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LT3752MPFE#PBF Datasheet(PDF) 6 Page - Analog Devices |
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LT3752MPFE#PBF Datasheet(HTML) 6 Page - Analog Devices |
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6 / 52 page  LT3752/LT3752-1 6 Rev. C For more information www.analog.com ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, UVLO_VSEC = 2.5V. PARAMETER CONDITIONS MIN TYP MAX UNITS COMP Sink Current FB = 1.5V, COMP = 1.75V 6.5 11.5 mA COMP Output High Clamp FB = 1V 2.6 V COMP Switching Threshold 1.25 V Current Sense (Main Loop) ISENSEP Maximum Threshold FB = 1V, OC = 0V 180 220 260 mV COMP Current Mode Gain ∆VCOMP/∆VISENSEP 6.1 V/V ISENSEP Input Current (D = 0%) (Note 10) 2 µA ISENSEP Input Current (D = 80%) (Note 10) 33 µA ISENSEN Input Current FB = 1.5V (COMP Open) (Note 10) FB = 1V (COMP Open) (Note 10) 20 90 30 135 µA µA OC Overcurrent Threshold l 82.5 96 107.5 mV OC Input Current 200 500 nA AOUT Driver (Active Clamp Switch Control) (LT3752 External PMOS; LT3752-1 External NMOS) AOUT Rise Time CL = 1nF (Note 5), INTVCC = 12V 23 ns AOUT Fall Time CL = 1nF (Note 5), INTVCC = 12V 19 ns AOUT Low Level 0.1 V AOUT High Level INTVCC = 12V 11.9 V AOUT High Level in Shutdown (LT3752) UVLO_VSEC = 0V, INTVCC = 8V, IAOUT = 1mA Out of the Pin 7.8 V AOUT Low Level in Shutdown (LT3752-1) UVLO_VSEC = 0V, INTVCC = 12V, IAOUT = 1mA Into the Pin 0.25 V AOUT Edge to OUT (Rise): (tAO) CSOUT = 1nF, COUT = 3.3nF, INTVCC = 12V RTAO = 44.2k RTAO = 73.2k (Note 11) 168 253 218 328 268 403 ns ns OUT (Fall) to AOUT Edge: (tOA) CSOUT = 1nF, COUT = 3.3nF, INTVCC = 12V RTAO = 44.2k RTAO = 73.2k (Note 12) 150 214 196 295 250 376 ns ns SOUT Driver (Synchronous Rectification Control) SOUT Rise Time COUT = 1nF, INTVCC = 12V (Note 5) 21 ns SOUT Fall Time COUT = 1nF, INTVCC = 12V (Note 5) 19 ns SOUT Low Level 0.1 V SOUT High Level INTVCC = 12V 11.9 V SOUT High Level in Shutdown UVLO_VSEC = 0V, INTVCC = 8V, ISOUT = 1mA Out of the Pin 7.8 V AOUT Edge to SOUT (Fall): (tAS) CAOUT = CSOUT = 1nF, INTVCC = 12V RTAS = 44.2k (Note 13) RTAS = 73.2k 168 253 218 328 268 403 ns ns SOUT (Fall) to OUT (Rise): (tSO = tAO – tAS) CSOUT = 1nF, COUT = 3.3nF, INTVCC = 12V RTAO = 73.2k, RTAS = 44.2k (Notes 11, 13) RTAO = 44.2k, RTAS = 73.2k 70 –70 110 –110 132 –132 ns ns OUT (Fall) to SOUT (Rise): (tOS) CSOUT = 1nF, COUT = 3.3nF, INTVCC = 12V RTOS = 14.7k RTOS = 44.2k (Note 14) 52 102 68 133 84 164 ns ns OUT Driver (Main Power Switch Control) OUT Rise Time COUT = 3.3nF, INTVCC = 12V (Note 5) 19 ns OUT Fall Time COUT = 3.3nF, INTVCC = 12V (Note 5) 20 ns OUT Low Level 0.1 V |
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