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LT1931 数据表(PDF) 2 Page - Linear Technology |
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LT1931 数据表(HTML) 2 Page - Linear Technology |
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2 / 12 page  2 LT1931/LT1931A 1931fa LT1931 LT1931A PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Minimum Operating Voltage 2.45 2.6 2.45 2.6 V Maximum Operating Voltage 16 16 V Feedback Voltage – 1.275 – 1.255 – 1.235 –1.275 –1.255 –1.235 V ● – 1.280 – 1.230 –1.280 –1.230 V NFB Pin Bias Current VNFB = –1.255V ● 48 8 16 µA Quiescent Current VSHDN = 2.4V, Not Switching 4.2 6 5.8 8 mA Quiescent Current in Shutdown VSHDN = 0V, VIN = 3V 0.01 1 0.01 1 µA Reference Line Regulation 2.6V ≤ VIN ≤ 16V 0.01 0.05 0.01 0.05 %/V Switching Frequency 1 1.2 1.4 1.8 2.2 2.6 MHz ● 0.85 1.6 1.6 2.9 MHz Maximum Duty Cycle ● 84 90 75 82 % Switch Current Limit (Note 3) 1 1.2 2 1 1.2 2.5 A Switch VCESAT ISW = 1A 400 600 400 600 mV Switch Leakage Current VSW = 5V 0.01 1 0.01 1 µA SHDN Input Voltage, High 2.4 2.4 V SHDN Input Voltage, Low 0.5 0.5 V SHDN Pin Bias Current VSHDN = 3V 16 32 35 70 µA VSHDN = 0V 0 0.1 0 0.1 µA (Note 1) VIN Voltage .............................................................. 16V SW Voltage ................................................– 0.4V to 36V NFB Voltage ............................................................. – 2V Current Into NFB Pin ............................................ ±1mA SHDN Voltage .......................................................... 16V Maximum 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 ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. VIN = 3V, VSHDN = VIN, unless otherwise noted. (Note 2) ELECTRICAL CHARACTERISTICS Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LT1931E/LT1931AE are guaranteed to meet performance specifications from 0 °C to 70°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. LT1931I/LT1931AI are guaranteed over the –40 °C to 85°C temperature range. Note 3: Current limit guaranteed by design and/or correlation to static test. TJMAX = 125°C, θJA = 150°C/ W ORDER PART NUMBER S5 PART MARKING Consult LTC Marketing for parts specified with wider operating temperature ranges. LT1931ES5 LT1931AES5 LT1931IS5 LT1931AIS5 LTRA LTSP LTBZF LTBZG Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ SW 1 GND 2 TOP VIEW S5 PACKAGE 5-LEAD PLASTIC TSOT-23 NFB 3 5 VIN 4 SHDN |
类似零件编号 - LT1931 |
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类似说明 - LT1931 |
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