The TPS61027DRCR is a 96% Efficient Boost Converter with LDO down-mode. It provides a power supply solution for products powered by a one-cell, two-cell or three-cell alkaline, NiCd or NiMH or one-cell Li-ion or Li-polymer battery. Output currents can go as high as 200mA while using a single-cell alkaline battery and discharge it down to 0.9V. The device can also be used for generating 5V at 500mA from a 3.3V rail or a Li-ion battery. The boost converter is based on a fixed-frequency, pulse width modulation (PWM) controller using a synchronous rectifier to obtain maximum efficiency. At low load currents the converter enters the power save mode to maintain a 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 peak current in the boost switch is limited to a value of 800, 1500 or 1800mA depending on the version of the device.
96% Efficient synchronous boost converter
Output voltage remains regulated when input voltage exceeds nominal output voltage
25µA Typical device quiescent current
Fixed and adjustable output voltage options up to 5.5V
Power save mode for improved efficiency at low output power
This device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
