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LT1737 Datasheet(PDF) 2 Page - Linear Technology |
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LT1737 Datasheet(HTML) 2 Page - Linear Technology |
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2 / 28 page  2 LT1737 1737f (Note 1) VCC Supply Voltage ................................................. 22V UVLO Pin Voltage .................................................... VCC ISENSE Pin Voltage .................................................... 2V FB Pin Current ..................................................... ±2mA Operating Junction Temperature Range LT1737C ............................................... 0 °C to 100°C LT1737I ............................................ –40 °C to 125°C Storage Temperature Range ................ – 65 °C to 150°C Lead Temperature (Soldering, 10 sec)................ 300 °C ORDER PART NUMBER LT1737CGN LT1737CS LT1737IGN LT1737IS TJMAX = 125°C, θJA = 110°C/W (GN) TJMAX = 125°C, θJA = 110°C/W (SO) PACKAGE/ORDER I FOR ATIO ABSOLUTE AXI U RATI GS TOP VIEW S PACKAGE 16-LEAD PLASTIC SO GN PACKAGE 16-LEAD PLASTIC SSOP 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 PGND ISENSE SFST ROCMP RCMPC OSCAP VC FB GATE VCC tON ENDLY MINENAB SGND UVLO 3VOUT The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 14V, GATE open, VC = 1.4V unless otherwise noted. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Power Supply VCC(MIN) Minimum Input Voltage q 4.1 4.5 V ICC Supply Current VC = Open q 10 15 mA Shutdown Current VUVLO = 0V, VC = Open q 50 150 µA Feedback Amplifier VFB Feedback Voltage 1.230 1.245 1.260 V q 1.220 1.270 V IFB Feedback Pin Input Current 500 nA gm Feedback Amplifier Transconductance ∆lC = ±10µA q 400 1000 1800 µmho ISRC, ISNK Feedback Amplifier Source or Sink Current q 30 50 80 µA VCL Feedback Amplifier Clamp Voltage 2.5 V Reference Voltage/Current Line Regulation 4.75V ≤ VIN ≤ 18V q 0.01 0.05 %/V Voltage Gain VC = 1V to 2V 2000 V/V Soft-Start Charging Current VSFST = 0V 25 40 50 µA Soft-Start Discharge Current VSFST = 1.5V, VUVLO = 0V 0.8 1.5 mA Gate Output VGATE Output High Level IGATE = 100mA q 11.5 12.1 V IGATE = 500mA q 11.0 11.8 V Output Low Level IGATE = 100mA q 0.3 0.45 V IGATE = 500mA q 0.6 1.0 V IGATE Output Sink Current in Shutdown, VUVLO = 0V VGATE = 2V q 1.2 2.5 mA tr Rise Time CL = 1000pF 30 ns tf Fall Time CL = 1000pF 30 ns GN PART MARKING 1737 1737I Consult LTC Marketing for parts specified with wider operating temperature ranges. |
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