ST1S03A is a step down DC-DC converter optimized for powering low-voltage digital core in HDD applications and, generally, to replace the high current linear solution when the power dissipation may cause an high heating of the application environment.
The ST1S03A is a step-down current mode PWM DC-DC converter optimized for powering low-voltage digital cores in HDD applications. It features an internal 1.5A power switch and operates at a typical switching frequency of 1.5 MHz, allowing for the use of small surface-mount components. The device includes internal soft start, thermal protection, and cycle-by-cycle current limiting to prevent damage from short circuits.
| Output current | 1.5 A |
|---|---|
| Switching frequency | 1.5 MHz |
| Input voltage range | 3 V to 5.5 V |
| Quiescent current | 1.5 mA |
| Switch voltage drop | 200 mV |
| Package | DFN6D (3x3 mm) |
| Feedback voltage | 800 mV |
The ST1S03A provides up to 1.5 A of output current.
The device operates at a typical switching frequency of 1.5 MHz.
The regulator works over an input voltage range of 3 V to 5.5 V.
Yes, the device includes an inhibit function to control the power supply.