Model Selection Guide
Input
Full-Load
Output
Current
(mA, Max) (mA, Min)
Fuse Rating
Slow-Blow
(mA)
Reflected
Ripple Cur.
(mA)
Model
Efficiency
(%, Typ)
Voltage (VDC)
Number
Current (mA)
Voltage
(VDC)
3.3
Current
Nominal
12
Range
No-Load
LF501RW
LF502RW
LF503RW
LF504RW
LF505RW
LF506RW
LF507RW
LF511RW
LF512RW
LF513RW
LF514RW
LF515RW
LF516RW
LF517RW
LF521RW
LF522RW
LF523RW
LF524RW
LF525RW
LF526RW
LF527RW
Notes:
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
9.0 - 18.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
18.0 - 36.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
36.0 - 75.0
434
521
502
502
521
501
503
212
254
245
245
254
245
246
106
127
123
122
127
122
123
20
20
20
20
20
20
20
5
1,200
1,000
417
333
500
208
167
1,200
1,000
417
333
500
208
167
1,200
1,000
417
333
500
120.0
100.0
41.7
33.3
50.0
20.8
16.7
120.0
100.0
41.7
33.3
50.0
20.8
16.7
120.0
100.0
41.7
33.3
50.0
20.8
16.7
25
25
25
25
25
25
25
15
15
15
15
15
15
15
10
10
10
10
10
10
10
76
80
83
83
80
83
83
78
82
85
85
82
85
85
78
82
85
85
82
85
85
1,500
1,500
1,500
1,500
1,500
1,500
1,500
700
700
700
700
700
700
700
350
350
350
350
350
350
12
12
12
12
12
12
24
24
24
24
24
24
24
48
48
48
5.0
12.0
15.0
5.0
12.0
15.0
3.3
5
5
5
5
5
5
3
3
3
3
3
3
5.0
12.0
15.0
5.0
12.0
15.0
3.3
5.0
12.0
15.0
5.0
12.0
15.0
48
48
48
48
208
167
3
350
Derating Curve
1. When measuring output ripple, it is recommended that an external 0.47 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. For noise sensitive applications, the use of 3.3 µF capacitors
will reduce the output ripple.
2. Transient recovery is measured to within a 1% error band for a load step change of 75% to
100%.
3. No-load operation will not damage these units, however, they may not meet specifications.
4. Dual output units may provide a 10V, 24V or 30V output. To do this, connect the load across
the positive (+Vout) and negative (-Vout) outputs and float the output common.
5. 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 supplied 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 12V
input units a 4.7 µF is recommended, and for 24V & 48V units a 2.2 µF.
6. 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.
Remote ON/OFF
Parameter
Condition
2.5 to 5.5 or Open Circuit
-0.7 to 0.8
Units
VDC
VDC
mA
Supply On
Supply Off
Standby Input Current
Mechanical Dimensions
10
Control Common
Referenced to Negative Input (-Vin)
Remote ON/OFF Notes:
1. Maximum sink current at the
on/off pin (pin 1) during a
logic low is 300 µA.
2. Maximum allowable leakage
current of a switch connect-
ed to the on/off terminal
(Pin 1) at logic high (2.5V to
100V) is 200 µA.
Capacitive
Load
Single
Output (Max)
Pin Connections
Pin
1
Single
Dual
On/Off On/Off
680 µF
2
3
9
-Vin
-Vin
NC
NC
NC
-Vin
-Vin
Common
NC
-Vout
NC
NC
Dual
Output (Max)
100 µF
10
11
12
13
14
15
16
22
23
24
Board Layout
NC
NC
+Vout
NC
-Vout Common
+Vin
+Vin
NC
+Vout
NC
+Vin
+Vin
NC
NC: No Connection
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
MicroPower Direct
•
www.micropowerdirect.com
292 Page Street Ste D Stoughton, MA 02072
•
TEL: (781) 344-8226
FAX: (781) 344-8481
•
E-Mail: sales@micropowerdirect.com
MPD [ MICROPOWER DIRECT, LLC ]
