LTC3613 TheELECTRICAL CHARACTERISTICS l denotes the specifications which apply over the specified operatingjunction temperature range, otherwise specifications are at T+–A = 25°C. SVIN = 15V, VFB = VOSNS – VOSNS , unless otherwise noted. (Note 4)SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSMain Control Loop VIN Input Voltage Operating Range l 4.5 24 V VOUT Output Voltage Operating Range l 0.6 5.5 V IQ Input DC Supply Current Normal MODE/PLLIN = INTVCC 2 4 mA Shutdown Supply Current RUN = 0V 15 25 μA VREG Regulated Differential Feedback Voltage ITH = 1.2V (Note 3) (V + – OSNS – VOSNS ) TA = 25°C 0.5985 0.6 0.6015 V TA = 0°C to 85°C l 0.596 0.6 0.604 V TA = –40°C to 125°C l 0.594 0.6 0.606 V Regulated Differential Feedback VIN = 4.5V to 24V, ITH = 0.5V to 1.9V, Voltage Over Line, Load and Common Mode V – OSNS = ±500mV (Note 3) (V + – OSNS – VOSNS ) TA = 0°C to 85°C l 0.594 0.6 0.606 V TA = –40°C to 125°C l 0.591 0.6 0.609 V tON(MIN) Minimum On-Time 65 ns tOFF(MIN) Minimum Off-Time 105 ns gm(EA) Error Amplifier Transconductance ITH = 1.2V (Note 3) l 1.4 1.7 2 mS VSENSE(MAX) Valley Current Sense Threshold, VRNG = 2V, VFB = 0.57V l 80 100 120 mV V + – SENSE – VSENSE , VRNG = 0V, VFB = 0.57V l 22 30 38 mV Peak Current = Valley + Ripple VRNG = INTVCC, VFB = 0.57V l 39 50 61 mV V + SENSE(MIN) Minimum Current Sense Threshold,VSENSE – VRNG = 2V, VFB = 0.63V –50 mV V – SENSE , Force Continuous Operation VRNG = 0V, VFB = 0.63V –15 mV VRNG = INTVCC, VFB = 0.63V –25 mV VSENSE(CM) SENSE+, SENSE– Voltage Range (Common l –0.5 5.5 V Mode) ISENSE SENSE+, SENSE– Input Bias Current VSENSE(CM) = 0.6V ±5 ±50 nA VSENSE(CM) = 5V 1 4 μA VRUN(TH) RUN Pin On Threshold VRUN Rising l 1.1 1.2 1.3 V VRUN(HYS) RUN Pin Hysteresis 80 mV ISS Soft-Start Charging Current VTRACKSS = 0V 1.0 μA UVLO INTVCC Undervoltage Lockout Falling l 3.4 3.65 4.0 V INTVCC Undervoltage Lockout Release Rising l 4.2 4.5 V I + + VOSNS VOSNS Input Bias Current VFB = 0.6V ±5 ±25 nA I – – VOSNS VOSNS Input Bias Current VFB = 0.6V –15 –50 μA 3613fa 3
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