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

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 (KΩ)ZK(KΩ)@ lL = 0.8 l p (min)

VOLTAGE

NOM

MIN

MAX

(Note 2)

(Note 3)

VL (VOLTS)

VOLTS

CDLL250

5.10

4.59

5.61

100

4.0

3.67

80

CDLL251

5.60

5.04

6.16

90

4.0

4.03

80

CDLL252

6.20

5.58

6.82

80

3.0

4.46

70

CDLL253

6.80

6.12

7.48

70

2.0

4.90

70

CDLL254

7.50

6.75

8.25

50

1.5

5.40

60

CDLL255

8.20

7.38

9.02

30

1.5

5.90

60

CDLL256

9.10

8.19

10.01

20

1.0

6.55

50

CDLL257

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

Power Derating: 4 mW / °C above +50°C

• CURRENT REGULATOR DIODES

• LEADLESS PACKAGE FOR SURFACE MOUNT

• CONSTANT CURRENT OVER WIDE VOLTAGE RANGE

• HIGH SOURCE IMPEDANCE

• METALLURGICALLY BONDED

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

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.

CDLL250

thru

CDLL257

MILLIMETERS

INCHES

DIM

MIN

MAX

MIN

MAX

D

2.39

2.66

.094

.105

F

0.41

0.55

.016

.022

G

4.80

5.20

.189

.205

G1

4.11 REF.

.159 REF.

S

0.03 MIN.

.001 MIN.