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
0.2Ω Typical Output Impedance
PIN CONFIGURATION ( TO-92 )
PART MARKING ( TO-92 )
2007/07/15
Ver.3
Page 1
SP431
High Voltage Adjustable Precision Shunt Regulators
PIN DESCRIPTION
Pin
1
2
3
Symbol
R
C
A
Description
REF
CATHODE
ANODE
ORDERING INFORMATION
Part Number
Voltage Tolerance
Package
SP431AT92AG
1.0%
TO-92
SP431BT92AG
0.5%
TO-92
※
Week Code : A ~ Z ( 1 ~ 26 ) ; a ~ z ( 27 ~ 52 )
※
SP431AT92AG / SP431BT92AG : Tape Ammo ; Pb-Free
Part Marking
SP431A
SP431B
BLOCK DIAGRAM
2007/07/15
Ver.3
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)
SP431XT92AG
Parameter
Reference Voltage
VREF Temp Deviation
Symbol
V
REF
V
DEV
V
Z
= V
REF
I
Z
= 10mA
Conditions
SP431AT92AG
SP431BT92AG
Min.
2.475
2.487
Typ.
2.5
2.5
10
-1.4
2
0.8
0.1
0.25
0.4
Max.
2.525
V
2.513
25
-2.7
4
2.5
0.5
0.5
0.7
mV
mV / V
uA
uA
uA
Ω
mA
Unit
T
A
=-40
℃
~+80
℃
V
Z
= V
REF
, I
Z
= 10mA
Ratio of change in VREF to change
ΔV
REF
/ I
Z
= 10mA
in Cathode voltage
ΔV
Z
ΔV
Z
= 36V ~ V
REF
R
1
=10KΩ , R
2
=
∞
,
Reference Input
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
2007/07/15
Ver.3
Page 3
SP431
High Voltage Adjustable Precision Shunt Regulators
TESTING CIRCUIT
2007/07/15
Ver.3
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
2007/07/15
Ver.3
Page 5
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