LM2674
Absolute Maximum Ratings
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
2 kV
Internally Limited
45V
−0.1V
≤
V
SH
≤
6V
−1V
V
SW
+ 8V
−0.3V
≤
V
FB
≤
14V
Storage Temperature Range
Lead Temperature
M Package
Vapor Phase (60s)
Infrared (15s)
N Package (Soldering, 10s)
LLP Package (See AN-1187)
Maximum Junction Temperature
+150˚C
+215˚C
+220˚C
+260˚C
−65˚C to +150˚C
Operating Ratings
Supply Voltage
6.5V to 40V
Junction Temperature Range
−40˚C
≤
T
J
≤
+125˚C
Electrical Characteristics
LM2674-3.3
Specifications with standard type face are for T
J
= 25˚C, and those with
bold type face
apply over
full
Operating Temperature Range.
Symbol
Parameter
Conditions
Typical
SYSTEM PARAMETERS
Test Circuit
V
OUT
V
OUT
η
Output Voltage
Output Voltage
Efficiency
V
IN
= 8V to 40V, I
LOAD
= 20 mA to 500 mA
V
IN
= 6.5V to 40V, I
LOAD
= 20 mA to 250 mA
V
IN
= 12V, I
LOAD
= 500 mA
3.3
3.3
86
3.251/3.201
3.251/3.201
3.350/3.399
3.350/3.399
V
V
%
Min
Max
Units
LM2674-5.0
Symbol
Parameter
Conditions
Typical
SYSTEM PARAMETERS
Test Circuit
V
OUT
V
OUT
η
Output Voltage
Output Voltage
Efficiency
V
IN
= 8V to 40V, I
LOAD
= 20 mA to 500 mA
V
IN
= 6.5V to 40V, I
LOAD
= 20 mA to 250 mA
V
IN
= 12V, I
LOAD
= 500 mA
5.0
5.0
90
4.925/4.850
4.925/4.850
5.075/5.150
5.075/5.150
V
V
%
Min
Max
Units
LM2674-12
Symbol
Parameter
Conditions
Typical
SYSTEM PARAMETERS
Test Circuit
V
OUT
η
Output Voltage
Efficiency
V
IN
= 15V to 40V, I
LOAD
= 20 mA to 500 mA
V
IN
= 24V, I
LOAD
= 500 mA
12
94
11.82/11.64
12.18/12.36
V
%
Min
Max
Units
LM2674-ADJ
Symbol
Parameter
Conditions
Typ
SYSTEM PARAMETERS
Test Circuit
V
FB
Feedback
Voltage
Feedback
Voltage
V
IN
= 8V to 40V, I
LOAD
= 20 mA to 500 mA
V
OUT
Programmed for 5V
(see Circuit of
V
IN
= 6.5V to 40V, I
LOAD
= 20 mA to 250 mA
V
OUT
Programmed for 5V
(see Circuit of
1.210
1.192/1.174
1.228/1.246
V
Min
Max
Units
V
FB
1.210
1.192/1.174
1.228/1.246
V
3
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