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| Part Number | Description | Status | SubFamily | Regulated Outputs(.) | Vin(Min)(V) | Vin(Max)(V) | Vout(Min)(V) | Vout(Max)(V) | Iout(Max)(A) | Topology | Special Features | Frequency(kHz) | Operating Temperature Range (°C) | Pin/Package | EV Kit Available? | Datasheet |
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 | UM3500 | 600mA, 1.5MHz, Synchronous Step-Down DC-DC Converter | ACTIVE | Step-Down (Buck) Converter | 1 | 2.5 | 5.5 | 0.6 | 5.5 | 0.6 | Synchronous Buck | Enable | 1500 | -40 to 85 | 5/SOT23 | Y |  |
| UM3501 | 600mA, 1.2MHz, Synchronous Step-Down DC-DC Converter | ACTIVE | Step-Down (Buck) Converter | 1 | 2.5 | 5.5 | 0.6 | 5.5 | 0.6 | Synchronous Buck | Enable, Power Saving Mode | 1200 | -40 to 85 | 5/SOT23 | Y | |
| UM3501DA | 600mA, 1.2MHz, Synchronous Step-Down DC-DC Converter | ACTIVE | Step-Down (Buck) Converter | 1 | 2.5 | 5.5 | 0.6 | 5.5 | 0.6 | Synchronous Buck | Enable, Power Saving Mode | 1200 | -40 to 85 | 6/DFN6L 2.0×2.0 | Y | |
| UM3502QA | 600mA, 1.2MHz, Synchronous Step-Down DC-DC Converter | ACTIVE | Step-Down (Buck) Converter | 1 | 2.5 | 5.5 | 0.6 | 5 | 0.6 (VIN≥3V);
0.3 (VIN=2.5V) | Synchronous Buck | Enable, Pulse Skipping Mode, Integrated Inductor | 1200 | -40 to 85 | 24/QFN 4.0×4.0 | Y | |
| UM3503QA | 1A, 2.5V to 5.5V Input, Low Profile Power Module | ACTIVE | Step-Down (Buck) Converter | 1 | 2.5 | 5.5 | 1 | 5 | 1 | Synchronous Buck | Enable, Pulse Skipping Mode, Integrated Inductor | 2250 | -40 to 85 | 24/QFN 4.0×4.0 | Y | |
| UM3506QA | Low-Profile, 600mA, Synchronous Step-Down Converter with Integrated Inductor | ACTIVE | Step-Down (Buck) Converter | 1 | 2.5 | 5.5 | 0.6 | 5 | 0.6 | Synchronous Buck | Enable, Pulse Skipping Mode, Integrated Inductor | 2250 | -40 to 85 | 14/QFN 2.5×2.5 | | |
| UM3510DA | 1A, 2.25MHz, Synchronous Step-Down DC-DC Converter | ACTIVE | Step-Down (Buck) Converter | 1 | 2.5 | 6 | 0.6 | 6 | 1 | Synchronous Buck | Enable, Power Saving Mode, Fixed Frequency PWM Mode | 2250 | -40 to 85 | 6/DFN 2.0×2.0 | Y | |
| UM3510S | 1A, 2.25MHz, Synchronous Step-Down DC-DC Converter | ACTIVE | Step-Down (Buck) Converter | 1 | 2.5 | 6 | 0.6 | 6 | 1 | Synchronous Buck | Enable, Power Saving Mode, Fixed Frequency PWM Mode | 2250 | -40 to 85 | 6/SOT23 | Y | |
| UM5482S8 | 2A, 18V Synchronous Rectified Step-Down Converter | ACTIVE | Step-Down (Buck) Converter | 1 | 4.75 | 18 | 0.923 | 15 | 2 | Synchronous Buck | Enable,Internal Soft-Start,Under Voltage Lockout | 340 | -40 to 85 | 8/SOP | Y | |
| UM5483S | 2.5A, 18V Synchronous Rectified Step-Down Converter | PRELIMINARY | Step-Down (Buck) Converter | 1 | 4.75 | 18 | 0.8 | 15 | 2.5 | Synchronous Buck | Enable,Internal Soft-Start,Under Voltage Lockout | 340 | -40 to 85 | 6/SOT23 | | |
| UM5483SB | 2.5A, 18V Synchronous Rectified Step-Down Converter | PRELIMINARY | Step-Down (Buck) Converter | 1 | 4.75 | 18 | 0.8 | 15 | 2.5 | Synchronous Buck | Enable,Internal Soft-Start,Under Voltage Lockout | 340 | -40 to 85 | 6/SOT23 | | |
