| UM1660DA | PFM Mode Step-up DC-DC Converter with 400mA Peak Current Limit | ACTIVE | 1 | 2 | 6 | | 28 | 0.4 | 1000 | Inductive | 20 | 8 | Boost | 0 | 1 | 90 | -40 to 85 | 6/DFN6L 2.0×2.0 | Y | |
| UM1660S | PFM Mode Step-up DC-DC Converter with 400mA Peak Current Limit | ACTIVE | 1 | 2 | 6 | | 28 | 0.4 | 1000 | Inductive | 20 | 8 | Boost | 0 | 1 | 90 | -40 to 85 | 5/SOT23 | Y | |
| UM1661 | PFM Mode Step-up DC-DC Converter with 1.6A Peak Current Limit | ACTIVE | 4 | 2 | 6 | | 24 | 1.5 | 2000 | Inductive | 20 | 32 | Boost | 0 | 1 | 85 | -40 to 85 | 6/SOT23 | Y | |
| UM1663S | PWM Mode Step-up DC-DC Converter with 38V/1.0A MOSFET | ACTIVE | 1 | 2.8 | 5.5 | | 36 | 1 | 1000 | Inductive | 30 | 10 | Boost | 93 | 1 | 90 | -40 to 85 | 6/SOT23 | | |
| UM1664S | Step-up DC-DC Converter with Light Load Mode | PREVIEW | 1 | 2 | 6 | | 32 | 0.4 | 1000 | Inductive | 20 | 8 | Boost | 0 | 1 | 90 | -40 to 85 | 5/SOT23 | | |
| UM1666DA | PFM Mode Step-up DC-DC Converter with 600mA Peak Current Limit | ACTIVE | 1 | 2 | 6 | 0 | 28 | 0.6 | 1000 | Inductive | 20 | 8 | Boost | 0 | 1 | 90 | -40 to 85 | 6/DFN6L 2.0×2.0 | Y | |
| UM1666S | PFM Mode Step-up DC-DC Converter with 600mA Peak Current Limit | ACTIVE | 1 | 2 | 6 | 0 | 28 | 0.6 | 1000 | Inductive | 20 | 8 | Boost | 0 | 1 | 90 | -40 to 85 | 5/SOT23 | Y | |