Rainbow-electronics MAX5098A Manual do Utilizador descarregar pdf (Página 13)

MAX5098A

Dual, 2.2MHz, Automotive Buck or Boost

Converter with 80V Load-Dump Protection

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Functional Diagram

CONVERTER 1

COMP1

PGOOD1

SOURCE1

DRAIN1

V+

BYPASS

FSEL_1

EN1

SYNC

OSC

VDRV

CKO

EN2

DRAIN2

PGOOD2

CONVERTER 2

CKO2

LDO

0.2V

0.74V

0.8V

TRANSCONDUCTANCE

ERROR AMPLIFIER

FREQUENCY

CONTROL

PWM

COMPARATOR

CKO1

MAXIMUM DUTY-CYCLE

CONTROL

FB1

BST1/VDD1

IN_HIGH

ON/OFF

0.9V

PGND_

CURRENT

LIMIT

OSCILLATOR

MAIN

OSCILLATOR

GATE

OVERVOLTAGE

STARTUP CIRCUIT/

PROTECTION CIRCUIT/

CHARGE PUMP

20V SHUNT

REGULATOR

1.8V

SGND

BST2/VDD2

SOURCE2

FB2

PGND_

COMP2

CHARGE

PUMP

DIGITAL

SOFT-START

FREQUENCY

DIVIDER

MAX5098A

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 27 28

MAX5098A 1

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