LTC4213 Linear Technology, LTC4213 Datasheet
LTC4213
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LTC4213 Summary of contents
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... An ON pin controls the ON/OFF and resets circuit breaker faults. READY signals the MOSFET is conducting and the circuit breaker is armed. The LTC4213 operates from LTC and LT are registered trademarks of Linear Technology Corporation. ...
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... SEL Output Voltages GATE .....................................................– 0.3V to 15V READY .....................................................– 0. Operating Temperature Range LTC4213C ............................................... 0°C to 70°C LTC4213I ............................................. –40°C to 85°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10sec)................... 300°C ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T ...
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... Step to GATE Rising, ON (Normal Mode) V Step Note 2: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to ground unless otherwise specified. LTC4213 = 0 unless otherwise noted. (Note 2) MIN TYP ● 0.3 1.1 ● 0.15 0.8 ● ...
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... LTC4213 www.DataSheet4U.com W TYPICAL PERFOR A CE CHARACTERISTICS unless otherwise noted 3.0 2.5 2.0 1.5 1.0 0.5 0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 BIAS SUPPLY VOLTAGE (V) Normalized 1.06 1.04 1.02 1.00 0.98 0.96 0.94 2.0 2.5 3.0 3.5 4.0 4.5 5.0 BIAS SUPPLY VOLTAGE (V) Normalized V vs CB(FAST) Temperature 1.06 1.04 1.02 1.00 0.98 0.96 0.94 –50 – 100 TEMPERATURE (° Temperature CC 3.0 2.5 2.0 1.5 1.0 0.5 0 6.0 –50 – TEMPERATURE (°C) ...
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... BIAS SUPPLY VOLTAGE (V) 4213 G13 t and t vs DEBOUNCE READY Temperature 100 5.5 6.0 –50 – TEMPERATURE (°C) 4213 G16 LTC4213 Specifications are 25° ON(TH) CC 0.90 0.85 HIGH THRESHOLD 0.80 LOW THRESHOLD 0.75 0.70 0.65 75 100 125 2.0 2.5 3.0 3.5 4.0 BIAS SUPPLY VOLTAGE (V) 4213 G11 vs Temperature ∆ ...
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... LTC4213 www.DataSheet4U.com W TYPICAL PERFOR A CE CHARACTERISTICS unless otherwise noted Temperature RESET 100 –50 – 100 TEMPERATURE (°C) t FAULT(FAST) 1.3 1.2 1.1 1.0 0.9 0.8 0.7 2.0 2.5 3.0 BIAS SUPPLY VOLTAGE ( FAULT(SLOW 125 2.0 2.5 3.0 3.5 4.0 4.5 BIAS SUPPLY VOLTAGE (V) 4213 G19 ...
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... MOSFET is on and the circuit breaker is armed. Otherwise this pin pulls low. ON (Pin 2): ON Control Input. The LTC4213 is in reset mode when the ON pin is below 0.4V. When the ON pin increases above 0.8V, the device starts up and the GATE pulls up with a 100µ ...
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... LTC4213 www.DataSheet4U.com W BLOCK DIAGRA SENSEP SEL CB(FAST 100mV 325mV – 50mV 175mV 25mV 100mV + SLOWCOMP 16µs DELAY READY CB TRIPS 1 50µs DELAY RESET DELAY COMP1 – 0.4V 8 SENSEN 6 V CB(FAST) + – – + – FASTCOMP 280µA 1µs DELAY RESET OR ...
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... DIAGRA 1 V ON(TH GATE 1.2V ∆V SENSE V GATE – V ON(TH) ON(HYST) 0. DEBOUNCE OFF GSMAX V – 0.3V GSMAX V ON(RST FAULT(FAST) RESET LTC4213 ON(TH) V GSMAX V – 0.3V GSMAX 0. 0.3V V ON(TH) 4213 TD 4213f 9 ...
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... CB(FAST) breaker in 1µs. A severe short circuit condition can cause the load supply to dip substantially. This does not pose a problem for the LTC4213 as the input stages of the current limit compara- tors are common mode to ground sense the load current at the drain and source of the pin and external MOSFET ...
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... MOSFET and the circuit breaker voltage V I LIMIT The R DSON tion connections between the MOSFET drain and source to the LTC4213 SENSEP and SENSEN pins are strongly recommended. GSMAX For a selected MOSFET, the nominal load limit current is given by: I LIMIT NOM ( ...
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... Assuming a normal distribution with typical as mean, the minimum value can be estimated • DSON MIN ( ) DSON NOM ( The LTC4213 gives higher gate drive than the manufac- turer specified gate drive for R DSON lower R than specified. Operating temperature also DSON modulates the R value. DSON 12 W ...
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... W U CIRCUIT BREAKER TRIPS GATE AND READY PINS PULL LOW NOT RESET > TRIPS V < 0.4V ON DURATION > t RESET FAULT LATCHED OFF Figure 3. Resetting Fault Timing Diagram LTC4213 RESET REINITIALIZE RESTART DEBOUNCE STARTUP CYCLE 4213 F03 4213f 13 ...
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... OPMAX 2 • R DSON NOM ( ) Note that the the LTC4213 nominal DSON(NOM) operating ∆V rather than at typical vendor spec. GSMAX Table 1 gives the nominal operating ∆V various operating V . From this table users can refer to CC the MOSFET’s data sheet to obtain the R ...
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... RESET MODE W U CIRCUIT BREAKER ARMS 2.07V 0.8V ∆V GSMAX ∆V GSARM V th 100µA SENSEN STARTUP CYCLE DEBOUNCE t READY Figure 4. Load Supply Power-Up After Circuit Breaker Armed LTC4213 ∆V GSMAX SENSEN NORMAL CYCLE 4213 F04 4213f 15 ...
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... LTC4213 www.DataSheet4U.com U U APPLICATIO S I FOR ATIO Load Supply Power-Up Before V Referring back to Figure 1, the V powered up before V . Figure 5 shows the timing dia- CC gram with the V load supply active initially. An internal IN circuit ensures that the GATE pin is held low. At time point 1, V clears UVLO and at time point 2, ON clears 0.8V. ...
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... When ON is brought below 0.76V for 5µs, the GATE and READY pins are pulled low. The system resets when ON is brought below 0.4V for 80µs. MOSFET Selection The LTC4213 is designed to be used with logic (5V) and sub-logic (3V) MOSFETs for V CC with ∆V exceeding 4.5V. For a V GSMAX between 2 ...
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... A typical single supply Hot Swap application is shown in Figure 7. The RESET signal at the backplane is held low initially. When the PCB long edge makes contact the ON pin is held low (<0.4V) and the LTC4213 is kept in reset mode. When the short edge makes contact the V supply is connected to the card. The V RC filter ...
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... U DDB Package 8-Lead Plastic DFN (3mm × 2mm) (Reference LTC DWG # 05-08-1702) 3.00 ±0.10 (2 SIDES) 0.675 ±0.05 PIN 1 BAR TOP MARK (SEE NOTE 6) PACKAGE OUTLINE 0.200 REF LTC4213 R = 0.115 0.38 ± 0.10 TYP 5 8 0.56 ± 0.05 (2 SIDES) 2.00 ±0.10 (2 SIDES 0.25 ± 0.05 0.75 ±0.05 0.50 BSC 2.15 ± ...
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... Active Current Limiting with Drain Acceleration and Three Sequenced Power Good Outputs www.linear.com ● 330Ω IRF7455 V OUT 3.3V R3 3.6A 182k + C LOAD 100µF SENSEP GATE SENSEN R4 LTC4213 10k READY I GND SEL NC 4213 TA02 LT/TP 0405 500 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2005 4213f ...