The ST1S03 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. It provides up to 1.5A over an input voltage range of 3V to 16V. An high switching frequency (1.5MHz) allows the use of tiny surface-mount components: as well as the resistor divider to set the output voltage value, only an inductor, a schottky diode and two capacitors are required. Besides, a low output ripple is guaranteed by the current mode PWM topology and by the use of low E.S.R. SMD ceramic capacitors. The device is thermal protected and current limited to prevent damages due to accidental short circuit. The ST1S03 is available in DFN6 package.
The ST1S03 is an adjustable current mode PWM step-down DC/DC converter optimized for powering low-voltage digital cores in HDD applications and other high-current scenarios where linear solutions cause excessive heating. It features an internal 1.5A power switch, a switching frequency of 1.5MHz to allow the use of tiny surface-mount components, and operates over an input voltage range of 3V to 16V.
| Output Current | 1.5 A |
|---|---|
| Input Voltage Range | 3V to 16V |
| Package Type | DFN6 (3x3) |
| Efficiency | > 70% |
No, it is a complete regulator with internal compensation eliminating additional components.
The device provides up to 1.5A over an input voltage range of 3V to 16V.
The device has a power on delay ranging from 50 to 100 microseconds.