LT1507
ABSOLUTE
MAXIMUM
RATINGS
Input Voltage ........................................................... 16V
Boost Pin Voltage .................................................... 25V
Shutdown Pin Voltage ............................................... 7V
FB Pin Voltage (Adjustable Part) ............................. 3.5V
FB Pin Current (Adjustable Part) ............................. 1mA
Sense Voltage (Fixed 3.3V Part) ................................ 5V
Sync Pin Voltage ....................................................... 7V
Operating Ambient Temperature Range
LT1507C .................................................. 0°C to 70°C
LT1507I .............................................. – 40°C to 85°C
Max Operating Junction Temperature................... 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
ORDER PART
NUMBER
TOP VIEW
BOOST 1
V
IN
2
V
SW
3
SHDN 4
N8 PACKAGE
8-LEAD PDIP
8
7
6
5
V
C
FB/SENSE
GND
SYNC
S8 PACKAGE
8-LEAD PLASTIC SO
LT1507CN8
LT1507CN8-3.3
LT1507CS8
LT1507CS8-3.3
LT1507IN8
LT1507IN8-3.3
LT1507IS8
LT1507IS8-3.3
S8 PART MARKING
1507
15073
1507I
1507I3
T
JMAX
= 125°C,
θ
JA
= 80°C/W TO 120°C/ W (N)
T
JMAX
= 125°C,
θ
JA
= 120°C/W TO 170°C/ W (S)
DEPENDING ON PC BOARD LAYOUT
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
T
J
= 25°C, V
IN
= 5V, V
C
= 1.5V, boost open, switch open unless otherwise specified.
PARAMETER
Reference Voltage (Adjustable)
Sense Voltage (3.3V)
All Conditions
Sense Pin Resistance
Reference Voltage Line Regulation
FB Input Bias Current
Error Amplifier Voltage Gain (Note 8)
Error Amplifier Transconductance (Note 8)
V
C
Pin to Switch Current
Transconductance
Error Amplifier Source Current
Error Amplifier Sink Current
V
C
Pin Switching Threshold
V
C
Pin High Clamp
Switch Current Limit
Switch On Resistance (Note 6)
Maximum Switch Duty Cycle
4.3V
≤
V
IN
≤
15V
(Note 1)
∆I(V
C
) =
±10µA
q
q
q
q
q
CONDITIONS
All Conditions
q
MIN
2.39
2.36
3.25
3.23
4.0
TYP
2.42
3.3
6.6
0.01
0.5
400
2000
MAX
2.45
2.48
3.35
3.37
9.5
0.03
2
2700
3000
UNITS
V
V
V
V
kΩ
%/V
µA
µmho
µmho
A/V
µA
mA
V
V
A
A
Ω
Ω
%
%
150
1500
1100
V
FB
= 2.1V or V
SENSE
= 2.9V
V
FB
= 2.7V or V
SENSE
= 3.7V
Duty Cycle = 0
V
FB
= 2.1V or V
SENSE
= 2.9V
V
C
Open, V
FB
= 2.1V or V
SENSE
= 2.9V
V
IN
≥
5V, V
BOOST
= V
IN
+ 5V
I
SW
= 1.5A, V
BOOST
= V
IN
+ 5V
V
FB
= 2.1V or V
SENSE
= 2.9V
q
150
DC
≤
50%
DC = 80%
q
q
q
q
1.50
1.35
2
225
2
0.9
2.1
2
0.3
320
3
3
0.4
0.5
90
86
93
93
2
U
W
U
U
W W
W
LINER [ LINEAR TECHNOLOGY ]
