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| MAX15026_11 Datasheet, PDF (19/23 Pages) Maxim Integrated Products – Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller | |||
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Low-Cost, Small, 4.5V to 28V Wide Operating
Range, DC-DC Synchronous Buck Controller
Typical Application Circuits
Single 4.5V to 28V Supply Operation
Figure 5 shows an application circuit for a single 4.5V to 28V power-supply operation.
4.5V TO 28V
VIN
PANASONIC
EEEFCIE331P
C1
330μF
PGOOD
ENABLE
C7
R3 C8
68pF 4.02kΩ 68pF
R1
11.8kΩ
C10
4.7μF
C9
0.022μF
IN
DH
MAX15026
VCC
LX
PGOOD
BST
LIM
DL
EN
DRV
COMP
GND
C3
0.47μF
R1*
C6
2.2μF
( ) Q1
ON-SEMICONDUCTOR
NTMFS4835NTIG
COILCRAFT
MSS1278-142ML
L1
VOUT
1.4μH
C4
C5
470μF
22μF
Q2
SANYO
4C54701
( ) ON-SEMICONDUCTOR
NTMFS4835NTIG
FB
R5
10kΩ
R6
15.4kΩ
RT
R4
27kΩ
R7
4.02kΩ
C11
1500pF
*R1 IS A SMALL-VALUE RESISTOR TO DECOUPLE
SWITCHING TRANSIENTS CAUSED BY THE
MOSFET DRIVER (2.2Ω).
Figure 5. VIN = 4.5V to 28V
______________________________________________________________________________________ 19
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