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3513 数据表(PDF) 3 Page - Linear Technology |
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3513 数据表(HTML) 3 Page - Linear Technology |
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3 / 20 page ![]() LT3513 3 3513fa ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX UNITS FB Threshold Offset to Begin CT Charge (Note 3) 90 125 160 mV CT Pin Current Source All FB Pins = 1.5V 16 20 25 μA CT Threshold to Power VON All FB Pins = 1.5V 1 1.1 1.2 V VON Switch Drop VON Current = 30mA 200 400 mV Maximum VON Current VE3 = 30V l 30 50 mA VON_CLK Input Voltage High 1.5 V VON_CLK Input Voltage Low 0.3 V VONSINK Voltage On VONSINK Current = 1μA ● 1.2 V Master Oscillator Frequency ● 1.90 1.80 2 2.12 2.22 MHz MHz Foldback Switching Frequency All FB = 0V 200 kHz UVLO Pin Threshold UVLO Pin Voltage Rising 1.25 V UVLO Pin Hysteresis Current VUVLO = 1V 3.4 3.9 4.4 μA PGOOD Threshold Offset 90 125 160 mV PGOOD Sink Current PGOOD Connected to 40V Through 100k 4 mA PGOOD Pin Leakage VPGOOD = 40V 1 μA Switch 1 (2.2A Buck) FB1 Voltage ● 1.215 1.205 1.235 1.255 1.265 V V FB1 Voltage Line Regulation 4.5V < VIN < 32V 0.01 0.03 %/V FB1 Pin Bias Current (Note 4) ● 30 200 nA Error Amplifier 1 Voltage Gain 250 V/V Error Amplifier 1 Transconductance ΔI = 10μA 220 μmhos Maximum Duty Cycle ● 75 85 % Switch 1 Current Limit Duty Cycle = 35% (Note 5) 2.2 3 3.5 A Switch 1 VCESAT ISW = 1.5A 430 mV Switch 1 Leakage Current FB1 = 1.5V 0.1 10 μA Minimum BOOST Voltage Above SW1 Pin ISW = 1.5A (Note 6) 1.8 2.5 V BOOST Pin Current ISW = 1.5A 30 50 mA BOOST Schottky Diode Drop I = 170mA 700 mV Switch 2 (1.5A BOOST) FB2 Voltage ● 1.20 1.19 1.22 1.24 1.25 V V FB2 Voltage Line Regulation 4.5V < VIN < 32V 0.01 0.03 %/V FB2 Pin Bias Current (Note 4) ● 30 200 nA Error Amplifier 2 Voltage Gain 250 V/V Error Amplifier 2 Transconductance ΔI = 10μA 220 μmhos Switch 2 Current Limit 1.5 1.85 2.3 A Switch 2 VCESAT ISW2 = 1.2A 360 mV Switch 2 Leakage Current FB2 = 1.5V 0.1 1 μA BIAS Pin Current Due to SW2 ISW2 = 1.2A 45 mA Maximum Duty Cycle (SW2) ● 75 90 % The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, BIAS = 3V, unless otherwise noted. |
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