| Output options | Adjustable Output, Fixed Output |
| Iout (Max) (A) | 1.5 |
| Vin (Max) (V) | 29 |
| Vin (Min) (V) | 2.6 |
| Vout (Max) (V) | 27.5 |
| Vout (Min) (V) | 1.25 |
| Fixed output options (V) | 1.8, 2.5, 3.3, 5 |
| Noise (uVrms) | 38 |
| Iq (Typ) (mA) | 2 |
| Thermal resistance θJA (°C/W) | 23 |
| Rating | Catalog |
| Load capacitance (Min) (μF) | 10 |
| Regulated outputs (#) | 1 |
| Accuracy (%) | 2 |
| PSRR @ 100 KHz (dB) | 30 |
| Dropout voltage (Vdo) (Typ) (mV) | 1300 |
| Operating temperature range (C) | 0 to 125, -40 to 125 |
- Available in Fixed 1.8-V, 2.5-V, 3.3-V, 5-V
- Available in Adjustable Version
- Current Limiting and Thermal Protection
- 2% Output Accuracy
- Output Current 1.5 A
- Line Regulation 0.015% (Typical)
- Load Regulation 0.1% (Typical)
- Maximum Input Voltage up to 29V
- Minimum Adjustable Output Voltage Down to 1.25V
- Stable with Ceramic Output Capacitor with ESR
- Temperature Range : -40°C to 125°C
The LM1086 is a regulator with a maximum dropout of 1.5 V at 1.5 A of load current. The device has the same pin-out as TI?s industry standard LM317.
Two resistors are required to set the output voltage of the adjustable output voltage version of the LM1086. Fixed output voltage versions integrate the adjust resistors. Typically, no input capacitor is needed unless the device is situated more than 6 inches from the input filter capacitors. Output capacitor can be replaced with ceramic and appropriate ESR.
The LM1086 circuit includes a zener trimmed bandgap reference, current limiting, and thermal shutdown. Because the LM1086 regulator is floating and detects only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input-to-output differential is not exceeded. Exceeding the maximum input-to-output deferential will result in short-circuiting the output. By connecting a fixed resistor between the adjustment pin and output, the LM1086 can be also used as a precision current regulator.
For applications requiring greater output current, refer to LM1084 (clickable link) for the 5-A version, and the LM1085 (clickable link) for the 3-A version.
