• 1.8V to 5.5V Input Voltage Range
• 1.2V to 5.5V Output Voltage Range
(Fixed and Adjustable)
• Up to 96% Efficiency
• Less than 50μA Quiescent Current
• Output Current at 3.3V:
Up to 1200mA in Buck Mode
(VIN = 3.6V to 5.5V)
Up to 800mA in Boost Mode (VIN > 2.4V)
• Real Buck, Boost and Buck-Boost Modes
• Automatic Mode Transition
• Auto PFM and Forced PWM Selectable
• External Clock Synchronization
• True Shutdown Function with Load Disconnect
• OTP Protection
• Available in a Green TDFN-3×3-10L Package

• Input Voltage Range: 1.8 V to 5.5 V
• Fixed and Adjustable Output Voltage
Options from 1.2 V to 5.5 V
• Up to 96% Efficiency
• 1200-mA Output Current at 3.3 V in Step-Down Mode
(VIN = 3.6 V to 5.5 V)
• Up to 800-mA Output Current at 3.3 V in Boost Mode
(VIN > 2.4 V)
• Automatic Transition Between Step-Down and Boost Mode
• Device Quiescent Current less than 50 μA
• Power-Save Mode for Improved Efficiency
at Low Output Power
• Forced Fixed Frequency Operation and
Synchronization Possible
• Load Disconnect During Shutdown
• Overtemperature Protection
• Available in a Small 3-mm × 3-mm
10-Pin VSON Package (QFN)
