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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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LM2734ZMKX Arkusz danych(PDF) 1 Page - National Semiconductor (TI) |
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LM2734ZMKX Arkusz danych(HTML) 1 Page - National Semiconductor (TI) |
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1 / 9 page  LM2734Z Thin SOT23 1A Load Step-Down DC-DC Regulator General Description The LM2734Z regulator is a monolithic, high frequency, PWM step-down DC/DC converter assembled in a 6-pin Thin SOT23 and LLP non pull back package. It provides all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area. With a minimum of external components and online design support through WEBENCH®™, the LM2734Z is easy to use. The ability to drive 1A loads with an internal 300m Ω NMOS switch using state-of-the-art 0.5µm BiCMOS technol- ogy results in the best power density available. The world class control circuitry allows for on-times as low as 13ns, thus supporting exceptionally high frequency conversion over the entire 3V to 20V input operating range down to the minimum output voltage of 0.8V. Switching frequency is internally set to 3MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is very high, efficiencies up to 85% are easy to achieve. External shutdown is included, featuring an ultra-low stand-by current of 30nA. The LM2734Z utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start cir- cuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output over-voltage protection. Features n Thin SOT23-6 package, or 6 lead LLP package n 3.0V to 20V input voltage range n 0.8V to 18V output voltage range n 1A output current n 3MHz switching frequency n 300m Ω NMOS switch n 30nA shutdown current n 0.8V, 2% internal voltage reference n Internal soft-start n Current-Mode, PWM operation n Thermal shutdown Applications n DSL Modems n Local Point of Load Regulation n Battery Powered Devices n USB Powered Devices Typical Application Circuit Efficiency vs Load Current V IN = 5V, VOUT = 3.3V 20130301 20130345 WEBENCH™ is a trademark of Transim. March 2005 © 2005 National Semiconductor Corporation DS201303 www.national.com |
Podobny numer części - LM2734ZMKX |
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Podobny opis - LM2734ZMKX |
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