Datasheet

Data Sheet ADP1872/ADP1873
Rev. B | Page 39 of 40
DUAL-INPUT, 300 kHz HIGH CURRENT APPLICATION CIRCUIT
MURATA: (HIGH VOLTAGE INPUT CAPACITORS)
22µF, 25V, X7R, 1210 GRM32ER71E226KE15 L
PANASONIC: (OUTPUT CAPACITORS)
270µF (SP-SERIES) 4V, 7mΩ EEFUE0G271LR
INFINEON MOSFETs:
BSC042N03MS G (LOWER-SIDE)
BSC080N03MS G (UPPER-SIDE)
WURTH INDUCTORS:
0.72µH, 1.65mΩ, 35A 744325072
Q3 Q4
Q1 Q2
HIGH VOLTAGE INPUT
VIN = 13V
LOW VOLTAGE INPUT
V
DD
= 5V
C12
100nF
V
OUT
= 1.8V, 20A
C3
22µF
C4
22µF
C5
22µF
C6
22µF
C7
22µF
C23
270µF
+
C22
270µF
+
C21
270µF
+
C20
270µF
+
0.8µH
R6
2Ω
C13
1.5nF
R1 30kΩ
R2
15kΩ
V
OUT
1
VIN
10
BST
2
COMP/EN
9
SW
3
FB
8
DRVH
4
GND
7
PGND
5
VDD
6
DRVL
ADP1872/
ADP1873
C
C
800pF
C
F
80pF
R
C
33.5kΩ
C1
1µF
C2
0.1µF
JP1
08297-090
Figure 91. Application Circuit for 13 V Input, 1.8 V Output, 20 A, 300 kHz (Q2/Q4 No Connect)