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LM2717MT データシート(PDF) 1 Page - National Semiconductor (TI) |
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LM2717MT データシート(HTML) 1 Page - National Semiconductor (TI) |
1 / 12 page LM2717 Dual Step-down DC/DC Converter General Description The LM2717 is composed of two PWM DC/DC buck (step- down) converters. The first converter is used to generate a fixed output voltage of 3.3V. The second converter is used to generate an adjustable output voltage. Both converters fea- ture low R DSON (0.16 Ω) internal switches for maximum effi- ciency. Operating frequency can be adjusted anywhere be- tween 300kHz and 600kHz allowing the use of small external components. External soft-start pins for each enables the user to tailor the soft-start times to a specific application. Each converter may also be shut down independently with its own shutdown pin. The LM2717 is available in a low profile 24-lead TSSOP package ensuring a low profile over- all solution. Features n Fixed 3.3V output buck converter with a 2.2A, 0.16 Ω, internal switch n Adjustable buck converter with a 3.2A, 0.16 Ω, internal switch n Operating input voltage range of 4V to 20V n Input undervoltage protection n 300kHz to 600kHz pin adjustable operating frequency n Over temperature protection n Small 24-Lead TSSOP package Applications n TFT-LCD Displays n Handheld Devices n Portable Applications n Laptop Computers Typical Application Circuit 20078501 PRELIMINARY May 2005 © 2005 National Semiconductor Corporation DS200785 www.national.com |
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同様の説明 - LM2717MT |
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