Gps1
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Contents
power management
- 3 to 4.2 LiPo (1.3 Ahr) - 26 hrs @ 50mA
- Need upower LV cutoff.
Battery charger
- LT3650-8.2 [[1]]
LCD display
- 5V @ 1.5mA
- TPS61220 boost converter - very efficient at lite load
LCD back light
- 3.8 - 4.2V @ 240mA max,
- LTC3454 - LED driver.
dsPICsupply
- 3.0V @ upto 100mA GPS
- TPS63030 (buck - boost)
GPS
- direct to LiPo,
- or through LDO - TPS780xx Iq=500nA, 150mA output.
- TPS735xx 25mW @ 50mA, 500mA max, IQ 46uA
- TPS734xx 25mV @ 50mA, 250mA IQ 44ua
- TPS799xx 25mV @ 50mA, 200mA, 40uA
- LOCOSYS LS20031/33 - direct Lipo connections! (41/44 mA)