Datasheet

Data Sheet ADP1850
Rev. A | Page 29 of 32
VCCO
VCCO
20kΩ
EN1
SYNC
100nF
TO
VIN
20kΩ
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
5.34kΩ
33pF
1.8n
F
8.66kΩ
33pF
1nF
100nF
1µF
0.1µF
0.1µF
1µF
1µF
4.99kΩ
L2
M4
M3
47kΩ
COUT
2
CIN
2
V
OUT2
1.8V
1.8A
V
IN
4.99kΩ
L1
M2
M1
47kΩ
COUT
1
CIN
1
V
OUT1
1.05V
1.8A
V
IN
= 3V TO 5.5V
20kΩ10kΩ
CIN
1
, CIN
2
: 4.7µF/X5R/16V/0805 × 2, GRM219R60J475KE19, MURATA
COUT
1
, COUT
2
: 22µF/XR5/0805/6.3V, GRM21BR60J226ME39, MURATA
f
SW
= 800kHz, PULSE SKIP MODE
L1, L2: 1µH, TOKO D62LCB1R0M
M1, M2, M3, M4: SI2302ADS, SOT23
7.5kΩ
10kΩ
5Ω
78.7kΩ
09440-046
Figure 46. Typical Low Current Application with V
IN
< 5.5 V