• Product Introduction

TPS61028 

Adjustable 800mA switch, 96% efficient boost converter in a QFN-10 package with LDO buck mode

illustrate   The TPS6102x booster device provides a power solution for products powered by a single-cell, two-cell, or three-cell alkaline, nickel-cadmium or nickel-metal hydride battery, or a single-cell lithium-ion or lithium-polymer battery. The output current can be up to 200 mA, while using a single alkaline battery and releasing it to 0.9 V, it can also be used at 500 mA to produce 5 V from 3.3-V trains or a lithium-ion battery. The boost converter is based on a fixed frequency, pulse width modulation (PWM) controller that uses a synchronous rectifier for maximum benefit. Enter power-saving mode at the low-load current converter to maintain high efficiency over a wide load current range. Power saving mode can be disabled, forcing the converter to fix the switching frequency.   characteristic   96% efficient synchronous boost converter The output voltage remains regulated when the input voltage exceeds the rated output voltage Device Quiescent Current: 25μA (Typical) Input voltage range: 0.9 V to 6.5 V Fixed and adjustable output voltage up to 5.5 V options Power saving in low output power to improve efficiency mode Battery Low Voltage Comparator Low EMI converter (integrated anti-ringing switch) The load is disconnected during shutdown Over-temperature protection Small 3 mm × 3 mm QFN-10 packages apply All single-cell, dual-cell and triple-cell alkaline batteries, nickel-cadmium or nickel-metal hydride batteries or single-cell lithium battery-powered products Portable audio player handheld computer Cellular phones Personal medical products White LED camera flash