MAX1808EUB+ Maxim Integrated, MAX1808EUB+ Datasheet - Page 21

• Manufacturer Part Number: MAX1808EUB+
• Description: Current & Power Monitors & Regulators
• Manufacturer: Maxim Integrated

Figure 7 shows an application circuit for a +12V supply to drive the external MOSFETs and an auxiliary +5V supply
to power the device.
Figure 7. Operation with Auxiliary 5V Supply
Maxim Integrated
ENABLE
PGOOD
V
4.5V TO 5.5V
AUX
R
Low-Cost, Small, 4.5V to 28V Wide Operating
LIM
Range, DC-DC Synchronous Buck Controller
C4
C3
R3
C2
R1
IN
V
PGOOD
LIM
EN
COMP
FB
CC
MAX15026
Typical Application Circuits (continued)
R2
GND
DRV
BST
DH
DL
LX
RT
RT
C1
C
Auxiliary 5V Supply Operation
BST
+12V
V
IN
Q1
Q2
MAX15026
L1
C
F1
V
OUT
21