NB650/NB650H – 6A, 28V, FAST-TRANSIENT, SYNCHRONOUS STEP-DOWN CONVERTERS
TYPICAL APPLICATION
R3
4.7
3
11
17
BST
SW
IN
V
IN
R7
205k
1, 2
FREQ
R5
100k
V
OUT
C7
1nF
NB650
NB650H
R1
12.1k
5
8
EN
13
FB
VCC
R6
100k
R2B
143k
R2A
16.5k
R2C
73.2k
R10
R11
14
15
1Meg
1Meg
RFB2
RFB1
4
PG
6
VID1
VID2
16
7
SS
C6
100nF
SW1
PGND
9, 10
GND
12
Figure 12: Typical Application Circuit with No External Ramp
VIN = 12V, VOUT = 1.05/1.15/1.20V, IOUT = 6A, fSW = 550kHz
R3
4.7
3
11
17
BST
SW
IN
V
IN
R7
205k
1, 2
FREQ
R5
100k
V
OUT
C4
R4
C7
1nF
NB650
NB650H
274k
330pF
R9
0
R1
12.1k
5
8
EN
13
FB
VCC
R6
100k
R2B
140k
R2A
16k
R2C
69.8k
R10
R11
14
15
1Meg
1Meg
RFB2
RFB1
4
PG
6
VID1
VID2
16
7
SS
C6
100nF
SW1
PGND
9, 10
GND
12
Figure 13: Typical Application with Low-ESR Ceramic Capacitor
VIN = 12V, VOUT = 1.05/1.10/1.15/1.20V, IOUT = 6A, fSW = 550kHz
NB650/NB650H Rev. 1.12
10/11/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
17