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LTC4212CMS Datasheet

  • LTC4212CMS

  • Hot Swap Controller with Power-Up Timeout

  • 24頁

  • LINER

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LTC4212
Hot Swap Controller with
Power-Up Timeout
FEATURES
s
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
Allows Safe Board Insertion and Removal
from a Live Backplane
Controls Supply Voltages from 2.5V to 16.5V
Adjustable Soft-Start with Inrush Current
Limiting
Fast Turn-Off Time
No External Gate Capacitor is Required
Power Good Input with Adjustable Timer and
Glitch Filter
Power-Up Timeout Circuit Interfaces with External
Supply Monitors
Dual Level Overcurrent Fault Protection
Automatic Retry or Latched Mode Operation
High Side Drive for an External N-Channel FET
MS10 Package
The LTC
廬
4212 is a 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 supply voltages
ranging from 2.5V to 16.5V. The LTC4212 provides soft-
start and inrush current limiting during the start-up
period. It features a power-up timeout circuit that discon-
nects the system supply when the onboard supplies do not
enter into regulation within an adjustable timeout period.
The controller interfaces with external supply monitor ICs
or directly with the PGOOD pin of a DC/DC converter. After
normal power-up, a programmable power good glitch
filter can be enabled to filter out short term dips in the
supplies.
Two current limit comparators provide dual level
overcurrent circuit breaker protection. The slow com-
parator trips at V
CC
鈥?50mV and activates in 18碌s. The fast
comparator trips at V
CC
鈥?150mV and typically responds
in 500ns.
The LTC4212 can be configured for both latchoff and
autoretry applications and is available in a 10-pin MSOP
package.
APPLICATIO S
s
s
s
Electronic Circuit Breaker
Hot Board Insertion and Removal
Self-Isolating Hot Swap Boards
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
EDGE
BACKPLANE
CONNECTOR CONNECTOR
(MALE)
(FEMALE)
V
CC
5V
Z1
10鈩?/div>
100nF
10k
ON
10k
FAULT
20k
Hot Swap Controller with Power Good Function
0.007鈩?/div>
Si4410DY
+
10碌F
5V
+
LT1963-2.5
10碌F
+
10碌F
2.5V
1.5A
V
CC
SENSE
GATE
10k
+
10k
LT1963-3.3
10碌F
+
10碌F
3.3V
1.5A
LTC4212
FAULT
GND
TIMER
PGI
PGT
PGF
2.1k
0.01碌F
GND
Z1 = SMAJ10A (TVS)
4.7nF
270pF
V
CC3
V
CCA
LTC1727-2.5
COMP2.5 V
CC25
COMP3
COMP A GND
4212 TA01a
U
Power-Up Waveforms
ON
5V/DIV
TIMER
1V/DIV
PGT
1V/DIV
PGI
5V/DIV
U
U
5ms/DIV
4212f
1

LTC4212CMS 產(chǎn)品屬性

  • LTC4212

  • 50

  • 集成電路 (IC)

  • PMIC - 熱交換

  • -

  • 熱交換控制器

  • 通用

  • 無

  • -

  • 2.5 V ~ 16.5 V

  • 0°C ~ 70°C

  • 表面貼裝

  • 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）

  • 10-MSOP

  • 管件

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