DCR250

CURRENT REGULATOR DIODES CONSTANT CURRENT OVER WIDE VOLTAGE RANGE HIGH SOURCE IMPEDANCE METALLURGICALLY BONDED DOUBLE PLUG CONSTRUCTION DCR250 thru DCR257 MAXIMUM RATINGS Operating Temperature: -65°C to +175°C Storage Temperature: -65°C to +175°C DC Power Dissipation: 500 mW @ +50°C @ TL = 3/8” Power Derating: 4 mW / °C above +50°C ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified TYPE NUMBER REGULATOR CURRENT l p (mA) @ VS = 25V (Note 1) NOM MIN 4.59 5.04 5.58 6.12 6.75 7.38 8.19 9.00 MAX 5.61 6.16 6.82 7.48 8.25 9.02 10.01 11.10 5.10 5.60 6.20 6.80 7.50 8.20 9.10 10.00 MINIMUM DYNAMIC IMPEDANCE @VS = 25V ZS (KΩ) (Note 2) 100 90 80 70 50 30 20 10 MINIMUM KNEE IMPEDANCE @VK = 6.0 V ZK(KΩ) (Note 3) 4.0 4.0 3.0 2.0 1.5 1.5 1.0 1.0 MAXIMUM LIMITING VOLTAGE @ lL = 0.8 l p (min) VL (VOLTS) 3.67 4.03 4.46 4.90 5.40 5.90 6.55 7.20 PEAK OPERATING VOLTAGE VOLTS 80 80 70 70 60 60 50 50 FIGURE 1 DCR250 DCR251 DCR252 DCR253 DCR254 DCR255 DCR256 DCR257 DESIGN DATA CASE: Hermetically sealed glass case. DO-7 outline. LEAD MATERIAL: Copper clad steel. NOTE 1 NOTE 2 NOTE 3 Pulse measurement @ 1% duty cycle, 10 milliseconds maximum. ZS is derived by superimposing A 90Hz RMS signal equal to 10% of VS on VS ZK is derived by superimposing A 90Hz RMS signal equal to 10% of VK on VK LEAD FINISH: Tin / Lead THERMAL RESISTANCE: (ROJEC): 250 ˚C/W maximum at L = .375 inch THERMAL IMPEDANCE: (ZOJX): 25 ˚C/W maximum POLARITY: Diode to be operated with the banded (cath...