ST1S09 is a 2A, 1.5MHz PWM step-down switching regulator with synchronous rectification function from ST
The ST1S09 is a step-down DC-DC converter optimized for low output voltage applications, supplying over 2 A of current with an input voltage range of 2.7 V to 6 V. It features a high 1.5 MHz switching frequency to allow the use of tiny surface-mount components and includes an integrated synchronous rectifier to minimize external component count.
| Output current | 2 A |
|---|---|
| Switching frequency | 1.5 MHz |
| Input voltage range | 2.7 V to 6 V |
| Package | DFN6 (3 x 3 mm) |
| Operating junction temperature | -30 °C to 125 °C |
| Quiescent current | 1.5 mA |
The typical efficiency is greater than 90%.
The maximum duty cycle is 87%.
Yes, it has integrated output over-voltage protection.