Model Selection Guide

Mechanical Dimensions

Notes:

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 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 recom-

mended that a low ESR (ESR <1.0

 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 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

Derating Curve

Single

Dual

Capacitive Load

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

LF501RW

12

9.0 - 18.0

434

20

3.3

1,200

120.0

25

76

1,500

LF502RW

12

9.0 - 18.0

521

20

5.0

1,000

100.0

25

80

1,500

LF503RW

12

9.0 - 18.0

502

20

12.0

417

41.7

25

83

1,500

LF504RW

12

9.0 - 18.0

502

20

15.0

333

33.3

25

83

1,500

LF505RW

12

9.0 - 18.0

521

20

±5.0

±500

±50.0

25

80

1,500

LF506RW

12

9.0 - 18.0

501

20

±12.0

±208

±20.8

25

83

1,500

LF507RW

12

9.0 - 18.0

503

20

±15.0

±167

±16.7

25

83

1,500

LF511RW

24

18.0 - 36.0

212

5

3.3

1,200

120.0

15

78

700

LF512RW

24

18.0 - 36.0

254

5

5.0

1,000

100.0

15

82

700

LF513RW

24

18.0 - 36.0

245

5

12.0

417

41.7

15

85

700

LF514RW

24

18.0 - 36.0

245

5

15.0

333

33.3

15

85

700

LF515RW

24

18.0 - 36.0

254

5

±5.0

±500

±50.0

15

82

700

LF516RW

24

18.0 - 36.0

245

5

±12.0

±208

±20.8

15

85

700

LF517RW

24

18.0 - 36.0

246

5

±15.0

±167

±16.7

15

85

700

LF521RW

48

36.0 - 75.0

106

3

3.3

1,200

120.0

10

78

350

LF522RW

48

36.0 - 75.0

127

3

5.0

1,000

100.0

10

82

350

LF523RW

48

36.0 - 75.0

123

3

12.0

417

41.7

10

85

350

LF524RW

48

36.0 - 75.0

122

3

15.0

333

33.3

10

85

350

LF525RW

48

36.0 - 75.0

127

3

±5.0

±500

±50.0

10

82

350

LF526RW

48

36.0 - 75.0

122

3

±12.0

±208

±20.8

10

85

350

LF527RW

48

36.0 - 75.0

123

3

±15.0

±167

±16.7

10

85

350

Ot

t

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