lm2679sx-3.3 National Semiconductor Corporation, lm2679sx-3.3 Datasheet - Page 3

• Manufacturer Part Number: lm2679sx-3.3
• Description: Simple Switcher 5a Step-down Voltage Regulator With Adjustable Current Limit
• Manufacturer: National Semiconductor Corporation

V
η
V
η
V
η
V
η
Symbol
Symbol
Symbol
Symbol
OUT
OUT
OUT
FB
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
of operation, −40°C to 125°C. Specifications appearing in normal type apply for T
LM2679-3.3
LM2679-5.0
LM2679-12
LM2679-ADJ
Input Supply Voltage
Softstart Pin Voltage
Switch Voltage to Ground
Boost Pin Voltage
Feedback Pin Voltage
Power Dissipation
Output Voltage
Efficiency
Output Voltage
Efficiency
Output Voltage
Efficiency
Feedback Voltage V
Efficiency
Parameter
Parameter
Parameter
Parameter
V
V
V
V
V
V
V
V
IN
IN
IN
IN
IN
IN
IN
OUT
IN
= 8V to 40V, 100mA
= 12V, I
= 8V to 40V, 100mA
= 12V, I
= 15V to 40V, 100mA
= 24V, I
= 8V to 40V, 100mA
= 12V, I
Programmed for 5V
LOAD
LOAD
LOAD
LOAD
Internally Limited
= 5A
= 5A
= 5A
= 5A
Limits appearing in bold type face apply over the entire junction temperature range
−0.3V to 14V
(Note 1)
−0.1V to 6V
Conditions
Conditions
Conditions
Conditions
−1V to V
V
SW
≤
≤
≤
≤
+ 8V
I
I
I
45V
OUT
OUT
OUT
I
OUT
IN
≤
≤
≤
≤
5A
5A
5A
5A
3
Operating Ratings
ESD (Note 2)
Storage Temperature Range
Soldering Temperature
Supply Voltage
Junction Temperature Range (T
Wave
Infrared
Vapor Phase
A
(Note 3)
(Note 3)
(Note 3)
(Note 3)
= T
Typical
Typical
Typical
1.21
Typ
3.3
5.0
82
84
12
92
84
J
= 25°C. R
3.234/3.201
4.900/4.850
11.76/11.64
1.186/1.174
(Note 4)
(Note 4)
(Note 4)
(Note 4)
ADJ
Min
Min
Min
Min
J
= 5.6KΩ
)
3.366/3.399
5.100/5.150
12.24/12.36
1.234/1.246
−65°C to 150°C
−40°C to 125°C
(Note 4)
(Note 4)
(Note 4)
(Note 4)
10 sec, 240°C
75 sec, 219°C
Max
Max
Max
Max
4 sec, 260°C
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8V to 40V
2 kV
Units
Units
Units
Units
%
%
%
%
V
V
V
V