Datasheet LT3573 (Analog Devices) - 2

LT3573
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
SW ..60V TOP VIEW VIN, SHDN/UVLO, RFB, BIAS ...40V GND 1 16 GND TEST 2 15 TC SS, VC, TC, RREF, RILIM ...5V GND 3 14 RREF Maximum Junction Temperature .. 125°C SW 4 13 RFB V 5 17 12 IN VC Operating Junction Temperature Range (Note 2) BIAS 6 11 RILIM SHDN/UVLO 7 10 SS LT3573E .. –40°C to 125°C GND 8 9 GND Storage Temperature Range ..–65°C to 150°C MSE PACKAGE 16-LEAD PLASTIC MSOP θJA = 50°C/W, θJC = 10°C/W EXPOSED PAD (PIN 17) IS GND, MUST BE CONNECTED TO GND
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3573EMSE#PBF LT3573EMSE#TRPBF 3573 16-Lead Plastic MSOP –40°C to 125°C LT3573IMSE#PBF LT3573IMSE#TRPBF 3573 16-Lead Plastic MSOP –40°C to 125°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage Range l 3 40 V Quiescent Current SS = 0V 3.5 mA VSHDN/UVLO = 0V 0 1 µA Soft-Start Current SS = 0.4V 7 µA SHDN/UVLO Pin Threshold UVLO Pin Voltage Rising l 1.15 1.22 1.29 V SHDN/UVLO Pin Hysteresis Current VUVLO = 1V 2 2.5 3 µA Soft-Start Threshold 0.7 V Maximum Switching Frequency 1000 kHz Switch Current Limit RILIM = 10k 1.25 1.55 1.85 A Minimum Current Limit VC = 0V 200 mA Switch VCESAT ISW = 0.5A 150 250 mV RREF Voltage VIN = 3V 1.21 1.23 1.25 V l 1.20 1.25 RREF Voltage Line Regulation 3V < VIN < 40V 0.01 0.03 %/ V RREF Pin Bias Current (Note 3) l 100 600 nA IREF Reference Current Measured at RFB Pin with RREF = 6.49k 190 µA 3573fd 2 For more information www.linear.com/LT3573 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts