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LM2585S-3.3 데이터시트(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 LM2585S-3.3
상세설명  SIMPLE SWITCHER 3A Flyback Regulator
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제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2585S-3.3 데이터시트(HTML) 4 Page - National Semiconductor (TI)

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Electrical Characteristics (All Versions)
Symbol
Parameters
Conditions
Typical
Min
Max
Units
COMMON DEVICE PARAMETERS for all versions (Note 5)
I
S
Input Supply
(Switch Off)
11
15.5/16.5
mA
Current
(Note 8)
I
SWITCH = 1.8A
50
100/115
mA
V
UV
Input Supply
R
LOAD = 100Ω
3.30
3.05
3.75
V
Undervoltage
Lockout
f
O
Oscillator Frequency
Measured at Switch Pin
R
LOAD = 100Ω
100
85/75
115/125
kHz
V
COMP = 1.0V
f
SC
Short-Circuit
Measured at Switch Pin
Frequency
R
LOAD = 100Ω
25
kHz
V
FEEDBACK = 1.15V
V
EAO
Error Amplifier
Upper Limit
2.8
2.6/2.4
V
Output Swing
(Note 7)
Lower Limit
0.25
0.40/0.55
V
(Note 8)
I
EAO
Error Amp
(Note 9)
Output Current
165
110/70
260/320
µA
(Source or Sink)
I
SS
Soft Start Current
V
FEEDBACK = 0.92V
11.0
8.0/7.0
17.0/19.0
µA
V
COMP = 1.0V
D
Maximum Duty
R
LOAD = 100Ω
98
93/90
%
Cycle
(Note 7)
I
L
Switch Leakage
Switch Off
15
300/600
µA
Current
V
SWITCH = 60V
V
SUS
Switch Sustaining
dV/dT = 1.5V/ns
65
V
Voltage
V
SAT
Switch Saturation
I
SWITCH = 3.0A
0.45
0.65/0.9
V
Voltage
I
CL
NPN Switch
4.0
3.0
7.0
A
Current Limit
θ
JA
Thermal Resistance
T Package, Junction to
Ambient (Note 10)
65
θ
JA
T Package, Junction to
Ambient (Note 11)
45
θ
JC
T Package, Junction to
Case
2
θ
JA
S Package, Junction to
Ambient (Note 12)
56
˚C/W
θ
JA
S Package, Junction to
Ambient (Note 13)
35
θ
JA
S Package, Junction to
Ambient (Note 14)
26
θ
JC
S Package, Junction to
Case
2
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions the device is intended to
be functional, but device parameter specifications may not be guaranteed under these conditions. For guaranteed specifications and test conditions, see the Electrical
Characteristics.
Note 2: Note that switch current and output current are not identical in a step-up regulator. Output current cannot be internally limited when the LM2585 is used as
a step-up regulator. To prevent damage to the switch, the output current must be externally limited to 3A. However, output current is internally limited when the
LM2585 is used as a flyback regulator (see the Application Hints section for more information).
www.national.com
4


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