MAX1540A Datasheet, PDF (24/49 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
*V+
TON
MAX1540A/MAX1541
SKIP
LSAT
ILIM1
CSP1
CSN1
CURRENT
LIMIT 1
(FIGURE 5)
CURRENT
LIMIT 2
(FIGURE 5)
ILIM2
CSP2
CSN2
BST1
DH1
LX1
*VDD
DL1
GND
**CC1
**REFIN1
VALLEY
CURRENT
LIMIT
ZERO SATURATION
CROSSING
LIMIT
PWM
CONTROLLER 1
(FIGURE 3)
INT FB1 INT REF1
INTERNAL
MAX1540A/MAX1541
OPTION
SATURATION ZERO
VALLEY
LIMIT
CROSSING CURRENT
LIMIT
FAULT1 FAULT2
PWM
CONTROLLER 2
(FIGURE 3)
INT FB2
INT REF2
2.0V
REF
13R
0.7V
7R
FB1
OUT1
FB1 DECODE
(FIGURE 10)
FB2 DECODE
(FIGURE 10)
BST2
DH2
LX2
*VDD
DL2
GND
REF
VCC
FB2
OUT2
ON1
PGOOD1
POWER-GOOD AND
FAULT PROTECTION 1
(FIGURE 9)
POWER-GOOD AND
FAULT PROTECTION 2
(FIGURE 9)
ON2
PGOOD2
**FBLANK
**OD
**GATE
QUAD-LEVEL
DECODE AND
TIMER
BLANK
MAX1541
CONTROLLER 1
ONLY
*FOR THE MAX1540A:
LDOIN IS CONNECTED TO V+.
LDOOUT IS CONNECTED TO VDD.
**MAX1541 CONTROLLER ONLY.
Figure 2. MAX1540A/MAX1541 Functional Diagram
ENABLE OVP
ENABLE UVP
QUAD-LEVEL
DECODE
LINEAR REGULATOR
(FIGURE 13)
OVP/UVP
*LDOIN
*LDOOUT
**FBLDO
LDOON
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