• CURRENT REGULATOR DIODES
• CONSTANT CURRENT OVER WIDE VOLTAGE RANGE
• HIGH SOURCE IMPEDANCE
DCR250
thru
DCR257
• METALLURGICALLY BONDED
• DOUBLE PLUG CONSTRUCTION
MAXIMUM RATINGS
Operating Temperature: -65°C to +175°C
Storage Temperature: -65°C to +175°C
DC Power Dissipation: 500 mW @ +50°C @ T
Power Derating: 4 mW / °C above +50°C
L = 3/8”
ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified
MINIMUM
DYNAMIC
IMPEDANCE
MINIMUM
KNEE
IMPEDANCE
MAXIMUM
LIMITING
VOLTAGE
TYPE
REGULATOR CURRENT
PEAK
NUMBER
l p (mA) @ V = 25V
S
@V = 25V
S
@V = 6.0 V
K
OPERATING
VOLTAGE
(Note 1)
Z
(K )
Z
(K )
@ l = 0.8 l p (min)
L
S
K
NOM
MIN
MAX
(Note 2)
(Note 3)
V
(VOLTS)
VOLTS
L
FIGURE 1
DCR250
DCR251
DCR252
DCR253
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
4.0
4.0
3.0
2.0
3.67
4.03
4.46
4.90
80
80
70
70
70
DCR254
DCR255
DCR256
DCR257
7.50
8.20
9.10
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
DESIGN DATA
10.00
CASE: Hermetically sealed glass case.
DO-7 outline.
LEAD MATERIAL: Copper clad steel.
LEAD FINISH: Tin / Lead
NOTE 1
NOTE 2
NOTE 3
Pulse measurement @ 1% duty cycle, 10 milliseconds maximum.
THERMAL RESISTANCE: (R
):
OJEC
250 °C/W maximum at L = .375 inch
Z
Z
is derived by superimposing A 90Hz RMS signal equal to 10% of V on V
S
S
S
K
is derived by superimposing A 90Hz RMS signal equal to 10% of V on V
K
K
THERMAL IMPEDANCE: (Z
°C/W maximum
): 25
OJX
POLARITY: Diode to be operated with
the banded (cathode) end negative.
MOUNTING POSITION: Any
6 LAKE STREET, LAWRENCE, MASSACHUSETTS 01841
PHONE (978) 620-2600
FAX (978) 689-0803
WEBSITE: http://www.microsemi.com
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