SST502 Series
Vishay Siliconix
Document Number: 70711
S-04234—Rev. C, 02-Jul-01 www.vishay.com
3-1
Current Regulator Diodes—POV(min) 45 V
SST502 SST504 SST506 SST508 SST510
SST503 SST505 SST507 SST509 SST511
PRODUCT SUMMARY
Part Typ I Part Typ IPart
Number Typ IF
(mA) Marking Part
Number Typ IF
(mA) Marking
SST502 0.43 L2 SST507 1.80 L7
SST503 0.56 L3 SST508 2.40 L8
SST504 0.75 L4 SST509 3.00 L9
SST505 1.00 L5 SST510 3.60 L0
SST506 1.40 L6 SST511 4.70 L1
FEATURES BENEFITS APPLICATIONS
DSurface-Mount Package
DGuaranteed "20% Tolerance
DOperation from 1 V (SST502, 3)
to 45 V
DGood Temperature Stability
DSimple Series Circuitry, No Separate Voltage Source
DTight Guaranteed Circuit Performance
DExcellent Performance in Low-Voltage/Battery
Circuits and High-Voltage Spike Protection
DHigh Circuit Stability vs. Temperature
DConstant-Current Supply
DCurrent-Limiting
DTiming Circuits
DESCRIPTION
The SST502 series is a family of "20% range current
regulators designed for demanding applications in test
equipment and instrumentation. These devices utilize the
JFET techniques to produce a device which is extremely
simple to operate.
With nominal current ranges from 0.43 mA to 4.7 mA, the
SST502 series will meet a wide array of design requirements.
The low-cost TO-236 surface-mount package ensures a
cost-effective design solution.
SCHEMATIC DIAGRAM APPLICATIONS
C
A
1
2
V+
Current
Source V–
Current
Sink
V+
Out
Linear Ramp Generator
Anode
*
Cathode
Top View
2
3
TO-236
(SOT-23)
1
*Short lead #2 to Cathode (lead #3)
via circuit board trace.
SST502 Series
Vishay Siliconix
www.vishay.com
3-2 Document Number: 70711
S-04234—Rev. C, 02-Jul-01
ABSOLUTE MAXIMUM RATINGS
Peak Operating Voltage 45 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reverse Current 50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature –55 to 150_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipationa350 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Notes:
a. Derate 2.8 mW/_C above 25_C
SPECIFICATIONS (TA = 25_C) UNLESS OTHERWISE NOTED
Limits
Parameter Symbol Test Conditions Min TypaMax Unit
Peak Operating VoltagebPOV IF = 1.1 IF(max) 45 55
Reverse Voltage VRIR = 1 mA 0.8 V
Capacitance CFVF = 25 V, f = 1 MHz 1.5 pF
Regulator Currentc
(IF)Dynamic Impedanced
(Zd)
Knee
Impedance
(Zk)
Limiting
Voltage e
(VL)
Temperature
Coefficient
(q1)
VF = 25 V VF = 25 V VF = 6 V IF = 0.8 IF(min) VF = 25 V
0_C v TA v 100_C
mA MWMWV%/_C
Part Number Min Nom Max Min TypaTypaMax TypaTypa
SST502 0.344 0.43 0.516 1.0 2.7 0.7 1.5 0.6 –0.08
SST503 0.448 0.56 0.672 0.7 2.0 0.5 1.7 0.7 –0.12
SST504 0.600 0.75 0.900 0.5 1.5 0.4 1.9 0.8 –0.16
SST505 0.800 1.00 1.200 0.4 1.0 0.3 2.1 0.9 –0.20
SST506 1.120 1.40 1.680 0.3 0.8 0.2 2.5 1.1 –0.24
SST507 1.440 1.80 2.160 0.2 0.6 0.12 2.8 1.3 –0.28
SST508 1.900 2.40 2.900 0.1 0.4 0.08 3.1 1.5 –0.31
SST509 2.400 3.00 3.600 0.09 0.3 0.06 3.5 1.7 –0.34
SST510 2.900 3.60 4.300 0.08 0.3 0.04 3.9 1.9 –0.37
SST511 3.800 4.70 5.600 0.07 0.2 0.03 4.2 2.1 –0.40
Notes: NPA
a. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
b. Max VF where IF = 1.1 IF(max) is guaranteed.
c. Pulse test—steady state currents may vary.
d. Pulse test—steady state impedances may vary.
e. Min VF required to insure IF = 0.8 IF(min).
SST502 Series
Vishay Siliconix
Document Number: 70711
S-04234—Rev. C, 02-Jul-01 www.vishay.com
3-3
TYPICAL CHARACTERISTICS (TA = 25_C UNLESS OTHERWISE NOTED)
–0.45
–0.40
–0.35
–0.30
–0.25
–0.20
–0.15
–0.10
–0.05
–0.00
012345
Output Current vs. Forward Voltage
Dynamic Impedance vs. Regulator Current Limiting Voltage @ 0.8 IF vs. Regulator Current
Temperature Coefficient Knee Impedance vs. Regulator Current
5
4
3
0010 50
2
1
20 30 40
(V)
F
V
10
1
0.1
0.01 0.1 1 10
VF = 6 V
IF (mA)
100
10
1
0.1
0.1 1 10
VF = 25 V
IF (mA)
0.1 1 10
10
1
0.1
VF = 25 V
IF (mA)
Output Current vs. Forward Voltage
5
4
3
001 5
2
1
234
SST502
SST505
SST508
SST510
(V)
F
V
SST511
SST510
SST508
SST505
SST502
SST511
IF (mA)
IF (mA)
IF (mA)
Zk (M Ω)
TC (% _C)
Zd (M Ω)
VL (V)
SST502 Series
Vishay Siliconix
www.vishay.com
3-4 Document Number: 70711
S-04234—Rev. C, 02-Jul-01
TYPICAL CHARACTERISTICS (TA = 25_C UNLESS OTHERWISE NOTED)
Temperature Coefficient vs. Regulator Current On-Resistance vs. Regulator Current
Capacitance vs. Forward Voltage
0.1 1 10
0.5
–0.5
0
TJ = 0 to 100_C
VF = 25 V 2
01 5
1
0
IF (mA)IF (mA)
I = 0.1 IF
VF = 25 V
10
050
5
0
VF (V)
f = 1 MHz
10 20 30 40
234
TC (% _C)
rDS(on) – Drain-Source On-Resistance ( Ω )
CT – Total Capacitance (pF)
CURRENT REGULATOR DIODE VĆ1 CHARACTERISTIC
Zk
VL
IFPOV
VR
VRVF
IF
IR
rDS
Legal Disclaimer Notice
Vishay
Document Number: 91000 www.vishay.com
Revision: 08-Apr-05 1
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
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