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LT3970IDDB-5-TRPBF Datasheet(PDF) 3 Page - Linear Technology |
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LT3970IDDB-5-TRPBF Datasheet(HTML) 3 Page - Linear Technology |
3 / 22 page LT3970/LT3970-3.3/LT3970-5 3 3970fa ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VBD = 3.3V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Minimum Input Voltage l 4 4.2 V Quiescent Current from VIN VEN Low VEN High VEN High, –40°C to 125°C VEN High, –40°C to 150°C l l 0.7 1.7 1.2 2.7 3.5 4 μA μA μA μA LT3970 Feedback Voltage l 1.195 1.185 1.21 1.21 1.225 1.235 V V LT3970-3.3 Output Voltage –40°C to 125°C –40°C to 150°C l l 3.26 3.234 3.217 3.3 3.3 3.3 3.34 3.366 3.366 V V V LT3970-5 Output Voltage –40°C to 125°C –40°C to 150°C l l 4.94 4.9 4.875 5 5 5 5.06 5.1 5.1 V V V LT3970 FB Pin Bias Current (Note 3) VFB = 1.21V l 0.1 20 nA FB/Output Voltage Line Regulation 4.2V < VIN < 40V 0.0002 0.01 %/V Switching Frequency RT = 41.2k, VIN = 6V RT = 158k, VIN = 6V RT = 768k, VIN = 6V 1.76 640 160 2.25 800 200 2.64 960 240 MHz kHz kHz Switch Current Limit VIN = 5V, VFB = 0V 535 700 865 mA Catch Schottky Current Limit VIN = 5V 350 400 500 mA Switch VCESAT ISW = 200mA 175 mV Switch Leakage Current 0.05 2 μA Catch Schottky Forward Voltage ISCH = 100mA, VIN = VBD = NC 650 mV Catch Schottky Reverse Leakage VSW = 12V 0.05 2 μA Boost Schottky Forward Voltage ISCH = 50mA, VIN = NC, VBOOST = 0V 875 mV Boost Schottky Reverse Leakage VREVERSE = 12V 0.02 2 μA Minimum Boost Voltage (Note 4) VIN = 5V l 1.4 1.8 V BOOST Pin Current ISW = 200mA, VBOOST = 15V 7 10 mA EN Pin Current VEN = 12V 1 30 nA LT3970 EN Voltage Threshold EN Rising, VIN ≥ 4.2V l 0.94 1 1.06 V LT3970-X EN Voltage Threshold EN Rising, VIN ≥ 4.2V l 0.93 1 1.07 V EN Voltage Hysteresis 30 mV LT3970 PG Threshold Offset from Feedback Voltage VFB Rising 80 120 160 mV LT3970 PG Hysteresis 12 mV LT3970-X PG Threshold Offset from Output Voltage VFB Rising 6.5 10 13.5 % LT3970-X PG Hysteresis as % of Output Voltage 1.0 % PG Leakage VPG = 3V 0.01 1 μA PG Sink Current VPG = 0.4V l 30 80 μA Minimum Switch On-Time 90 ns Minimum Switch Off-Time VIN = 10V l 100 160 ns |
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