Stanson ST432AS23RG, ST432AS25RG, ST432AS35RG, ST432BS23RG, ST432BS25RG Schematic [ru]
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ST432
Adjustable Precision Shunt Regulator
DESCRIPTION
ST432 is low-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 VREF (1.24V) and 20V 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 ST432 excellent
replacements for low-voltage Zener diodes in many applications, including onboard
regulation and adjustable power supplies.
FEATURES
z Low-Voltage Operation down to 1.24 V
Drivers augmentation
z Adjustable Output Voltage, V
to 20 V
OUT= Vref
z Low Operational Cathode Current 80uA
z 0.25Ω Typical Output Impedance
APPLICATIONS
z Battery Power Equipment
z Linear Regulators
z Switch Power Supply
z Cellular Phone
z Digital Camera
z Computer Disk
PIN CONFIGURATION
SOT-23 TO-92 SOT-23-5L SOT-353 ( SC-70 )
PART MARKING
SOT-23 TO-92 SOT-23-5L SOT-353 ( SC-70 )
STANSON TECHNOLOGY
120 Bentley Square, Mountain View, Ca 94040 USA
http://www.stansontech.com
ST432 2007. V1
ST432
Adjustable Precision Shunt Regulator
PIN DESCRIPTION
Pin Symbol Description
1 R REF
2 C CATHODE
3 A ANODE
ORDERING INFORMATION
Part Number Voltage Tolerance Package Part Marking
ST432AS23RG 0.5% SOT-23 32AYW
ST432BS23RG 1.0% SOT-23 32BYW
ST432AS25RG 0.5% SOT-23-5L 32AYW
ST432BS25RG 1.0% SOT-23-5L 32BYW
ST432BT92AG 1.0% TO-92 SP432B
ST432AS35RG 0.5% SOT-353 32AYW
ST432BS35RG 1.0% SOT-353 32BYW
※ Week Code : A ~ Z ( 1 ~ 26 ) ; a ~ z ( 27 ~ 52 )
※ ST432XS23RG : X: Tolerance; R: Tape Reel; A: Tape Ammo; G: Pb – Free
STANSON TECHNOLOGY
120 Bentley Square, Mountain View, Ca 94040 USA
http://www.stansontech.com
ST432 2007. V1
ST432
TYPICAL APPLICATION CIRCUIT
BLOCK DIAGRAM
Adjustable Precision Shunt Regulator
ABSOULTE MAXIMUM RATINGS (T
A=25℃ unless otherwise specified)
Parameter Symbol Value Unit
Cathode Voltage VZ 20 V
Continuous Cathode Current IZ 100 mA
Reference Current IREF 3 mA
Operation Junction Temperature Range TJ -40 ~ +150
Storage Temperature Range TSTG -65 ~ +150
Lead Temperature Range
(Soldering 10sec.)
SOL 260
T
℃
℃
℃
TO-92 140
Thermal Resistance
JA
Ө
SOT-23 206
SOT-23-5L 206
℃/W
SOT-353 252
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.
STANSON TECHNOLOGY
120 Bentley Square, Mountain View, Ca 94040 USA
http://www.stansontech.com
ST432 2007. V1
ST432
Adjustable Precision Shunt Regulator
ELECTRICAL CHARACTERISTICS (TA=25℃, unless otherwise specified)
SP432AS23RG & SP432AS25RG & SP432AS35RG
Parameter Symbol
Reference Voltage for 432A VREF
Reference Voltage for 432B VREF
VREF Temp Deviation VDEV
Ratio of change in VREF to
change in Cathode voltage
∆VREF /
Z
∆V
V
Z = VREF
Z = 10mA
I
V
Z = VREF
Z = 10mA
I
T
A=-40℃~+80℃
V
Z = VREF , IZ = 10mA
I
Z = 10mA
∆V
Conditions Min. Typ. Max. Unit
TA=25℃
T
A=-40℃~+80℃
TA=25℃
A=-40℃~+80℃
T
1.234 1.24 1.246
1.222 1.258
1.228 1.24 1.252
1.215 1.265
V
V
10 25 mV
mV/
V
Z = 16V ~ VREF
-1.0 -2.7
Reference Input Current IREF R1=10KΩ, R2= ∞,IZ= 10mA 0.15 0.5 uA
T
IREF Temp Deviation IREF(DEV)
A=-40℃~+80℃
R1=10KΩ,R2=∞, I
Off state Cathode Current IZ(OFF) VREF = 0V
Dynamic output impedance RZ
f < 1KHZ , VZ = VREF
Z = 1mA ~ 100mA
I
Z = 10mA
VZ = 6V
V
Z = 12V
0.1 0.4 uA
0.5 1.0 uA
0.25 0.4 Ω
Minimum Operation Current IZ(MIN) VZ = VREF 30 80 uA
APPLICATION CIRCUIT
STANSON TECHNOLOGY
120 Bentley Square, Mountain View, Ca 94040 USA
http://www.stansontech.com
ST432 2007. V1
ST432
APPLICATION CIRCUIT
Adjustable Precision Shunt Regulator
To improve the stability of output voltage, a 0.1uf
capacitor is recommended between cathodes to
anode
STANSON TECHNOLOGY
120 Bentley Square, Mountain View, Ca 94040 USA
http://www.stansontech.com
ST432 2007. V1
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