Datasheet LT3463, LT3463A (Analog Devices) - 2

LT3463/LT3463A
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
V TOP VIEW IN, SHDN1, SHDN2 Voltage ... 15V ORDER PART SW1, SW2, VOUT1 Voltage ... 42V V 1 10 FB1 NUMBER OUT1 D2 Voltage ... –42V SW1 2 9 SHDN1 FB1, FB2 Voltage Range .. –0.3V to 2V 11 LT3463EDD V 3 8 SHDN2 IN Junction Temperature ... 125°C SW2 4 7 VREF LT3463AEDD D2 5 6 FB2 Operating Ambient Temperature Range DD PART MARKING (Note 2) .. – 40°C to 85°C DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN Storage Temperature Range ... – 65°C to 125°C LAFC TJMAX = 125°C, θJA = 43°C/W, θJC = 3°C/W EXPOSED PAD (PIN 11) IS GND LBJK AND 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 = 2.5V, VSHDN = 2.5V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage 2.2 2.4 V Total Quiescent Current For Both Switchers, Not Switching 40 60 µA Shutdown Current VSHDN1 = VSHDN2 = 0V 0.1 1 µA VREF Pin Voltage With 124kΩ to GND ● 1.23 1.25 1.27 V VREF Pin Voltage Line Regulation With 124kΩ to GND 0.05 0.10 %/V FB1 Comparator Trip Voltage High to Low Transition ● 1.225 1.25 1.275 V FB1 Comparator Hysteresis 8 mV FB1 Line Regulation 2.5V < VIN < 15V 0.05 0.10 %/V FB1 Pin Bias Current (Note 3) VFB1 = 1.3V ● 20 50 nA FB2 Comparator Trip Voltage Low to High Transition ● 0 3 12 mV FB2 Comparator Hysteresis 8 mV FB2 Line Regulation (VREF – VFB2) 2.5V < VIN < 15V 0.05 0.10 %/V FB2 Pin Bias Current (Note 4) VFB2 = –0.1V ● 20 50 nA SW1 Switch Off Time VOUT1 – VIN = 4V 300 ns VOUT1 – VIN = 0V 1.5 µs SW2 Switch Off Time VFB2 < 0.1V 300 ns VFB2 = 1V 1.5 µs Switch VCESAT (SW1, SW2) ISW = 150mA 180 mV Switch Current Limit (SW1) 180 250 320 mA Switch Current Limit (SW2) LT3463 180 250 320 mA LT3463A 320 400 460 mA Swith Leakage Current (SW1, SW2) Switch Off, VSW = 42V 0.01 1 µA Schottky Forward Voltage (VOUT1, D2) ID = 150mA 750 mV Schottky Reverse Leakage Current VOUT1 – VSW = 42V 1 5 µA VD2 = –42V 1 5 µA SHDN1 Pin Current VSHDN1 = 2.5V 4 10 µA SHDN2 Pin Current VSHDN2 = 2.5V 4 10 µA SHDN1/SHDN2 Start-Up Threshold 0.3 1 1.5 V
Note 1:
Absolute Maximum Ratings are those values beyond which the life operating ambient temperature range are assured by design, of a device may be impaired. characterization and correlation with statistical process controls.
Note 2:
The LT3463/LT3463A are guaranteed to meet performance
Note 3:
Bias current flows into the FB1 pin. specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
Note 4:
Bias current flows out of the FB2 pin. 3463f 2