Model Selection Guide
Input
Model
Number
LF201ES
LF202ES
LF203ES
LF204ES
LF211ES
LF212ES
LF213ES
LF214ES
Voltage (VDC)
Nominal
5
5
5
5
12
12
12
12
Range
4.5 - 5.5
4.5 - 5.5
4.5 - 5.5
4.5 - 5.5
10.8 - 13.2
10.8 - 13.2
10.8 - 13.2
10.8 - 13.2
Current (mA)
Full-Load
494
487
477
475
203
201
197
196
No-Load
30
30
30
30
15
15
15
15
Voltage
(VDC)
5.0
9.0
12.0
15.0
5.0
9.0
12.0
15.0
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Output
Current
(mA, Max)
400.0
222.0
167.0
133.0
400.0
222.0
167.0
133.0
Current
(mA, Min)
40.0
23.0
17.0
14.0
40.0
23.0
17.0
14.0
Efficiency
(%, Typ)
81
82
84
84
82
83
85
85
Fuse Rating
Slow-Blow
(mA)
500
500
500
500
200
200
200
200
Notes:
1. Output load regulation is specified for a load change of 10% 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.
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 ap-
plications the addition of input/output capacitors will enhance stability and reduce output ripple.
Recommended capacitor values are:
Derating Curve
Vin
5 VDC
12 VDC
Input
Capacitor
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
7
Function
Pin Function
-Vin
8
NC
+Vin
9
NC
NC
10
NC
NC
12
NC
-Vout
13
NC
+Vout
14
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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