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LT1308BIS8-PBF Datasheet(PDF) 3 Page - Linear Technology |
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LT1308BIS8-PBF Datasheet(HTML) 3 Page - Linear Technology |
3 / 20 page 3 LT1308A/LT1308B 1308abfa The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. Industrial Grade – 40 °C to 85°C. VIN = 1.2V, VSHDN = VIN, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IQ Quiescent Current Not Switching, LT1308A ● 140 240 μA Switching, LT1308B ● 2.5 4 mA VSHDN = 0V (LT1308A/LT1308B) ● 0.01 1 μA VFB Feedback Voltage ● 1.19 1.22 1.25 V IB FB Pin Bias Current (Note 3) ● 27 80 nA Reference Line Regulation 1.1V ≤ VIN ≤ 2V ● 0.05 0.4 %/V 2V ≤ VIN ≤ 10V ● 0.01 0.2 %/V Minimum Input Voltage 0.92 1 V gm Error Amp Transconductance ΔI = 5μA60 μmhos AV Error Amp Voltage Gain 100 V/V ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. Commercial Grade 0°C to 70°C. VIN = 1.1V, VSHDN = VIN, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IQ Quiescent Current Not Switching, LT1308A 140 240 μA Switching, LT1308B 2.5 4 mA VSHDN = 0V (LT1308A/LT1308B) 0.01 1 μA VFB Feedback Voltage ● 1.20 1.22 1.24 V IB FB Pin Bias Current (Note 3) ● 27 80 nA Reference Line Regulation 1.1V ≤ VIN ≤ 2V ● 0.03 0.4 %/V 2V ≤ VIN ≤ 10V 0.01 0.2 %/V Minimum Input Voltage 0.92 1 V gm Error Amp Transconductance ΔI = 5μA60 μmhos AV Error Amp Voltage Gain 100 V/V fOSC Switching Frequency VIN = 1.2V ● 500 600 700 kHz Maximum Duty Cycle ● 82 90 % Switch Current Limit Duty Cyle = 30% (Note 4) 2 3 4.5 A Switch VCESAT ISW = 2A (25°C, 0°C), VIN = 1.5V 290 350 mV ISW = 2A (70°C), VIN = 1.5V 330 400 mV Burst Mode Operation Switch Current Limit VIN = 2.5V, Circuit of Figure 1 400 mA (LT1308A) Shutdown Pin Current VSHDN = 1.1V ● 25 μA VSHDN = 6V ● 20 35 μA VSHDN = 0V ● 0.01 0.1 μA LBI Threshold Voltage 196 200 204 mV ● 194 200 206 mV LBO Output Low ISINK = 50μA ● 0.1 0.25 V LBO Leakage Current VLBI = 250mV, VLBO = 5V ● 0.01 0.1 μA LBI Input Bias Current (Note 5) VLBI = 150mV 33 100 nA Low-Battery Detector Gain 3000 V/V Switch Leakage Current VSW = 5V ● 0.01 10 μA |
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