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LM2587 Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM2587
Description  SIMPLE SWITCHER 5A Flyback Regulator
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2587 Datasheet(HTML) 2 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 Voltage
−0.4V
≤ V
IN ≤ 45V
Switch Voltage
−0.4V
≤ V
SW ≤ 65V
Switch Current (Note 2)
Internally Limited
Compensation Pin Voltage
−0.4V
≤ V
COMP ≤ 2.4V
Feedback Pin Voltage
−0.4V
≤ V
FB ≤ 2VOUT
Storage Temperature Range
−65˚C to +150˚C
Lead Temperature
(Soldering, 10 sec.)
260˚C
Maximum Junction
Temperature (Note 3)
150˚C
Power Dissipation (Note 3)
Internally Limited
Minimum ESD Rating
(C = 100 pF, R = 1.5 k
2kV
Operating Ratings
Supply Voltage
4V
≤ V
IN ≤ 40V
Output Switch Voltage
0V
≤ V
SW ≤ 60V
Output Switch Current
I
SW ≤ 5.0A
Junction Temperature Range
−40˚C
≤ T
J ≤ +125˚C
LM2587-3.3
Electrical Characteristics
Specifications with standard type face are for T
J = 25˚C, and those in bold type face apply over full Operating Temperature
Range. Unless otherwise specified, V
IN = 5V.
Symbol
Parameters
Conditions
Typical
Min
Max
Units
SYSTEM PARAMETERS Test Circuit of
Figure 2 (Note 4)
V
OUT
Output Voltage
V
IN = 4V to 12V
3.3
3.17/3.14
3.43/3.46
V
I
LOAD = 400 mA to 1.75A
∆V
OUT/
Line Regulation
V
IN = 4V to 12V
20
50/100
mV
∆V
IN
I
LOAD = 400 mA
∆V
OUT/
Load Regulation
V
IN = 12V
20
50/100
mV
∆I
LOAD
I
LOAD = 400 mA to 1.75A
η
Efficiency
V
IN = 12V, ILOAD = 1A
75
%
UNIQUE DEVICE PARAMETERS (Note 5)
V
REF
Output Reference
Measured at Feedback Pin
3.3
3.242/3.234
3.358/3.366
V
Voltage
V
COMP = 1.0V
∆V
REF
Reference Voltage
V
IN = 4V to 40V
2.0
mV
Line Regulation
G
M
Error Amp
I
COMP = −30 µA to +30 µA
1.193
0.678
2.259
mmho
Transconductance
V
COMP = 1.0V
A
VOL
Error Amp
V
COMP = 0.5V to 1.6V
260
151/75
V/V
Voltage Gain
R
COMP = 1.0 MΩ (Note 6)
LM2587-5.0
Electrical Characteristics
Specifications with standard type face are for T
J = 25˚C, and those in bold type face apply over full Operating Temperature
Range. Unless otherwise specified, V
IN = 5V.
Symbol
Parameters
Conditions
Typical
Min
Max
Units
SYSTEM PARAMETERS Test Circuit of
Figure 2 (Note 4)
V
OUT
Output Voltage
V
IN = 4V to 12V
5.0
4.80/4.75
5.20/5.25
V
I
LOAD = 500 mA to 1.45A
∆V
OUT/
Line Regulation
V
IN = 4V to 12V
20
50/100
mV
∆V
IN
I
LOAD = 500 mA
∆V
OUT/
Load Regulation
V
IN = 12V
20
50/100
mV
∆I
LOAD
I
LOAD = 500 mA to 1.45A
η
Efficiency
V
IN = 12V, ILOAD = 750 mA
80
%
www.national.com
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