Model Selection Guide
Model
Number
LF101ESI
LF102ESI
LF103ESI
LF104ESI
LF111ESI
LF112ESI
LF113ESI
LF114ESI
LF151ESI
LF152ESI
LF153ESI
Input
Voltage (VDC)
Nominal
Range
5
4.5 - 5.5
5
4.5 - 5.5
5
4.5 - 5.5
5
4.5 - 5.5
12
10.8 - 13.2
12
10.8 - 13.2
12
10.8 - 13.2
12
10.8 - 13.2
3.3
3.0 - 3.6
3.3
3.0 - 3.6
3.3
3.0 - 3.6
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Efficiency
(%, Typ)
70
75
78
80
72
76
79
81
73
70
70
Fuse Rating
Slow-Blow
(mA)
500
500
500
500
200
200
200
200
750
750
750
Output
Load
Current (mA)
Voltage Current
Current Regulation
Full-Load No-Load (VDC) (mA, Max) (mA, Min) (%, Max)
285
30
5.0
200.0
20.0
15.0
266
30
9.0
111.0
23.0
9.0
256
30
12.0
84.0
17.0
7.5
250
30
15.0
67.0
13.0
7.0
116
15
5.0
200.0
20.0
15.0
110
15
9.0
111.0
23.0
9.0
105
15
12.0
84.0
17.0
7.5
103
15
15.0
67.0
13.0
7.0
415
55
5.0
200.0
20.0
15.0
433
55
9.0
111.0
23.0
9.0
433
55
12.0
84.0
17.0
7.5
Notes:
1. Output load regulation is specified for a load 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 single output units and from each output to common for dual output units.
3. During operation, care must be taken not to exceed the specified input range of the unit or to allow the output
load to drop below the specified minimum (10% of full load). Operating the unit under either of these conditions
could cause damage to the unit.
4. These converters are specified for operation without external components. However, in some applications the
addition of input/output capacitors will enhance stability and reduce output ripple. Recommended capacitor values
are:
Derating Curve
Vin
3.3 VDC
5 VDC
12 VDC
Input
Capacitor
4.7
µF
4.7
µF
2.2
µF
Vout
5 VDC
9 VDC
12 VDC
15 VDC
Output
Capacitor
4.7
µF
2.2
µF
1.0
µF
0.47
µF
For applications requiring very low output noise levels, a simple LC filter should be effective.
5. It is recommended that a fuse be used on the
input of a power supply for protection. See the
Model Selection table above for the correct rating.
Pin Connections
Pin
1
2
3
5
6
Description
Pin Description
-Vin
7
NC
+Vin
8
+Vout
NC
10
NC
-Vout
11
NC
NC
12
NC
NC = No Connection
Recommended Solder Profile
Mechanical Dimensions
Board Layout
Notes:
•
All dimensions are typical in inches (mm)
•
Tolerance x.xx =
±
0.01 (
±
0.25)
•
Pin 1 is marked by a “dot” or indentation on the unit
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•
TEL: (781) 344-8226
•
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•
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