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