Deleted Single-Input, 600 Khz Application Circuit Section And Figure 29; Typical Application Circuits; Dual-Input, 300 Khz High Current Application Circuit - Analog Devices ADP1872-EVALZ User Manual

UG-057

TYPICAL APPLICATION CIRCUITS

DUAL-INPUT, 300 kHz HIGH CURRENT APPLICATION CIRCUIT

LOW VOLTAGE INPUT
V = 5.0V
DD
C10
57pF
V
OUT
0.1µF
LOW VOLTAGE INPUT
V
DD
C10
80pF
V
OUT
0.1µF
JP2
C11 JP3 ADP1872/
571pF
ADP1873
R3
VIN BST
1
47kΩ
COMP/EN SW
2
R1 30kΩ
FB DRVH
3
R2
15kΩ
GND PGND
4
5 VDD DRVL
C2 C1
1µF
Figure 27. Application Circuit for 12 V Input, 1.8 V Output, 15 A, 300 kHz (Q2/Q4 No Connect)
= 5V
JP2
JP3
C11
ADP1872/
800pF
ADP1873
R3
VIN BST
1
33.5kΩ
COMP/EN SW
2
R1 30kΩ
FB DRVH
3
R2
15kΩ
GND PGND
4
VDD DRVL
5
C2 C1
1µF
Figure 28. Application Circuit for 13 V Input, 1.8 V Output, 20 A, 300 kHz (Q2/Q4 No Connect)
ADP1872-EVALZ/ADP1873-EVALZ User Guide
HIGH VOLTAGE INPUT
V = 12V
IN
C3
22µF
C12
100nF
Q1 Q2
10
9
1.0µH
8
R6
2Ω
270µF
Q3 Q4
7
C13
1.5nF
6
MURATA: (HIGH VOLTAGE INPUT CAPACITORS)
R5
22µF, 25V, X7R, 1210 GRM32ER71E226KE15L
100kΩ
PANASONIC: (OUTPUT CAPACITORS)
270µF (SP-SERIES) 4V, 7mΩ EEFUE0G271LR
INFINEON MOSFETs:
BSC042N03MS G (BOTTOM)
BSC080N03MS G (TOP)
WURTH INDUCTORS:
1µH, 3.3mΩ, 20A 7443552100
HIGH VOLTAGE INPUT
V = 13V
IN
C3
22µF
C12
100nF
Q1 Q2
10
9
0.8µH
8
R6
2Ω
270µF
Q3 Q4
7
C13
1.5nF
6
MURATA: (HIGH VOLTAGE INPUT CAPACITORS)
22µF, 25V, X7R, 1210 GRM32ER71E226KE15L
PANASONIC: (OUTPUT CAPACITORS)
270µF (SP-SERIES) 4V, 7mΩ EEFUE0G271LR
INFINEON MOSFETs:
BSC042N03MS G (BOTTOM)
BSC080N03MS G (TOP)
WURTH INDUCTORS:
0.72µH, 1.65mΩ, 35A 744325072
Rev. A | Page 10 of 20
C4 C5 C6 C7
22µF 22µF 22µF 22µF
V = 1.8V, 15A
OUT
+ + + +
C20 C21 C22 C23
270µF 270µF 270µF
C4 C5 C6 C7
22µF 22µF 22µF 22µF
V = 1.8V, 20A
OUT
+ + + +
C20 C21 C22 C23
270µF 270µF 270µF