The LT1185 uses a saturation-limited NPN transistor as the pass element. This device gives the linear dropout characteristics of an 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.
LT1185 Pinout
LT1185 Pin Configuration
| Pin No | Pin Name |
|---|---|
| 1 | GND |
| 2 | FB |
| 3 | VIN |
| 4 | VOUT |
| 5 | REF |
LT1185 Key Features
- Dropout Voltage: 0.75V at 3A
- ±1% Reference Voltage
- Accurate Programmable Current Limit
- Shutdown Capability
- Internal Reference Available
- Standard 5-Lead Packages
- Full Remote Sense
- Low Quiescent Current: ≈2.5mA
You can download this datasheet for LT1185 3A Adjustable Low Drop-out Regulator – Datasheet from the link given below:
