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STEVAL-ISA049V2 bảng dữ liệu(PDF) 1 Page - STMicroelectronics |
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1 / 4 page Data brief For further information contact your local STMicroelectronics sales office. July 2009 Doc ID 15977 Rev 1 1/4 4 STEVAL-ISA049V2 Synchronous dual buck converter with inhibit demonstration board based on the ST2S06B 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 ■ Inhibit 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 overtemperature range ■ RDS(on) 150 mΩ (typ.) ■ Uses tiny capacitors and inductors ■ RoHS compliant Description This demonstration board is based on the ST2S06B, 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 demoboard is thermal protected and current limited to prevent damage due to accidental short- circuit. STEVAL-ISA049V2 www.st.com |
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