Rainbow-electronics MAX15023 Manuel d'utilisateur télécharger pdf (Page 11)

MAX15023

Wide 4.5V to 28V Input, Dual-Output

Synchronous Buck Controller

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Functional Diagram

OSCILLATOR

ENABLE

LOGIC

VREF

EN1

ENABLE1

COMPARATOR

THERMAL

SHUTDOWN

BANDGAP

REFERENCE

STARTUP

BIAS

VREF

VREF = 0.6V

VREF

EN2

SGND

LIM2

LIM1

ENABLE2

COMPARATOR

UVLO

INTERNAL

VOLTAGE

REGULATOR

LIM

CURRENT

GENERATOR

MAX15023 GEN

VREF

CK2

CK1

ENABLE1 ENABLE2

VREF

CK2

LIM2

SGND LIM1

CK1

ENABLE1

REF

ENABLE2

DC-DC CONVERTER 2

DC-DC CONVERTER 1

SOFT-START/

STOP LOGIC

AND

HICCUP LOGIC

COMP2 BST2 DH2 PGND2

PGOOD2 FB2 DL2 LX2

MAX15023

VREF

0.925 x V

REF

CK1

FB1

DAC_VREF

PWM

COMPARATOR

RAMP

GENERATOR

BOOST

DRIVER

LOW-SIDE DRIVER

SINK

CURRENT-LIMIT

COMPARATOR

PGOOD

COMPARATOR

SOURCE

CURRENT-LIMIT

COMPARATOR

HIGH-

SIDE

DRIVER

PWM

CONTROL

LOGIC

RAMP

GATEP

HICCUP TIMEOUT

HICCUP

LIM1/20

LIM1/10

HICCUP

TIMEOUT

COMP1

BST1

DH1

LX1

DL1

PGND1

FB1

PGOOD1

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 26 27

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Rainbow-electronics MAX15023 Manuel d'utilisateur Page 11

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