Datasheet LT3493 (Analog Devices) - 2

制造商Analog Devices
描述1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN
页数 / 页20 / 2 — ABSOLUTE MAXIMUM RATINGS. PIN CONFIGURATION. (Note 1). ORDER INFORMATION. …
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ABSOLUTE MAXIMUM RATINGS. PIN CONFIGURATION. (Note 1). ORDER INFORMATION. LEAD FREE FINISH. TAPE AND REEL. PART MARKING

ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING

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LT3493
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
TOP VIEW Input Voltage (VIN) ..40V BOOST Pin Voltage ..50V FB 1 6 SHDN BOOST Pin Above SW Pin ...25V GND 2 7 5 VIN SHDN Pin ..40V BOOST 3 4 SW FB Voltage ...6V Operating Temperature Range (Note 2) DCB PACKAGE 6-LEAD (2mm s 3mm) PLASTIC DFN LT3493E .. –40°C to 85°C TJMAX = 125°C, θJA = 64°C/W LT3493I ... –40°C to 125°C EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB Maximum Junction Temperature .. 125°C Storage Temperature Range ... –65°C to 150°C
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3493EDCB#PBF LT3493EDCB#TRPBF LCGG 6-Lead (2mm × 3mm) Plastic DFN –40°C to 85°C LT3493IDCB#PBF LT3493IDCB#TRPBF LCGH 6-Lead (2mm × 3mm) Plastic DFN –40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3493EDCB LT3493EDCB#TR LCGG 6-Lead (2mm × 3mm) Plastic DFN –40°C to 85°C LT3493IDCB LT3493IDCB#TR LCGH 6-Lead (2mm × 3mm) Plastic DFN –40°C to 125°C Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 12V, VBOOST = 17V, unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Range 3.6 36 V Undervoltage Lockout 3.1 3.4 3.6 V Feedback Voltage l 765 780 795 mV FB Pin Bias Current VFB = Measured VREF + 10mV (Note 4) l 50 150 nA Quiescent Current Not Switching 1.9 2.5 mA Quiescent Current in Shutdown VSHDN = 0V 0.01 2 μA Reference Line Regulation VIN = 5V to 36V 0.007 %/V Switching Frequency VFB = 0.7V 685 750 815 kHz VFB = 0V 36 kHz Maximum Duty Cycle l 88 95 % TA = 25°C 91 95 % 3493fb 2