Datasheet
UG-057 Evaluation Board User Guide
Rev. 0 | Page 10 of 20
TYPICAL APPLICATION CIRCUITS
DUAL-INPUT, 300 kHz HIGH CURRENT APPLICATION CIRCUIT
MURATA: (HIGH VOLTAGE INPUT CAPACITORS)
22µF, 25V, X7R, 1210 GRM32ER71E226KE15L
PANASONIC: (OUTPUT CAPACITORS)
270µF (SP-SERIES) 4V, 7m EEFUE0G271LR
INFINEON MOSFETs:
BSC042N03MS G (BOTTOM)
BSC080N03MS G (TOP)
WURTH INDUCTORS:
1µH, 3.3m, 20A 7443552100
R5
100k
Q3 Q4
Q1 Q2
HIGH VOLTAGE INPUT
V
IN
= 12V
C12
100nF
V
OUT
= 1.8V, 15A
C3
22µF
C4
22µF
C5
22µF
C6
22µF
C7
22µF
C23
270µF
+
C22
270µF
+
C21
270µF
+
C20
270µF
+
1.0µH
R6
2
C13
1.5nF
R1 30k
R2
15k
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
C11
571pF
C10
57pF
R3
47k
C1
1µF
C2
0.1µF
LOW VOLTAGE INPUT
V
DD
= 5.0V
JP2
08548-088
JP3
Figure 27. Application Circuit for 12 V Input, 1.8 V Output, 15 A, 300 kHz (Q2/Q4 No Connect)
MURATA: (HIGH VOLTAGE INPUT CAPACITORS)
22µF, 25V, X7R, 1210 GRM32ER71E226KE15L
PANASONIC: (OUTPUT CAPACITORS)
270µF (SP-SERIES) 4V, 7m EEFUE0G271LR
INFINEON MOSFETs:
BSC042N03MS G (BOTTOM)
BSC080N03MS G (TOP)
WURTH INDUCTORS:
0.72µH, 1.65m, 35A 744325072
Q3 Q4
Q1 Q2
HIGH VOLTAGE INPUT
V
IN
= 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
2
C13
1.5nF
R1 30k
R2
15k
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
C11
800pF
C10
80pF
R3
33.5k
C1
1µF
C2
0.1µF
JP2
08548-090
JP3
Figure 28. Application Circuit for 13 V Input, 1.8 V Output, 20 A, 300 kHz (Q2/Q4 No Connect)
SINGLE-INPUT, 600 kHz APPLICATION CIRCUIT
MURATA: (HIGH VOLTAGE INPUT CAPACITORS)
22µF, 25V, X7R, 1210 GRM32ER71E226KE15L
PANASONIC: (OUTPUT CAPACITORS)
180µF (SP-SERIES) 4V, 10m EEFUE0G181XR
INFINEON MOSFETs:
BSC042N03MS G (BOTTOM)
BSC080N03MS G (TOP)
WURTH INDUCTORS:
0.47µH, 0.8m, 50A 744355147
R5
100k
Q3 Q4
Q1 Q2
HIGH VOLTAGE INPUT
V
IN
= 5.5V
C12
100nF
V
OUT
= 2.5V, 15A
C3
22µF
C4
22µF
C5
22µF
C6
22µF
C7
22µF
C22
180µF
+
C21
180µF
+
C20
180µF
+
0.47µH
R6
2
C13
1.5nF
R1 47.5k
R2
15k
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
C11
271pF
C10
27pF
R3
47k
C1
1µF
C2
0.1µF
JP2
08548-089
JP3
Figure 29. Application Circuit for 5.5 V Input, 2.5 V Output, 15 A, 600 kHz (Q2/Q4 No Connect)