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LM3674MF-1.5 데이터시트(PDF) 1 Page - Texas Instruments |
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1 / 25 page 1 2 5 4 3 VIN SW FB EN GND L1:2.2 PH VOUT COUT 10 PF CIN 4.7 PF LM3674 VIN 2.7V to 5.5V LM3674 www.ti.com SNVS405F – DECEMBER 2005 – REVISED MAY 2013 LM3674 2MHz, 600mA Step-Down DC-DC Converter in SOT-23 Check for Samples: LM3674 1 FEATURES DESCRIPTION The LM3674 step-down DC-DC converter is 2 • 600mA Max Load Current optimized for powering low voltage circuits from a • Input Voltage Range from 2.7V to 5.5V single Li-Ion cell battery and input voltage rails from • Available in Fixed and Adjustable Output 2.7V to 5.5V. It provides up to 600mA load current, Voltages Ranging from 1.0V to 3.3V over the entire input voltage range. There are several fixed output voltages and adjustable output voltage • Operates from a Single Li-Ion Cell Battery versions. • Internal Synchronous Rectification for High The device offers superior features and performance Efficiency for mobile phones and similar portable systems. • Internal Soft Start During PWM mode, the device operates at a fixed- • 0.01 µA Typical Shutdown Current frequency of 2 MHz (typ). Internal synchronous rectification provides high efficiency during Pulse • 2 MHz PWM Fixed Switching Frequency (typ) Width Modulation (PWM) mode operation. In • 5-Pin SOT-23 Package shutdown mode, the device turns off and reduces • Current Overload Protection and Thermal battery consumption to 0.01 µA (typ). Shutdown Protection The LM3674 is available in a 5-pin SOT-23 package in leaded (PB) and lead-free (NO PB) versions. A APPLICATIONS high switching frequency of 2 MHz (typ) allows use of • Mobile Phones only three tiny external surface-mount components, an inductor and two ceramic capacitors. • PDAs • MP3 Players • Portable Instruments • W-LAN • Digital Still Cameras • Portable Hard Disk Drives TYPICAL APPLICATION CIRCUITS Figure 1. 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 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2005–2013, 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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