ncp3127 ON Semiconductor, ncp3127 Datasheet - Page 21

• Manufacturer Part Number: ncp3127
• Description: Ncp3127 2 A Synchronous Pwm Switching Converter
• Manufacturer: ON Semiconductor

GND_IN
GND_IN
VIN
VIN
Vin
Vin
470uF
16V
C3
2.94k
68n
330n
392
16V
50V
16V
50V
RC
RC
CC
CC
C1 10uF
C1 10uF
CP
820pF
50V
CP
NI
50V
C2
NI
16V
C2
10uF
16V
COMP
COMP
Figure 32. Ceramic Capacitor Application 12 V to 1.8 V 2 A
4
3
2
1
4
3
2
1
Figure 31. Standard Application 12 V to 2.5 V 2 A
AGND
COMP
FB
PGND
AGND
COMP
FB
PGND
NCP3127
NCP3127
U1
U1
ISET
ISET
VSW
VSW
BST
BST
VIN
VIN
RSET
RSET
21k
21k
5
6
7
8
5
6
7
8
http://onsemi.com
25V
25V
C11
C11
0.01uF
0.01uF
20R
20R
R3
R3
21
C10
1uF
25V
C10
1uF
25V
BST
BST
MMSD4148T1G
MMSD4148T1G
D1
D1
CBST
CBST
50V
10nF
50V
10nF
100R
100R
R9
R9
C9
1nF
25V
C9
1nF
25V
VSW
VSW
LOUT
C8
NI
LOUT
C8
NI
8.2uH
10uH
21.5k
12.7k
R1
R1
10k
10.2k
R2
R2
20R
20R
R4
R4
CF
1.2nF
10V
CF
1nF
10V
RF
20k
RF
3.01k
22uF
22uF
6.3V
6.3V
JX
FB
JX
FB
C4
C4
GND
GND
RCR
NI
C5
NI
150m
RCR
47uF
6.3V
6.3V
C5
C6
NI
C7
470uF
16V
CHF
820pF
50V
CHF
820pF
50V
VOUT
VOUT
Vout
GND
Vout
GND