SP431
High Voltage Adjustable Precision Shunt Regulators
DESCRIPTION
The SP431 is high-voltage three-terminal
adjustable voltage references, with specified
thermal stability over applicable industrial and
commercial temperature ranges. Output voltage
can be set to any value between V
REF
(2.5V) and
36V with two external resistors. These devices
have a typical output impedance of 0.25Ω. Active
output circuitry provides a very sharp turn-on
characteristic, making the SP431 excellent
replacements for low-voltage Zener diodes in
many applications, including onboard regulation
and adjustable power supplies.
APPLICATIONS
Battery Power Equipment
Linear Regulators
Switch Power Supply
Cellular Phone
Digital Cameras
Computer Disk Drivers
Instrumentation
FEATURES
Low Output Noise
Adjustable Output Voltage, V
O
= Vref to
36 V
Low Operational Cathode Current
0.25Ω Typical Output Impedance
( SOT-23 )
PIN CONFIGURATION
( SOT-23 )
( TO-92 )
PART MARKING
( SOT-23 )
( SOT-23 )
( TO-92 )
2012/05/16
Ver.2
Page 1
SP431
High Voltage Adjustable Precision Shunt Regulators
PIN DESCRIPTION: SP431AS23RGB/SP431BS23RGB
Pin
1
2
3
Pin
1
2
3
Pin
1
2
3
Symbol
R
C
A
Symbol
R
A
C
Symbol
C
R
A
Description
REF
CATHODE
ANODE
Description
REF
ANODE
CATHODE
Description
CATHODE
REF
ANODE
Part Marking
31AYW
31BYW
31CAYW
31CBYW
SP431A
SP431B
PIN DESCRIPTION: SP431AT92AGB/SP431BT92AGB
PIN DESCRIPTION: SP431CAS23RGB/SP431CBS23RGB
ORDERING INFORMATION
Part Number
Voltage Tolerance
Package
SP431AS23RGB
0.5%
SOT-23
SP431BS23RGB
1.0%
SOT-23
SP431CAS23RGB
0.5%
SOT-23
SP431CBS23RGB
1.0%
SOT-23
SP431AT92AGB
0.5%
TO-92
SP431BT92AGB
1.0%
TO-92
※
Week Code : A ~ Z ( 1 ~ 26 ) ; a ~ z ( 27 ~ 52 )
※
SP431AS23RGB/SP431BS23RGB : Tape Reel ; Pb – Free; Halogen – Free
※
SP431CAS23RGB/SP431CBS23RGB : Tape Reel ; Pb – Free; Halogen – Free
※
SP431AT92AGB/SP431BT92AGB : Tape Ammo ; Pb – Free; Halogen – Free
BLOCK DIAGRAM
2012/05/16
Ver.2
Page 2
SP431
High Voltage Adjustable Precision Shunt Regulators
ABSOULTE MAXIMUM RATINGS
(T
A
=25
℃
Unless otherwise specified)
Parameter
Cathode Voltage
Continuous Cathode Current
Reference Current
Operation Junction Temperature
Range
Storage Temperature Range
Lead Temperature Range
(Soldering 10sec.)
Thermal Resistance
Symbol
V
Z
I
Z
I
REF
T
J
T
STG
T
SOL
Ө
JA
Value
37
150
10
-40 ~ +150
-65 ~ +150
260
140
Unit
V
mA
mA
℃
℃
℃
℃
/W
The IC has a protection circuit against static electricity. Do not apply high static electricity or high voltage that
exceeds the performance of the protection circuit to the IC.
ELECTRICAL CHARACTERISTICS
(T
A
=25℃ , Unless otherwise specified)
Parameter
Symbol
Conditions
Min.
2.482
Typ.
2.495
Max.
2.508
V
2.47
2.495
10
-1.4
2
0.8
0.1
0.25
0.4
2.52
25
-2.7
4
2.5
0.5
0.5
0.7
mV
mV / V
uA
uA
uA
Ω
mA
Unit
SP431AS23RGB
SP431CAS23RGB
V
Z
= V
REF
SP431AT92AGB
Reference Voltage
V
REF
I
Z
= 10mA
SP431BS23RGB
SP431CBS23RGB
SP431BT92AGB
T
A
=-40
℃
~+80
℃
VREF Temp Deviation
V
DEV
V
Z
= V
REF
, I
Z
= 10mA
Ratio of change in VREF to change
∆V
REF
/ I
Z
= 10mA
in Cathode voltage
∆V
Z
∆V
Z
= 36V ~ V
REF
Reference Input
R
1
=10KΩ , R
2
=
∞
,
I
REF
Current
I
Z
= 10mA
T
A
=-40
℃
~+80
℃
IREF Temp Deviation
I
REF(DEV)
R
1
=10KΩ , R2 =
∞
,
I
Z
= 10mA
Off state Cathode Current
I
Z(OFF)
V
REF
= 0V V
Z
= 36V
f < 1KHZ , V
Z
= V
REF
Dynamic output impedance
R
Z
I
Z
= 1mA ~ 100mA
Minimum Operation Current
I
Z(MIN)
V
Z
= V
REF
2012/05/16
Ver.2
Page 3
SP431
High Voltage Adjustable Precision Shunt Regulators
TESTING CIRCUIT
2012/05/16
Ver.2
Page 4
SP431
High Voltage Adjustable Precision Shunt Regulators
APPLICATION CIRCUIT
Shunt Regulator
Single-Supply Comparator With Temperature-Compensated Threshold
Precision High-Current Series Regulator
2012/05/16
Ver.2
Page 5
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