Rainbow Electronics MAX17031 - Manual (Page 14)

MAX17031
Dual Quick-PWM Step-Down Controller with Low-
Power LDO and RTC Regulator for MAIN Supplies
14 ______________________________________________________________________________________
2V
REF
DH2
BST2
LX2
DL2
DH1
BST1
LX1
DL1
PWM1
CONTROLLER
(FIGURE 3)
PWM2
CONTROLLER
(FIGURE 3)
ON1
ON2
ILIM2
OUT2
TON
ILIM1
OUT1
POWER-GOOD
AND FAULT
PROTECTION
FAULT1
SKIP
LDO5
GND
LDO BYPASS
CIRCUITRY
ONLDO
PGOOD
V DD
V DD
UVLO
FAULT2
3.3V LINEAR
REGULATOR
5V LINEAR
REGULATOR
RTC
REF
V DD
IN
BYP
SECFB
V CC
FB1 SELECT
(PRESET 5V)
V DD
FB2 SELECT
(PRESET 3.3V)
POWER-GOOD
AND FAULT
PROTECTION
UVLO
PAD
MAX17031
Figure 2. Functional Diagram Overview