LM2672
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
ON/OFF Pin Voltage
Switch Voltage to Ground
Boost Pin Voltage
Feedback Pin Voltage
ESD Susceptibility
Human Body Model (Note 2)
Power Dissipation
45V
−0.1V
≤
V
SH
≤
6V
−1V
V
SW
+ 8V
Storage Temperature Range
Lead Temperature
M Package
Vapor Phase (60s)
Infrared (15s)
N Package (Soldering, 10s)
LLP Package (see AN-1187)
Maximum Junction Temperature
−65°C to +150°C
+215°C
+220°C
+260°C
+150°C
−0.3V
≤
V
FB
≤
14V
Operating Ratings
Supply Voltage
Temperature Range
6.5V to 40V
−40°C
≤
T
J
≤
+125°C
2 kV
Internally Limited
Electrical Characteristics
LM2672-3.3
Specifications with standard type face are for T
J
= 25°C, and those in
bold type face
apply over
full
Operating Temperature Range.
Symbol
Parameter
Conditions
Typical
(Note 4)
3.3
3.3
86
Min
(Note 5)
3.251/3.201
3.251/3.201
Max
(Note 5)
3.350/3.399
3.350/3.399
Units
SYSTEM PARAMETERS
Test Circuit
(Note 3)
V
OUT
V
OUT
η
Output Voltage
Output Voltage
Efficiency
V
IN
= 8V to 40V, I
LOAD
= 20 mA to 1A
V
IN
= 6.5V to 40V, I
LOAD
= 20 mA to 500 mA
V
IN
= 12V, I
LOAD
= 1A
V
V
%
LM2672-5.0
Symbol
Parameter
Conditions
Typical
(Note 4)
5.0
5.0
90
Min
(Note 5)
4.925/4.850
4.925/4.850
Max
(Note 5)
5.075/5.150
5.075/5.150
Units
SYSTEM PARAMETERS
Test Circuit
(Note 3)
V
OUT
V
OUT
η
Output Voltage
Output Voltage
Efficiency
V
IN
= 8V to 40V, I
LOAD
= 20 mA to 1A
V
IN
= 6.5V to 40V, I
LOAD
= 20 mA to 500 mA
V
IN
= 12V, I
LOAD
= 1A
V
V
%
LM2672-12
Symbol
Parameter
Conditions
Typical
(Note 4)
12
94
Min
(Note 5)
11.82/11.64
Max
(Note 5)
12.18/12.36
Units
SYSTEM PARAMETERS
Test Circuit
(Note 3)
V
OUT
η
Output Voltage
Efficiency
V
IN
= 15V to 40V, I
LOAD
= 20 mA to 1A
V
IN
= 24V, I
LOAD
= 1A
V
%
LM2672-ADJ
Symbol
Parameter
Conditions
Typ
(Note 4)
1.210
Min
(Note 5)
1.192/1.174
Max
(Note 5)
1.228/1.246
Units
SYSTEM PARAMETERS
Test Circuit
(Note 3)
V
FB
Feedback Voltage V
IN
= 8V to 40V, I
LOAD
= 20 mA to 1A
V
OUT
Programmed for 5V
(see Circuit of
V
FB
Feedback Voltage V
IN
= 6.5V to 40V, I
LOAD
= 20 mA to 500 mA
V
OUT
Programmed for 5V
(see Circuit of
η
Efficiency
V
IN
= 12V, I
LOAD
= 1A
90
%
1.210
1.192/1.174
1.228/1.246
V
V
3
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