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LT1302CN8-5 Datasheet(PDF) 2 Page - Linear Technology |
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LT1302CN8-5 Datasheet(HTML) 2 Page - Linear Technology |
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2 / 16 page  2 LT1302/LT1302-5 A G A U A R BSOLUTEXI TI S PACKAGE/ORDER I FOR ATIO VIN Voltage ............................................................. 10V SW Voltage ............................................................. 25V FB Voltage .............................................................. 10V SHDN Voltage ......................................................... 10V VC Voltage ................................................................ 4V IT Voltage .................................................................. 4V Maximum Power Dissipation ............................ 700mW Operating Temperature Range .................... 0 °C to 70°C Storage Temperature Range ............... – 65 °C to 150°C Lead Temperature (Soldering, 10 sec)................. 300 °C Consult factory for Industrial and Military grade parts. ORDER PART NUMBER LT1302CN8 LT1302CS8 LT1302CN8-5 LT1302CS8-5 S8 PART MARKING 1302 13025 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IQ Quiescent Current VSHDN = 0.5V, VFB = 1.3V q 200 300 µA VSHDN = 1.8V q 15 25 µA VIN Input Voltage Range 2.0 V q 2.2 8 V VFB Feedback Voltage (LT1302) VC = 0.4V q 1.22 1.24 1.26 V Feedback Pin Bias Current (LT1302) VFB = 1V 100 nA Output Sense Voltage (LT1302-5) VC = 0.4V q 4.85 5.05 5.25 V Output Ripple Voltage (LT1302-5) VC = 0.4V 50 mV Sense Pin Resistance to Ground (LT1302-5) 420 k Ω VOS Offset Voltage See Block Diagram 15 mV Comparator Hysteresis (Note 1) 5 mV Oscillator Frequency Current Limit Not Asserted (Note 2) 175 220 265 kHz q 160 310 kHZ DC Maximum Duty Cycle 75 86 95 % tON Switch On Time Current Limit Not Asserted 3.9 µs tOFF Switch Off Time 0.7 µs Output Line Regulation 2 < VIN < 8V q 0.06 0.15 %/V VCESAT Switch Saturation Voltage ISW = 2A 310 400 mV q 475 mV Switch Leakage Current VSW = 5V, Switch Off q 0.1 10 µA Switch Current Limit VC = 0.4V (Burst Mode Operation) 1 A VC = 1.25V (Full Power) (Note 3) q 2.0 2.8 3.9 A Error Amplifier Voltage Gain 0.9V ≤ VC ≤ 1.2V, ∆VC/∆VFB 50 75 V/ V VSHDNH Shutdown Pin High q 1.8 V VSHDNL Shutdown Pin Low q 0.5 V ISHDN Shutdown Pin Bias Current VSHDN = 5V q 820 µA VSHDN = 2V 3 µA VSHDN = 0V q 0.1 1 µA IT Pin Resistance to Ground 3.9 k Ω TA = 25°C, VIN = 2.5V, unless otherwise noted. ELECTRICAL C C HARA TERISTICS C D The q denotes specifications which apply over the 0 °C to 70°C temperature range. Note 1: Hysteresis is specified at DC. Output ripple depends on capacitor size and ESR. Note 2: The LT1302 operates in a variable frequency mode. Switching frequency depends on load inductance and operating conditions and may be above specified limits. Note 3: Minimum switch current 100% tested. Maximum switch current guaranteed by design. 1 2 3 4 8 7 6 5 TOP VIEW GND VC SHDN (SENSE*)FB PGND SW VIN IT N8 PACKAGE 8-LEAD PDIP S8 PACKAGE 8-LEAD PLASTIC SO *FIXED VERSION PINS 1 AND 8 ARE INTERNALLY CONNECTED IN SOIC PACKAGE TJMAX = 125°C, θJA = 100°C/W (N8) TJMAX = 125°C, θJA = 80°C/W (S8) |
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