Rainbow Electronics MAX1541 User Manual
Page 43
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MAX1540/MAX1541
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
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43
Figure 17. Voltage Positioning
MAX1540
MAX1541
C2
VOLTAGE-POSITIONED
OUTPUT (V
OUT(VPS)
)
C
OUT
INPUT (V
IN
)
+5V BIAS
SUPPLY
D
BST
C
BST
L1
R
SENSE
N
H
N
L
C
IN
V
CC
V
DD
FB
V
OUT(VPS)
= V
OUT(NO LOAD)
- R
SENSE
I
OUT
CSN_
OUT_
CSP_
GND
DL_
DH_
BST_
V+
C1
R1
LX_
D
L
Figure 18. Voltage-Positioning Transient Response
B
50mV/div
1.4
1.4
A
A. CONVENTIONAL CONVERTER
B. VOLTAGE-POSITIONED OUTPUT
VOLTAGE POSITIONING THE OUTPUT
V
OUT
ESR VOLTAGE STEP
(I
STEP
x R
ESR
)
CAPACITIVE SOAR
(dV/dt = I
OUT
/C
OUT
)
RECOVERY
CAPACITIVE SAG
(dV/dt = I
OUT
/C
OUT
)
I
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