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SNVSA84A – APRIL 2015 – REVISED MAY 2015 LM3668-Q1 1-A, High-Efficiency Dual-Mode Single-Inductor Buck-Boost DC-DC Converter
1 Features 2 Applications 1 45-ВµA Typical Quiescent Current
Output Voltage Option 4.5 V or 5 V
– 1-A Maximum Load Current for
VIN = 3.9 V to 5.5 V
– 800-mA Maximum Load Current for
VIN = 3.4 V to 3.8 V
– 700-mA Maximum Load Current for
VIN = 3 V to 3.3 V
– 600-mA Maximum Load Current for
VIN = 2.7 V to 2.9 V
2.2-MHz PWM Fixed Switching Frequency
(Typical)
Automatic PFM-PWM Mode or Forced PWM
Mode
Wide Input Voltage Range: 2.7 V to 5.5 V
Internal Synchronous Rectification for High …