CDIDI CDLL256, CDLL255, CDLL254, CDLL253, CDLL252 Datasheet
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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)Z
K
(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 VSon V
S
NOTE 3 ZKis derived by superimposing A 90Hz RMS signal equal to 10% of VKon V
K
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: (R
O
JEC
):
100 ˚C/W maximum at L = 0 inch
THERMAL IMPEDANCE: (Z
OJX
): 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.
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