LM3674

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design LM3674 SNVS405G – DECEMBER 2005 – REVISED APRIL 2015 LM3674 2-MHz, 600-mA Step-Down DC-DC Converter in SOT-23 1 Features 1 Input Voltage Range From 2.7 V to 5.5 V 600-mA Maximum Load Current Available in Fixed and Adjustable Output Voltages Ranging From 1 V to 3.3 V Operates From a Single Li-Ion Cell Battery Internal Synchronous Rectification for High Efficiency Internal Soft-Start 0.01-µA Typical Shutdown Current 2-MHz PWM Fixed Switching Frequency (typical) Current Overload Protection and Thermal Shutdown Protection 2 Applications Mobile Phones PDAs MP3 Players Portable Instruments W-LAN Digital Still Cameras Portable Hard Disk Drives 3 Description The LM3674 step-down DC-DC converter is optimized for powering low-voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.7 V to 5.5 V. It provides up to 600-mA load current over the entire input voltage range. There are several fixed output voltages and adjustable output voltage versions. The device offers superior features and performance for mobile phones and similar portable systems. During the Pulse Width Modulation (PWM) mode, the device operates at a fixed-frequency of 2 MHz (typical). Internal synchronous rectification provides high efficiency during the PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (t...