LTC4368 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25°C. VIN = 2.5V to 60V, unless otherwise noted (Note 2). UV = 2.5V, OV = 0V,SHDN = 2.5V, SENSE = VOUT = VIN unless otherwise specified.SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS IGATE(UP) Gate Pull Up Current GATE = 15V, VIN = 12V l –20 –35 –60 µA IGATE(SLOW) Gate Slow Pull Down Current GATE = 20V, VIN = 12V l 40 90 160 µA IGATE(FAST) Gate Fast Pull Down Current GATE = 20V, SENSE = VIN = 12V l 30 60 90 mA tD(FAST) Gate Fast Turn Off Delay CGATE = 2.2nF: UV, OV Fault l 2 6 µs tD(SLOW) Gate Slow Turn Off Delay CGATE = 2.2nF, SHDN Falling, VIN = 12V l 150 275 575 µs tD(ON) Gate Turn-On Delay Time VIN = 12V, Power Good to ΔVGATE > 0V l 22 32 45 ms tp(GATE) Overcurrent Fault Propagation Delay CGATE = 2.2nF, Overcurrent Fault to ΔVGATE = 0V l 3 8 18 µs SENSE – VOUT: 0 to +100mV, or SENSE – VOUT: 0 to –100mV (LTC4368-1) SENSE – VOUT: 0 to –10mV (LTC4368-2) UV, OV VUV UV Input Threshold Voltage UV Falling l 492.5 500 507.5 mV VOV OV Input Threshold Voltage OV Rising l 492.5 500 507.5 mV VUVHYST UV Input Hysteresis l 20 25 32 mV VOVHYST OV Input Hysteresis l 20 25 32 mV ILEAK UV, OV Leakage Current V = 0.5V, VIN = 60V l ±10 nA tFAULT UV, OV Fault Propagation Delay Overdrive = 50mV, VIN = 12V l 1 2 µs SHDN VSHDN SHDN Input Threshold SHDN Falling l 0.4 0.75 1.2 V ISHDN SHDN Input Current SHDN = 10V, VIN = 60V l ±15 nA tSTART Delay Coming Out of Shutdown Mode SHDN Rising to FAULT, VIN = 12V l 400 800 1400 µs tSHDN(F) SHDN To FAULT Asserted VIN = 12V l 1.5 3 µs tLOWPWR Delay From Turn Off to Low Power VIN = 12V l 20 32 48 ms Operation FAULT VOL FAULT Output Voltage Low IFAULT = 500µA, VIN = 12V l 0.15 0.4 V IFAULT FAULT Leakage Current FAULT = 5V, VIN = 60V l ±20 nA RETRY VRETRY Configuration Threshold for GATE RETRY Falling to ΔIRETRY > 2µA l 0.5 1 1.5 V Latch-Off VIN = 12V IRETRY Output Current for RETRY Timer RETRY = 2V, VIN = 12V l 2.5 3.5 4.5 µA RETRY = 0V, VIN = 12V l –10 –17 –25 µA tCLEAR Minimum SHDN Pulse to Clear Forward RETRY = 0V, VIN = 12V l 15 µs Overcurrent RETRY Latch tRETRY Forward Overcurrent Cool-Down Delay FAULT Asserted to FAULT Released, CRETRY = 22nF l 80 120 150 ms SENSE = VOUT = VIN = 12V Note 1. Stresses beyond those listed under Absolute Maximum Ratings Note 2. All currents into pins are positive; all voltages are referenced to may cause permanent damage to the device. Exposure to any Absolute GND unless otherwise noted. Maximum Rating condition for extended periods may affect device Note 3. These pins can be tied to voltages below –0.3V through a resistor reliability and lifetime. that limits the current below 1mA. Rev. B 4 For more information www.analog.com Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Pin Functions Block Diagram Applications Information Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
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