Model Selection Guide

Mechanical Dimensions

Notes:

1. Load regulation is measured for an output 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 noise sensitive applications, the use of 0.47

µF capacitors will

reduce the output ripple.

3. Operation at no-load will not damage these units. However, they

may not meet all specifications.

4. 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 5V input units a 2.2

µF is recommended, for 12V input units, a 1.0 µF, and for 24V input

units, a 0.47

µF.

5. Dual output units may be connected to provide a 10 VDC, 24 VDC or

30 VDC output. To do this, connect the load across the positive (+Vout)

and negative (-Vout) outputs and float the output common.

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.

Model

Number

Input

Output

Load

Regulation

(%, Max)

Efficiency

(%, Typ)

Fuse Rating

Slow-Blow

(mA)

Voltage (VDC)

Current (mA)

Voltage

(VDC)

Current

(mA, Max)

Current

(mA, Min)

Nominal

Range

Full-Load

No-Load

LF101DI

5

4.5 - 5.5

277

30

±5.0

±100.0

±2.0

10

72

500

LF102DI

5

4.5 - 5.5

255

30

±12.0

±42.0

±0.8

7

78

500

LF103DI

5

4.5 - 5.5

258

30

±15.0

±34.0

±0.7

7

79

500

LF111DI

12

10.8 - 13.2

112

12

±5.0

±100.0

±2.0

8

74

200

LF112DI

12

10.8 - 13.2

105

12

±12.0

±42.0

±0.8

5

80

200

LF113DI

12

10.8 - 13.2

104

12

±15.0

±34.0

±0.7

5

81

200

LF121DI

24

21.6 - 26.4

57

7

±5.0

±100.0

±2.0

8

72

100

LF122DI

24

21.6 - 26.4

53

7

±12.0

±42.0

±0.8

5

79

100

LF123DI

24

21.6 - 26.4

53

7

±15.0

±34.0

±0.7

5

80

100

Pin

Description

Pin

Description

1-Vin

7

NA

2

+Vin

8

+Vout

3NA

10

NA

5

Common

11

NA

6

-Vout

12

NA

NA = Not available for connection

Pin Connections

±5V Out

µF Max

±12 & ±15V Out

µF Max

10

2.2

Capacitive Load

Board Layout

Derating Curve

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

Notes:

Millimeters x.x =

x.xx =

Pin:

on the unit. The curved edge of the case

indicates the Pin 1 side.