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KL431K Dataheets PDF



Part Number KL431K
Manufacturers Kexin
Logo Kexin
Description Adjustable Accurate Reference Source
Datasheet KL431K DatasheetKL431K Datasheet (PDF)

SMD Type Adjustable Accurate Reference Source TL431K (KL431K) IC ■ Features ● The output voltage can be adjusted to 36V ● Low dynamic output impedance, its typical value is 0.2Ω ● Trapping current capability is 1 to 100mA ● Low output noise voltage ● Fast on -state response CATHODE ANODE ANODE NC 1 2 3 4 8 REF 7 ANODE 6 ANODE 5 NC NC − No internal connection ■ Absolute Maximum Ratings Ta = 25℃ Parameter Cathode Voltage Cathode Current Range(Continuous) Reference Input Current Range M.

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SMD Type Adjustable Accurate Reference Source TL431K (KL431K) IC ■ Features ● The output voltage can be adjusted to 36V ● Low dynamic output impedance, its typical value is 0.2Ω ● Trapping current capability is 1 to 100mA ● Low output noise voltage ● Fast on -state response CATHODE ANODE ANODE NC 1 2 3 4 8 REF 7 ANODE 6 ANODE 5 NC NC − No internal connection ■ Absolute Maximum Ratings Ta = 25℃ Parameter Cathode Voltage Cathode Current Range(Continuous) Reference Input Current Range Maximum Power Dissipation Thermal Resistance from Juntion to Ambient Operating Junction Temperature Operating Junction Temperature Range Storage Temperature Range Symbol VKA IKA Iref PD RθJA Tj Topr Tstg +0.040.21 -0.02 SOP-8 Rating 37 -100~+150 0.05~+10 400 270 150 0 ~ 70 -65 ~ 150 1.50 0.15 1 CATHODE 2 ANODE 3 ANODE 4 NC 5 NC 6 ANODE 7 ANODE 8 REF Unit V mA mW ℃/W ℃ ■ Electrical Characteristics Ta = 25℃(unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit VKA=VREF,IKA=10mA 2.445 2.545 Reference Input Voltage(Fig.1) Vref RanK 0.5% 1% 2.482 2.495 2.508 2.47 2.52 V Deviation of Reference Input Voltage Over Temperature(Fig.1) Tmin=0℃ ,Tmax=+70℃ VKA=VREF,IKA=10mA △Vref/△T Tmin≤Ta≤Tmax 4.5 17 mV Ratio Of Change in Reference lnput Voltage to the Change in Cathode Voltage (Fig.2) △Vref/△VKA IKA=10mA △VKA=VREF ~ 10V △VKA=10V ~ 36V -1.0 -2.7 mV/V -0.5 -2.0 Reference Input Current Iref IKA=10mA,R1=10 kΩ,R2=∞ 1.5 4 Deviation Of Reference Input Current Over Full Temperature Range(Fig.2) Iref / △T IKA=10mA,R1=10 kΩ,R2=∞ Ta=full Temperature uA 0.4 1.2 Minmum Cathode Current for Regulation(Fig.1) IKA(min) VKA=VREF 0.45 1.0 mA Off-state Cathode Current(Fig.3) IKA(OFF) VKA=40V, VREF=0 0.05 0.5 uA Dynamic Impedance ZKA VKA=VREF, IKA=1 to 100mA,f≤1.0KHz 0.15 0.5 Ω ■ Marking Marking 431 www.kexin.com.cn 1 SMD Type Adjustable Accurate Reference Source TL431K (KL431K) IC ■ Typical Characterisitics Cathode Current versus Cathode Voltage 150 IK, CATHODE CURRENT (mA) 100 50 0 -50 -100 -2 800 VKA=Vref Ta=25℃ -1 0 1 2 VKA, CATHODE VOLTAGE (V) 3 Cathode Current versus Cathode Voltage KA KA IK, CATHODE CURRENT (uA) 600 I400 KA(min) 200 ref 0 -200 -1 2600 012 VKA, CATHODE VOLTAGE (V) VKA=Vref Ta=25℃ 3 Reference Input Voltage versus Ambient Temperature Test Circuit for VKA=Vref Vref, REFERENCE INPUT VOLTAGE (mV) 2550 2500 2450 2400 2350 -40 VKA=Vref IK=10mA -20 0 20 40 60 80 Ta, AMBIENT TEMPERATURE (℃) 100 2 www.kexin.com.cn SMD Type Adjustable Accurate Reference Source TL431K (KL431K) ■ Typical Characterisitics Change in Reference Input Voltage versus Cathode Voltage 0 -4 IK=10mA Ta=25℃ IC △Vref, REFERENCE INPUT VOLTAGE (mV) -8 -12 -16 Iref, REFERENCE INPUT CURRENT (uA) -20 0 5 10 15 20 25 30 35 40 VKA, CATHODE VOLTAGE (V) Reference Input Current versus Ambient Temperature 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -40 -20 0 20 40 60 Ta, AMBIENT TEMPERATURE (℃) IK=10mA R1=10KΩ 80 100 Off-State Cathode Current versus Ambient Temperature 40 Test Circuit for VKA=Vref(1+R1/R2)+R1*Iref Test Circuit for Iref Ioff, OFF-STATE CATHODE CURRENT (nA) 30 20 10 0 -40 -20 0 20 40 60 Ta, AMBIENT TEMPERATURE (℃) VKA=36V Vref=0V 80 100 Test Circuit for Ioff www.kexin.com.cn 3 .


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