LM3668
Description
The LM3668 is a synchronous buck-boost DC-DC converter optimized for powering low voltage circuits from a Li-Ion battery and input voltage rails between 2.5 V and 5.5 V. It has the capability to support up to 1-A output current over the output voltage range.
Key Features
- 1 45-µA Typical Quiescent Current
- 2.2-MHz PWM Fixed Switching Frequency (Typical)
- Automatic PFM-PWM Mode or Forced PWM Mode
- Wide Input Voltage Range: 2.5 V to 5.5 V
- Internal Synchronous Rectification for High Efficiency
- Internal Soft Start: 600-µs Maximum Start-Up Time After VIN Settled
- 0.01-µA Typical Shutdown Current
- Current Overload and Thermal Shutdown Protection
- Frequency Sync Pin: 1.6 MHz to 2.7 MHz
