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LF125S View Datasheet(PDF) - MicroPower Direct, LLC

Part Name
Description
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LF125S Datasheet PDF : 4 Pages
1 2 3 4
Model Selection Guide
Model
Number
Input
Output
Load
Voltage (VDC)
Current (mA) Voltage Current Current Regulation
Nominal Range Full-Load No-Load (VDC) (mA, Max) (mA, Min) (%, Max)
LF101S
5
4.5 - 5.5
250
30
5.0
200.0
4.0
10
LF102S
5
4.5 - 5.5
254
30
9.0
110.0
2.0
10
LF103S
5
4.5 - 5.5
252
30
12.0
84.0
1.5
8
LF104S
5
4.5 - 5.5
248
30
15.0
67.0
1.0
7
LF105S
5
4.5 - 5.5
264
30
3.3
300.0
60.0
10
LF111S
12 10.8 - 13.2 103
15
5.0
200.0
4.0
8
LF112S
12 10.8 - 13.2 106
15
9.0
110.0
2.0
8
LF113S
12 10.8 - 13.2 104
15
12.0
84.0
1.5
5
LF114S
12 10.8 - 13.2 102
15
15.0
67.0
1.0
5
LF115S
12 10.8 - 13.2 110
15
3.3
300.0
60.0
8
LF121S
24 21.6 - 26.4 53
8
5.0
200.0
4.0
8
LF122S
24 21.6 - 26.4 54
8
9.0
110.0
2.0
8
LF123S
24 21.6 - 26.4 52
8
12.0
84.0
1.5
5
LF124S
24 21.6 - 26.4 52
8
15.0
67.0
1.0
5
LF125S
24 21.6 - 26.4 57
8
3.3
300.0
60.0
8
Notes:
1. Load regulation is measured for an output change of 20%
to 100%.
2. When measuring output ripple, it is recommended that an
external 0.33 μF ceramic capacitor be placed from the +Vout
pin to the -Vout pin. For noise sensitive applications, the use
of 0.47 μF capacitors will reduce the output ripple.
3. Operation at no-load will not damage these units. However,
they may not meet all specifications.
4. The converter should be connected to a low ac-impedance
source. An input source with a highly inductive impedance
may affect the stability of the converter. In applications where
the converter output loading is high and input power is sup-
plied over long lines, it may be necessary to use a capacitor
on the input to insure start-up.
In this case, it is recommended that a low ESR (ESR <1.0Ω at
100 kHz) capacitor be mounted close to the converter. For
5V input units a 2.2 μF is recommended, for 12V input units,
a 1.0 μF, and for 24V input units, a 0.47 μF.
5. It is recommended that a fuse be used on the input of a
power supply for protection. See the table above for the
correct rating.
Board Layout
Efficiency
(%, Typ)
80
78
80
81
75
81
78
81
82
75
79
77
80
80
73
Fuse Rating
Slow-Blow
(mA)
500
500
500
500
500
200
200
200
200
200
100
100
100
100
100
Derating Curve
Capacitive Load
μF Max
33
Pin Connections
Pin Description
Pin
1
-Vin
5
2
+Vin
6
3
NA
7
4
-Vout
8
Description
+Vout
NA
NA
NA
MicroPower Direct
www.micropowerdirect.com
 

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