Datasheet

EVAL-ADP2105
Rev. 0 | Page 7 of 12
ORDERING INFORMATION
BILL OF MATERIALS
Table 1. Bill of Materials for ADP2105-1.8-EVAL
Description
Reference
Designator
Reference
Name
1
Qty. Manufacturer Part Number
Capacitor, MLCC, 4.7 μF, 10 V,
0805, X5R, SMD
C1, C2 C
IN1
, C
IN2
2 Murata GRM21BR61A475KA73L
Capacitor, MLCC, 22 μF, 6.3 V,
0805, X5R, SMD
C3, C4 C
OUT
2 Murata GRM21BR60J226ME39L
Capacitor, MLCC, 1 nF, 16 V,
0603, X7R, SMD
C5 C
SS
1
Vishay Vitramon or
equivalent
VJ0603Y102KXJA
Capacitor, MLCC, 39 pF, 50 V,
0603, NPO
C6 C
COMP
1
Vishay Vitramon or
equivalent
VJ0603Y390KXJA
Capacitor, MLCC, 0.1 μF, 25 V,
0603, X7R, SMD
C7
IN (filter
capacitor)
1
Vishay Vitramon or
equivalent
VJ0603Y104KXXA
Resistor, 274 kΩ, 1%, 0603, SMD R1 R
COMP
1
Vishay Dale or
equivalent
CRCW06032743FRT1
Resistor, 100 kΩ, 1%, 0603, SMD R2
EN (pull
down)
1
Vishay Dale or
equivalent
CRCW06031003FRT1
Resistor, 10 Ω, 1%, 0603, SMD R3
IN (filter
resistor)
1
Vishay Dale or
equivalent
CRCW060310R0FRT1
Resistor, 0 Ω, 1%, 0603, SMD R4 1
Vishay Dale or
equivalent
CRCW06030000ZSSF
Bottom Resistor of Voltage
Divider
2
R5
Inductor 3.3 μH, 3.9 mm ×
3.9 mm x 1.1 mm
L1 L 1
Coilcraft®, Toko®,
Cooper Bussmann
LLPS4012-332MLB 1098AS-
DE2812C-3.3uH,
SD3814-3.3uH
1.8 V, 1 A Step-Down DC-to-DC
Converter
U1 1 Analog Devices, Inc. ADP2105-1.8
Headers, 0.100, Single, Straight
V
OUT
, V
IN
, GND,
GND, J1, EN
12
Sullins Electronics or
equivalent
S1012-36-ND PTC36SAAN
1
Refer to the Typical Applications Circuit for Fixed Output Voltage Options figure in the ADP2105 data sheet.
2
Do not solder this component onto the board.
OUTPUT VOLTAGE: 1.8V
OUT
V
CC
OUT
R5
NS
C4
22µF
C3
22µF
R4
0Ω
V
CC
06312-002
C2
4.7µF
R1
274kΩ
C6
39pF
L1
3.3µH
C1
4.7µF
V
OUT
C5
1nF
2
GND
INPUT VOLTAGE: 2.7V TO 5.5V
R3
10Ω
V
IN
GND
SS
LX2
AGND PADDLECOMP
PGND
NC
OUT_SENSE PWIN1IN1GND4
LX1
PWIN2
12
11
10
9
16 15 14 13
5 6 7 17 8
EN
GND3
GND2
GND1
V
CC
R2
100kΩ
EN
J1
NC = NO CONNECT
1
U1
ADP2105-1.8
C7
0.1µF
1
2
3
4
Figure 9. Evaluation Board Schematic of ADP2105-1.8-EVAL with V
OUT
= 1.8 V