LT1507 Linear Technology, LT1507 Datasheet - Page 2

• Manufacturer Part Number: LT1507
• Description: 500kHz Monolithic Buck Mode Switching Regulator
• Manufacturer: Linear Technology

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