Datasheet

Data Sheet ADP1877
Rev. D | Page 27 of 32
TYPICAL OPERATING CIRCUITS
VCCO
VCCO
VCCO
845kΩ
EN1
SYNC
100nF
TO
VIN
845kΩ
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
66.5kΩ
47pF
330p
F
36.5kΩ
47pF
680pF
100nF
1µF
0.1µF
0.1µF
1µF
1µF
R
ILIM2
4kΩ
L2
M4
M3
R
CSG2
4kΩ
COUT
22
COUT
21
CIN2
V
OUT2
1.8V
10A
VIN = 10V TO 14V, OR CAN BE CONNECTED
TO A SEPARATE POWER SUPPLY 5V
R
ILIM1
4kΩ
L1
M2
M1
R
CSG1
4kΩ
COUT
12
COUT
11
CIN1
V
OUT1
3.3V
10A
VIN = 10V TO 14V
R
TOP2
20kΩ
R
BOT2
10kΩ
CIN1, CIN2: 10µF/X7R/25V/1210 × 2, GRM32DR71E106KA12, MURATA
COUT
11
, COUT
21
: 330µF/6.3V/POSCAP × 2, 6TPF330M9L, SANYO
COUT
12
, COUT
22
: 22µF/X5R/0805/6.3V, GRM21BR60J226ME39, MURATA
f
SW
= 600kHz
L1, L2: 1.2µH, WURTH ELEKTRONIK, 744325120
M1, M2, M3, M4: IRLR7821
R
TOP1
45.3kΩ
R
BOT1
10kΩ
2Ω
08299-019
1MΩ
1MΩ
Figure 41. Typical Medium Current Operating Circuit