Datasheet
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 45V
ON/OFF Pin Voltage
−0.1V ≤ V
SH
≤ 6V
Switch Voltage to Ground −1V
Boost Pin Voltage V
SW
+ 8V
Feedback Pin Voltage
−0.3V ≤ V
FB
≤ 14V
ESD Susceptibility
Human Body Model (Note 2) 2 kV
Power Dissipation Internally Limited
Storage Temperature Range −65°C to +150°C
Lead Temperature
M Package
Vapor Phase (60s) +215°C
Infrared (15s) +220°C
N Package (Soldering, 10s) +260°C
LLP Package (See AN-1187)
Maximum Junction Temperature +150°C
Operating Ratings
Supply Voltage 6.5V to 40V
Temperature Range
−40°C ≤ T
J
≤ +125°C
Electrical Characteristics
LM2671-3.3 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 Min Max Units
(Note 4) (Note 5) (Note 5)
SYSTEM PARAMETERS Test Circuit Figure 2 (Note 3)
V
OUT
Output Voltage V
IN
= 8V to 40V, I
LOAD
= 20 mA to 500 mA 3.3 3.251/3.201 3.350/3.399 V
V
OUT
Output Voltage V
IN
= 6.5V to 40V, I
LOAD
= 20 mA to 250 mA 3.3 3.251/3.201 3.350/3.399 V
η
Efficiency V
IN
= 12V, I
LOAD
= 500 mA 86 %
LM2671-5.0
Symbol Parameter Conditions Typical Min Max Units
(Note 4) (Note 5) (Note 5)
SYSTEM PARAMETERS Test Circuit Figure 2 (Note 3)
V
OUT
Output Voltage V
IN
= 8V to 40V, I
LOAD
= 20 mA to 500 mA 5.0 4.925/4.850 5.075/5.150 V
V
OUT
Output Voltage V
IN
= 6.5V to 40V, I
LOAD
= 20 mA to 250 mA 5.0 4.925/4.850 5.075/5.150 V
η
Efficiency V
IN
= 12V, I
LOAD
= 500 mA 90 %
LM2671-12
Symbol Parameter Conditions Typical Min Max Units
(Note 4) (Note 5) (Note 5)
SYSTEM PARAMETERS Test Circuit Figure 2 (Note 3)
V
OUT
Output Voltage V
IN
= 15V to 40V, I
LOAD
= 20 mA to 500 mA 12 11.82/11.64 12.18/12.36 V
η
Efficiency V
IN
= 24V, I
LOAD
= 500 mA 94 %
LM2671-ADJ
Symbol Parameter Conditions Typ Min Max Units
(Note 4) (Note 5) (Note 5)
SYSTEM PARAMETERS Test Circuit Figure 3 (Note 3)
V
FB
Feedback Voltage V
IN
= 8V to 40V, I
LOAD
= 20 mA to 500 mA
1.210 1.192/1.174 1.228/1.246 V
V
OUT
Programmed for 5V
(see Circuit of Figure 3)
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LM2671