• CURRENT REGULATOR DIODES CDLL250 thru CDLL257 • LEADLESS PACKAGE FOR SURFACE MOUNT • CONSTANT CURRENT OVER WIDE VOLTAGE RANGE • HIGH SOURCE IMPEDANCE • METALLURGICALLY BONDED MAXIMUM RATINGS Operating Temperature: -65°C to +175°C Storage Temperature: -65°C to +175°C DC Power Dissipation: 500 mW @ +50°C Power Derating: 4 mW / °C above +50°C DIM D F G G1 S ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified TYPE NUMBER REGULATOR CURRENT l p (mA) @ VS = 25V (Note 1) MINIMUM DYNAMIC IMPEDANCE @VS = 25V ZS (K ) MINIMUM KNEE IMPEDANCE @VK = 6.0 V ZK(K ) MAXIMUM LIMITING VOLTAGE @ lL = 0.8 l p (min) PEAK OPERATING VOLTAGE NOM MIN MAX (Note 2) (Note 3) VL (VOLTS) VOLTS CDLL250 CDLL251 CDLL252 CDLL253 5.10 5.60 6.20 6.80 4.59 5.04 5.58 6.12 5.61 6.16 6.82 7.48 100 90 80 70 4.0 4.0 3.0 2.0 3.67 4.03 4.46 4.90 80 80 70 70 CDLL254 CDLL255 CDLL256 CDLL257 7.50 8.20 9.10 10.00 6.75 7.38 8.19 9.00 8.25 9.02 10.01 11.10 50 30 20 10 1.5 1.5 1.0 1.0 5.40 5.90 6.55 7.20 60 60 50 50 MILLIMETERS MIN MAX 2.39 2.66 0.41 0.55 4.80 5.20 4.11 REF. 0.03 MIN. INCHES MIN MAX .094 .105 .016 .022 .189 .205 .159 REF. .001 MIN. FIGURE 1 DESIGN DATA CASE: DO-213AB, Hermetically sealed glass case. (MELF, LL41) LEAD FINISH: Tin / Lead THERMAL RESISTANCE: (ROJEC): 100 °C/W maximum at L = 0 inch NOTE 1 Pulse measurement @ 1% duty cycle, 10 milliseconds maximum. NOTE 2 ZS is derived by superimposing A 90Hz RMS signal equal to 10% of VS on VS NOTE 3 ZK is derived by superimposing A 90Hz RMS signal equal to 10% of VK on VK THERMAL IMPEDANCE: (ZOJX): 25 °C/W maximum POLARITY: Diode to be operated with the band (cathode) end negative. MOUNTING SURFACE SELECTION: The Axial Coefficient of Expansion (COE) Of this Device is Approximately +6PPM/°C. The COE of the Mounting Surface System Should Be Selected To Provide A Suitable Match With This Device. 6 LAKE STREET, LAWRENCE, MASSACHUSETTS 01841 PHONE (978) 620-2600 FAX (978) 689-0803 WEBSITE: http://www.microsemi.com 87