LTC4361-2 Linear Technology, LTC4361-2 Datasheet
LTC4361-2
Related parts for LTC4361-2
LTC4361-2 Summary of contents
Page 1
... P-channel MOSFET for negative voltage protection. Following an overvoltage condition, the LTC4361 automati- cally restarts with a start-up delay. After an overcurrent fault, the LTC4361-1 remains off while the LTC4361-2 automatically restarts after a 130ms start-up delay. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ...
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... LTC4361-1/LTC4361-2 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Bias Supply Voltage (IN) ............................ –0.3V to 85V Input Voltages SENSE ................................................... –0.3V to 85V OUT, ON ................................................... –0. Output Voltages PWRGD .................................................... –0. GATE (Note 3) ........................................ –0.3V to 15V GATEP .................................................... –0.3V to 85V IN to GATEP ........................................... –0.3V to 10V PIN CONFIGURATION TOP VIEW ON 1 OUT 2 ...
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... Note 2: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to GND unless otherwise specifi ed. LTC4361-1/LTC4361-2 l The denotes the specifi cations which apply over the full operating = 25° ...
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... LTC4361-1/LTC4361-2 TYPICAL PERFORMANCE CHARACTERISTICS T = 25° 5V 0V, unless otherwise noted Input Supply Current vs Input Voltage 10000 1000 100 (V) IN 436112 G01 PWRGD Voltage vs PWRGD Current 500 400 300 200 100 (mA) ...
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... IN(OV) OV ing lockout, GATE is held low and the PWRGD pull-down releases. LTC4361-1/LTC4361-2 ON: On Control Input. A logic low at ON enables the LTC4361. A logic high at ON activates a low current pull- down at the GATE pin and causes the LTC4361 to enter a low current sleep mode. An internal 5μA current pulls ON down to ground ...
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... LTC4361-1/LTC4361-2 BLOCK DIAGRAM ON + – 1V 5μA 6 GATEP 5.8V 200k CHARGE 1.8M PUMP 10μA GATE HIGH COMPARATOR + – V GATE(TH) OVERCURRENT COMPARATOR + 50mV – + – CONTROL OVERVOLTAGE COMPARATOR + – GND www.DataSheet4U.com IN SENSE GATE 5.8V OUT 500k 5.8V PWRGD 5.7V 436112 BD 436112f ...
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... A sense resistor placed between IN and SENSE implements an overcurrent protection with a 50mV trip threshold and a 10μs glitch fi lter. After an overcurrent, the LTC4361-1 latches off while the LTC4361-2 restarts following a 130ms delay. The LTC4361 has a CMOS compatible ON input. When driven low, the part is enabled. When driven high, the external N-channel MOSFET is turned off and the supply current of the LTC4361 drops to 1.5μ ...
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... It trips when the SENSE pin falls more than 50mV below IN for more than 10μs. When the overcur- rent comparator trips, GATE is pulled low quickly and the PWRGD pull-down releases. The LTC4361-2 automatically tries to apply power again after a 130ms start-up delay. www.DataSheet4U.com ...
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... The PWRGD pull-down is capable of sinking up to 3mA of current allowing it to drive an optional LED. To inter- face PWRGD to another I/O rail, connect a resistor from PWRGD to the I/O rail with a resistance low enough to override the internal 500k pull-up to OUT. Figure 2 details PWRGD behavior for a LTC4361-2 with 1k pull- PWRGD. RESTART RESTART ON ...
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... LTC4361-1/LTC4361-2 APPLICATIONS INFORMATION ON Input CMOS compatible, active low enable input. It has a default 5μA pull-down to ground. Connect this pin to ground or leave open to enable normal device operation driven high while the external MOSFET is turned on, GATE is pulled low with a weak pull-down current (40μA) to turn off the external MOSFET gradually, minimizing input voltage transients ...
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... The inductor L lumped equivalent inductance of the cable and the EMI fi lter found in some wall adaptors the lumped equivalent IN resistance of the cable, adaptor output capacitor ESR and the connector contact resistance. LTC4361-1/LTC4361-2 MOBILE DEVICE C OUT LOAD 436112 F04a Figure 4. 20V Hot-Plug into a 10μ ...
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... LTC4361-1/LTC4361-2 APPLICATIONS INFORMATION As the IN pin can withstand up to 80V, a high voltage N- channel MOSFET can be used to protect the system against rugged abuse from high transient or DC voltages up to the BV of the MOSFET. Figure 6 shows a 50V input plugged DSS into the LTC4361 controlling a 60V rated MOSFET. ...
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... GND 436112 F08 LTC4361 IN R SUPPLY Si1470DH SENSE 436112 F10 Figure 10. Layout for N-Channel MOSFET Confi guration www.DataSheet4U.com LTC4361-1/LTC4361-2 overshoots to a dangerous voltage. OUT also helps to lower the ΔV OUT OUT if the MOSFET BV IN for an accurate overcurrent threshold. SENSE V ...
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... LTC4361-1/LTC4361-2 PACKAGE DESCRIPTION 2.55 0.05 0.64 0.05 1.15 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED PIN 1 BAR TOP MARK (SEE NOTE 6) 0.200 REF 14 DC Package 8-Lead Plastic DFN (2mm × 2mm) (Reference LTC DWG # 05-08-1719 Rev A) 0.70 0.05 PACKAGE OUTLINE 0 ...
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... TS8 Package 8-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1637) 0.65 REF 1.22 REF 1.50 – 1.75 2.80 BSC 1.4 MIN (NOTE 4) 0.65 BSC 0.80 – 0.90 1.00 MAX 0.09 – 0.20 (NOTE 3) www.DataSheet4U.com LTC4361-1/LTC4361-2 2.90 BSC (NOTE 4) PIN ONE ID 0.22 – 0.36 8 PLCS (NOTE 3) 0.01 – 0.10 1.95 BSC TS8 TSOT-23 0802 436112f 15 ...
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... LTC4361-1/LTC4361-2 TYPICAL APPLICATION 5V System Protected from ±24V Power Supplies and Overcurrent Si3590DV R SENSE 0.05Ω GATE SENSE OUT LTC4361 IN GATEP ON PWRGD GND RELATED PARTS PART NUMBER DESCRIPTION LTC2935 Ultralow Power Supervisor with Eight Pin-Selectable Thresholds LT3008 20mA, 45V, 3μA I ...