LT1185
LT1185
PRODUCTIONLow Dropout Regulator
- Part Models
- 12
- 1ku List Price
- Starting From $6.01
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Overview
- Low Resistance Pass Transistor: 0.25Ω
- Dropout Voltage: 0.75V at 3A
- ±1% Reference Voltage
- Accurate Programmable Current Limit
- Shutdown Capability
- Internal Reference Available
- Full Remote Sense
- Low Quiescent Current: 2.5mA
- Good High Frequency Ripple Rejection
- Available in 5-Lead TO-220 and DD Packages
The LT1185 is a 3A low dropout regulator with adjustable current limit and remote sense capability. It can be used as a positive output regulator with floating input or as a standard negative regulator with grounded input. The output voltage range is 2.5V to 25V, with ±1% accuracy on the internal reference voltage.
The LT1185 uses a saturation-limited NPN transistor as the pass element. This device gives the linear dropout characteristics of a FET pass element with significantly less die area. High efficiency is maintained by using special anti-saturation circuitry that adjusts base drive to track load current. The “on resistance” is typically 0.25Ω.
Accurate current limit is programmed with a single 1/8W external resistor, with a range of zero to three amperes. A second, fixed internal limit circuit prevents destructive currents if the programming current is accidentally over-ranged. Shutdown of the regulator output is guaranteed when the program current is less than 1µA, allowing external logic control of output voltage.
The LT1185 has all the protection features of our previous regulators, including power limiting and thermal shutdown.
Documentation
Data Sheet 1
Application Note 1
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 |
|---|---|---|---|
| LT1185CQ#PBF | 5-Lead DD Pak | ||
| LT1185CQ#TRPBF | 5-Lead DD Pak | ||
| LT1185CT#06PBF | 5-Lead TO-220 (Flow 06) | ||
| LT1185CT#30PBF | 5-Lead TO-220 (Flow 30) | ||
| LT1185CT#33PBF | 5-Lead TO-220 (Flow 33) | ||
| LT1185CT#PBF | 5-Lead TO-220 | ||
| LT1185IQ#PBF | 5-Lead DD Pak | ||
| LT1185IQ#TRPBF | 5-Lead DD Pak | ||
| LT1185IT#06PBF | 5-Lead TO-220 (Flow 06) | ||
| LT1185IT#30PBF | 5-Lead TO-220 (Flow 30) | ||
| LT1185IT#31PBF | 5-Lead TO-220 (Flow 31) | ||
| LT1185IT#PBF | 5-Lead TO-220 |
| 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 |
||
| LT1185CQ#PBF | PRODUCTION | |
| LT1185CQ#TRPBF | PRODUCTION | |
| LT1185CT#06PBF | PRODUCTION | |
| LT1185CT#30PBF | PRODUCTION | |
| LT1185CT#33PBF | PRODUCTION | |
| LT1185CT#PBF | PRODUCTION | |
| LT1185IQ#PBF | PRODUCTION | |
| LT1185IQ#TRPBF | PRODUCTION | |
| LT1185IT#06PBF | PRODUCTION | |
| LT1185IT#30PBF | PRODUCTION | |
| LT1185IT#31PBF | PRODUCTION | |
| LT1185IT#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 | |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT1185
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.