• 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: (R
OJEC):
250 ˚C/W maximum at L = .375 inch
THERMAL IMPEDANCE: (Z
OJX): 25
˚C/W maximum
POLARITY:
Diode to be operated with
the banded (cathode) end negative.
MOUNTING POSITION:
Any
22 COREY STREET, MELROSE, MASSACHUSETTS 02176
PHONE (781) 665-1071
FAX (781) 665-7379
WEBSITE: http://www.cdi-diodes.com
E-mail: mail@cdi-diodes.com
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