Datasheet LTC3704 (Analog Devices) - 2

LTC3704
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
VIN Voltage ... – 0.3V to 36V TOP VIEW INTVCC Voltage ... – 0.3V to 7V RUN 1 10 SENSE I 2 9 V INTV TH IN CC Output Current .. 50mA NFB 3 8 INTVCC GATE Voltage ... – 0.3V to V FREQ 4 7 GATE INTVCC + 0.3V MODE/ 5 6 GND I SYNC TH Voltage ... – 0.3V to 2.7V MS PACKAGE NFB Voltage .. –2.7V to 2.7V 10-LEAD PLASTIC MSOP RUN, MODE/SYNC Voltages ... – 0.3V to 7V TJMAX = 125°C, θJA = 120°C/ W FREQ Voltage ..– 0.3V to 1.5V ORDER PART SENSE Pin Voltage ... – 0.3V to 36V MS PART MARKING NUMBER Operating Temperature Range (Note 2) .. – 40°C to 85°C LTC3704EMS LTYT LTC3704E .. –40°C to 85°C LTC3704IMS LTCFW LTC3704I ... –40°C to 125°C
Order Options
Tape and Reel: Add #TR Junction Temperature (Note 3) .. 125°C Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Storage Temperature Range ... – 65°C to 150°C Lead Free Part Marking: http://www.linear.com/leadfree/ Lead Temperature (Soldering, 10 sec).. 300°C Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
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denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = VINTVCC = 5V, VRUN = 1.5V, RT = 80k, VMODE/SYNC = 0V, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loop
VIN(MIN) Minimum Input Voltage 2.5 V IQ Input Voltage Supply Current (VINTVCC = Open, No Switching) (Note 4) Continuous Mode VMODE/SYNC = 5V, VITH = 0.75V 550 1000 μA Burst Mode Operation, No Load VMODE/SYNC = 0V, VITH = 0V (Note 5) 250 500 μA Shutdown Mode VRUN = 0V 10 20 μA V + RUN Rising RUN Input Threshold Voltage VINTVCC = Open 1.348 V V – RUN Falling RUN Input Threshold Voltage VINTVCC = Open 1.223 1.248 1.273 V ● 1.198 1.298 V VRUN(HYST) RUN Pin Input Threshold Hysteresis 50 100 150 mV IRUN RUN Input Current 1 100 nA VNFB Negative Feedback Voltage VITH = 0.4V (Note 5) –1.218 –1.230 –1.242 V VITH = 0.4V (Note 5) ● –1.212 –1.248 V VITH = 0.4V (I-Grade) (Notes 2 and 5) ● –1.205 –1.255 V INFB NFB Pin Input Current 7.5 15 μA ΔVNFB Line Regulation 2.5V ≤ VIN ≤ 30V 0.002 0.02 %/V ΔVIN ΔVNFB Load Regulation VMODE/SYNC = 0V, VITH = 0.5V to 0.90V (Note 5) ● – 1 – 0.1 % ΔVITH gm Error Amplifier Transconductance ITH Pin Load = ±5μA (Note 5) 650 μmho VITH(BURST) Burst Mode Operation ITH Pin Voltage Falling ITH Voltage 0.17 V VSENSE(MAX) Maximum Current Sense Input Threshold Duty Cycle < 20% 120 150 180 mV ISENSE(ON) SENSE Pin Current (GATE High) VSENSE = 0V 40 75 μA ISENSE(OFF) SENSE Pin Current (GATE Low) VSENSE = 30V 0.1 5 μA 3704fb 2