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LTC1775IS Datasheet(PDF) 2 Page - Linear Technology |
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LTC1775IS Datasheet(HTML) 2 Page - Linear Technology |
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2 / 24 page  2 LTC1775 (Note 1) Input Supply Voltage (VIN, TK) ................. 36V to –0.3V Boosted Supply Voltage (BOOST) ............. 42V to – 0.3V Boosted Driver Voltage (BOOST – SW) ...... 7V to – 0.3V Switch Voltage (SW) ....................................36V to – 5V EXTVCC Voltage ...........................................7V to –0.3V ITH Voltage ................................................2.7V to –0.3V FCB, RUN/SS, SYNC Voltages .....................7V to – 0.3V VOSENSE, VPROG Voltages ........(INTVCC + 0.3V) to –0.3V Peak Driver Output Current < 10 µs (TG, BG) ............ 2A INTVCC Output Current ........................................ 50mA Operating Ambient Temperature Range LTC1775C .............................................. 0 °C to 70°C LTC1775I (Note 5) .............................. – 40 °C to 85°C Junction Temperature (Note 2) ............................. 125 °C Storage Temperature Range ................ – 65 °C to 150°C Lead Temperature (Soldering, 10 sec)................. 300 °C SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loop IINVOSENSE Feedback Current VPROG Pin Open, ITH = 1.19V (Note 3) 10 50 nA VOUT Regulated Output Voltage ITH = 1.19V (Note 3) 1.19V (Adjustable) Selected VPROG Pin Open q 1.178 1.190 1.202 V 3.3V Selected VPROG = 0V q 3.220 3.300 3.380 V 5V Selected VPROG = INTVCC q 4.900 5.000 5.100 V VLINEREG Reference Voltage Line Regulation VIN = 4V to 20V, ITH = 1.19V (Note 3), 0.001 0.01 %/V VPROG Pin Open VLOADREG Output Voltage Load Regulation ITH = 2V (Note 3) q – 0.020 – 0.2 % ITH = 0.5V (Note 3) q 0.035 0.2 % VFCB Forced Continuous Threshold VFCB Ramping Negative q 1.16 1.19 1.22 V IFCB Forced Continuous Bias Current VFCB = 1.19V – 1 – 2 µA VOVL Output Overvoltage Lockout VPROG Pin Open 1.24 1.28 1.32 V IPROG VPROG Input Current 3.3V VOUT VPROG = 0V – 3.5 – 7 µA 5V VOUT VPROG = 5V 3.5 7 µA IQ Input DC Supply Current Normal Mode EXTVCC = 5V (Note 4) 500 µA Shutdown VRUN/SS = 0V, 4V < VIN < 15V 15 30 µA VRUN/SS RUN/SS Pin Threshold q 0.8 1.4 2 V IRUN/SS Soft Start Current Source VRUN/SS = 0V –1.2 –2.5 –4 µA ∆VSENSE(MAX) Maximum Current Sense Threshold VOSENSE = 1V, VPROG Pin Open 260 300 340 mV ORDER PART NUMBER LTC1775CGN LTC1775CS LTC1775IGN LTC1775IS Consult factory for Military grade parts. TJMAX = 125°C, θJA = 130°C/W (GN) TJMAX = 125°C, θJA = 110°C/W (S) The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 15V unless otherwise noted. TOP VIEW S PACKAGE 16-LEAD PLASTIC SO GN PACKAGE 16-LEAD NARROW PLASTIC SSOP 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 EXTVCC SYNC RUN/SS FCB ITH SGND VOSENSE VPROG VIN TK SW TG BOOST INTVCC BG PGND GN PART MARKING 1775 1775I ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO ELECTRICAL CHARACTERISTICS |
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