μF of output capacitance for stability. Output capacitors of this size or larger are normally included in most regulator designs.
Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the LT1117 flows into the load, increasing efficiency.
Applications
- Active SCSI Terminators
- High Efficiency Linear Regulators
- Post Regulators for Switching Supplies
- Battery Chargers
- 5V to 3.3V Linear Regulators
Documentation
Data Sheet 1
Application Note 2
Design Note 4
Brochure 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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT1117CM#PBF | 3-Lead DD Pak | ||
| LT1117CM#TRPBF | 3-Lead DD Pak | ||
| LT1117CM-2.85#PBF | 3-Lead DD Pak | ||
| LT1117CM-2.85#TRPBF | 3-Lead DD Pak | ||
| LT1117CM-3.3#PBF | 3-Lead DD Pak | ||
| LT1117CM-3.3#TRPBF | 3-Lead DD Pak | ||
| LT1117CM-5#PBF | 3-Lead DD Pak | ||
| LT1117CM-5#TRPBF | 3-Lead DD Pak | ||
| LT1117CST#PBF | 3-Lead SOT-223 | ||
| LT1117CST#TRPBF | 3-Lead SOT-223 | ||
| LT1117CST-2.85#PBF | 3-Lead SOT-223 | ||
| LT1117CST-2.85#TRPBF | 3-Lead SOT-223 | ||
| LT1117CST-3.3#PBF | 3-Lead SOT-223 | ||
| LT1117CST-3.3#TRPBF | 3-Lead SOT-223 | ||
| LT1117CST-5#PBF | 3-Lead SOT-223 | ||
| LT1117CST-5#TRPBF | 3-Lead SOT-223 | ||
| LT1117IST#PBF | 3-Lead SOT-223 | ||
| LT1117IST#TRPBF | 3-Lead SOT-223 | ||
| LT1117IST-2.85#PBF | 3-Lead SOT-223 | ||
| LT1117IST-2.85#TRPBF | 3-Lead SOT-223 | ||
| LT1117IST-3.3#PBF | 3-Lead SOT-223 | ||
| LT1117IST-3.3#TRPBF | 3-Lead SOT-223 | ||
| LT1117IST-5#PBF | 3-Lead SOT-223 | ||
| LT1117IST-5#TRPBF | 3-Lead SOT-223 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
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 |
||
| LT1117CM#PBF | PRODUCTION | |
| LT1117CM#TRPBF | PRODUCTION | |
| LT1117CM-2.85#PBF | PRODUCTION | |
| LT1117CM-2.85#TRPBF | PRODUCTION | |
| LT1117CM-3.3#PBF | PRODUCTION | |
| LT1117CM-3.3#TRPBF | PRODUCTION | |
| LT1117CM-5#PBF | PRODUCTION | |
| LT1117CM-5#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice 2
- LT1117 Demo Circuit - 5V Regulator with Improved Ripple Rejection (6-20V to 5V @ 800mA)
- LT1117 Demo Circuit - 5V Regulator with Shutdown (6-20V to 5V @ 800mA)
Models for the following parts are available in LTspice:
- LT1117
- LT1117-2.85
- LT1117-3.3
- LT1117-5
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.
Reference Designs
Part Used
Part Used
