Model Selection Guide

Remote On/Off

Notes:

1. Measured over a bandwidth of 5 Hz to 20 MHz using a 1 µH inductor.

3. Output ripple is measured at 20 MHz bandwidth using a 1.0 µF ceramic

capacitor and a 10 µF tantalum capacitor connected in parallel as close

to the output terminals as possible. For the SRL05A-12-5.0, when set for

a 5 VDC output, the output ripple and noise is:

Peak to Peak

75 mV P - P

RMS

45 mV RMS

4. Transient recovery is measured to within a 1% error band for a 50% load change.

5. These units include a non-latching over temperature protection circuit. If

the temperature exceeds approximately 120°C at the monitored “hot spot”,

the unit will be shut down. When the temperature decreases, the unit will

automatically restart.

6. These units will provide up to 150% of rated current. In the event of an over

current fault, the unit will go into hiccup mode until the fault is removed.

7. Standard units feature an active high remote control input. See the note

and diagram at right.

8. These units do not include an internal fuse. It is recommended that an

external slow-blow fuse be used with a rating as shown in the table above.

292 Page Street Ste D Stoughton, MA 02072

•

TEL: (781) 344-8226

•

FAX: (781) 344-8481

•

E-Mail: sales@micropowerdirect.com

www.micropowerdirect.com

SRL05A-05-3.3

0.75

Open

1.20

41.71

1.50

22.98

1.80

14.96

2.00

11.75

2.50

6.93

3.30

3.15

3.63

2.20

Model

Number

Input

Output

Efficiency

(%, Typ)

Capacitive

Load

(µF Max)

Fuse Rating

Slow-Blow

(A)

Voltage

(VDC)

Current

(A, Max)

Current

(A, Min)

Range

Full-Load No-Load

SRL05A-05-3.3

3.0 - 5.5

949

25

0.75

5.0

0.0

79

3,000

10

1,412

30

1.20

85

1,724

30

1.50

87

2,022

35

1.80

89

2,222

35

2.00

90

2,217

35

2.50

92

4.5 - 5.5

3,511

35

3.30

94

SRL05A-12-5.0

8.3 - 14.0

428

20

0.75

5.0

0.0

73

3,000

7

625

25

1.20

80

762

25

1.50

82

893

30

1.80

84

980

30

2.00

85

1,197

35

2.50

87

1,545

45

3.30

89

2,264

50

5.00

92

These units include an active high

On/OFF control input. The unit is

“ON” if the input to the control pin

(pin 2) is high; or if the pin is left

open (or floating). The signal level

of the control input is referenced

to ground. A recommended drive

circuit for the control pin is shown

been added to help reduce pos-

sible false triggering of the control

input due to leakage currents.

Units are available with an active

low control input. With this input,

the unit will remain off if the con-

trol input remains above 2.8 VDC.

For more information on the active

low option, contact the factory.

Output Voltage Trim

The output voltage of the SRL05A-05-3.3

models is adjustable over the range of 0.75

VDC to 3.63 VDC. The required resistor value

for various output levels is given in the table

above. To calculate the correct value for a

different output level, the formula is:

(

.

,

5, 110)

R

V0 75

21 070

TRIM

OUT

=

-

-

If a trim resistor is not connected, the output

goes to 0.75 VDC.

The output voltage level of the SRL05A

series is adjustable over a wide range by

the simple addition of an external resistor.

This trim resistor is connected between the

circuit common and the trim input (pin 5),

as shown in the diagram above.

SRL05A-12-5.0

0.75

Open

1.20

22.33

1.50

13.00

1.80

9.00

2.00

7.40

2.50

5.00

3.30

3.12

5.00

1.47

The output voltage of the SRL05A-12-5.0

models is adjustable over the range of 0.75

VDC to 5.00 VDC. The required resistor value

for various output levels is given in the table

above. To calculate the correct value for a

different output level, the formula is:

(

.

,

,)

R

V0 75

10 500

1000

TRIM

OUT

=

-

-

If a trim resistor is not connected, the output

goes to 0.75 VDC.