Datasheet

ADP2105/ADP2106/ADP2107 Data Sheet
Rev. D | Page 28 of 36
EVALUATION BOARD
EVALUATION BOARD SCHEMATIC FOR ADP2107 (1.8 V)
J1
U1
EN
VCC
INPUT VOLTAGE = 2.7V TO 5.5V
OUTPUT VOLTAGE = 1.8V, 2A
V
OUT
VIN
GND
OUT
VCC
OUT
21
GND
VCC
ADP2107-1.8
EN
SS
LX2
AGNDCOMP
PGND
GND
GND
GND
NCPADDLE
LX1
PWIN2
1
2
3
4
12
11
10
9
16
15
14 13
5 6
7 8
R2
100kΩ
C6
68pF
C5
1nF
R1
140kΩ
C2
10µF
1
L1
2
2µH
C3
22µF
1
C4
22µF
1
R4
0Ω
R5
NS
R3
10Ω
C7
0.1µF
C1
10µF
1
NC = NO CONNECT
06079-044
1
MURATA X5R 0805
10μF: GRM21BR61A106KE19L
22μF: GRM21BR60J226ME39L
2
2μH INDUCTOR D62LCB TOKO
FB
PWIN1INGND
Figure 53. Evaluation Board Schematic of the ADP2107-1.8 (Bold Traces are High Current Paths)
RECOMMENDED PCB LAYOUT (EVALUATION BOARD LAYOUT)
GROUND
GROUND
CONNECT THE GROUND RETURN OF
ALL POWER COMPONENTS SUCH AS
INPUT AND OUTPUT CAPACITORS TO
THE POWER GROUND PLANE.
POWER GROUND
PLANE
OUTPUT CAPACITOR
OUTPUT CAPACITOR
C
OUT
INPUT CAPACITOR
INPUT CAPACITOR
OUTPUT
V
OUT
C
IN
C
OUT
C
IN
JUMPER TO ENABLE
ENABLE
100kΩ PULL-DOWN
V
IN
INPUT
PLACE THE FEEDBACK RESISTORS AS
CLOSE TO THE FB PINAS POSSIBLE.
ADP2105/ADP2106/ADP2107
R
TOP
R
BOT
C
SS
R
COMP
C
COMP
PLACE THE COMPENSATION
COMPONENTS AS CLOSE TO
THE COMP PIN AS POSSIBLE.
ANALOG GROUND PLANE
CONNECT THE GROUND RETURN OF ALL
SENSITIVE ANALOG CIRCUITRY SUCH AS
COMPENSATION AND OUTPUT VOLTAGE
DIVIDER TO THE ANALOG GROUND PLANE.
LX
LX
PGND
INDUCTOR (L)
POWER GROUND
06079-045
Figure 54. Recommended Layout of Top Layer of ADP2105/ADP2106/ADP2107