Texas Instruments LM3673
The LM3673 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 350-mA load current over the entire input voltage range. The device offers superior features and performance for mobile phones and similar portable systems.| Part No. | LM3673 |
|---|---|
| Datasheet | LM3673 Download |
| Manufacturer |  Texas Instruments |
| Description | 350-mA Step-Down DC-DC Converter |
| Buy | Stock & Price |
FEATURES
●1 16-µA Typical Quiescent Current● 350-mA Maximum Load Capability
● 2-MHz PWM Fixed Switching Frequency (Typical)
● Automatic PFM/PWM Mode Switching
● Available in Fixed and Adjustable Output Voltages
● Internal Synchronous Rectification for High Efficiency
● Internal Soft Start
● 0.01-µA Typical Shutdown Current
● Operates From a Single Li-Ion Cell Battery
● Current Overload and Thermal Shutdown Protection
● Only Three Tiny Surface-Mount External Components Required (One Inductor, Two Ceramic Capacitors) 2
APPLICATIONS
● Mobile Phones● PDAs
● MP3 Players
● W-LAN
● Portable Instruments
● Digital Still Cameras
● Portable Hard Disk Drives 3
DESCRIPTION
There are several different fixed voltage output options available, as well as an adjustable output voltage version ranging from 1.1 V to 3.3 V. The LM3673 uses intelligent automatic switching between pulse width modulation (PWM) and pulse frequency modulation (PFM) for better efficiency. During PWM mode, the device operates at a fixed-frequency of 2 MHz (typical).
