Datasheet LT3494, LT3494A (Analog Devices) - 2

LT3494/LT3494A
ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION (Note 1)
TOP VIEW VCC Voltage ...16V SW Voltage ...40V SW 1 8 CAP CAP Voltage ..40V GND 2 7 VOUT 9 V VCC 3 6 FB OUT Voltage ...40V SHDN Voltage ...16V CTRL 4 5 SHDN CTRL Voltage ..16V DDB PACKAGE FB Voltage ..2.5V 8-LEAD (3mm × 2mm) PLASTIC DFN Maximum Junction Temperature .. 125°C TJMAX = 125°C, θJA = 76°C/W EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB Operating Temperature Range (Note 2) ... –40°C to 85°C Storage Temperature Range ... –65°C to 125°C ORDER PART NUMBER DDB PART MARKING LT3494EDDB LCCD LT3494AEDDB LCRW
Order Options
Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
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denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VCC = 3V, VSHDN = VCC, unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage 2.3 2.5 V Maximum Operating Voltage 16 V Feedback Voltage VCTRL = 3V (Note 3) ● 1.205 1.225 1.245 V FB Resistor ● 179 182 184 kΩ Quiescent Current Not Switching 65 75 μA Quiescent Current in Shutdown V⎯S⎯H⎯D⎯N = 0V, VCC = 3V 0 1 μA Minimum Switch Off Time After Start-Up Mode, VFB = 1V, VCTRL = 3V (Note 4) 100 ns During Start-Up Mode, VFB = 0.2V, VCTRL = 3V (Note 4) 450 ns Maximum Switch Off Time VFB = 1.5V ● 15 20 30 μs Switch Current Limit LT3494A (Note 5) 225 350 450 mA LT3494 (Note 5) 115 180 250 mA Switch VCESAT LT3494A, ISW = 200mA 180 mV LT3494, ISW = 100mA 110 mV Switch Leakage Current VSW = 5V, V⎯S⎯H⎯D⎯N = 0 0.01 1 μA Schottky Forward Voltage IDIODE = 100mA 900 1100 mV Schottky Reverse Leakage 0.05 1 μA PMOS Disconnect VCAP – VOUT IOUT = 10mA, VCAP = 5V 250 mV SHDN Input Voltage High 1.5 V SHDN Input Voltage Low 0.3 V SHDN Pin Bias Current VSHDN = 3V 5 10 μA VSHDN = 0V 0 0.1 μA 3494fb 2