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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LT1738 датащи(PDF) 2 Page - Linear Technology |
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LT1738 датащи(HTML) 2 Page - Linear Technology |
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2 / 20 page  2 LT1738 1738fa (Note 1) Supply Voltage (VIN) ................................................ 20V Gate Drive Current ..................................... Internal Limit V5 Current ................................................. Internal Limit SHDN Pin Voltage .................................................... 20V Feedback Pin Voltage (Trans. 10ms) ...................... ±10V Feedback Pin Current ............................................ 10mA Negative Feedback Pin Voltage (Trans. 10ms) ........ ±10V CS Pin .......................................................................... 5V GCL Pin ..................................................................... 16V SS Pin .......................................................................... 3V Operating Junction Temperature Range (Note 3) ............................................ – 40 °C to 125°C Storage Temperature Range ................. – 65 °C to 150°C Lead Temperature (Soldering, 10 sec).................. 300 °C ORDER PART NUMBER LT1738EG LT1738IG TJMAX = 150°C, θJA = 110°C/ W ELECTRICAL CHARACTERISTICS ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VC = 0.9V, VFB = VREF, RVSL, RCSL = 16.9k, RT = 16.9k and other pins open unless otherwise noted. 1 2 3 4 5 6 7 8 9 10 TOP VIEW G PACKAGE 20-LEAD PLASTIC SSOP 20 19 18 17 16 15 14 13 12 11 GATE CAP GCL CS V5 SYNC CT RT FB NFB PGND NC NC VIN RVSL RCSL SHDN SS VC GND SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Error Amplifiers VREF Reference Voltage Measured at Feedback Pin q 1.235 1.250 1.265 V IFB Feedback Input Current VFB = VREF q 250 1000 nA FBREG Reference Voltage Line Regulation 2.7V ≤ VIN ≤ 20V q 0.012 0.03 %/V VNFR Negative Feedback Reference Voltage Measured at Negative Feedback Pin q –2.56 – 2.50 –2.45 V with Feedback Pin Open INFR Negative Feedback Input Current VNFB = VNFR –37 – 25 µA NFBREG Negative Feedback Reference Voltage Line Regulation 2.7V ≤ VIN ≤ 20V q 0.009 0.03 %/V gm Error Amplifier Transconductance ∆IC = ±50µA 1100 1500 2200 µmho q 700 2500 µmho IESK Error Amp Sink Current VFB = VREF + 150mV, VC = 0.9V q 120 200 350 µA IESRC Error Amp Source Current VFB = VREF – 150mV, VC = 0.9V q 120 200 350 µA VCLH Error Amp Clamp Voltage High Clamp, VFB = 1V 1.27 V VCLL Error Amp Clamp Voltage Low Clamp, VFB = 1.5V 0.12 V AV Error Amplifier Voltage Gain 180 250 V/V FBOV FB Overvoltage Shutdown Outputs Drivers Disabled 1.47 V ISS Soft-Start Charge Current VSS = 1V 9.0 12 µA Consult LTC Marketing for parts specified with wider operating temperature ranges. |
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