LM3670 Description
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. There are several different fixed voltage output options available as well as an adjustable output voltage version.
LM3670 Key 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
- 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