The TPS61071-Q1 device provides a power supply solution for products powered by
lower-voltage DC rails or 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 75 mA, while using a single-cell
alkaline, and discharge down to 0.9 V. The device can also generate 5 V at 200 mA from a 3.3-V 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. The maximum peak
current in the boost switch is limited typically to a value of 600 mA.
The TPS61071-Q1 output voltage is programmed by an external resistor divider. To minimize
battery drain, disable the converter. During shutdown, the load disconnects from the battery. The
device package is a 6-pin thin SOT package (DDC).