2-2
2.1
EVM Schematic
Figure 2−1. EVM Schematic
1
2
3
4
5
10
9
8
7
6
C3, C8
1
µ
F
R2
1 M
Ω
(Not
Assembled)
Power
Good
V
O(OUT2)
PG
GND
C2−
C2+
OUT2
TPS60302
EN
C1−
VIN
C1+
OUT1
C2, C7
1
µ
F
U1
R2
1 M
Ω
C1, C6
1
µ
F
C4, C9
1
µ
F
C5, C10
1
µ
F
C11
C1206
X6
X5
GND
GND
X1
X3
X4
X2
VIN
0.9 V to 1.9 V
ENABLE
V
O(OUT1)
GND
For all necessary signals there are single-pin connectors on the board.
To operate the board, connect a power source with the appropriate voltage
level between VIN and GND.
A pullup resistor at EN was added to ensure that the device can start without
a signal applied to the EN pin. Connect EN to GND to disable the device. In
this state, the supply current of the IC decreases to 0.05
µ
A. When the EVM
is used in this mode, be aware that the pullup resistors R1 and R2 draw more
current than the device itself. When operating the device in this low-current
mode, these resistors must be removed.
Some additional GND pins have been added for convenience.
Capacitors C6 to C11 are 1206-size SMD footprints. These parts are not
necessary for operation and have only been added for test purposes. They can
be used as test points or to easily increase the value of a capacitor by adding
another one in parallel.