Rainbow-electronics MAX17031 Manual do Utilizador descarregar pdf (Página 14)

MAX17031

Dual Quick-PWM Step-Down Controller with Low-

Power LDO and RTC Regulator for MAIN Supplies

14 ______________________________________________________________________________________

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

UVLO

FAULT2

3.3V LINEAR

REGULATOR

5V LINEAR

REGULATOR

RTC

REF

BYP

SECFB

FB1 SELECT

(PRESET 5V)

FB2 SELECT

(PRESET 3.3V)

POWER-GOOD

AND FAULT

PROTECTION

UVLO

PAD

MAX17031

Figure 2. Functional Diagram Overview

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 23 24

MAX17031 1

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