Datenblatt-Suchmaschine für elektronische Bauteile |
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LM2734Z Datenblatt(PDF) 1 Page - Texas Instruments |
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LM2734Z Datenblatt(HTML) 1 Page - Texas Instruments |
1 / 29 page LM2734 VIN VIN EN BOOST SW FB GND VOUT C3 L1 C1 C2 R1 R2 D1 D2 ON OFF LM2734Z www.ti.com SNVS334D – JANUARY 2005 – REVISED JUNE 2008 LM2734Z/LM2734ZQ Thin SOT23 1A Load Step-Down DC-DC Regulator Check for Samples: LM2734Z 1 FEATURES 23 • Thin SOT23-6 package, or 6 lead LLP package • LM2734ZQ is AEC-Q100 Grade 1 qualified and is manufactured on an Automotive Grade Flow • 3.0V to 20V input voltage range • 0.8V to 18V output voltage range APPLICATIONS • 1A output current • DSL Modems • 3MHz switching frequency • Local Point of Load Regulation • 300m Ω NMOS switch • Battery Powered Devices • 30nA shutdown current • USB Powered Devices • 0.8V, 2% internal voltage reference • Automotive • Internal soft-start • Current-Mode, PWM operation • Thermal shutdown 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 technology 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 circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output over-voltage protection. TYPICAL APPLICATION CIRCUIT 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 WEBENCH® is a trademark of Texas Instruments, Inc.. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2005–2008, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Ähnliche Teilenummer - LM2734Z_14 |
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Ähnliche Beschreibung - LM2734Z_14 |
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