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XRP7662 Datasheet, PDF (8/19 Pages) Exar Corporation – 12A 300KHz Synchronous Step Down Regulator
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XRP7 66 2
Pow er Blox TM
1 2 A 3 0 0 KHz Sy n ch r on ou s St ep Dow n Reg u lat or
L1 , 1.0uH, 2mOhm
LX
IHLP-5050FD-1R0
1.2V, 0-12A
VOUT
1 PGND
LX 26
CZ2 RZ2
820pF 15k
2 PGND
3 PGND
4 PGND
LX 25
LX 24
LX 23
CP1
5
GND
22
VCC
DNP
6 VFB
UVIN 21
CF1
100pF
CSS 47nF 7 COMP U1
GND 20
8
19
SS XRP7662 GND
R8 237k
9 GND
VIN 18
10
17
ISN
BST
C9
6.8nF
11 ISP
12 SWN
LX 16
LX 15
13
VIN
14
LX
ISN
ISP
LX
Rs1 Cs1
D1
DNP
R3
5.11k
R4
5.11k
C4 0.1uF
R9 DNP
R12
0 Ohm
ISP ISN
CVCC
4.7uF
RZ3
18.2k
CZ3
220pF
C8 C10
R6
R7 DNP DNP
DNP
DNP
C5 C6 C7
100uF 100uF 680uF
R11
0.5k
R1
68.1k
GND
R2
137k
0 Ohm
RBST
CBST
DBST
SD101AWS
22nF
Note: 1. C7 is SANYO POSCAP 4TPE680MI 680uF/18mOhm/4V
Rs2 Cs2
2. All other capacitors are ceramic
VIN 5.5V
1 Ohm 2.2nF 1 Ohm 2.2nF
GND
C3 C2 C1
47uF 47uF 47uF
Fig. 16 : 5.5V IN test circuit
L1 , 1.0uH, 2mOhm
LX
IHLP-5050FD-1R0
1.2V, 0-12A
VOUT
1 PGND
LX 26
CZ2 RZ2
820pF 15k
2 PGND
3 PGND
4
PGND
LX 25
LX 24
23
LX
CP1
5 GND
VCC 22
DNP
6 VFB
UVIN 21
CF1
100pF
7
CSS 47nF
COMP U1
20
GND
8 SS
XRP7662 GND 19
R8 237k
9
GND
18
VIN
10 ISN
BST 17
C9
6.8nF
11 ISP
12
SWN
LX 16
15
LX
13 VIN
LX 14
ISN
ISP
LX
Rs1 Cs1
D1
DNP
R3
5.11k
R4
5.11k
C4 0.1uF
R12
DNP
R9 DNP
ISP ISN
CVCC
4.7uF
RZ3
18.2k
CZ3
220pF
R6
DNP
C8
R7 DNP
DNP
C10
DNP
C5
C6
C7
100uF 100uF 680uF
R11
0.5k
R1
68.1k
GND
R2
137k
0 Ohm
RBST
CBST
DBST
SD101AWS
22nF
Rs2 Cs2
Note: 1. C7 is SANYO POSCAP 4TPE680MI 680uF/18mOhm/4V
2. All other capacitors are ceramic
VIN 12V
1 Ohm
2.2nF 1 Ohm 2.2nF
GND
C3
C2
C1
22uF 22uF 22uF
Fig. 17 : 12V IN test circuit
© 2012 Exar Corporation
8/ 19
Rev. 2. 2.0
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