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 augmentation zDrivers Adjustable Output Voltage, VOUT= Vref to 20 V 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 TO-92 SOT-23-5L SOT-353 ( SC-70 ) PART MARKING SOT-23 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 Adjustable Precision Shunt Regulator TYPICAL APPLICATION CIRCUIT BLOCK DIAGRAM ABSOULTE MAXIMUM RATINGS (TA=25℃ unless otherwise specified) Parameter Cathode Voltage Symbol VZ Continuous Cathode Current Value 20 Unit V IZ 100 mA Reference Current IREF 3 Operation Junction Temperature Range Storage Temperature Range Lead Temperature Range (Soldering 10sec.) TJ TSTG -40 ~ +150 -65 ~ +150 mA ℃ ℃ TSOL 260 ℃ TO-92 SOT-23 SOT-23-5L SOT-353 140 206 206 252 ℃/W Thermal Resistance ӨJA 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 Conditions VZ = VREF TA=25℃ Reference Voltage for 432A VREF IZ = 10mA TA=-40℃~+80℃ VZ = VREF TA=25℃ Reference Voltage for 432B VREF IZ = 10mA TA=-40℃~+80℃ TA=-40℃~+80℃ VREF Temp Deviation VDEV VZ = VREF , IZ = 10mA Ratio of change in VREF to ∆VREF / IZ = 10mA change in Cathode voltage ∆VZ ∆VZ = 16V ~ VREF Reference Input Current IREF Temp Deviation Off state Cathode Current Symbol IREF IREF(DEV) IZ(OFF) Dynamic output impedance RZ Minimum Operation Current IZ(MIN) R1=10KΩ, R2= ∞,IZ= 10mA TA=-40℃~+80℃ R1=10KΩ,R2=∞, IZ = 10mA VZ = 6V VREF = 0V VZ = 12V f < 1KHZ , VZ = VREF IZ = 1mA ~ 100mA VZ = VREF Min. 1.234 1.222 1.228 1.215 Typ. Max. Unit 1.24 1.246 V 1.258 1.24 1.252 V 1.265 10 25 mV -1.0 -2.7 mV/ V 0.15 0.5 uA 0.1 0.4 uA 0.5 1.0 uA 0.25 0.4 Ω 30 80 uA APPLICATION CIRCUIT STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA http://www.stansontech.com ST432 2007. V1 ST432 Adjustable Precision Shunt Regulator APPLICATION CIRCUIT 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 ST432 Adjustable Precision Shunt Regulator PERFORMANCE CHARACTERISTICS STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA http://www.stansontech.com ST432 2007. V1 ST432 Adjustable Precision Shunt Regulator PERFORMANCE CHARACTERISTICS STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA http://www.stansontech.com ST432 2007. V1 ST432 Adjustable Precision Shunt Regulator PERFORMANCE CHARACTERISTICS STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA http://www.stansontech.com ST432 2007. V1 ST432 Adjustable Precision Shunt Regulator PERFORMANCE CHARACTERISTICS STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA http://www.stansontech.com ST432 2007. V1 ST432 Adjustable Precision Shunt Regulator SOT-23 PACKAGE OUTLINE STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA http://www.stansontech.com ST432 2007. V1 ST432 Adjustable Precision Shunt Regulator SOT-23-5L PACKAGE OUTLINE STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA http://www.stansontech.com ST432 2007. V1 ST432 Adjustable Precision Shunt Regulator TO-92 PACKAGE OUTLINE STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA http://www.stansontech.com ST432 2007. V1 ST432 Adjustable Precision Shunt Regulator SOT-353 PACKAGE OUTLINE STANSON TECHNOLOGY 120 Bentley Square, Mountain View, Ca 94040 USA http://www.stansontech.com ST432 2007. V1