LT3463/LT3463A
W W
U W
U
W
U
ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
TOP VIEW
VIN, SHDN1, SHDN2 Voltage ................................... 15V
SW1, SW2, VOUT1 Voltage ....................................... 42V
D2 Voltage ............................................................. –42V
FB1, FB2 Voltage Range .............................. –0.3V to 2V
Junction Temperature........................................... 125°C
Operating Ambient Temperature Range
ORDER PART
NUMBER
V
1
2
3
4
5
10 FB1
OUT1
SW1
9
8
7
6
SHDN1
11
LT3463EDD
LT3463AEDD
V
SHDN2
IN
SW2
D2
V
REF
FB2
DD PART MARKING
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W, θJC = 3°C/W
(Note 2) .............................................. –40°C to 85°C
Storage Temperature Range ................. –65°C to 125°C
LAFC
LBJK
EXPOSED PAD (PIN 11) IS GND
AND MUST BE SOLDERED TO PCB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The ● denotes the specifications which apply over the full operating
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at TA = 25°C. VIN = 2.5V, VSHDN = 2.5V unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
2.2
40
MAX
2.4
UNITS
V
Minimum Input Voltage
Total Quiescent Current
Shutdown Current
For Both Switchers, Not Switching
60
µA
V
= V
= 0V
SHDN2
0.1
1.25
0.05
1.25
8
1
µA
SHDN1
V
REF
V
REF
Pin Voltage
With 124kΩ to GND
With 124kΩ to GND
High to Low Transition
●
●
1.23
1.27
0.10
1.275
V
Pin Voltage Line Regulation
%/V
V
FB1 Comparator Trip Voltage
FB1 Comparator Hysteresis
FB1 Line Regulation
1.225
mV
%/V
nA
2.5V < V < 15V
0.05
20
0.10
50
IN
FB1 Pin Bias Current (Note 3)
FB2 Comparator Trip Voltage
FB2 Comparator Hysteresis
V
FB1
= 1.3V
●
●
Low to High Transition
0
3
12
mV
mV
%/V
nA
8
FB2 Line Regulation (V – V
)
2.5V < V < 15V
0.05
20
0.10
50
REF
FB2
IN
FB2 Pin Bias Current (Note 4)
SW1 Switch Off Time
V
FB2
= –0.1V
●
V
OUT1
V
OUT1
– V = 4V
300
1.5
ns
µs
IN
– V = 0V
IN
SW2 Switch Off Time
V
FB2
V
FB2
< 0.1V
= 1V
300
1.5
ns
µs
Switch V
(SW1, SW2)
I
= 150mA
SW
180
250
mV
mA
CESAT
Switch Current Limit (SW1)
Switch Current Limit (SW2)
180
320
LT3463
LT3463A
180
320
250
400
320
460
mA
mA
Swith Leakage Current (SW1, SW2)
Schottky Forward Voltage (V , D2)
Switch Off, V = 42V
0.01
750
1
µA
SW
I = 150mA
D
mV
OUT1
Schottky Reverse Leakage Current
V
V
– V = 42V
1
1
5
5
µA
µA
OUT1
D2
SW
= –42V
SHDN1 Pin Current
V
V
= 2.5V
= 2.5V
4
4
1
10
10
µA
µA
V
SHDN1
SHDN2
SHDN2 Pin Current
SHDN1/SHDN2 Start-Up Threshold
0.3
1.5
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
operating ambient temperature range are assured by design,
characterization and correlation with statistical process controls.
Note 2: The LT3463/LT3463A are guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
Note 3: Bias current flows into the FB1 pin.
Note 4: Bias current flows out of the FB2 pin.
3463f
2
Linear Systems [ Linear Systems ]
