Texas Instruments LM3670
The LM3670 step-down DC-DC converter is optimized for powering ultralow voltage circuits from a single Li-Ion cell or three-cell NiMH/NiCd batteries. It provides up to 350-mA load current, over an input voltage range from 2.5 V to 5.5 V. The device offers superior features and performance for mobile phones and similar portable applications with complex power management systems.| Part No. | LM3670 |
|---|---|
| Datasheet | LM3670 Download |
| Manufacturer |  Texas Instruments |
| Description | Miniature Step-Down DC-DC Converter |
| Buy | Stock & Price |
FEATURES
●1 Input Voltage Range: 2.5 V to 5.5 V● Adjustable Output Voltages (VOUT): 0.7 V to 2.5 V
● Fixed Output Voltages: 1.2 V, 1.5 V, 1.6 V, 1.8 V, 1.875 V, 3.3V
● 15-µA Typical Quiescent Current
● 350-mA Maximum Load Capability
● 1-MHz PWM Fixed Switching Frequency (Typical)
● Automatic PFM and PWM Mode Switching
● Low Dropout Operation – 100% Duty Cycle Mode
● Internal Synchronous Rectification for High Efficiency
● Internal Soft Start
● 0.1-µA Typical Shutdown Current
● Current Overload Protection
● Operates from a Single Li-Ion Cell or Three-Cell NiMH/NiCd Batteries
● Only Three Tiny Surface-Mount External Components Required (One Inductor, Two Ceramic Capacitors) 2
APPLICATIONS
● Mobile Phones and Handheld Devices● PDAs
● Palm-Top PCs
● Portable Instruments
● Battery-Powered Devices Typical Application: Fixed Output VIN 2.5 V to 5.5 V CIN 4.7 µF VIN 1 L1 10 µF 5 SW LM3670 GND 2 VOUT COUT 10 µF EN 3 4 FB 3
DESCRIPTION
There are several different fixed voltage output options available as well as an adjustable output voltage version.
