Datasheet

Data Sheet ADP1877
Rev. D | Page 29 of 32
VCCO
84.5kΩ
VCCO
698kΩ
EN1
SYNC
100nF
TO
VIN
698kΩ
VIN
VCCO
VDL
AGND
FREQ
EN2
SW1
DH1
PGND1
DL1
DL2
PGND2
DH2
SW2
TRK2
FB2
COMP2
RAMP2
SS2
PGOOD2
ILIM2
BST2
TRK1
FB1
COMP1
RAMP1
SS1
PGOOD1
ILIM1
BST1
ADP1877
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
22.6kΩ
68pF
820p
F
8.25kΩ
120pF
2.2nF
100nF
1µF
0.1µF
0.1µF
1µF
1µF
R
ILIM2
2.8kΩ
L2
M2B
M2A
R
CSG2
22kΩ
COUT2
CIN2
V
OUT2
1.8V
5A
VIN
R
ILIM1
2.8kΩ
L1
M1B
M1A
R
CSG1
22kΩ
COUT1
CIN1
V
OUT1
5V
5A
VIN = 10V TO 14V
R
TOP2
20kΩ
R
BOT2
10kΩ
CIN1, CIN2: 10µF/X5R/16V/1206 × 2, GRM31CR61C106KA88, MURATA
M1, M2: Si4944DY OR BSON03MD
COUT1: 22µF/X5R/1210/6.3V × 3, GRM32DR60J226KA01, MURATA
COUT2: 22µF/X5R/1210/6.3V × 3, GRM32DR60J226KA01, MURATA
f
SW
= 750kHz
L1: 2µH, 744310200, WURTH ELEKTRONIK
L2: 1.15µH, 744310115, WURTH ELEKTRONIK
R
TOP1
73.2kΩ
R
BOT1
10kΩ
3Ω
08299-021
1MΩ
1MΩ
Figure 43. Typical Low Current Operating Circuit