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LT1945 Datasheet(PDF) 2 Page - Linear Technology |
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LT1945 Datasheet(HTML) 2 Page - Linear Technology |
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2 / 8 page  LT1945 2 1945fa PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS VIN, SHDN1, SHDN2 Voltage.....................................15V SW1, SW2 Voltage....................................................36V NFB1 Voltage ............................................................–3V FB2 Voltage............................................................... VIN Current into NFB1 Pin ............................................–1mA Current into FB2 Pin................................................1mA Junction Temperature ........................................... 125°C Operating Temperature Range (Note 2).... –40°C to 85°C Storage Temperature Range................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) .................. 300°C (Note 1) 1 2 3 4 5 NFB1 SHDN1 GND SHDN2 FB2 10 9 8 7 6 SW1 PGND VIN PGND SW2 TOP VIEW MS PACKAGE 10-LEAD PLASTIC MSOP TJMAX = 125°C, θJA = 160°C/W ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT1945EMS#PBF LT1945EMS#TRPBF LTTS 10-Lead Plastic MSOP –40°C to 85°C LT1945IMS#PBF LT1945IMS#TRPBF LTTS 10-Lead Plastic MSOP –40°C to 125°C LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT1945EMS LT1945EMS#TR LTTS 10-Lead Plastic MSOP –40°C to 85°C LT1945IMS LT1945IMS#TR LTTS 10-Lead Plastic MSOP –40°C to 125°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ PARAMETER CONDITIONS MIN TYP MAX UNITS Minimum Input Voltage 1.2 V Quiescent Current, (per Converter) Not Switching VSHDN = 0V 20 30 1 μA μA NFB1 Comparator Trip Point –40°C < TJ < 85°C –40°C < TJ < 125°C –1.205 –1.195 –1.23 –1.255 1.255 V V FB2 Comparator Trip Point –40°C < TJ < 85°C –40°C < TJ < 125°C 1.205 1.195 1.23 1.255 1.255 V V FB Comparator Hysteresis 8mV NFB1, FB2 Voltage Line Regulation 1.2V < VIN < 12V 0.05 0.1 %/V NFB1 Pin Bias Current (Note 3) VNFB1= –1.23V l 1.3 2 2.9 μA FB2 Pin Bias Current (Note 4) –40°C < TJ < 85°C –40°C < TJ < 125°C 30 80 300 nA nA Switch Off Time, Switcher 1 (Note 5) 400 ns Switch Off Time, Switcher 2 (Note 5) VFB2 > 1V VFB2 < 0.6V 400 1.5 ns μs Switch VCESAT ISW = 300mA 250 350 mV Switch Current Limit 250 350 400 mA ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 1.2V, VSHDN = 1.2V unless otherwise noted. |
Similar Part No. - LT1945_15 |
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Similar Description - LT1945_15 |
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