Rainbow Electronics MAX1813 - Manual (Page 34)

MAX1813
Dynamically-Adjustable, Synchronous Step-Down
Controller with Integrated Voltage Positioning
34 ______________________________________________________________________________________
Figure 16. Adjusting V OUT with a Resistive-Divider
MAX1813
DH
LX
VPCS
PGND
DL
GND
FB
V OUT
C OUT
Q L
C FB
C VPCS
R VPCS
Q H
R4
R5
L1
R SENSE
V
OUT
= V
FB
(1 + R4/R5)
MAX1813
DH
LX
VPCS
PGND
DL
GND
REF
FB
V OUT
C OUT
Q 2
C FB
C VPCS
R VPCS
Q 1
R FB
R1
R2
R3
LOGIC
ADD0
ADD1
CONTROL
LOGIC
INH
R4
L1
R SENSE
C REF
MAX4634
Figure 17. Adding a Positive Offset Voltage