This is the datasheet for the STEVAL-ISA055V1 0.7 A / 1.2 V synchronous buck converter. It provides detailed information about the features and characteristics of the converter.
The STEVAL-ISA055V1 is a demonstration board designed as a step-down current mode PWM DC-DC converter with an enable function. It utilizes the ST1S12XX family of synchronous converters, optimized for powering low-voltage digital cores in hard disk drive (HDD) applications and replacing high-current linear solutions to reduce heating.
The device provides up to 0.7 A output current over an input voltage range of 2.5 V to 5.5 V with a fixed output voltage of 1.2 V. It features a high switching frequency of 1.7 MHz, allowing the use of tiny surface-mount components such as inductors and low ESR ceramic capacitors.
| Output current capability | 0.7 A |
|---|---|
| Fixed output voltage | 1.2 V |
| DC output voltage tolerance | 3% |
| Switching frequency | 1.7 MHz |
| Input voltage range | 2.5 V to 5.5 V |
| Typical efficiency | > 90% |
| Quiescent current (max) | 600 uA |
The device provides up to 0.7 A over an input voltage range of 2.5 V to 5.5 V.
A high switching frequency of 1.7 MHz allows the use of tiny surface-mount components.
Only an inductor and 2 capacitors are needed for the 1.2 V and 1.8 V fixed version.