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| Semiconductor SL432xSF Programmable Voltage Reference Description The SL432 series are 3-terminal precision shunt regulators that are programmable over a wide voltage range of 1.24V to 16V with 1.0%, 2.0% tolerance. The SL432 series have a low dynamic impedance of 0.25. These features make the SL432 series an excellent replacement for zener diodes in numerous applications circuits that require a precision reference voltage. Features * Programmable output voltage from 1.24V to 16V * Voltage reference tolerance : 1.0%, 2.0% * Sink current capability of 80 to 30 Ordering Information Type NO. SL432xSF Marking 42 : Grade => 3:2% , A:1% Package Code SOT-23F Outline Dimensions ( Unit : mm ) 2.30~2.50 1.50~1.70 Symbol 1 2.80~3.00 1.90 Typ. 3 0.45 Max. Functional block diagram Cathode(K) 2 Reference(R) + - 0.80~1.00 VREF =1.24V Anode(A) 0.10 Max. PIN Connections 1. Reference 2. Cathode 3. Anode 0.20 Max. KSI-2015-005 1 SL432xSF Absolute maximum ratings Characteristic Cathode to Anode voltage Cathode Current Reference Input Current Power Dissipation Junction Temperature Operating Temperature Range Storage Temperature Range [Ta=25] Symbol VKA IK Iref PD* TJ Topr Tstg Rating 18 30 3 350 150 -40 ~ +85 -55 ~ +150 Unit V mA mA mW * With PCB(8x8mm copper area) at glass epoxy board(t=1.7mm, area : 20x20mm) Recommended operating conditions Characteristic Cathode voltage Cathode current Symbol VKA IK Rating Min. Vref 0.1 Max. 16 30 Unit V mA Electrical Characteristics (Ta=25, unless otherwise noted.) Characteristic Reference voltage (Fig.1) Reference input voltage deviation over temperature (Fig.1, Note1,2) Ratio of delta reference input voltage to delta cathode voltage (Fig.2) Reference current (Fig,2) Reference input current deviation over temperature (Fig.2, Note 1,2) Minimum cathode current for Regulation Off-state cathode current (Fig.3) Dynamic impedance (Fig.1, Note3) Symbol Vref Vref Vref VKA Iref Iref IK(MIN) IK(off) ZKA Condition VKA=Vref, IK=10mA VKA=Vref, IK=10mA @ -40C Ta 85C IK=10mA Vref VKA 16V IK=10mA R1=10K, R2= IK=10mA R1=10K, R2= VKA=Vref VKA=16V, Vref=0V VKA=Vref, f 1.0KHz 0.1mA IK 30mA SL432ASF SL432SF Min. 1.228 1.215 - Typ. 1.240 Max. 1.252 1.265 20 -2.7 0.3 0.08 80 50 0.4 Unit V 10 -1.0 0.15 0.04 55 5 0.25 mV mV/V nA KSI-2015-005 2 SL432xSF Fig. 1 Test circuit for VKA=Vref Fig. 2 Test circuit for VKA>Vref Fig. 3 Test circuit for IK(off) Input IK VKA Input R1 R2 Vref IK Iref VKA Input VKA IK(off) V ref = V ref x (1 + R1 ) + I ref x R 1 R2 Note. 1. Ambient temperature range: TLOW = -40, THigh = 85 2. The deviation parameters Vref and Iref are defined as the difference between the maximum value and minimum value obtained over the full operating ambient temperature range that applied. Vref = Vref Max - Vref Min Ta = T2 - T1 Ambient Temperature The average temperature coefficient of the reference input voltage, Vref is defined as: V ref x 10 6 ) ppm V ref (Ta = 25) )= V ref ( Ta ( Vref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature, refer to Fig. 8 Example : Vref = 10mV and the slope is positive, Vref @ 25 = 1.24V Ta = 125 0.010 ( ) x 10 6 ppm 1.241 = 65ppm / Vref ( )= 125 3. The dynamic impedance ZKA is defined as: KA = VKA I K When the device is operating with two external resistors, R1 and R2, (refer to Fig.2) the total dynamic impedance of the circuit is given by: KA ' = KA x (1 + R1 ) R2 KSI-2015-005 3 SL432xSF Electrical Characteristics Curves (Continue) Fig.4 IK vs VKA (1) 30 Fig.5 IK vs VKA (2) 300 VKA=Vref Cathode current IK [mA] 20 Ta=25C Cathode current IKA [A] 250 200 150 100 50 VKA=Vref Ta=25C 10 0 0 -10 -10 -1 -0.5 0 0.5 1.0 1.5 2.0 -50 -1 -0.5 0 0.5 1.0 1.5 2.0 Cathode Voltage VKA [V] Fig.6 I K(off vs VKA cathode voltage Vref /VKA [mV/V] 4 Cathode Voltage VKA [V] Fig.7 Vref/VKA vs Ta Ratio of delta reference input voltage to delta 0.0 -0.1 Off-state cathode current IK(off) [A] VKA=16V, Vref=0V Ta=25C VKA=Vref - 16V IK=10mA 3 -0.2 2 -0.3 I 1 -0.4 0 0 4 8 12 16 20 -0.5 -50 -25 0 25 50 75 100 Cathode Voltage VKA [V] Fig.8 Vref vs Ta 1.30 Ambient Temperature Ta [C] Fig.9 PD vs Ta 500 Reference input voltage Vref [V] VKA=Vref , IK=10mA 1.28 Power dissipation PD [mW] Vref(max) 1.26 400 300 1.24 Vref(typ) Vref(min) 200 1.22 100 0 1.20 -50 -25 0 25 50 75 100 0 25 50 75 100 125 150 Ambient Temperature Ta [C] Ambient Temperature Ta [C] KSI-2015-005 4 SL432xSF Electrical Characteristics Curves Fig.10 Stability Boundary Conditions 30 Output Ta=25C Cathode current IK [mA] R1 IK CL 20 R2 Stable 10 GND 0 Unstable Regions A B 0.01 0.1 1 10 VKA Vref 10V R1 [K] 0 10 R2 [K] 1.415 A, B A 0 0.001 Load capacitance CL [F] Fig.11 Test circuit for Fig. 10 The AUK Corp. products are intended for the use as components in general electronic equipment (Office and communication equipment, measuring equipment, home appliance, etc.). Please make sure that you consult with us before you use these AUK Corp. products in equipments which require high quality and / or reliability, and in equipments which could have major impact to the welfare of human life(atomic energy control, airplane, spaceship, transportation, combustion control, all types of safety device, etc.). AUK Corp. cannot accept liability to any damage which may occur in case these AUK Corp. products were used in the mentioned equipments without prior consultation with AUK Corp.. Specifications mentioned in this publication are subject to change without notice. KSI-2015-005 5 |
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