LT3462/LT3462A
3462af
2
Input Voltage (V
IN
) .................................................. 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
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 3V, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage 2.5 V
Maximum Operating Voltage 16 V
SDREF Voltage 10µA > I
SDREF
≥ –80µA ● 1.245 1.265 1.285 V
FB Pin Bias Current (Note 2) 15 50 nA
SDREF Minus FB Voltage 10µA > I
SDREF
≥ –80µA ● 1.235 1.263 1.285 V
Error Amp Offset Voltage –12 12 mV
SDREF Reference Source Current SDREF >1.2V ● 120 180 µA
Supply Current FB = –0.05V, Not Switching 2.9 3.6 mA
SDREF = 0V, FB = Open, V
IN
= 5V 6.5 10 µA
SDREF Line Regulation 0.007 %/V
Switching Frequency (LT3462) ● 0.8 1.2 1.6 MHz
Switching Frequency (LT3462A) ● 2.0 2.7 3.5 MHz
Maximum Duty Cycle (LT3462) ● 90 %
Maximum Duty Cycle (LT3462A) ● 77 %
Switch Current Limit 300 420 mA
Switch V
CESAT
I
SW
= 250mA 270 350 mV
Switch Leakage Current V
SW
= 5V 0.01 1 µA
Rectifier Leakage Current V
D
= –40V 0.03 4 µA
Rectifier Forward Drop I
SCHOTTKY
= 250mA 800 1100 mV
SDREF Voltage Low ● 0.20 V
SDREF Off-State Pull-Up Current 123 µA
SDREF Turn-Off Current –300 –200 µA
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
S6 PART MARKING
LTBBV
LTBGB
LT3462ES6
LT3462AES6
T
JMAX
= 125°C
θ
JA
= 150°C ON BOARD OVER
GROUND PLANE
θ
JC
= 120°C/W
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.
6 V
IN
5 D
4 SDREF
SW 1
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
GND 2
FB 3
