Datasheet

ADP1851 Data Sheet
Rev. 0 | Page 22 of 24
TYPICAL OPERATING CIRCUITS
Figure 34. 25 A Circuit Operating in Current Mode
Figure 35. 25 A Circuit Operating in Voltage Mode
M2
M1
V
IN
= 9V TO 15V
L
1
2
3
4
5 6 7 8
9
10
141516
12
FREQ
DL
SW
DH
SYNC
VIN
EN
VCCO
ADP1851
13
11
BST
SS/TRK
COMP
FB
RAMP PGOOD
ILIM
PGND
C
IN
C
OUT
EP
TO V
IN
1µF
2Ω
1µF
4.99kΩ
21kΩ
75pF
620pF
0.1µF
0.1µF
f
SW
= 600kHz
C
IN
: OS-CON 150µF/20V, 20SEP150M, SANYO + 2× CAP CER 10µF 25V X7R 1210, MURATA GRM32DR71E106KA12
L: 0.3µH COILCRAFT SER1408-301ME
M1: 2× INFINEON BSC052N03LS
M2: 2× INFINEON BSC0902NS
C
OUT
: 2× POSCAP 330µF/2.5V SANYO 2R5TPE330M7 + 2× CAP CER 47µF 10V X5R 1210 MURATA GRM32ER61A476KE20 L
2.49kΩ
1.15kΩ
V
OUT
1.8V
25A
140kΩ
2Ω
10595-030
TO
VCCO
M2
M1
V
IN
= 9V TO 15V
L
100kΩ
1
2
3
4
5 6 7 8
9
10
141516
12
FREQ
DL
SW
DH
SYNC
VIN
EN
VCCO
ADP1851
13
11
BST
SS/TRK
COMP
FB
RAMP PGOOD
ILIM
PGND
C
IN
C
OUT
EP
TO V
IN
1µF
2Ω
1µF
32.4kΩ
21.5kΩ
75pF
1600pF
0.1µF
0.1µF
f
SW
= 300kHz
C
IN
: OS-CON 150µF/20V, 20SEP150M, SANYO + CAP CER 10µF 25V X7R 1210, MURATA GRM32DR71E106KA12
L: 1µH COILCRAFT SER1412-102ME
M1: INFINEON BSC052N03LS
M2: INFINEON BSC0902NS
C
OUT
: POSCAP 330µF/6.3V SANYO 6TPE330MFL + CAP CER 22µF 10V X5R 1210 MURATA GRM32ER61A226KE20L
7.15kΩ
2.74kΩ
V
OUT
3.3V
25A
196kΩ
2kΩ
510pF
10595-031