The LMS8117A device is a series of low-dropout voltage regulators with a dropout of 1.2 V at 1 A of load current. The device has the same pinout as the LM317.
The LMS8117A is available in an adjustable version, which can set the output voltage from 1.27 V to 13.8 V with only two external resistors. In addition, the device is also available in two fixed voltages, 1.8 V and 3.3 V.
The LMS8117A offers current limiting and thermal shutdown. The device circuit includes a Zener trimmed band-gap reference to assure output voltage accuracy to within ±1%.
The LMS8117A is available in SOT-223 and TO-252 D-PAK packages. A 10-µF (minimum) tantalum capacitor is required at the output to improve the transient response and stability.
| Output options | Adjustable Output, Fixed Output |
| Iout (max) (A) | 1 |
| Vin (max) (V) | 15 |
| Vin (min) (V) | 2.5 |
| Vout (max) (V) | 13.75 |
| Vout (min) (V) | 1.5 |
| Fixed output options (V) | 1.8, 3.3 |
| Noise (µVrms) | 412.5 |
| Iq (typ) (mA) | 5 |
| Thermal resistance θJA (°C/W) | 56 |
| Rating | Catalog |
| Load capacitance (min) (µF) | 10 |
| Regulated outputs (#) | 1 |
| Accuracy (%) | 3 |
| PSRR at 100 KHz (dB) | 37 |
| Dropout voltage (Vdo) (typ) (mV) | 1200 |
| Operating temperature range (°C) | 0 to 125 |
| SOT-223 (DCY) | 4 | 45.5 mm² 6.5 x 7 |
| TO-252 (NDP) | 3 | 65.2078 mm² 6.58 x 9.91 |
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