High-Accuracy Step-Down Controller
with Synchronous Rectifier for CPU Power
5V ±10%
V+
VL
VBATT
0.1µF
MAX798
DH
DL
VOUT
(VOUT (MAX) < 4.2V)
V+
DH
MAX798
DL
CSH
CSL
FB
GND
( ) VOUT = 1.6V
1 + –R–1–
R2
REMOTE
SENSE
LINES
MAIN
OUTPUT
R1
R2
Figure 4. Powering VL from a Separate +5V Supply
Figure 5. Adjusting the Output Voltage
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