| 제조업체 | 부품명 | 데이터시트 | 상세설명 |
 National Semiconductor ... | LM2991QML |  688Kb/13P | Negative Low Dropout Adjustable Regulator |
 National Semiconductor ... | LM2991J |  338Kb/ 11P | Negative Low Dropout Adjustable Regulator |
| LM2991J-QML |  338Kb/ 11P | Negative Low Dropout Adjustable Regulator |
| LM2991J-QML |  349Kb/ 12P | Negative Low Dropout Adjustable Regulator |
| LM2991J-QML |  688Kb/ 13P | Negative Low Dropout Adjustable Regulator |
| LM2991J-QMLV |  338Kb/ 11P | Negative Low Dropout Adjustable Regulator |
| LM2991J-QMLV |  349Kb/ 12P | Negative Low Dropout Adjustable Regulator |
| LM2991J-QMLV |  688Kb/ 13P | Negative Low Dropout Adjustable Regulator |
 National Semiconductor ... | LM2991S |  338Kb/ 11P | Negative Low Dropout Adjustable Regulator |
| LM2991S |  349Kb/ 12P | Negative Low Dropout Adjustable Regulator |