MAX8643 Maxim Integrated Products, MAX8643 Datasheet - Page 8
MAX8643
Manufacturer Part Number
MAX8643
Description
2MHz Step-Down Regulator
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX8643.pdf
(16 pages)
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www.DataSheet4U.com
3A, 2MHz Step-Down Regulator
with Integrated Switches
8
_______________________________________________________________________________________
COMP
REFIN
CTL1
CTL2
OUT
EN
SS
FB
8kΩ
CIRCUITRY
VOLTAGE-
CONTROL
VID
REFERENCE
SOFT-START
SHUTDOWN
GENERATOR
CONTROL
VOLTAGE
BIAS
COMP LOW
DETECTOR
AMPLIFIER
ERROR
SHUTDOWN
THERMAL
CIRCUITRY
0.9 x V
UVLO
V
DD
FB
REFIN
COMPARATOR
PWM
CURRENT-LIMIT
COMPARATOR
1V
P-P
CONTROL
SHDN
LOGIC
OSCILLATOR
MAX8643
ILIM THRESHOLD
IN
CHARGING SWITCH
BST CAPACITOR
LX
Block Diagram
FREQ
PWRGD
BST
IN
LX
PGND
GND
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