LT3462 Ver la hoja de datos (PDF) - Linear Technology
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LT3462 Datasheet PDF : 8 Pages
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LT3462/LT3462A
ABSOLUTE AXI U RATI GS
(Note 1)
Input Voltage (VIN) .................................................. 16V
SW Voltage .............................................................. 40V
D Voltage ............................................................... –40V
SDREF, FB Voltage ................................................. 2.5V
Operating Ambient
Temperature Range (Note 3) ...............–40°C to 85°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10sec)................... 300°C
UW U
PACKAGE/ORDER I FOR ATIO
SW 1
GND 2
FB 3
TOP VIEW
6 VIN
5D
4 SDREF
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
TJMAX = 125°C
θJA = 150°C ON BOARD OVER
GROUND PLANE
θJC = 120°C/W
ORDER PART
NUMBER
LT3462ES6
LT3462AES6
S6 PART MARKING
LTBBV
LTBGB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C, VIN = 3V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Operating Voltage
2.5
V
Maximum Operating Voltage
16
V
SDREF Voltage
FB Pin Bias Current (Note 2)
10µA > ISDREF ≥ –80µA
q 1.245 1.265 1.285
V
15
50
nA
SDREF Minus FB Voltage
Error Amp Offset Voltage
10µA > ISDREF ≥ –80µA
q 1.235 1.263 1.285
V
–12
12
mV
SDREF Reference Source Current
Supply Current
SDREF Line Regulation
SDREF >1.2V
FB = –0.05V, Not Switching
SDREF = 0V, FB = Open, VIN = 5V
q 120
180
µA
2.9
3.6
mA
6.5
10
µA
0.007
%/V
Switching Frequency (LT3462)
q 0.8
1.2
1.6
MHz
Switching Frequency (LT3462A)
q 2.0
2.7
3.5
MHz
Maximum Duty Cycle (LT3462)
q 90
%
Maximum Duty Cycle (LT3462A)
q 77
%
Switch Current Limit
300 420
mA
Switch VCESAT
Switch Leakage Current
Rectifier Leakage Current
Rectifier Forward Drop
SDREF Voltage Low
ISW = 250mA
VSW = 5V
VD = –40V
ISCHOTTKY = 250mA
270
350
mV
0.01
1
µA
0.03
4
µA
800 1100
mV
q
0.20
V
SDREF Off-State Pull-Up Current
SDREF Turn-Off Current
1
2
3
µA
–300 –200
µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Current flows out of the pin.
Note 3: The LT3462E is guaranteed to meet specifications from 0°C to
70°C. Specifications over the –40°C to 85°C operating temperature range
are assured by design, characterization and correlation with statistical
process controls.
3462af
2
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