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LTC4219 Datasheet(PDF) 3 Page - Linear Technology |
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LTC4219 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 16 page  LTC4219 3 4219f ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VDD = 12V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS DC Characteristics VDD Input Supply Range l 2.9 15 V IDD Input Supply Current MOSFET On, No Load l 1.6 3 mA VDD(UVL) Input Supply Undervoltage Lockout VDD Rising l 2.65 2.73 2.85 V VOUT(PGTH) Output Power Good Threshold LTC4219-12, VOUT Rising l 10.2 10.5 10.8 V LTC4219-5, VOUT Rising l 4.2 4.35 4.5 V ΔVOUT(PGHYST) Output Power Good Hysteresis LTC4219-12 l 127 170 213 mV LTC4219-5 l 53 71 89 mV IOUT OUT Pin Leakage Current VOUT = VGATE = 0V, VDD = 15V l 0±150 μA VOUT = VGATE = 12V, LTC4219-12 l 50 70 90 μA VOUT = VGATE = 5V, LTC4219-5 l 26 36 46.5 μA ΔVGATE/Δt GATE Pin Turn-On Ramp Rate l 0.15 0.3 0.55 V/ms RON MOSFET + Sense Resistor On Resistance l 15 33 50 m Ω ILIM(TH) Current Limit Threshold VFB = 1.23V l 5.0 5.6 6.1 A VFB = 0V l 1.2 1.5 1.8 A VFB = 1.23V, RSET = 20kΩ l 2.6 2.9 3.3 A Inputs IIN EN1, EN2 Pin Input Current VIN = 1.2V l 0±1 μA RFB FB Pin Input Resistance LTC4219-12 LTC4219-5 l l 13 20 18 29 23 37 kΩ kΩ VTH EN1, EN2, FB Pin Threshold Voltage VIN Rising l 1.21 1.235 1.26 V ΔVEN(HYST) EN1, EN2 Pin Hysteresis l 50 80 110 mV ΔVFB(HYST) FB Pin Power Good Hysteresis l 10 20 30 mV RISET ISET Pin Output Resistor l 19 20 21 k Ω Outputs VINTVCC INTVCC Output Voltage VDD = 5V, 15V ILOAD = 0mA, –10mA l 2.8 3.0 3.2 V VOL PG, FLT Pin Output Low Voltage IOUT = 2mA l 0.4 0.8 V IOH PG, FLT Pin Input Leakage Current VOUT = 30V l 0 ±10 μA VTIMER(H) TIMER Pin High Threshold VTIMER Rising l 1.2 1.235 1.28 V VTIMER(L) TIMER Pin Low Threshold VTIMER Falling l 0.1 0.21 0.3 V ITIMER(UP) TIMER Pin Pull-Up Current VTIMER = 0V l –80 –100 –120 μA ITIMER(DN) TIMER Pin Pull-Down Current VTIMER = 1.2V l 1.4 2 2.6 μA ITIMER(RATIO) TIMER Pin Current Ratio ITIMER(DN)/ITIMER(UP) l 1.6 2 2.7 % AIMON IMON Pin Current Gain IOUT = 5A l 18.5 20 21.5 μA/A IOFF(IMON) IMON Pin Offset Current IOUT = 330mA l 0 ±4.5 μA IGATE(UP) Gate Pull-Up Current Gate Drive On, VGATE = VOUT = 12V l –19 –24 –29 μA IGATE(DN) Gate Pull-Down Current Gate Drive Off, VGATE = 18V, VOUT = 12V l 190 250 340 μA IGATE(FST) Gate Fast Pull-Down Current Fast Turn Off, VGATE = 18V, VOUT = 12V 140 mA |
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