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LT1871IMS-7 Datasheet(PDF) 4 Page - Linear Technology |
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LT1871IMS-7 Datasheet(HTML) 4 Page - Linear Technology |
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4 / 32 page  LTC1871-7 4 18717fc FB Voltage vs Temp FB Voltage Line Regulation FB Pin Current vs Temperature ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 8V, VRUN = 1.5V, RFREQ = 80k, VMODE/SYNC = 0V, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS UVLO INTVCC Undervoltage Lockout Threshold Rising INTVCC Falling INTVCC UVLO Hysteresis 5.6 4.6 1.0 V V V ΔVINTVCC ΔVIN1 INTVCC Regulator Line Regulation 8V ≤ VIN ≤ 15V 8 25 mV ΔVINTVCC ΔVIN2 INTVCC Regulator Line Regulation 15V ≤ VIN ≤ 30V 70 200 mV VLDO(LOAD) INTVCC Load Regulation 0 ≤ IINTVCC ≤ 20mA, VIN = 8V – 2 –0.2 % VDROPOUT INTVCC Regulator Dropout Voltage VIN = 6V, INTVCC Load = 20mA 280 mV GATE Driver tr GATE Driver Output Rise Time CL = 3300pF (Note 7) 17 100 ns tf GATE Driver Output Fall Time CL = 3300pF (Note 7) 8 100 ns 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. Note 2: The LTC1871E-7 is guaranteed to meet performance specifications from 0°C to 70°C junction temperature. Specifications over the – 40°C to 85°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The LTC1871I-7 is guaranteed over the full –40°C to 125°C operating junction temperature range. Note 3: TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formula: TJ = TA + (PD • 120°C/W) Note 4: The dynamic input supply current is higher due to power MOSFET gate charging (QG • fOSC). See Applications Information. Note 5: The LTC1871-7 is tested in a feedback loop that servos VFB to the reference voltage with the ITH pin forced to a voltage between 0V and 1.4V (the no load to full load operating voltage range for the ITH pin is 0.3V to 1.23V). Note 6: In a synchronized application, the internal slope compensation gain is increased by 25%. Synchronizing to a significantly higher ratio will reduce the effective amount of slope compensation, which could result in subharmonic oscillation for duty cycles greater than 50%. Note 7: Rise and fall times are measured at 10% and 90% levels. TYPICAL PERFORMANCE CHARACTERISTICS TEMPERATURE (°C) –50 1.23 1.24 150 18717 G01 1.22 1.21 0 50 100 –25 25 75 125 1.25 VIN (V) 0 1.229 1.230 1.231 510 15 20 18717 G02 25 30 35 TEMPERATURE (°C) –50 0 10 20 30 40 60 –25 25 0 50 100 75 18717 G03 125 150 50 |
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Similar Description - LT1871IMS-7 |
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