Datasheet

MAX4271/MAX4272/MAX4273
3V to 12V Current-Limiting Hot-Swap Controllers
with Autoretry, DualSpeed/BiLevel Fault Protection
12 ______________________________________________________________________________________
Figure 2. MAX4273 Functional Diagram
MAX4273
6μA
V
IN
SLOW COMPARATOR
FAST COMPARATOR
6μA
2.45V
INPUT
UVLO
LOGIC
CONTROL
DISCHARGE
ENABLE
STAT
REF
REF
1.2V
AUXVCC
AUXVCC
GND
0.1V
0.6V
ON
LLMON
INC
V
OUT
R
SENSE
V
IN
C
SPD
N
Q1
GATE
CEXT
CEXT
SENSE
RTH
RTH
IN
OUTPUT
OVLO
0.1V
GATE
OVLO
ON COMPARATOR
RESET COMPARATOR
GATE DRIVE
V
FC,TH
= 50mV
V
FC,TH
= 200mV
V
FC,TH
=
50mV TO 750mV
150ms
DELAY
ON
V
IN
RISING
OUTC
V
IN
CTIM
CTIM
4μA
10μA
AUXVCC
V
IN
CTON
CTON
4μA
150ms
DELAY ON INC RISING
0.6V
CHARGE PUMP
1MHz