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LTC3350 Datasheet(PDF) 4 Page - Linear Technology |
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LTC3350 Datasheet(HTML) 4 Page - Linear Technology |
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4 / 46 page  LTC3350 4 3350fc For more information www.linear.com/LTC3350 elecTrical characTerisTics The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = VOUT = 12V, VDRVCC = VINTVCC unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Switching Regulator VIN Input Supply Voltage l 4.5 35 V IQ Input Quiescent Current (Note 4) 4 mA VCAPFBHI Maximum Regulated VCAP Feedback Voltage VCAPDAC Full Scale (1111b) l 1.188 1.176 1.200 1.200 1.212 1.224 V V VCAPFBLO Minimum Regulated VCAP Feedback Voltage VCAPDAC Zero Scale (0000b) 0.628 0.638 0.647 V ICAPFB CAPFB Input Leakage Current VCAPFB = 1.2V l –50 50 nA VOUTFB Regulated VOUT Feedback Voltage l 1.188 1.176 1.200 1.200 1.212 1.224 V V VOUTFB(TH) OUTFET Turn-Off Threshold Falling Threshold 1.27 1.3 1.33 V IOUTFB OUTFB Input Leakage Current VOUTFB = 1.2V l –50 50 nA VOUTBST VOUT Voltage in Step-Up Mode VIN = 0V l 4.5 35 V VUVLO INTVCC Undervoltage Lockout Rising Threshold Falling Threshold l l 3.85 4.3 4 4.45 V V VDRVUVLO DRVCC Undervoltage Lockout Rising Threshold Falling Threshold l l 3.75 4.2 3.9 4.35 V V VDUVLO VIN – VCAP Differential Undervoltage Lockout Rising Threshold Falling Threshold l l 145 55 185 90 225 125 mV mV VOVLO VIN Overvoltage Lockout Rising Threshold Falling Threshold l l 37.7 36.3 38.6 37.2 39.5 38.1 V V VVCAPP5 Charge Pump Output Voltage Relative to VCAP, 0V ≤ VCAP ≤ 20V 5 V Input Current Sense Amplifier VSNSI Regulated Input Current Sense Voltage (VOUTSP – VOUTSN) l 31.36 31.04 32.00 32.00 32.64 32.96 mV mV Charge Current Sense Amplifier VSNSC Regulated Charge Current Sense Voltage (ICAP – VCAP) VCAP = 10V l 31.36 31.04 32.00 32.00 32.64 32.96 mV mV VCMC Common Mode Range (ICAP, VCAP) 0 20 V VPEAK Peak Inductor Current Sense Voltage l 51 58 65 mV VREV Reverse Inductor Current Sense Voltage Step-Down Mode l 3.867 7 10 mV IICAP ICAP Pin Current Step-Down Mode, VSNSC = 32mV Step-Up Mode, VSNSC = 32mV 30 135 µA µA Error Amplifier gMV VCAP Voltage Loop Transconductance 1 mmho gMC Charge Current Loop Transconductance 64 μmho gMI Input Current Loop Transconductance 64 μmho gMO VOUT Voltage Loop Transconductance 400 μmho Oscillator fSW Switching Frequency RT = 107k l 495 490 500 500 505 510 kHz kHz Maximum Programmable Frequency RT = 53.6k 1 MHz Minimum Programmable Frequency RT = 267k 200 kHz |
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