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LT1956EGN 数据表(PDF) 2 Page - Linear Technology |
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LT1956EGN 数据表(HTML) 2 Page - Linear Technology |
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2 / 28 page  2 LT1956/LT1956-5 1956f Input Voltage (VIN) ................................................. 60V BOOST Pin Above SW ............................................ 35V BOOST Pin Voltage ................................................. 68V SYNC, SENSE Voltage (LT1956-5) ........................... 7V SHDN Voltage ........................................................... 6V BIAS Pin Voltage .................................................... 30V FB Pin Voltage/Current (LT1956) ................... 3.5V/2mA ORDER PART NUMBER LT1956EGN LT1956IGN LT1956EGN-5 LT1956IGN-5 GN PART MARKING 1956 1956I 19565 1956I5 TJMAX = 125°C, θJA = 85°C/ W, θJC (PIN 8) = 25°C/ W FOUR CORNER PINS SOLDERED TO GROUND PLANE ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO GN PACKAGE 16-LEAD PLASTIC SSOP 1 2 3 4 5 6 7 8 TOP VIEW 16 15 14 13 12 11 10 9 GND SW NC VIN NC BOOST NC GND GND SHDN SYNC NC FB/SENSE VC BIAS GND Operating Junction Temperature Range LT1956EFE/LT1956EFE-5/LT1956EGN/LT1956EGN-5 (Notes 8, 10) ..................................... – 40 °C to 125°C LT1956IFE/LT1956IFE-5/LT1956IGN/LT1956IGN-5 (Notes 8, 10) ..................................... – 40 °C to 125°C Storage Temperature Range ................ – 65 °C to 150°C Lead Temperature (Soldering, 10 sec)................. 300 °C (Note 1) ORDER PART NUMBER LT1956EFE LT1956IFE LT1956EFE-5 LT1956IFE-5 FE PART MARKING TJMAX = 125°C, θJA = 45°C/ W, θJC (PAD) = 10°C/ W EXPOSED BACKSIDE MUST BE SOLDERED TO GROUND PLANE FE PACKAGE 16-LEAD PLASTIC TSSOP 1 2 3 4 5 6 7 8 TOP VIEW 16 15 14 13 12 11 10 9 GND SW NC VIN NC BOOST NC GND GND SHDN SYNC NC FB/SENSE VC BIAS GND Consult LTC Marketing for parts specified with wider operating temperature ranges. PARAMETER CONDITIONS MIN TYP MAX UNITS Reference Voltage (LT1956) 5.5V ≤ VIN ≤ 60V 1.204 1.219 1.234 V VOL + 0.2 ≤ VC ≤ VOH – 0.2 q 1.195 1.243 V SENSE Voltage (LT1956-5) 5.5V ≤ VIN ≤ 60V 4.94 5 5.06 V VOL + 0.2 ≤ VC ≤ VOH – 0.2 q 4.90 5.10 V SENSE Pin Resistance (LT1956-5) 9.5 13.8 19 k Ω FB Input Bias Current (LT1956) q 0.5 1.5 µA Error Amp Voltage Gain (Notes 2, 9) 200 400 V/V Error Amp gm dl (VC) = ±10µA (Note 9) 1500 2000 3000 µMho q 1000 3200 µMho VC to Switch gm 1.7 A/V EA Source Current FB = 1V or VSENSE = 4.1V q 125 225 400 µA EA Sink Current FB = 1.4V or VSENSE = 5.7V q 100 225 450 µA VC Switching Threshold Duty Cycle = 0 0.9 V VC High Clamp SHDN = 1V 2.1 V The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. VIN = 15V, VC = 1.5V, SHDN = 1V, Boost o/c, SW o/c, unless otherwise noted. ELECTRICAL CHARACTERISTICS 1956EFE 1956IFE 1956EFE-5 1956IFE-5 |
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