Datasheet
ADP1850 Data Sheet
Rev. A | Page 28 of 32
VCCO
VCCO
150kΩ
EN1
SYNC
100nF
TO
VIN
150kΩ
VIN
VCCO
VDL
AGND
FREQ
EN2
SW1
DH1
PGND1
DL1
DL2
PGND2
DH2
SW2
TRK2
FB2
COMP2
RAMP2
SS2
PGOOD2
ILIM2
BST2
TRK
1
FB
1
COMP1
RAMP1
SS1
PGOOD1
ILIM1
BST1
ADP1850
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
28kΩ
33pF
560pF
10kΩ
100pF
1.5nF
100nF
1µF
0.1µF
0.1µF
1µF
1µF
2.8kΩ
L2
M2B
M2A
22kΩ
COUT
2
CIN
2
V
OUT2
1.8V
5A
V
IN
2.8kΩ
L1
M1B
M1A
22kΩ
COUT
1
CIN
1
V
OUT1
5V
5A
V
IN
= 10V TO 20V
20kΩ10kΩ
CIN
1
, CIN
2
: 10µF/X5R/16V/1206 × 2, GRM31CR61C106KA88, MURATA
M1, M2: SI944DY OR BSON03MD
COUT
1
, COUT
2
: 22µF/XR5/1210/6.3V × 3, GRM32DR60J226KA01, MURATA
f
SW
= 750kHz, PULSE SKIP MODE
L1: 2µH, WURTH ELEKTRONIK, 744310200
L2: 1.15µH, WURTH ELEKTRONIK, 744310115
73.2kΩ
10kΩ
2Ω
2Ω
84.5kΩ
09440-045
Figure 45. Typical Low Current Operating Circuit