1 Features
• Input Voltage Range: 2.0 V to 16 V
• Output Voltage Range: 2.5 V to 9 V
• Up to 95% Efficiency
• +/- 1% dc accuracy in PWM mode
• +3% / -1% dc accuracy in PFM mode
• 2 A Output Current in Buck Mode
• 2 A Output Current in Boost Mode (VIN = 4 V; Vout = 5 V)
• Precise ENABLE input allows
– user defined undervoltage lockout
– exact sequencing
• Automatic Transition Between Step Down andBoost Mode
• Typical Device Quiescent Current: 50 μA
• Fixed and Adjustable Output Voltage Options
• Power Save Mode for Improved Efficiency at Low Output Power
• Forced Fixed Frequency Operation at 2.4 MHz and Synchronization Option
• Power Good Output
• VSEL simply allows output voltage change
• Load Disconnect During Shutdown
• Overtemperature Protection
• Input / Output Overvoltage Protection
• Available in QFN Package
2 Applications
• Dual LI-Ion Applications
• Industrial Metering Equipment
• DSC's and Camcorders
• Notebook Computers
• Ultra Mobile PC's and Mobile Internet Devices
• Personal Medical Products
3 Description
The TPS6307x is a high efficiency, low quiescent current buck-boost converter suitable for applications where the input voltage can be higher or lower than the output voltage. Output currents can go as high as 2 A in boost mode and in buck mode. The buck-boost converter is based on a fixed frequency, pulse-widthmodulation (PWM) controller using synchronous rectification to obtain maximum efficiency. At low load currents, the converter enters Power Save Mode to maintain high efficiency over a wide load current range. The converter can be disabled to minimize battery drain. During shutdown, the load is disconnected from the battery. The device is available in a 2.5 mm x 3 mm QFN package.
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