The ST1S10 is a high efficiency step-down PWM current mode switching regulator capable of providing up to 3 A of output current. The device operates with an input supply range from 2.5 V to 18 V and provides an adjustable output voltage from 0.8 V to 0.85*VIN_SW [VOUT = VFB*(1+R1/R2)]. It operates either at a 900 kHz fixed frequency or can be synchronized to an external clock (from 400 kHz to 1.2 MHz). The high switching frequency allows the use of tiny SMD external components, while the integrated synchronous rectification technology improves efficiency.
The ST1S10 is a high-efficiency monolithic synchronous step-down regulator IC capable of delivering up to 3 A of output current. It operates with an input voltage range from 2.5 V to 18 V and provides an adjustable output voltage from 0.8 V up to 85% of the input voltage. The device features a fixed switching frequency of 900 kHz or can be synchronized to an external clock ranging from 400 kHz to 1.2 MHz.
| Output current capability | 3 A |
|---|---|
| Switching frequency | 900 kHz (fixed) or 400 kHz to 1.2 MHz (sync) |
| Input voltage range | 2.5 V to 18 V |
| Output voltage range | 0.8 V to 0.85*VIN_SW |
| Typical efficiency | 90% |
| Stand-by supply current | max 6 µA |
| Operating junction temperature | -40 °C to 125 °C |
| Feedback voltage (typical) | 800 mV |
The device operates at a fixed 900 kHz frequency or can be synchronized to an external clock from 400 kHz to 1.2 MHz.
Yes, it features integrated synchronous rectification which eliminates the need for an external Schottky diode.
The ST1S10 provides up to 3 A of output current capability.