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LTC1909-8 Datasheet(PDF) 2 Page - Linear Technology |
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LTC1909-8 Datasheet(HTML) 2 Page - Linear Technology |
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2 / 32 page  2 LTC1909-8 19098f (Note 1) Input Supply Voltage VIN, ION ..................................................– 0.3V to 36V Boosted Topside Driver Supply Voltage BOOST .................................................. – 0.3V to 42V SW, SENSE+ Voltages ................................. – 5V to 36V EXTVCC, (BOOST – SW), RUN/SS, PGOOD, INTVCC, SEL, SDA, SCL, VRON, PGTMR, VOSENSE, FB, CPUON, VCC Voltages .......................... – 0.3V to 7V FCB, VON, VRNG Voltages ....... – 0.3V to (INTVCC + 0.3V) ITH, VFB Voltages...................................... –0.3V to 2.7V TG, BG, INTVCC, EXTVCC Peak Currents .................... 2A TG, BG, INTVCC, EXTVCC RMS Currents .............. 50mA Operating Ambient Temperature Range LTC1909-8EG (Note 2) ....................... – 40 °C to 85°C Junction Temperature (Note 4) ............................ 125 °C Storage Temperature Range ................. – 65 °C to 150°C Lead Temperature (Soldering, 10 sec).................. 300 °C ORDER PART NUMBER LTC1909-8EG TJMAX = 125°C, θJA = 95°C/ W (Switching Regulator Controller) The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. VIN = 15V unless otherwise noted. ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO ELECTRICAL CHARACTERISTICS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 TOP VIEW G PACKAGE 28-LEAD PLASTIC SSOP 28 27 26 25 24 23 22 21 20 19 18 17 16 15 RUN/SS VON PGOOD VRNG FCB ITH SGND ION VFB SEL SDA SCL VRON PGTMR BOOST TG SW SENSE+ PGND BG INTVCC VIN EXTVCC VCC GND FB VOSENSE CPUON Consult LTC Marketing for parts specified with wider operating temperature ranges. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loop IQ Input DC Supply Current Normal 900 2000 µA Shutdown Supply Current 15 30 µA VFB Feedback Reference Voltage ITH = 1.2V (Note 3) q 0.792 0.800 0.808 V ∆VFB(LINEREG) Feedback Voltage Line Regulation VIN = 4V to 30V, ITH = 1.2V (Note 3) 0.002 %/V ∆VFB(LOADREG) Feedback Voltage Load Regulation ITH = 0.5V to 1.9V (Note 3) q – 0.05 – 0.3 % IFB Feedback Input Current VFB = 0.8V –5 ±50 nA gm(EA) Error Amplifier Transconductance ITH = 1.2V (Note 3) q 1.4 1.7 2 mS VFCB Forced Continuous Threshold q 0.76 0.8 0.84 V IFCB Forced Continuous Pin Current VFCB = 0.8V – 1 – 2 µA tON On-Time ION = 60µA, VON = 1.5V 212 250 288 ns ION = 30µA, VON = 1.5V 425 500 575 ns tON(MIN) Minimum On-Time ION = 180µA, VON = 0V 50 100 ns tOFF(MIN) Minimum Off-Time ION = 60µA, VON = 1.5V 250 400 ns VSENSE(MAX) Maximum Current Sense Threshold VRNG = 1V, VFB = 0.76V 113 133 153 mV VPGND – VSENSE+ VRNG = 0V, VFB = 0.76V q 79 93 107 mV VRNG = INTVCC, VFB = 0.76V 158 186 214 mV VSENSE(MIN) Minimum Current Sense Threshold VRNG = 1V, VFB = 0.84V – 67 mV VPGND – VSENSE+ VRNG = 0V, VFB = 0.84V – 47 mV VRNG = INTVCC, VFB = 0.84V – 93 mV ∆VFB(OV) Output Overvoltage Fault Threshold 5.5 7.5 9.5 % |
Similar Part No. - LTC1909-8 |
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Similar Description - LTC1909-8 |
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