Rainbow Electronics MAX5098A - Manual (Page 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
VL
CKO2
LDO
Q
S
R
0.2V 0.74V
0.8V
TRANSCONDUCTANCE
ERROR AMPLIFIER
f SW /4
FREQUENCY
CONTROL
PWM
COMPARATOR
CKO1
MAXIMUM DUTY-CYCLE
CONTROL
FB1
V L
VL
BST1/VDD1
IN_HIGH
ON/OFF
0.9V
PGND_
CURRENT
LIMIT
OSCILLATOR
MAIN
OSCILLATOR
GATE
OVERVOLTAGE
OVERVOLTAGE
STARTUP CIRCUIT/
PROTECTION CIRCUIT/
CHARGE PUMP
20V SHUNT
REGULATOR
1.8V
SGND
Q
BST2/VDD2
SOURCE2
FB2
PGND_
COMP2
CHARGE
PUMP
DIGITAL
SOFT-START
FREQUENCY
DIVIDER
MAX5098A