Hardware Design Guide
Rev 3.0 Aug.19
16
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1.8V Boost to 3.3V Application
If you want to use the 3.3V’s GNSS module in a 1.8V system there are two
considerations: power supply translation and signal level shift. For power supply
translation, you can use a boost circuit which can boost 1.8V to 3.3V (refer to
below).
TPS61097A-33
is the TI’s boost IC which can support boost functionality. In its
application C1 and C2 need to use 10uF and L1 is 10uH. It can support
approximately 100mA of output. For information about the capacitor and
inductor’s placement, refer to the application note on the TI web site:
http://www.ti.com/lit/ds/symlink/tps61097a-33.pdf.
Figure 2-13: Application Schematic for TI Boost IC
Figure 2-14: Output Voltage vs Output Current