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IC REG BCK BST 5V 1.6A 10VSON
• Up to 96% Efficiency
• 1200-mA Output Current at 3.3V in Step Down Mode (VIN = 3.6V to 5.5V)
• Up to 800-mA Output Current at 3.3V in Boost Mode (VIN > 2.4V)
• Automatic Transition between Step Down and Boost Mode
• Device Quiescent Current less than 50µA
• Input Voltage Range: 1.8V to 5.5V
• Fixed and Adjustable Output Voltage Options from 1.2V to 5.5V
• Power Save Mode for Improved Efficiency at Low Output Power
• Forced Fixed Frequency Operation and Synchronization possible
• Load Disconnect During Shutdown
• Over-Temperature Protection
• Available in Small 3 mm × 3 mm, QFN-10 Package
• All Two-Cell and Three-Cell Alkaline, NiCd or NiMH or Single-Cell Li Battery Powered Products
• Portable Audio Players
• Cellular Phones
• Personal Medical Products
• White LEDs
The TPS6300x devices provide a power supply solution for products powered by either a two-cell or three-cell alkaline, NiCd or NiMH battery, or a one-cell Li-Ion or Li-polymer battery. Output currents can go as high as 1200 mA while using a single-cell Li-Ion or Li-Polymer Battery, and discharge it down to 2.5V or lower. The buck-boost converter is based on a fixed frequency, pulse-width-modulation (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 Power Save mode can be disabled, forcing the converter to operate at a fixed switching frequency. The maximum average current in the switches is limited to a typical value of 1800 mA. The output voltage is
programmable using an external resistor divider, or is fixed internally on the chip. The converter can be disabled to minimize battery drain. During shutdown, the load is disconnected from the battery. The device is packaged in a 10-pin QFN PowerPAD™ package measuring 3 mm × 3 mm (DRC).
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