LT1172CSW Linear Technology, LT1172CSW Datasheet - Page 2

• Manufacturer Part Number: LT1172CSW
• Description: IC SWTCHNG REG HI-EFF 16-SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Inverting, Cuk, Flyback, Forward Converterr

Specifications of LT1172CSW

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 40 V
• Current - Output: 1.25A
• Frequency - Switching: 100kHz
• Voltage - Input: 3 ~ 40 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Power - Output: 100W
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
LT1170/LT1171/LT1172
Supply Voltage
Switch Output Voltage
Feedback Pin Voltage (Transient, 1ms) ................... ±15V
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec .................... 300°C
2
* Do not connect Pin 4 of the LT1172 DIP or SO to external
* θ will vary from approximately 25°C/W with 2.8 sq.
circuitry. This pin may be active in future revisions.
LT1170/LT1171/LT1172HV (Note 2) .......................60V
LT1170/LT1171/LT1172 (Note 2) ............................40V
LT1170/LT1171/LT1172HV .....................................75V
LT1170/LT1171/LT1172 .........................................65V
LT1172S8 ..............................................................60V
in. of 1oz. copper to 45°C/W with 0.20 sq. in. of 1oz.
copper. Somewhat lower values can be obtained with
additional copper layers in multilayer boards.
GND
NC*
V
FB
C
T
JMAX
T
1
2
3
4
JMAX
FRONT VIEW
Q PACKAGE
5-LEAD DD
8-LEAD CERDIP
= 125°C, θ
J8 PACKAGE
= 100°C, θ
TOP VIEW
5
4
3
2
1
JA
JA
= 100°C/W
= *°C/W
8
7
6
5
V
V
GND
FB
V
IN
SW
C
E2
V
E1
V
SW
IN
LT1170MK: T
LT1171MK: T
LT1172MK: T
LT1170CK: T
LT1171CK: T
LT1172CK: T
T
T
JMAX
JMAX
GND
NC
NC
NC
NC
NC
V
FB
C
= 125°C for intermittent fault conditions.
= 125°C for intermittent fault conditions.
V
Based on continuous operation.
Based on continuous operation.
V
T
16-LEAD PLASTIC SO WIDE
SW
JMAX
JMAX
JMAX
1
2
3
4
5
6
7
8
JMAX
JMAX
JMAX
IN
JMAX
4-LEAD TO-3 METAL CAN
OBSOLETE
= 100°C, θ
= 100°C, θ
= 100°C, θ
= 150°C, θ
= 150°C, θ
= 150°C, θ
= 100°C, θ
BOTTOM VIEW
SW PACKAGE
TOP VIEW
K PACKAGE
1
4
(Note 1)
JC
JC
JC
JC
JC
JC
JA
= 2°C/W, θ
= 4°C/W, θ
= 8°C/W, θ
= 2°C/W, θ
= 4°C/W, θ
= 8°C/W, θ
= 150°C/W
2
3
Operating Junction Temperature Range
16
15
14
13
12
11
10
9
LT1170M/LT1171M (OBSOLETE) ....... –55°C to 150°C
LT1172M ............................................ –55°C to 125°C
LT1170/LT1171/LT1172HVC,
LT1170/LT1171/LT1172C (Oper.) ............. 0°C to 100°C
LT1170/LT1171/LT1172HVC
LT1170/LT1171/LT1172C (Sh. Ckt.) ........ 0°C to 125°C
LT1170/LT1171/LT1172HVI,
LT1170/LT1171/LT1172I (Oper.) .......... –40°C to 100°C
LT1170/LT1171/LT1172HVI,
LT1170/LT1171/LT1172I (Sh. Ckt.) ...... –40°C to 125°C
JA
JA
JA
JA
JA
JA
NC
NC
E2
V
E1
V
NC
NC
V
FB
SW
IN
C
= 35°C/W
= 35°C/W
= 35°C/W
= 35°C/W
= 35°C/W
= 35°C/W
CASE
IS GND
LT1170CT/LT1170HVCT: T
LT1171CT/LT1171HVCT: T
LT1172CT/LT1172HVCT: T
* Do not connect Pin 4 of the LT1172 DIP or SO to external
circuitry. This pin may be active in future revisions.
T
JMAX
T
GND
N8 PACKAGE
8-LEAD PDIP
NC*
JMAX
V
FB
C
T
= 125°C for intermittent fault conditions.
JMAX
5-LEAD PLASTIC TO-220
Based on continuous operation.
depending on board layout (S)
= 100°C, θ
1
2
3
4
= 100°C, θ
FRONT VIEW
T PACKAGE
JMAX
JMAX
JMAX
TOP VIEW
JA
=100°C, θ
=100°C, θ
=100°C, θ
5
4
3
2
1
= 120°C/W to 150°C/W
8-LEAD PLASTIC SO
JA
= 100°C/W (N)
S8 PACKAGE
JC
JC
JC
8
7
6
5
= 2°C/W, θ
= 4°C/W, θ
= 8°C/W, θ
E2
V
E1
V
SW
IN
JA
JA
JA
= 75°C/W
= 75°C/W
= 75°C/W
V
V
GND
FB
V
IN
SW
C
117012fg