TPS63020DSJR Datasheet

DC/DC Switching Regulators


The TPS63020DSJR 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 3A 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 4A. 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 14-pin QFN PowerPAD™ package measuring 3 × 4 mm (DSJ). TPS63020DSJR Features • Up to 96% Efficiency• 3A Output Current at 3.3V in Step Down Mode(VIN = 3.6V to 5.5V)• More than 2A Output Current at 3.3V in BoostMode (VIN > 2.5V)• Automatic Transition Between Step Down andBoost Mode• Dynamic Input Current Limit• Device Quiescent Current less than 50μA• Input Voltage Range: 1.8V to 5.5V• Fixed and Adjustable Output Voltage Optionsfrom 1.2V to 5.5V• Power Save Mode for Improved Efficiency at Low Output Power • Forced Fixed Frequency Operation at 2.4MHz and Synchronization Possible• Smart Power Good Output• Load Disconnect During Shutdown • Overtemperature Protection• Overvoltage Protection TPS63020DSJR Applications • All Two-Cell and Three-Cell Alkaline, NiCd or NiMH or Single-Cell Li Battery Powered Products• Ultra Mobile PCs and Mobile Internet Devices • Digital Media Players • DSCs and Camcorders• Cellular Phones and Smartphones • Personal Medical Products • Industrial Metering Equipment • High Power LEDs


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