Gps1

power management

• 3 to 4.2 LiPo (1.3 Ahr
• will use 4.2V LDO to charge battery - ideally automotive safe
• 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
• LOCOSYS LS20031/33 - direct Lipo connections! (41/44 mA)