LTC4210-4 Linear Technology, LTC4210-4 Datasheet
LTC4210-4
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LTC4210-4 Summary of contents
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... TM ) Package The LTC4210-3 retries on overcurrent fault and the LTC4210-4 latches off on an overcurrent fault. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ThinSOT and Hot Swap are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...
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... 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 ...
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... TEMPERATURE (° Temperature GATE 100 125 7.0 –75 –50 – TEMPERATURE (°C) LTC4210-3/LTC4210-4 MIN TYP MAX = Undervoltage Lockout Threshold vs Temperature 2.65 2.60 2.55 V RISING CC 2.50 2.45 V FALLING 2.40 2.35 ...
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... LTC4210-3/LTC4210-4 www.DataSheet4U.com W TYPICAL PERFOR A CE CHARACTERISTICS I vs Temperature GATEUP –8.0 –8.5 –9.0 –9.5 –10 –10 –11 –11.5 –12 –75 –50 – 100 TEMPERATURE (°C) LTC4210 • G07 I (In Initial Cycle) TIMERUP vs Supply Voltage °C –1 – ...
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... TEMPERATURE (°C) ON Pin Threshold vs Supply Voltage 1. 25°C 1.40 1.35 HIGH THRESHOLD 1.30 1.25 LOW THRESHOLD 1.20 1.15 1.10 1.05 4.5 5.0 125 150 2.5 3.0 3.5 4.0 5.5 SUPPLY VOLTAGE (V) 4.5 5.0 5.5 6.0 6.5 7.0 LTC4210 • G22 LTC4210-3/LTC4210-4 TIMER Low Threshold vs Supply Voltage 0. 25°C 0.23 0.22 0.21 0.20 0.19 0.18 0.17 0.16 75 100 125 150 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) LTC4210 • G17 ON Pin Threshold vs Temperature 1. 1.40 1 ...
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... LTC4210-3/LTC4210-4 www.DataSheet4U.com W TYPICAL PERFOR A CE CHARACTERISTICS V vs Supply Voltage 25° 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE ( CTIO S TIMER (Pin 1): Timer Input Pin. An external capacitor C sets a 272.9ms/µF initial timing delay and a 21.7ms/ TIMER µF circuit breaker delay. The GATE pin turns off whenever the TIMER pin is pulled beyond the COMP2 threshold, such as for overvoltage detection with an external zener ...
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... LTC4210 monitors the load current through an external sense resistor. Overcurrent faults are actively limited to 50mV/R timer limit. The LTC4210-3 will automatically retry after a current limit fault while the LTC4210-4 latches off. The LTC4210-3 timer function limits the retry duty cycle to 3.8% for MOSFET cooling. LTC4210-3/LTC4210-4 ...
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... LTC4210-3/LTC4210-4 www.DataSheet4U.com U U APPLICATIO S I FOR ATIO Undervoltage Lockout An internal undervoltage lockout (UVLO) circuit resets the LTC4210 if the V supply is too low for normal operation. CC 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 ...
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... LIMIT(MIN SENSE(MIN) (4) Parasitic MOSFET Oscillation or C There are two possible parasitic oscillations when the MOSFET operates as a source follower when ramping at LTC4210-3/LTC4210-4 = 47nF and R = 100Ω. Despite the wire length, the The R resistor helps to minimize high G G helps in short-circuit transient recovery as ...
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... LTC4210-3/LTC4210-4 www.DataSheet4U.com U U APPLICATIO S I FOR ATIO power-up or during current limiting. The first type of oscil- lation occurs at high frequencies, typically above 1MHz. This high frequency oscillation is easily damped with R mentioned in method 2. The second type of oscillation occurs at frequencies between 200kHz and 800kHz due to the load capacitance being between 0.2µ ...
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... CLOAD t STARTUP current (<10µA). GATE (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 = ...
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... When the circuit breaker trips, the GATE pin is pulled low. 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 ...
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... FAULT Figure 8. Automatic Retry After Overcurrent Fault Latch-Off After Current Fault (LTC4210-4) Figure 9 shows the waveforms of the LTC4210-4 (latch-off version) during a circuit breaker fault. At time point B, the TIMER trips the COMP2 threshold. The GATE pin pulls to ground while the TIMER pin is latched high by a 5µA pull- up ...
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... MOSFET at the operating volt- age. In addition, the selected MOSFET should fulfill two V criteria: 1. Positive V absolute maximum rating > LTC4210-3/ GS LTC4210-4 maximum ∆V GATE 2. Negative V absolute maximum rating > supply GS voltage. The gate of the MOSFET can discharge faster than V when shutting down the MOSFET with a large ...
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... 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 ...
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... LTC4210-3/LTC4210 TYPICAL APPLICATIO APPLICATIO S I FOR ATIO R SENSE GATE (10a) BACKPLANE CONNECTOR (FEMALE GND RELATED PARTS PART NUMBER DESCRIPTION LTC1421 Two Channel, Hot Swap Controller LTC1422 Single Channel, Hot Swap Controller in SO-8 ...