MPQ28261 – 21V, 3A, 500kHz SYNCHRONOUS STEP-DOWN CONVERTER
U1
R5
20
VIN
1
6
VIN
IN
BST
SW
C1B
C4
C1A
L1
C3
SW
MPQ28261
5.0V/3A
VCC
2,3,4,5
SW
VOUT
C2C
11
VCC
VCC
VOUT
GND
C2A
C2B
C6
R6
0
R4
15pF
100k
GND
EN
FB
EN
FB
8
7
9
EN
PG
FB
SS
C5
NS
R8
24k
R1
R7
51
R3
20k
10k
R9
100k
10
R2
1.36k
C7
47nF
PG
SS
PG
SS
Figure 10: VOUT = 5V
MPQ28261 Rev. 1.12
10/10/2013
www.MonolithicPower.com
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