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LM2679 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM2679
Description  SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Supply Voltage
45V
Softstart Pin Voltage
−0.1V to 6V
Switch Voltage to Ground
−1V to V
IN
Boost Pin Voltage
V
SW +8V
Feedback Pin Voltage
−0.3V to 14V
Power Dissipation
Internally Limited
ESD (Note 2)
2 kV
Storage Temperature Range
−65˚C to 150˚C
Soldering Temperature
Wave
4 sec, 260˚C
Infrared
10 sec, 240˚C
Vapor Phase
75 sec, 219˚C
Operating Ratings
Supply Voltage
8V to 40V
Junction Temperature Range (T
J)
−40˚C to 125˚C
Electrical Characteristics Limits appearing in bold type face apply over the entire junction temperature
range of operation, −40˚C to 125˚C. Specifications appearing in normal type apply for T
A =TJ = 25˚C. RADJ = 5.6KΩ
LM2679-3.3
Symbol
Parameter
Conditions
Typical
Min
Max
Units
(Note 3)
(Note 4)
(Note 4)
V
OUT
Output Voltage
V
IN = 8V to 40V, 100mA ≤ IOUT ≤ 5A
3.3
3.234/3.201
3.366/3.399
V
η
Efficiency
V
IN = 12V, ILOAD =5A
82
%
LM2679-5.0
Symbol
Parameter
Conditions
Typical
Min
Max
Units
(Note 3)
(Note 4)
(Note 4)
V
OUT
Output Voltage
V
IN = 8V to 40V, 100mA ≤ IOUT ≤ 5A
5.0
4.900/4.850
5.100/5.150
V
η
Efficiency
V
IN = 12V, ILOAD =5A
84
%
LM2679-12
Symbol
Parameter
Conditions
Typical
Min
Max
Units
(Note 3)
(Note 4)
(Note 4)
V
OUT
Output Voltage
V
IN = 15V to 40V, 100mA ≤ IOUT ≤ 5A
12
11.76/11.64
12.24/12.36
V
η
Efficiency
V
IN = 24V, ILOAD =5A
92
%
LM2679-ADJ
Symbol
Parameter
Conditions
Typ
Min
Max
Units
(Note 3)
(Note 4)
(Note 4)
V
FB
Feedback
Voltage
V
IN = 8V to 40V, 100mA ≤ IOUT ≤ 5A
V
OUT Programmed for 5V
1.21
1.186/1.174
1.234/1.246
V
η
Efficiency
V
IN = 12V, ILOAD =5A
84
%
www.national.com
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