The ST1S12 is a synchronous step-down DC-DC converter optimized for powering low-voltage digital cores in HDD applications.
The document details the ST1S12 family of adjustable current mode PWM synchronous step-down DC-DC converters. These devices are optimized for powering low-voltage digital cores in hard disk drive (HDD) applications, offering up to 0.7 A over an input voltage range of 2.5 V to 5.5 V with a fixed switching frequency of 1.7 MHz.
| Maximum Output Current | 0.7 A |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V |
| Switching Frequency | 1.7 MHz |
| Package Type | TSOT23-5L |
| Feedback Voltage | 0.6 V |
The device turns ON when the EN voltage is higher than 1.5 V.
The loop switches to short-circuit mode, reducing the maximum output limitation current to 300 mA.
The device works properly with X5R or X7R SMD ceramic capacitors.