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LTC3890 Datasheet(PDF) 4 Page - Linear Technology |
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LTC3890 Datasheet(HTML) 4 Page - Linear Technology |
4 / 24 page LT4363 4 4363fa Note 2: All currents into device pins are positive all current out of device pins are negative. All voltages are referenced to GND unless otherwise specified. Note 3: An internal clamp limits the GATE pin to a minimum of 10V above the OUT pin. Driving this pin to voltages beyond the clamp may damage the device. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ITMR TMR Pull-up Current, Overvoltage TMR = 1V, FB = 1.5V, ΔVDS = 0.5V TMR = 1V, FB = 1.5V, ΔVDS = 75V l l –1.7 –42 –4 –50 –6 –58 µA µA TMR Pull-up Current, OV Warning TMR = 1.325V, FB = 1.5V, ΔVDS = 0.5V l –3 –5 –7 µA TMR Pull-up Current, Overcurrent TMR = 1V, ΔVSNS = 100mV, ΔVDS = 0.5V TMR = 1V, ΔVSNS = 100mV, ΔVDS = 80V l l –5 –190 –9 –250 –13 –310 µA µA TMR Pull-up Current, Cool Down TMR = 3V, FB = 1.5V, ΔVSNS = 0V, ΔVDS = 0V l –1 –2.3 –3.5 µA TMR Pin Pull-down Current, Cool Down VTMR = 3V, FB = 1.5V, ΔVSNS = 0V, ΔVDS = 0V l 1 2 4 µA VTMR(F) VTMR(G) VTMR(R) TMR Fault Threshold TMR Gate Off Threshold TMR Restart Threshold TMR Rising TMR Rising TMR Falling, LT4363-2 l l l 1.235 1.335 0.47 1.275 1.375 0.5 1.31 1.41 0.53 V V V ΔVTMR Early Warning Window VTMR(G) – VTMR(F) l 80 100 120 mV VTMR(H) TMR Cool Down High Threshold VCC = 7V to 80V, TMR Rising l 3.7 4.3 5 V VUV UV Input Threshold UV Rising l 1.24 1.275 1.31 V VUV(HYST) UV Input Hysteresis 12 mV VOV OV Input Threshold OV Rising l 1.24 1.275 1.31 V VOV(HYST) OV Input Hysteresis 7.5 mV IIN UV, OV Input Current UV = 1.275V UV = –60V l l ±0.2 –1 ±1 –2 µA mA ILEAK FLT, ENOUT Leakage Current FLT, ENOUT = 80V l ±0.5 ±2.5 µA VOL FLT, ENOUT Output Low ISINK = 0.1mA ISINK = 2mA l l 300 2 800 9 mV V ΔVOUT(TH) OUT High Threshold ΔVOUT = VCC – VOUT, ENOUT From Low to High l 0.25 0.5 0.75 V ΔVOUT(RST) OUT Reset Threshold ENOUT From High to Low l 1.9 2.7 3.6 V IOUT OUT Input Current VCC = OUT = 12V, SHDN Open VCC = OUT = 12V, SHDN = 0V l l 0.25 0.25 0.5 1 mA mA VSHDN SHDN Threshold VCC = 4V to 80V l 0.6 0.4 1.4 1.7 2.1 V V VSHDN(Z) SHDN Open Voltage VCC = 4V to 80V l 2.2 V ISHDN SHDN Current SHDN = 0.4V l –1 –4 –8 µA tRESET SHDN Reset Time SHDN ≤ 0.4V; LT4363-1 l 100 µs D Retry Duty Cycle; Overvoltage VCC = 80V, OUT = 16V, FB = 1.5V; LT4363-2 l 1 2 % Retry Duty Cycle; Output Short VCC = 12V, OUT = 0V, ∆VSNS = 100mV; LT4363-2 l 0.76 1 % tOFF(UV) Undervoltage Turn Off Propagation Delay UV Steps from 1.5V to 1V l 2 5 µs tOFF(OV) Overvoltage Turn Off Propagation Delay FB Steps from 0V to 1.5V; OUT = 0V l 0.25 1 µs tOFF(OC) Overcurrent Turn Off Propagation Delay ∆VSNS Steps from 0V to 150mV; OUT = 0V l 1 2.5 µs Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 12V, unless otherwise noted. |
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