LTC4210-4IS6#PBF Linear Technology, LTC4210-4IS6#PBF Datasheet

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LTC4210-4IS6#PBF

Manufacturer Part Number
LTC4210-4IS6#PBF
Description
Manufacturer
Linear Technology
Datasheet

Specifications of LTC4210-4IS6#PBF

Linear Misc Type
Positive Low Voltage
Package Type
TSOT-23
Operating Supply Voltage (min)
2.7V
Operating Supply Voltage (max)
7V
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Product Height (mm)
0.9mm
Product Length (mm)
2.9mm
Mounting
Surface Mount
Pin Count
6
Lead Free Status / RoHS Status
Compliant
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
GND
V
5V
IN
Allows Safe Board Insertion and Removal
from a Live Backplane
Adjustable Analog Current Limit
with Circuit Breaker
Fast Response Limits Peak Fault Current
Automatic Retry or Latch Off On Current Fault
Adjustable Supply Voltage Power-Up Rate
High Side Drive for External MOSFET Switch
Controls Supply Voltages from 2.7V to 7V
Undervoltage Lockout
Adjustable Overvoltage Protection
Low Profile (1mm) SOT-23 (ThinSOT
Hot Board Insertion
Electronic Circuit Breaker
Industrial High Side Switch/Circuit Breaker
CONNECTOR
BACKPLANE
(FEMALE)
CONNECTOR
PCB EDGE
(MALE)
U
Single Channel 5V Hot Swap Controller
LONG
SHORT
LONG
Z1: ISMA10A OR SMAJ10A
Z1
OPTIONAL
20k
U
10k
10Ω
TM
0.1µF
) Package
0.22µF
TIMER
ON
V
CC
LTC4210-3
R
0.01Ω
SENSE
GND
SENSE
GATE
Si4410DY
DESCRIPTIO
The LTC
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 7V. 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.
The LTC4210-3 retries on overcurrent fault and the
LTC4210-4 latches off on an overcurrent fault.
Q1
ThinSOT and Hot Swap are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
100Ω
100Ω
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
0.01µF
+
6-Lead SOT-23 Package
®
470µF
4210 TA01
Hot Swap Controller in
4210-3/LTC4210-4 is a 6-pin SOT-23 Hot Swap
V
5V
4A
GND
OUT
LTC4210-3/LTC4210-4
U
C
LOAD
= 470µF
Power-Up Sequence
10ms/DIV
4210 TA02
V
(2V/DIV)
V
(1V/DIV)
V
(5V/DIV)
I
(0.5A/DIV)
OUT
ON
TIMER
OUT
421034fa
1
TM

Related parts for LTC4210-4IS6#PBF

LTC4210-4IS6#PBF Summary of contents

Page 1

... An internal high side switch driver controls the GATE of an external N-channel MOSFET for a supply voltage ranging from 2.7V to 7V. The LTC4210 provides the initial timing cycle and allows the GATE to be ramped adjustable rate. The LTC4210 features a fast current limit loop providing active current limiting together with a circuit breaker timer ...

Page 2

... Input Voltage (ON) ..................................... –0.3V to 17V Output Voltage (GATE) ........ Internally Limited (Note 3) Operating Temperature Range LTC4210-3C/LTC4210-4C ....................... 0°C to 70°C LTC4210-3I/LTC4210-4I .................... – 40°C to 85°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are T ...

Page 3

... GATEUP –8 25°C –8 –9.0 CC –9.5 –10 –10.5 –11 –11.5 –12.0 4.5 5.0 150 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) LTC4210 • G05 UNITS µs µs µs 75 100 125 150 LTC4210 • G03 5.5 6.0 6.5 7.0 LTC4210 • G06 421034fa 3 ...

Page 4

... LTC4210 • G11 I (In Cool-Off Cycle) TIMERDN vs Supply Voltage 3 25°C 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 SUPPLY VOLTAGE (V) LTC4210 • G14 ∆V vs Temperature GATE –50 – ...

Page 5

... Supply Voltage 0. 25°C 0.23 0.22 0.21 0.20 0.19 0.18 0.17 0.16 150 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 SUPPLY VOLTAGE (V) LTC4210 • G18 ON Pin Threshold vs Temperature 1. 1.40 1.35 HIGH THRESHOLD 1.30 1.25 LOW THRESHOLD 1.20 1.15 1.10 1. 7.0 –75 – ...

Page 6

... GND (Pin 2): Ground Pin. ON (Pin 3): ON Input Pin. The ON pin comparator has a low-to-high threshold of 1.3V with 80mV hysteresis and a glitch filter. When the ON pin is low, the LTC4210 is reset. When the ON pin goes high, the GATE turns on after the initial timing cycle. ...

Page 7

... The LTC4210 is designed to turn a printed circuit board’s supply voltage ON and OFF in a controlled manner, allow- ing the circuit board to be safely inserted into or removed from a live backplane ...

Page 8

... The UVLO has a low-to-high threshold of 2.5V, a 100mV hysteresis and a high-to-low glitch filter of 30µs. Above 2.5V supply voltage, the LTC4210 will start if the ON pin conditions are met. A short supply dip below 2.4V for less than 30µs is ignored to allow for bus supply transients. ...

Page 9

... OMITTED FOR CLARITY **USE C IF 0.2µF < C Method 1 P OTHERWISE NOT REQUIRED R Q1 SENSE 0.007Ω Si4410DY SENSE LTC4210* 2.2nF 200Ω 4 GATE R C 100Ω 10nF (2b) 4210 F02 Method 2 Figure 2. Frequency Compensation ≤ C < 9µ OUT C L 421034fa ...

Page 10

... Initial Timing Cycle When the card is being inserted into the bus connector, the long pins mate first which brings up the supply V point 1 of Figure 3. The LTC4210 is in reset mode as the pin is low. GATE is pulled low and the TIMER pin is pulled low with a 100µ ...

Page 11

... During current limiting, the second term in Equation 10 is partly modified from CLOAD t STARTUP current (<10µA). (9) For successful completion of current limit start-up cycle there must be a net current to charge C current limit duration must be less than t second term in Equation 11 has to fulfill Equation 12. LTC4210-3/LTC4210 • GATE I GATE V V ...

Page 12

... The TIMER enters latchoff mode with a 5µA pull-up for the LTC4210-4 (latched-off version), while an autoretry “cool- off” cycle begins with a 2µA pull-down for the LTC4210-3 (autoretry version). An autoretry cool-off delay of the LTC4210-3 between COMP2 and COMP1 thresholds takes: ...

Page 13

... C1, the TIMER pin pulls down with approximately a 7k resistor to ground and a GATE start-up cycle is initiated. If the fault persists, the fault autoretry duty cycle is approximately 3.8%. Pulling the ON pin low for more than 30µs will stop the autoretry function and put the LTC4210 in reset mode ...

Page 14

... Hot Swap controller. Although wire harness, back- plane and PCB trace inductances are usually small, these can create spikes when currents are suddenly drawn, cut- off or limited. The transient associated with the GATE turn should be within the allowed LTC4210 G OUT , θ ...

Page 15

... U APPLICATIO S I FOR ATIO off can be controlled with a snubber and/or transient voltage suppressor. RC snubber networks are effective for LTC4210-3/LTC4210-4 applications. The choice usually determined experimentally. The value of the snubber capacitor is usually chosen between 10 to 100 times the MOSFET C . The value of the snubber resistor OSS is typically between 3Ω ...

Page 16

... 0.1µF D1 1N4148 TIMER ON1 18Ω 20k SHORT 3 LTC4210 ON2 1 10k TIMER C TIMER 0.22µF LONG Z1: SMAJ10A Z2: BZX84C6V2 Figure 11. Supply Side Overvoltage Protection COMMENTS Operates from 3V to 12V and Supports –12V Operates from 2.7V to 12V, Reset Output Operates from –10V to –80V Overvoltage Protection to 33V, Foldback Current Limiting 3.3V, 5V, Internal FETs for ± ...

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