The SY20019 high-efficiency 1.5MHz synchronous step-down DC/DC regulator operates over a wide input voltage range of 2.5V to 5.5V, and can deliver an output current up to 1A. It integrates a main switch and a synchronous switch with very low RDS(ON) to minimize conduction loss. The 1.5MHz pseudoconstant switching frequency allows for small external inductor and capacitor values. The SY20019 uses constant-off-time and peak-current-mode control to achieve fast transient responses. It provides overcurrent and short-circuit protection. The SY20019 is available in a space-saving, low-profile SOT563 package.
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| 电源 | |
|---|---|
| Channel(#) | 1 |
| 交流 / 直流特性 | |
| Switching frequency (max)(kHz) | 1500 |
| Switching frequency (min)(kHz) | 1500 |
| Vref accuracy (±%) | 1.5 |
| 环境与封装 | |
| Operating temperature range(°C) | -40 to 125 |
| Package | SOT563 |
| 其他 | |
| Control mode | COT OFF+Ipeak |
| Duty cycle (max)(%) | 100 |
| Features | Power good, Output discharge |
| Iout (max) (A) | 1 |
| Iq (typ) (uA) | 55 |
| Operation mode | Auto PFM |
| Vin (max) (V) | 5.5 |
| Vin (min) (V) | 2.5 |
| Vout (max) (V) | 5 |
| Vout (min) (V) | 0.6 |