LT1172MJ8 Linear Technology, LT1172MJ8 Datasheet - Page 3

• Manufacturer Part Number: LT1172MJ8
• Description: SP-SWREG/Monolithic, 100kHz 5A 2.5A And 1.25A High Efficiency Switching Regulato
• Manufacturer: Linear Technology

PACKAGE/ORDER I FOR ATIO
perature range, otherwise specifications are at T
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
V
I
g
A
I
V
B
Q
m
* Do not connect Pin 4 of the LT1172 DIP or SO to external
REF
V
FB
circuitry. This pin may be active in future revisions.
Reference Voltage
Feedback Input Current
Error Amplifier
Transconductance
Error Amplifier Source or
Sink Current
Error Amplifier Clamp
Voltage
Reference Voltage Line
Regulation
Error Amplifier Voltage Gain
Minimum Input Voltage (Note 5)
Supply Current
Control Pin Threshold
Normal/Flyback Threshold
on Feedback Pin
Flyback Reference Voltage
(Note 5)
Change in Flyback Reference
Voltage
Flyback Reference Voltage
Line Regulation (Note 5)
Flyback Amplifier
Transconductance (g
GND
T
NC*
JMAX
V
FB
C
1
2
3
4
= 150 C,
8-LEAD CERDIP
J8 PACKAGE
TOP VIEW
JA
= 100 C/W
8
7
6
5
m
)
E2
V
E1
V
SW
IN
U
CONDITIONS
Measured at Feedback Pin
V
V
V
Hi Clamp, V
Lo Clamp, V
3V V
V
0.9V V
3V V
Duty Cycle = 0
I
0.05 I
I
7V V
FB
FB
C
FB
C
C
I
I
C
C
= 0.8V
= 1.5V
= 0.8V
= 50 A
= 50 A
W
= 25 A
= 10 A
= V
ORDER PART
LT1172MJ8
LT1172CJ8
A
IN
IN
IN
REF
FB
NUMBER
= 25 C. V
C
OBSOLETE PACKAGES
V
V
V
FB
FB
1.4V
1mA
MAX
MAX
MAX
= 1V
= 1.5V
, V
The
IN
U
C
= 0.6V
= 15V, V
denotes the specifications which apply over the full operating tem-
LT1170MK
LT1170CK
LT1171MK
LT1171CK
LT1172MK
LT1172CK
Based on continuous operation.
T
C
JMAX
= 0.5V, V
= 125 C for intermittent fault conditions.
V
V
SW
IN
4-LEAD TO-3 METAL CAN
FB
= V
BOTTOM VIEW
K PACKAGE
1
4
REF
150 C
100 C
150 C
100 C
150 C
150 C
T
, output pin open, unless otherwise noted.
JMAX
2
3
LT1 170/LT1 171/LT1172
2 C/W
2 C/W
4 C/W
4 C/W
8 C/W
8 C/W
V
FB
C
JC
CASE
IS GND
35 C/W
35 C/W
35 C/W
35 C/W
35 C/W
35 C/W
1.224
1.214
3000
2400
1.80
0.25
15.0
14.0
MIN
150
120
500
150
0.8
0.6
0.4
4.5
JA
1.244
1.244
4400
0.38
0.45
16.3
0.01
TYP
350
200
800
300
2.6
0.9
6.8
6
ORDER PART
LT1170MK
LT1170CK
LT1171MK
LT1171CK
LT1172MK
LT1172CK
NUMBER
1.264
1.274
MAX
1100
6000
7000
2.30
0.52
0.03
1.08
1.25
0.54
17.6
18.0
0.03
750
350
400
650
3.0
9
9
117012ff
UNITS
3
mho
mho
mho
%/V
%/V
V/V
mA
nA
nA
V
V
A
A
V
V
V
V
V
V
V
V
V