Ldo Power Supply - unicore UT986 Hardware User Manual

UT986 Evaluation Board User Manual
3.1 3.3 V LDO Power Supply
VCC outputs 3.3 V voltage after passing through the LDO circuit to provide power to the
evaluation board.
080 5
Notes:
The rated output current of LDO should be more than twice the current of the

module.
R16 is a series resistor placed at the input of the LDO, which is used for

debugging. When selecting the resistor, choose one with high rated power to
ensure the current capability. Here, a 0805 0-ohm resistor is selected.
 R17 is a resistor connected in parallel with LDO. After removing R16 and
soldering R17, you can use an external power to supply the module
UC-08-M37 EN P1.0.0
U2
TPS7A8101DRB
Vout=0.8*(1+16/5.1)=3.31V
Dopout Voltage: 170mV@1A
Figure 3-3 LDO Circuit
Power Supply
080 5
7