LTC4210-1_15 Datasheet, PDF (1/20 Pages) Linear Technology – Hot Swap Controller in 6-Lead SOT-23 Package

LTC4210-1/LTC4210-2
Hot Swap Controller in
6-Lead SOT-23 Package
FEATURES
s _{Allows Safe Board Insertion and Removal}
from a Live Backplane
s _{Adjustable Analog Current Limit}
with Circuit Breaker
s _{Fast Response Limits Peak Fault Current}
s _{Automatic Retry or Latch Off On Current Fault}
s _{Adjustable Supply Voltage Power-Up Rate}
s _{High Side Drive for External MOSFET Switch}
s _{Controls Supply Voltages from 2.7V to 16.5V}
s _{Undervoltage Lockout}
s _{Adjustable Overvoltage Protection}
s _{Low Profile (1mm) SOT-23 (ThinSOT}^TM_{) Package}
U
APPLICATIO S
s _{Hot Board Insertion}
s _{Electronic Circuit Breaker}
s _{Industrial High Side Switch/Circuit Breaker}
DESCRIPTIO
The LTC^®4210 is a 6-pin SOT-23 Hot Swap^TM controller
that allows a board to be safely inserted and removed from
a live backplane. An internal high side switch driver
controls the GATE of an external N-channel MOSFET for a
supply voltage ranging from 2.7V to 16.5V. The LTC4210
provides the initial timing cycle and allows the GATE to be
ramped up at an adjustable rate.
The LTC4210 features a fast current limit loop providing
active current limiting together with a circuit breaker
timer. The signal at the ON pin turns the part on and off and
is also used for the reset function.
This part is available in two options: the LTC4210-1 for
automatic retry on overcurrent fault and the LTC4210-2
for latch off on an overcurrent fault.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT and Hot Swap are trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Single Channel 5V Hot Swap Controller
BACKPLANE PCB EDGE
CONNECTOR CONNECTOR
(FEMALE) (MALE)
R_SENSE
Q1
V_IN
5V
LONG
0.01Ω
Si4410DY
V_OUT
R_X
+
5V
470µF ^4A
Z1
10Ω
OPTIONAL
C_X
C_LOAD
0.1µF
R_G
V_CC SENSE
100Ω
R_ON1
SHORT ^20k
R_ON2
10k
GATE
ON LTC4210
TIMER
R_C
100Ω
C_C
0.01µF
GND
GND
LONG
Z1: ISMA10A OR SMAJ10A
C_TIMER
0.22µF
GND
4210 TA01
Power-Up Sequence
C_LOAD = 470µF
V_ON
(2V/DIV)
V_TIMER
(1V/DIV)
V_OUT
(5V/DIV)
10ms/DIV
I_OUT
(0.5A/DIV)
4210 TA02
421012f
1