Description
This demonstration board is based on the ST2S06A, a dual synchronous step-down DC-DC converter optimized for powering low-voltage digital cores in ODD applications and, generally, used to replace the high current linear solution when the power dissipation may cause a high heating of the application environment. It provides up to 0.5 A over an input voltage range of 2.5 V to 5.5 V. A high switching frequency (1.5 MHz) allows the use of tiny surface-mount components. A resistor divider to set the output voltage value, an inductor and two capacitors are required for every channel. In addition, a low output ripple is guaranteed by the current mode PWM topology and by the use of low ESR surface-mount ceramic capacitors. The demonstration board is thermal protected and current limited to prevent damage due to accidental short-circuit. STEVAL-ISA049V1

Features
■ Step-down current mode PWM (1.5 MHz) DC-DC converter
■ Fixed or adjustable output voltage from 0.8 V
■ 2% DC output voltage tolerance
■ Synchronous rectification
■ Reset function
■ Internal soft start for start-up current limitation and power ON delay of 50-100 µs
■ Typical efficiency: > 90%
■ 0.5 A output current capability
■ Non-switching quiescent current: max 1 mA over temperature range
■ RDS(on) 150 mΩ (typ.)
■ Uses tiny capacitors and inductors
■ RoHS compliant