MAX1540A Datasheet, PDF (21/49 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
+5V BIAS
SUPPLY
D_L1
L1
2.5μH
R_CS1
15mΩ
OUTPUT 1
1.8V, 4A (MAX)
C_OUT1
220μF
C1
22μF
D_BST
N_H1
C_BST1
0.1μF
N_L1
LDOOUT
V+
MAX1540A
DH1
DH2
BST1
BST2
LX1
DL1
CSP1
LX2
DL2
GND
CSP2
D_BST
N_H2
C_BST2
0.1μF
N_L2
CSN1
OUT1
FB1
SKIP
CSN2
OUT2
FB2
OVP/UVP
INPUT (V_IN)*
7V TO 20V
C_IN
(2) 10μF
D_L2
L2
2.2μH
R_CS2
5mΩ
C_OUT2
330μF
OUTPUT 2
2.5V, 8A (MAX)
REF
C_{REF (485kHz/355kHz)}
0.22μF
TON
REF
C3
470pF
R2
100kΩ
ILIM1
R3
49.9kΩ
C4
470pF
R4
200kΩ
R5
49.9kΩ
ILIM2
LSAT
LDOON
ON1
ON2
V_CC
PGOOD1
PGOOD2
EP
OPEN (I_LIM(VAL) x 1.75)
ON
R1
20Ω
C2
1μF
R6
100kΩ
OFF
+5V BIAS
SUPPLY
R7
100kΩ
POWER-GOOD
POWER GROUND
ANALOG GROUND
*LOWER INPUT VOLTAGES REQUIRE
ADDITIONAL INPUT CAPACITANCE.
SEE TABLE 1 FOR COMPONENT SPECIFICATIONS.
Figure 1. MAX1540A Standard Application Circuit
______________________________________________________________________________________ 21