Datasheet LTC4368 (Analog Devices) - 3

LTC4368
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature 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. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN, VOUT, SENSE
VIN Input Voltage: Operating Range l 2.5 60 V Protection Range l –40 100 V VIN(UVLO) Input Supply Undervoltage Lockout VIN Rising l 1.8 2.2 2.4 V IVIN Input Supply Current: On SHDN = 2.5V, SENSE = VOUT = VIN l 30 100 µA Off SHDN = 0V, SENSE = VOUT = VIN l 5 25 µA IVIN(R) Reverse Input Supply Current VIN = –40V, SENSE = VOUT = 0V l –1.5 –2.5 mA VOUT(UVLO) VOUT Undervoltage Lockout VOUT Rising, VOUT – SENSE = 100mV, VIN = 12V l 1.8 2.2 2.4 V tVOUT(UVLO) VOUT Undervoltage Lockout Delay VIN = 12V, VOUT:0V→12V, VOUT – SENSE = 100mV l 40 120 280 µs IVOUT VOUT Input Current: On SHDN = 2.5V, SENSE = VOUT = VIN l 50 125 µA Off SHDN = 0V, SENSE = VOUT = VIN l 3 20 µA Reverse VIN = –40V, SENSE = VOUT = 0V l 20 50 µA
Current Sense
ISENSE SENSE Input Current: On SHDN = 2.5V, SENSE = VOUT = VIN l 1.2 2 µA Off SHDN = 0V, SENSE = VOUT = VIN l 0.1 2 µA Reverse VIN = –40V, SENSE = VOUT = 0V l 1 10 µA ΔVSENSE,F Overcurrent Fault Threshold, Forward VOUT = VIN l 40 50 60 mV (SENSE – VOUT) VIN = 12V, VOUT = 0.5V l 40 50 60 mV VIN = 12V, VOUT = 0V l 30 50 70 mV ΔVSENSE,R Overcurrent Fault Threshold, Reverse LTC4368-1 VOUT = VIN l –42 –50 –58 mV (SENSE – VOUT) LTC4368-2 VOUT = VIN l –1 –3 –5 mV ΔVRR Reverse Overcurrent Re-Enable VIN = SENSE = 6V to 60V l 75 100 125 mV Turn-On Threshold (VIN – VOUT) VIN = SENSE = 2.5V to <6V l 20 50 125 mV
GATE
ΔVGATE Gate Drive (GATE – VOUT) VIN = 2.5V, IGATE = 0µA, –1µA l 3 4 5.5 V VIN = 5V, IGATE = 0µA, –1µA l 7.2 8.7 10.8 V VIN = 12V to 60V, IGATE = 0µA, –1µA l 10 11 13.1 V 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) Rev A For more information www.analog.com 3 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