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LTC1266IS Datasheet(PDF) 3 Page - Linear Technology |
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LTC1266IS Datasheet(HTML) 3 Page - Linear Technology |
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3 / 20 page  3 LTC1266 LTC1266-3.3/LTC1266-5 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VSENSE 1 Current Sense Threshold VBINH = 0V (Burst Mode Operation Enabled) LTC1266 VSENSE– = 3.3V, VFB = VOUT/2.64 + 25mV (Forced) 25 mV VSENSE– = 3.3V, VFB = VOUT/2.64 – 25mV (Forced) q 135 155 175 mV LTC1266-3.3 VSENSE– = VOUT + 100mV (Forced) 25 mV VSENSE– = VOUT – 100mV (Forced) q 135 155 175 mV LTC1266-5 VSENSE– = VOUT + 100mV (Forced) 25 mV VSENSE– = VOUT – 100mV (Forced) q 135 155 175 mV VSENSE 2 Current Sense Threshold VBINH = 2.1V (Burst Mode Operation Disabled) LTC1266 VSENSE– = 3.3V, VFB = VOUT/2.64 + 25mV (Forced) – 20 mV VSENSE– = 3.3V, VFB = VOUT/2.64 – 25mV (Forced) q 135 155 175 mV LTC1266-3.3 VSENSE– = VOUT + 100mV (Forced) – 20 mV VSENSE– = VOUT – 100mV (Forced) q 135 155 175 mV LTC1266-5 VSENSE– = VOUT + 100mV (Forced) – 20 mV VSENSE– = VOUT – 100mV (Forced) q 135 155 175 mV VSHDN Shutdown Pin Threshold 0.6 0.8 2 V ISHDN Shutdown Pin Input Current 0V < VSHDN < 8V, VIN = 16V 1.2 5 µA IPINV Phase Invert Pin Input Current 0V < VPINV < 18V, VIN = 18V 0.2 1 µA VBINH Burst Mode Operation VIN = 7V 0.8 1.2 2 V Inhibit Pin Threshold IBINH Burst Mode Operation 0V < VBINH < 18V, VIN = 18V 0.2 1 µA Inhibit Pin Input Current ICT CT Pin Discharge Current VSENSE+ = VOUT – 100mV, VSENSE– = VOUT – 300mV 50 70 90 µA VOUT = 0V 2 10 µA tOFF Off-Time (Note 4) CT = 390pF, ILOAD = 700mA 4 5 6 µs tMAX Max On-Time VOUT = 0V, VIN = 18V 60 µs tr, tf Driver Output Transition Times (Note 7) CL = 3000pF (Pins 1, 16), VIN = 6V 100 200 ns VCLAMP Output Voltage Clamp in VBINH = 2.1V Burst Mode Operation Inhibit LTC1266 Measured at VFB 1.30 V LTC1266-3.3 Measured at VSENSE– 3.43 V LTC1266-5 Measured at VSENSE– 5.20 V VLBTRIP Low-Battery Trip Point VIN = 5V 1.14 1.25 1.35 V VIN = 12V 1.17 1.30 1.42 V ILBLEAK Max Leakage Current Into Pin 14 VLBOUT = 18V, VLBIN = 2V 25 200 nA ILBSINK Max Sink Current Into Pin 14 VLBOUT = 1V, VLBIN = 0V, 2.5V < VIN < 18V 1 8 mA ILBIN Max Leakage Current Into Pin 13 VLBIN = 18V 0.2 1 µA The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VSHDN = VBINH = 0V unless otherwise noted. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VFB Feedback Voltage VIN = 9V, ILOAD = 700mA, VPINV = VPWR = 14V, Topside Switch = N-Ch LTC1266AIS 1.246 1.265 1.290 V LTC1266CS, LTC1266IS 1.210 1.265 1.290 V VOUT Regulated Output Voltage VIN = 9V, ILOAD = 700mA, VPINV = VPWR = 14, Topside Switch = N-Ch LTC1266CS-3.3, LTC1266IS-3.3 3.23 3.33 3.43 V LTC1266CS-5, LTC1266IS-5 4.90 5.05 5.20 V –40 °C < TA < 85°C (Note 5), VIN = 10V, unless otherwise noted. |
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