Texas Instruments LM3679
The LM3679 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.5V to 5.5V. It provides up to 350mA load current, over the entire input voltage range. The LM3679 output voltage can be configured to 1.2V, 1.5V, or 1.8V.| Part No. | LM3679 |
|---|---|
| Datasheet | LM3679 Download |
| Manufacturer |  Texas Instruments |
| Description | 350mA Miniature Step-Down DC-DC Converter |
| Buy | Stock & Price |
APPLICATIONS
(Height < 0.55mm) Check for Samples: LM3679FEATURES
1●2 16 µA Typical Quiescent Current
● 350 mA Maximum Load Capability
● 3 MHz PWM Fixed Switching Frequency (typ)
● Automatic PFM/PWM Mode Switching
● Available in 5-Bump DSBGA YZR Package and YPD Package
● 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
● Three External Components Required for Typical
APPLICATIONS
● Low Profile Solution (0.55mm Max Height, Includes Four External Components)APPLICATIONS
● Mobile Phones● PDAs
● MP3 Players
● W-LAN
● Portable Instruments
● Digital Still Cameras
● Portable Hard Disk Drives
DESCRIPTION
TYPICAL APPLICATION CIRCUIT VIN 2.5V to 5.5V CIN 4.7 PF VIN 1 L1: 1.0 PH 5 SW LM3679 GND 2 EN 3 4 FB VOUT COUT 10 PF Bill of Materials for Low Profile Solution: CIN = JMK107BJ475K (Taiyo - Yuden) COUT = JMK107BJ475K (Taiyo - Yuden) x2 Inductor = LQM21PN1R0MC0 (MuRata) Figure 1.
