STEVAL-ISA046V2
2 A / 3.3 V high-efficiency synchronous buck converter evaluation board based on the ST1S09 with inhibit
Data Brief
Features |
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■ Input voltage range: 2.7 V to 5.5 V |
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■ Output voltage: 3.3 V |
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■ Max Iout: 2 A |
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■ High internal switching frequency: 1.5 MHz |
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■ Inhibit function |
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■ Short-circuit protection |
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■ ST1S09I in the DFN6 3x3 package |
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Description |
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This evaluation board, based on the ST1S09I |
STEVAL-ISA046V2 |
family of synchronous step-down DC-DC |
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converters, is optimized for powering all low- |
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voltage applications and, generally, replaces high |
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current linear solutions when power dissipation |
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may cause high heating of the application |
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environment. It provides up to 2 A over an input |
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voltage range of 2.7 V to 5.5 V. |
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A high 1.5 MHz switching frequency allows the |
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use of tiny surface-mount components and in |
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addition to the resistor divider to set the output |
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voltage value, an inductor and two capacitors are |
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required. |
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The ST1S09I features an inhibit function. |
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A low output ripple is guaranteed by the current |
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mode PWM topology and by the use of low ESR |
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surface-mount ceramic capacitors. |
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The device is thermally protected and current |
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limited to prevent damage due to accidental short- |
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circuit. |
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The ST1S09 family is available in the DFN6 3x3 |
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package. |
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March 2008 |
Rev 1 |
1/4 |
For further information contact your local STMicroelectronics sales office. |
www.st.com |
Circuit schematic |
STEVAL-ISA046V2 |
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