Astec Industry Standard 25 Amps Total Power: Input Voltages: No. of Outputs: 82W 24V Single ALO25 High Efficiency 1/8 Brick Electrical Specs Input Input Range Input Surge 18 to 36 VDC 50V /100ms Efficiency 88%@3.3V Typ Output Special Features • High efficiency (88% Typical) • -40°C to +85°C Ambient Air Operation • Industry standard package 0.8" x 2.3" x 0.34" • High capacitive load limit on start-up • ON/OFF Enable • Remote sense compensation • Basic insulation • Regulation to zero load • Fixed frequency switching Line Regulation Load Regulation ±0.1% 10mV Typ Output Voltage Setpoint ±1% Noise/Ripple Remote sense Transient Response 40mV Typ Up to 10% of Vo 5%Vo (typ) deviation 50% to 75% Load change 100µs (typ) recovery time 125% typ 110% nominal output 660kHz typ Overvoltage Protection Current Limit Switching Frequency Control Voltage Adjust 90 to 110% Vo Enable TTL compatible (positive & negative enable options) Environmental Ambient air operating temperature range: -40°C to +85°C Storage temperature: -40°C to +125°C Overtemperature protection: 115°C PCB temperature (Typical) MTBF: > 1 million hours Safety UL,cUL 60950 TUV 1 EN60950 North America (USA): 1-888-41-ASTEC Europe (UK): 44 (1384) 842-211 Asia (HK): 852-2437-9662 AMERICAS EUROPE ASIA 5810 Van Allen Way Carlsbad, CA 92008 Telephone: 760-930-4600 Facsimile: 760-930-0698 Astec House, Waterfront Business Park Merry Hill, Dudley West Midlands, DY5 1LX, UK Telephone: 44 (1384) 842-211 Facsimile: 44 (1384) 843-355 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 ALO25F24 Ordering Information Input Voltage Output Voltage Output Current Efficiency Model Number 18V to 36V 3.3V 25A 88% Typ ALO25F24(N) - (6)(S) NOTES: Efficiency values taken at nominal input full load condition, 25 oC ambient temperature. 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) Through Hole 2.30 [58.4] Pin Assignments + Output + Sense 0.80 [20.3]Trim -Sense -Output + Vin E Single Output - Vin 1. 2. 3. 4. 5. 6. 7. 8. + Vin Enable - Vin - Vout - Sense Trim + Sense Output Rtn 0.32 [8.1] 0.20 [5.0] NOM. 2.00 [50.8] 0.40 [10.2] 0.10 [2.5] 0.10 [2.5] 0.25 [6.3] 0.15 [3.8] 0.40 [10.1] 0.55 [14.0] 0.70 [17.7] 0.70 [17.8] Ø0.04 [Ø1.0](6X) PIN SIDEUP UP PIN SIDE Ø0.06 [Ø1.6](2X) SIDE VIEW SIDE VIEW Surface Mount 2.30 [58.4] 0.80 [20.3] 0.35 [8.9] PIN SIDE DOWN 0.22 [5.5] 0.07 [1.7] SIDE VIEW 0.01 [0.4] 0.70 [17.8] 2.19 [55.7] 0.40 [10.2] 0.10 [2.5] 0.06 [1.4] 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) 0.10 [2.5] 0.25 [6.3] 0.40 [10.2] 0.55 [14.0] 0.70 [17.8] Astec Industry Standard 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 at full load, nominal line and T A = 25°C. 3. All specifications are typical at nominal line, full load and T A = 25°C unless otherwise noted. 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. PIN DOWN PINSIDE SIDE DOWN PIN SIDE UP www.astecpower.com 2