Datasheet LT3472 (Analog Devices) - 2

LT3472
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
TOP VIEW ORDER PART VIN, SHDN Voltage ... 16V NUMBER SWP, SWN, VPOS Voltage ... 36V SWP 1 10 VPOS DN Voltage .. –36V V 2 9 SSP IN LT3472EDD SHDN 3 11 8 FBP FBP, FBN, SSP, SSN Voltage ... 10V SWN 4 7 SSN Maximum Junction Temperature .. 125°C DN 5 6 FBN Operating Temperature Range DFN PART Extended Commercial ... –40 DD PACKAGE °C to 85°C MARKING 10-LEAD (3mm × 3mm) PLASTIC DFN Storage Temperature Range ... – 65°C to 125°C TJMAX = 125°C, θJA = 43°C/W, θJC = 3°C/W EXPOSED PAD IS GND (PIN 11) LBGC MUST BE SOLDERED TO PCB Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VIN = 3V, SHDN = 3V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operation Voltage 2.2 V Maximum Operation Voltage 16 V Supply Current SHDN = 3V, Not Switching 2.8 mA SHDN = 0V 0.1 1 µA SHDN Voltage High ● 0.8 V SHDN Voltage Low ● 0.3 V SHDN Pin Bias Current SHDN = 3V 35 µA Positive Feedback Voltage ● 1.2 1.25 1.3 V Negative Feedback Voltage ● –5 0 5 mV Positive Feedback Voltage Line Regulation 0.01 %/V Negative Feedback Voltage Line Regulation 0.008 mV/V FBP Current FBP = VFBP ● 24.5 25 25.3 µA FBN Current FBN = VFBN ● 24.5 25 25.3 µA FBP to Start Negative Channel 1.02 1.1 1.18 V Switching Frequency 0.9 1.1 1.4 MHz Maximum Duty Cycle (Both Channels) ● 88 92 % Positive Channel Switch Current Limit ● 250 350 mA Negative Channel Switch Current Limit ● 300 400 mA Positive Channel Switch VCESAT ISWP = 200mA 245 mV Negative Channel Switch VCESAT ISWN = 200mA 400 mV Switch Leakage Current (Both Channels) VSW = 5V 0.01 5 µA Schottky DP Forward Drop IDP = 150mA 700 950 mV Schottky DN Forward Drop IDN = 150mA 750 1000 mV Schottky Leakage Current (Both Channels) VR = 36V 4 µA
Note 1:
Absolute Maximum Ratings are those values beyond which the life 0°C to 70°C. Specifications over the –40°C to 85°C operating range are of a device may be impaired. assured by design, characterization and correlation with statistical process
Note 2:
The LT3472E is guaranteed to meet specified performance from controls. 3472f 2