EUROPE

Astec House, Waterfront Business Park

Merry Hill, Dudley

West Midlands, DY5 1LX, UK

Telephone: 44 (1384) 842-211

Facsimile: 44 (1384) 843-355

AMERICAS

5810 Van Allen Way

Carlsbad, CA 92008

Telephone: 760-930-4600

Facsimile: 760-930-0698

2

Ordering Information

www.astecpower.com

ASIA

Units 2111-2116, Level 21

Tower1, Metroplaza

223, Hing Fong Road

Fwai Fong, New Territories

Hong Kong

Telephone: 852-2437-9662

Facsimile: 852-2402-4426

Input

Output

Output

Efficiency

Model Number

Voltage

Voltage

Current

18V to 36V

3.3V

25A

88% Typ

ALO25F24(N) - (6)(S)

NOTES:

OPTIONS

"N" = Negative logic enable (without "N" = positive enable)

“S” = SMT (default is TH)

“6” = 3.7mm pin length option (default pin length is 5mm nominal)

2.30 [58.4]

2.00 [50.8]

0.15 [3.8]

E

- Vin

0.70 [17.8]

0.40 [10.2]

0.10 [2.5]

+ Vin

+ Sense

0.80 [20.3]

0.70 [17.7]

Ø0.04 [Ø1.0](6X)

0.32 [8.1]

PIN SIDE DOWN

PIN SIDE UP

-Output

-Sense

Trim

Ø0.06 [Ø1.6](2X)

0.55 [14.0]

0.40 [10.1]

0.25 [6.3]

0.10 [2.5]

+ Output

0.20 [5.0] NOM.

SIDE VIEW

Single Output

1.

+ Vin

2.

Enable

3.

- Vin

4.

- Vout

5.

- Sense

6.

Trim

7.

+ Sense

8.

Output Rtn

Notes:

1. 20 MHz bandwidth. External 10 uF tant. capacitor

in parallel with 1 uF ceramic capacitor placed

across the output and secondary return ground.

2. Efficiency measurements are typical values taken

3. All specifications are typical at nominal line, full

4. All specifications subject to change without notice.

5. Mechanical drawings are for reference only.

Dimensions are in inches [mm]. Pin placement

tolerance ± 0.005 [0.127]. Mechanical Tolerance ±

0.02 [0.5], recommended surface mount pads (min:

0.080 x 0.112 [2.03 x 2.84] / max: 0092 x 0.124

[2.34 x 3.15]); through hole pin diameter (Pins 4 &

8)

∅ = 0.062 [1.57], others ∅ = 0.04 [1.0] (6X).

6. Safety approval for 3.3V version is available.

7. Technical Reference Notes should be consulted for

detailed information when available.

8. Warranty 1yr.

0.80 [20.3]

2.30 [58.4]

Through Hole

Surface Mount

Astec reserves the right to make changes to the information

contained herein without notice and assumes no liability as a

result of its use or application. (REV02: MARCH 7, 2005)

0.07 [1.7]

0.22 [5.5]

0.35 [8.9]

0.01 [0.4]

PIN SIDE DOWN

PIN SIDE DOWN

PIN SIDE UP

SIDE VIEW

0.70 [17.8]

0.40 [10.2]

0.10 [2.5]

0.06 [1.4]

2.19 [55.7]

0.70 [17.8]

0.55 [14.0]

0.40 [10.2]

0.25 [6.3]

0.10 [2.5]

PIN SIDE UP

SIDE VIEW

Pin Assignments