| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LP3994 |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |
| LP3994LD-1.5 |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |
| LP3994LD-1.8 |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |
| LP3994LDX-1.5 |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |
| LP3994LDX-1.8 |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |
| LP3994TL-1.5 |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |
| LP3994TL-1.5NOPB |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |
| LP3994TL-1.8 |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |
| LP3994TL-1.8NOPB |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |
| LP3994TLX-1.5 |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |
| LP3994TLX-1.5NOPB |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |
| LP3994TLX-1.8 |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |
| LP3994TLX-1.8NOPB |  253Kb/12P | 50mA CMOS Voltage Regulator with Enable Control |