UM960eb & UM960Leb User Manual
UC-08-M34 EN R1.0
Power Supply
7
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.
Vout=0.8*(1+16/5.1)=3.31V
Dropout Voltage: 170mV@1A
Output Rise Time
80ms
0805
0805
U2
TPS7A8101DRB
Figure 3-3 LDO Circuit
Notes:
The rated output current of LDO should be more than twice the current of the
module.
R20 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.
R21 is a resistor connected in parallel with LDO. After removing R20 and
soldering R21, you can use external VIN to power the module.
When using the LDO to power the module, you should consider the power
dissipation of the LDO.