| Model | Working current | Qquiescent current | Input voltage | Switching frequency | Output voltage | Package |
| LC51 A | 0.6 A | 3 mA | 8V~28V | 150 KHz | 5.1V ± 3% | SOP8 / DIP8 / QIPAI8/ QIPAI6 |
| LC51 B | 1 A | 3mA | 8V~28V | 150 KHz | 5.1V±3% | SOP8 / DIP8/ QIPAI8/ QIPAI6 |
| LC51E | 1.2 A | 3 mA | 8V~ 28V | 150 KHz | 5.1 V±3% | SOP8 / DIP8 / QIPAI8/ QIPAI6 |
| LC51 K | 1.5 A | 3 mA | 8V~28V | 150 KHz | 5.1V±3% | DIP8 |
| LC51 A1 | 0.6 A | 3 mA | 8V~28V | 150 KHz | 5.1V ± 3% | LDIP8 省5819 |
| LC51 A2 | 0.6 A | 3mA | 8V~28V | 150 KHz | 5.1V±3% | LDIP8 省5819+4007 |
| LC51 A4 | 0.6 A | 3 mA | 8V~28V | 150 KHz | 5.1V ± 3% | LDIP8 省整流桥 |
| LC51 B1 | 1 A | 3mA | 8V~28V | 150 KHz | 5.1V±3% | LDIP8 省5819 |
| LC51 B4 | 1 A | 3 mA | 8V~28V | 150 KHz | 5.1V ± 3% | LDIP8 省整流桥 |
| 34063 | 0.8-1.2-1.5A | 2 mA | 3V~36V | Adjustable | Adjustable | SOP8 / DIP8/ QIPAI8 |
