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LM5115MTC/NOPB Datasheet(PDF) 5 Page - Texas Instruments |
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LM5115MTC/NOPB Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 24 page  LM5115 www.ti.com SNVS343E – MARCH 2005 – REVISED MARCH 2013 Electrical Characteristics (continued) Unless otherwise specified, TJ = –40°C to +125°C, VBIAS = 12V, No Load on LO or HO. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS FB Input Bias Current FB = 2V 0.2 0.5 µA COMP Source Current 300 µA Open Loop Voltage Gain 60 dB GBW Gain Bandwidth Product 4 MHz Vio Input Offset Voltage -7 0 7 mV COMP Offset Threshold for VHO = high RAMP = CS = 2 V VOUT = 0V RAMP Offset Threshold for VHO = high COMP = 1.5V, 1.1 V CS = VOUT = 0V CURRENT SENSE AMPLIFIER Current Sense Amplifier Gain 16 V/V Output DC Offset 1.27 V Amplifier Bandwidth 500 kHz CURRENT LIMIT ILIMIT Amp Transconductance 16 mA / V Overall Transconductance 237 mA / V Positive Current Limit VCL = VCS - VVOUT 37 45 53 mV VOUT = 6V and CO/COMP = 1.5V Positive Current Limit Foldback VCL = VCS - VVOUT 31 38 45 mV VOUT = 0V and CO/COMP = 1.5V VCLneg Negative Current Limit VOUT = 6V -17 mV VCL = VCS - VVOUT to cause LO to shutoff RAMP GENERATOR SYNC Input Impedance 2.5 k Ω SYNC Threshold End of cycle detection threshold 15 µA Free Run Mode Peak Threshold RAMP peak voltage with dc current 2.3 V applied to SYNC. Current Mirror Gain Ratio of RAMP charge current to SYNC 2.7 3.3 A/A input current. Discharge Impedance 100 Ω LOW SIDE GATE DRIVER VOLL LO Low-state Output Voltage ILO = 100mA 0.2 0.5 V VOHL LO High-state Output Voltage ILO = -100mA, VOHL = VCC -VLO 0.4 0.8 V LO Rise Time CLOAD = 1000pF 15 ns LO Fall Time CLOAD = 1000pF 12 ns IOHL Peak LO Source Current VLO = 0V 2 A IOLL Peak LO Sink Current VLO = 12V 2.5 A HIGH SIDE GATE DRIVER VOLH HO Low-state Output Voltage IHO = 100mA 0.2 0.5 V VOHH HO High-state Output Voltage IHO = -100mA, VOHH = VHB –VHO 0.4 0.8 V HO Rise Time CLOAD = 1000pF 15 ns HO High Side Fall Time CLOAD = 1000pF 12 ns IOHH Peak HO Source Current VHO = 0V 2 A IOLH Peak HO Sink Current VHO = 12V 2.5 A SWITCHING CHARACTERISITCS LO Fall to HO Rise Delay CLOAD = 0 70 ns HO Fall to LO Rise Delay CLOAD = 0 50 ns SYNC Fall to HO Fall Delay CLOAD = 0 120 ns Copyright © 2005–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM5115 |
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