Stanson ST8433AS, ST8433AT, ST8433BS, ST8433BT Schematic [ru]

STANSON TECHNOLOGY

ST8433 (Pb-Free)

Constant Voltage and Constant Current Controller

DESCRIPTION

The ST8433 is high-voltage four-terminal adjustable voltage references, with over current
protection feature. The ST8433 is a one chip solution to a 2.5V precision voltage reference
and constant current output in the application of secondary feedback control of power
supply, DC/DC converter, adaptor and charger. ST8433 is idea for low cost switching
power supply application.

PIN CONFIGURATION
TO-92-4

R: Reference A: Anode C: Cathode
P: Current Enable

YY: Year WW: Week

SOT-23-5L

FEATURE

z Voltage Reference Accuracy of 1%
z Sink Current Capability from 1mA to

100mA

z Adjustable Output Voltage from V

18V

z Low Output Noise
z Typical Output Dynamic Impedance Less

Than 200mΩ

z Available in SOT23-5 and TO92-4

package

z Over Current Protection

APPLICATIONS

z Battery Charger
z Battery Power Equipment
z Linear Regulators
z Switch Power Supply
z Cellular Phone
z Digital Cameras
z Computer Disk Drivers
z Instrumentation

REF to

Y: Year Code W: WEEK

120 Bentley Square, Mountain View, Ca 94040 USA
WWW.STANSONTECH.COM

1

ST8433 2009 V1

STANSON TECHNOLOGY

ST8433 (Pb-Free)

Constant Voltage and Constant Current Controller

ORDERING INFORMATION

Part Number Voltage Tolerance

ST8433ATRG 0.5% TO92-4 ST433A

ST8433BTRG 1.0% TO92-4 ST433B

ST8433ASRG 0.5% SOT23-5L 33xxA

ST8433BSRG 1.0% SOT23-5L 33xxB

Week Code : A ~ Z ; a ~ z

ST8433XTTG S : SOT23-5L ; T : TO92-4 ; T : Tape Box ; G : Pb – Free

Block Diagram

Package Part Marking

ABSOULTE MAXIMUM RATINGS (T

Rating Symbol Values Units

Cathode Voltage VZ 18 V

Continuous Cathode Current Range IZ 150 mA

Reference Current Range I

Operating Junction Temperature Range TJ -40 to +150

Storage Temperature Range T

Lead Temperature Range (Soldering 10Sec)

Thermal Resistance θJA 140

The IC has protection Circuit sgsinst static electricity. Do not apply high static electricity or high voltage that

exceeds the performance of the protection circuit to the IC.

120 Bentley Square, Mountain View, Ca 94040 USA
WWW.STANSONTECH.COM

=25℃ Unless Otherwise Specified)

A

10 mA

REF

-65 to 150

STG

T

260

SOL

2

℃

℃
℃

℃/W

ST8433 2009 V1

STANSON TECHNOLOGY

ST8433 (Pb-Free)

Constant Voltage and Constant Current Controller

ELECTRICAL CHARACTERISTICS (T

=25℃ Unless Otherwise Specified)

A

Parameter Symbol

Reference Input Voltage

(IK=10mA,V

V

Temp Deviation V

REF

Z=VREF

)

Conditions

V

REF

DEV

ST8433A
ST8433B

TA=-40

VZ=V

℃~+80℃

REF

Min Typ Max Units

2.487

2.475

2.5

2.5

2.513

2.525

10 25 mV

IZ=10mA

Ratio Of Change In REF To

Change In Cathode Voltage

Reference Input Current I

△

V

△

REF

V

REF

/

Z

I

=10mA,

Z

△

= 18V~V

V

Z

I

Z

R1=10KΩ

=10mA

REF

-1.4 -2.7 mV/V

1 uA

R2=∞

I

Temp Deviation I

REF

REF(DEV)

TA=-40

R1=10K

℃~+80℃

Ω , R2=

∞

2.5 uA

IZ=10mA

Off-State Cathode Current I

Dynamic Output Impedance RZ

Minimum Operating Current Iz(

Z(OFF)

MIN)

V

=0V , VZ=18V

REF

f<1kHz , V

IZ=1mA~100mA

VZ=V

0.1 uA

Z=VREF

1.0 mA

REF

1.0 1.5 Ω

Current Amplification Iamp VC=1V, IA=50uA 10 mA

Saturation Voltage Vsat

Ic=150mA,

=10mA

I

A

0.8 V

V

Maximum Protection Current I

P

100 mA

120 Bentley Square, Mountain View, Ca 94040 USA
WWW.STANSONTECH.COM

3

ST8433 2009 V1