MAX1540A Datasheet, PDF (43/49 Pages) Maxim Integrated Products – Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear Regulator

Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
R1
V_CC
C1
C2
V_DD
D_BST
V+
BST_
DH_
MAX1540A _{LX_}
MAX1541
DL_
N_H
C_BST
N_L
GND
FB
V_OUT(VPS) = V_{OUT(NO LOAD)} - R_SENSEI_OUT
Figure 17. Voltage Positioning
CSP_
OUT_
CSN_
+5V BIAS
SUPPLY
INPUT (V_IN)
C_IN
L1
D_L
R_SENSE
VOLTAGE-POSITIONED
OUTPUT (V_OUT(VPS))
C_OUT
VOLTAGE POSITIONING THE OUTPUT
1.4
A
1.4
B
50mV/div
A. CONVENTIONAL CONVERTER
B. VOLTAGE-POSITIONED OUTPUT
Figure 18. Voltage-Positioning Transient Response
ESR VOLTAGE STEP
(I_STEP x R_ESR)
CAPACITIVE SOAR
(dV/dt = I_OUT/C_OUT)
V_OUT
CAPACITIVE SAG
(dV/dt = I_OUT/C_OUT)
RECOVERY
I_LOAD
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