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LM2734 データシート(PDF) 1 Page - Texas Instruments |
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LM2734 データシート(HTML) 1 Page - Texas Instruments |
1 / 31 page LM2734 www.ti.com SNVS288I – SEPTEMBER 2004 – REVISED APRIIL 2013 LM2734 Thin SOT 1A Load Step-Down DC-DC Regulator Check for Samples: LM2734 1 FEATURES DESCRIPTION The LM2734 regulator is a monolithic, high frequency, 234 • Thin SOT-6 Package PWM step-down DC/DC converter in a 6-pin Thin • 3.0V to 20V Input Voltage Range SOT package. It provides all the active functions to • 0.8V to 18V Output Voltage Range provide local DC/DC conversion with fast transient response and accurate regulation in the smallest • 1A Output Current possible PCB area. • 550kHz (LM2734Y) and 1.6MHz (LM2734X) With a minimum of external components and online Switching Frequencies design support through WEBENCH®, the LM2734 is • 300m Ω NMOS Switch easy to use. The ability to drive 1A loads with an • 30nA Shutdown Current internal 300m Ω NMOS switch using state-of-the-art • 0.8V, 2% Internal Voltage Reference 0.5µm BiCMOS technology results in the best power density available. The world class control circuitry • Internal Soft-Start allows for on-times as low as 13ns, thus supporting • Current-Mode, PWM Operation exceptionally high frequency conversion over the • WEBENCH® Online Design Tool entire 3V to 20V input operating range down to the minimum output voltage of 0.8V. Switching frequency • Thermal Shutdown is internally set to 550kHz (LM2734Y) or 1.6MHz • LM2734XQ/LM2734YQ are AEC-Q100 Grade 1 (LM2734X), allowing the use of extremely small Qualified and are Manufactured on an surface mount inductors and chip capacitors. Even Automotive Grade Flow though the operating frequencies are very high, efficiencies up to 90% are easy to achieve. External APPLICATIONS shutdown is included, featuring an ultra-low stand-by current of 30nA. The LM2734 utilizes current-mode • Local Point of Load Regulation control and internal compensation to provide high- • Core Power in HDDs performance regulation over a wide range of • Set-Top Boxes operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, • Battery Powered Devices pulse-by-pulse current limit, thermal shutdown, and • USB Powered Devices output over-voltage protection. • DSL Modems • Notebook Computers • Automotive 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 registered trademark of Texas Instruments, Inc.. 3 WEBENCH is a registered trademark of Texas Instruments. 4 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2004–2013, 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. |
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