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83

• CURRENT REGULATOR DIODES

• CONSTANT CURRENT OVER WIDE VOLTAGE RANGE

• HIGH SOURCE IMPEDANCE

• METALLURGICALLY BONDED

• DOUBLE PLUG CONSTRUCTION

DCR250

thru

DCR257

FIGURE 1

DESIGN DATA

CASE: Hermetically sealed glass case.

DO-7 outline.

LEAD MATERIAL: Copper clad steel.

LEAD FINISH: Tin / Lead

THERMAL RESISTANCE: (ROJEC):

250

THERMAL IMPEDANCE: (ZOJX): 25

POLARITY: Diode to be operated with

the banded (cathode) end negative.

MOUNTING POSITION: Any

ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified

MINIMUM

MINIMUM

DYNAMIC

KNEE

MAXIMUM

TYPE

REGULATOR CURRENT

IMPEDANCE

IMPEDANCE

LIMITING

PEAK

NUMBER

l p (mA) @ VS = 25V

@VS = 25V

@VK = 6.0 V

VOLTAGE

OPERATING

(Note 1)

ZS (K)

ZK(K)

@ lL = 0.8 l p (min)

VOLTAGE

NOM

MIN

MAX

(Note 2)

(Note 3)

VL (VOLTS)

VOLTS

DCR250

5.10

4.59

5.61

100

4.0

3.67

80

DCR251

5.60

5.04

6.16

90

4.0

4.03

80

DCR252

6.20

5.58

6.82

80

3.0

4.46

70

DCR253

6.80

6.12

7.48

70

2.0

4.90

70

DCR254

7.50

6.75

8.25

50

1.5

5.40

60

DCR255

8.20

7.38

9.02

30

1.5

5.90

60

DCR256

9.10

8.19

10.01

20

1.0

6.55

50

DCR257

10.00

9.00

11.10

10

1.0

7.20

50

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

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