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LTC1644CGN Datasheet(PDF) 2 Page - Linear Technology |
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LTC1644CGN Datasheet(HTML) 2 Page - Linear Technology |
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2 / 24 page  LTC1644 2 1644f Supply Voltages 12VIN ................................................................ 13.2V VEEIN .................................................................. –14V Input Voltages (Pins 5, 9) .......................– 0.3V to 13.5V Output Voltages (Pins 6, 7, 10) ..............– 0.3V to 13.5V Analog Voltages and Currents Pins 3, 11 to 14, 16 to 18 ...................– 0.3V to 13.5V Pins 4, 15 ............................. – 0.3V to (12VIN + 0.3V) VEEOUT ...................................................– 14V to 0.3V 12VOUT ...............................................– 0.3V to 13.2V Operating Temperature Range LTC1644C ............................................... 0 °C to 70°C LTC1644I ............................................ – 40 °C to 85°C Storage Temperature Range ................. – 65 °C to 150°C Lead Temperature (Soldering, 10 sec).................. 300 °C ORDER PART NUMBER TJMAX = 140°C, θJA = 135°C/W Consult LTC Marketing for parts specified with wider operating temperature ranges. LTC1644CGN LTC1644IGN ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. V12VIN = 12V, VEEIN = –12V, V3VIN = 3.3V, V5VIN = 5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IDD V12VIN Supply Current OFF/ON = 0V q 38 mA VLKO Undervoltage Lockout 12VIN, Ramping Down q 6.00 8.30 10.80 V 3VIN, 5VIN, Ramping Down q 2.25 2.48 2.75 V VFB Foldback Current Limit Voltage VFB = (V5VIN – V5VSENSE), V5VOUT = 0V, TIMER = 0V q 812 15 mV VFB = (V5VIN – V5VSENSE), V5VOUT = 3V, TIMER = 0V q 40 51 70 mV VFB = (V3VIN – V3VSENSE), V3VOUT = 0V, TIMER = 0V q 812 15 mV VFB = (V3VIN – V3VSENSE), V3VOUT = 2V, TIMER = 0V q 40 51 70 mV VCB Circuit Breaker Trip Voltage VCB = (V5VIN – V5VSENSE), TIMER = FLOAT q 40 55 70 mV VCB = (V3VIN – V3VSENSE), TIMER = FLOAT q 40 55 70 mV tOC Overcurrent Fault Response Time (V5VIN – V5VSENSE) = 100mV, TIMER = FLOAT q 30 45 60 µs (V3VIN – V3VSENSE) = 100mV, TIMER = FLOAT q 30 45 60 µs tSC Short-Circuit Response Time (V5VIN – V5VSENSE) = 200mV, TIMER = FLOAT q 0.1 1.0 µs (V3VIN – V3VSENSE) = 200mV, TIMER = FLOAT q 0.1 1.0 µs ICP GATE Pin Output Current OFF/ON = 0V, VGATE = 0V, TIMER = 0V q – 20 – 65 –100 µA VGATE = 5V, OFF/ON = 4V 100 225 300 µA OFF/ON = 0V, VGATE = 2V, TIMER = FLOAT, FAULT = 0V q 310 20 mA ∆VGATE External Gate Voltage ∆VGATE = (V12VIN – VGATE), IGATE = –1µA q 50 200 mV VDROP Internal Switch Voltage Drop VDROP = (V12VIN – V12VOUT), I = 500mA q 200 600 mV VDROP = (VEEOUT – VEEIN), IEE = 100mA q 110 250 mV ICL Current Foldback 12VIN = 12V, 12VOUT = 0V, TIMER = 0V q – 50 –360 – 600 mA 12VIN = 12V, 12VOUT = 10V, TIMER = 0V q – 525 – 840 – 1500 mA VEEIN = –12V, VEEOUT = 0V, TIMER = 0V q 20 100 300 mA VEEIN = –12V, VEEOUT = –10V, TIMER = 0V q 200 320 650 mA TTS Thermal Shutdown Temperature 130 °C 1 2 3 4 5 6 7 8 9 10 TOP VIEW GN PACKAGE 20-LEAD PLASTIC SSOP 20 19 18 17 16 15 14 13 12 11 12VIN VEEIN 5VOUT TIMER OFF/ON FAULT PWRGD GND RESETIN RESETOUT 12VOUT VEEOUT 3VOUT 3VIN 3VSENSE GATE 5VSENSE 5VIN PRECHARGE DRIVE |
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