STC431

STC431 SUNTAC | Alldatasheet

Document overview

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Technical content

Features

• Programmable output voltage to 36 volts
• Sink current capability of 1.0mA to 100mA
• Low dynamic impedance 0.15Ω typical
• Temperature compensated for operation over full rated operating temperature
• Equivalent full-range temperature coefficient of 50ppm/°C (Typical)
• Low output Noise voltage
• Voltage reference tolerance : ±1.0% (Ta=25)

Ordering Information

Type NO. Marking Package Code STC431 STC431 TO-92 Outline Dimensions unit : mm Symbol PIN Connections 1. Reference 2. Anode 3. Cathode 4.5±0.1 4.5±0.1 0.4±0.02 1.27 Typ. 2.54 Typ. 1 2 3 3.45±0.1 2.25±0.1 2.06±0.1 1.20±0.1 0.38 Functional block diagram

A b s o l u t e m a x i m u m r a t i n g s (Operating ambient temperature range applies unless other specified) Parameter Symbol Ratings Unit Cathode to anode voltage V KA 37 V Cathode current range(Continuous) I K -100 ~+150 mA Reference input current range(Continuous) I ref -0.05~+10 mA Power dissipation P D * 700 mW Operating temperature range T opr -40~+85 °C Storage temperature range T stg -65~+150 °C Recommended operating conditions Ratings Parameter Symbol Min. Max. Unit Cathode to Anode voltage V KA V ref 36 V Cathode current range(Continuous) I K 1.0 100 mA E l e c t r i c a l C h a r a c t e r i s t i c s (Ambient temperature at 25°C, unless otherwise noted.) Parameter Symbol Condition Min. Typ. Max. Unit Reference input voltage (Fig. 1, Note 1) Vref V KA=Vref, IK=10mA 2.47 2.495 2.52 V Deviation of reference input voltage Over temperature(Fig. 1, Note 1,2) ∆Vref VKA=Vref , IK=10mA @Ta=TLOW to THIGH - 7.0 30 mV Ratio of change in reference input Voltage to the change in cathode Voltage(Fig. 2) ∆Vref ∆VKA IK=10mA ∆VKA=10V-Vref ∆VKA=36V-10V 1.2 0.7 2.7 2.0 mV/V Reference input current(Fig. 2) I ref IK=10mA Deviation of reference input voltage over temperature(Fig. 2) ∆I ref IK=10mA Minimum cathode current for Regulation(Fig. 1) IMIN V KA=Vref - 0.35 1.0 mA Off-state cathode current(Fig. 3) I OFF V KA=36V, Vref=0V - 2.7 1000 nA Dynamic impedance(Fig. 1, Note 3) Z KA VKA=Vref, f≤1.0KHz IKA=1.0mA-100mA - 0.14 0.5 Ω F i g . 1 F i g . 2 F i g . 3 <Note 1> : T LOW=-40°C, THIGH=+85°C , <Note 2> : ∆Vref= Vref Max. - Vref Min. , <Note 3> : ZKA= ∆VKA/ ∆IK

Fig. 6 ∆∆∆∆ V ref vs. Ta Fig. 8 Gv vs. frequency Fig. 9 Pulse reponse Fig. 5 I MIN vs. VKA Fig. 4 I K vs. VKA Fig. 7 ∆∆∆∆ Vref vs. VKA

STC 431 LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUIT Vi Vo VREF STC 431 Vo=(1+R1/R2)*VREF Vi Vo VREF STC 431 Vo=(1+R1/R2)*VREF LM7805 OUT IN COMMON Vi Vo VREF STC 431 Vo=(1+R1/R2)*VREF Fig 7 Shutdown Regulator Fig 8 Output Control of a Three Fig 9 Higher-current Shunt Regulator -Terminal Fixed Regulator Vi Vo STC 431 Rs RS=VREF/RCL RCL IoVi Vo STC 431 Rs Io IO=VREF/RS Fig 1 0 Constant-current Sink Fig 11 Current Limiting or Current Source Fig 12 Test Circuit For VKA=VREF F i g13T e s tC i r c u i tf o rVKA >= VREF Fig 14Test Circuit For IKA(OFF) INPUT VKA VREF IKA STC 431 IREF VKA=VREF*(1+R1/R2)+IREF*R1 INPUT VKA VREF IKA STC 431 INPUT VKA IKA(OFF) STC 431 TEST CIRCUIT