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LT1776CS8 Datasheet(PDF) 2 Page - Linear Technology |
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LT1776CS8 Datasheet(HTML) 2 Page - Linear Technology |
2 / 20 page 2 LT1776 ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage (Note 5) .......................................... 60V Switch Voltage (Note 5) ........................................... 60V SHDN, SYNC Pin Voltage ........................................... 7V VCC Pin Voltage ....................................................... 30V FB Pin Voltage ........................................................... 3V Operating Junction Temperature Range LT1776C ................................................ 0 °C to 125°C LT1776I ............................................ – 40 °C to 125°C Storage Temperature Range ................. – 65 °C to 150°C Lead Temperature (Soldering, 10 sec).................. 300 °C PACKAGE/ORDER INFORMATION ORDER PART NUMBER LT1776CN8 LT1776CS8 LT1776IN8 LT1776IS8 S8 PART MARKING 1776 1776I Consult factory for Military grade parts. VIN = 40V, VSW open, VCC = 5V, VC = 1.4V unless otherwise noted. The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supplies VIN(MIN) Minimum Input Voltage 6.7 7.0 V q 7.4 V Thermally Limited Continuous Operating Voltage q 40 V IVIN VIN Supply Current VC = 0V 620 800 µA q 900 µA IVCC VCC Supply Current VC = 0V 3.2 4.0 mA q 5.0 mA VVCC VCC Dropout Voltage (Note 2) 2.8 3.1 V Shutdown Mode IVIN VSHDN = 0V 30 50 µA q 75 µA Feedback Amplifier VREF Reference Voltage 1.225 1.240 1.255 V q 1.215 1.265 V IIN FB Pin Input Bias Current 600 1500 nA gm Feedback Amplifier Transconductance ∆lc = ±10µA 400 650 1000 µmho q 200 1500 µmho ISRC, ISNK Feedback Amplifier Source or Sink Current 60 100 170 µA q 45 220 µA VCL Feedback Amplifier Clamp Voltage 2.0 V Reference Voltage Line Regulation 12V ≤ VIN ≤ 60V q 0.01 %/V Voltage Gain 200 600 V/V Output Switch VON Output Switch On Voltage ISW = 0.5A 1.0 1.5 V ILIM Switch Current Limit (Note 3) q 0.55 0.70 1.0 A Current Amplifier Control Pin Threshold Duty Cycle = 0% 0.9 1.1 1.25 V Control Voltage to Switch Transconductance 2 A/V TJMAX = 125°C, θJA = 130°C/ W (N8) TJMAX = 125°C, θJA = 110°C/ W (S8) 1 2 3 4 8 7 6 5 TOP VIEW VC FB SYNC VIN SHDN VCC VSW GND N8 PACKAGE 8-LEAD PDIP S8 PACKAGE 8-LEAD PLASTIC SO |
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