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LM2670 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM2670
Description  SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2670 Datasheet(HTML) 3 Page - National Semiconductor (TI)

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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
ON/OFF 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. Sync pin open
circuited.
LM2670-3.3
Symbol
Parameter
Conditions
Typical
Min
Max
Units
(Note 3)
(Note 4)
(Note 4)
V
OUT
Output Voltage
V
IN = 8V to 40V, 100mA
? I
OUT
? 3A
3.3
3.234/3.201
3.366/3.399
V
?
Efficiency
V
IN = 12V, ILOAD =3A
86
%
LM2670-5.0
Symbol
Parameter
Conditions
Typical
Min
Max
Units
(Note 3)
(Note 4)
(Note 4)
V
OUT
Output Voltage
V
IN = 8V to 40V, 100mA
? I
OUT
? 3A
5.0
4.900/4.850
5.100/5.150
V
?
Efficiency
V
IN = 12V, ILOAD =3A
88
%
LM2670-12
Symbol
Parameter
Conditions
Typical
Min
Max
Units
(Note 3)
(Note 4)
(Note 4)
V
OUT
Output Voltage
V
IN = 15V to 40V, 100mA
? I
OUT
? 3A
12
11.76/11.64
12.24/12.36
V
?
Efficiency
V
IN = 24V, ILOAD =3A
94
%
LM2670-ADJ
Symbol
Parameter
Conditions
Typ
Min
Max
Units
(Note 3)
(Note 4)
(Note 4)
V
FB
Feedback
Voltage
V
IN = 8V to 40V, 100mA
? I
OUT
? 3A
V
OUT Programmed for 5V
1.21
1.186/1.174
1.234/1.246
V
?
Efficiency
V
IN = 12V, ILOAD =3A
88
%
www.national.com
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