Derating Curve

Board Layout

Pin Connections

Pin

Single

Dual

1

On/Off

On/Off

2

-Vin

-Vin

3

-Vin

-Vin

9

NC

Common

10

NC

NC

11

NC

-Vout

12

NC

NC

13

NC

NC

14

+Vout

+Vout

15

NC

NC

16

-Vout

Common

22

+Vin

+Vin

23

+Vin

+Vin

24

NC

NC

NC: No Connection

Model

Number

Input

Output

Reflected

Ripple Cur.

(mA)

Efficiency

(%, Typ)

Fuse Rating

Slow-Blow

(mA)

Voltage

(VDC)

Current

(mA, Max)

Current

(mA, Min)

Nominal

Range

Full-Load

No-Load

LF501RU

24

9.0 - 36.0

217

20

3.3

1,200

120.0

15

76

1,500

LF502RU

24

9.0 - 36.0

260

20

5.0

1,000

100.0

15

80

1,500

LF503RU

24

9.0 - 36.0

251

20

12.0

417

41.7

15

83

1,500

LF504RU

24

9.0 - 36.0

251

20

15.0

333

33.3

15

83

1,500

LF505RU

24

9.0 - 36.0

260

20

±5.0

±500

±50.0

15

80

1,500

LF506RU

24

9.0 - 36.0

251

20

±12.0

±208

±20.8

15

83

1,500

LF507RU

24

9.0 - 36.0

252

20

±15.0

±167

±16.7

15

83

1,500

LF511RU

48

18.0 - 75.0

109

10

3.3

1,200

120.0

10

76

700

LF512RU

48

18.0 - 75.0

130

10

5.0

1,000

100.0

10

80

700

LF513RU

48

18.0 - 75.0

126

10

12.0

417

41.7

10

83

700

LF514RU

48

18.0 - 75.0

125

10

15.0

333

33.3

10

83

700

LF515RU

48

18.0 - 75.0

130

10

±5.0

±500

±50.0

10

80

700

LF516RU

48

18.0 - 75.0

125

10

±12.0

±208

±20.8

10

83

700

LF517RU

48

18.0 - 75.0

126

10

±15.0

±167

±16.7

10

83

700

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292 Page Street Ste D Stoughton, MA 02072

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Model Selection Guide

Mechanical Dimensions

Notes:

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 imped-

ance 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 <1.0

 at 100 kHz) capacitor be mounted close to the converter.For

24V input units a 4.7 µF is recommended, and for 48V units a 2.2 µF.

6. Maximum capacitive load for 3.3V & 5V units is 2,000 µF, for 12V units 470 µF, for 15V & ±12V units 330 µF, for

±5V units 680 µF, and for ±15V units 220 µF.

7. 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 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 connected to the on/off terminal

(Pin 1) at logic high (2.5V to 100V) is 200 µA.

Parameter

Condition

Units

Supply On

2.5 to 5.5 or Open Circuit

VDC

Supply Off

-0.7 to 0.8

VDC

Standby Input Current

10

mA

Control Common

Referenced to Negative Input (-Vin)

Remote ON/OFF

Notes:

inches (mm)