TL432K Adjustable Shunt Regulator Elektronische Bauelemente RoHS Compliant Product SC-59 DESCRIPTION The TL432K series are three-terminal adjustable regulators with guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between VREF (approximately 1.24V) and 20V with two extermal S resistors. Theses devices have an output impedance of 0.2 . In many applications, these devices make excellently improved Zener diode replacements due to their active output circuitry that provide very sharp turn-on characteristics. Due to their precise +/- 2% referencing voltage tolerance, it is possible in many applications to avoide the use of variable resistors. This may consequently save cost and eliminate associated drifting and reliability problems. A L 2 3 Top View B 1 D G J C K H Dim Min Max A 2.70 3.10 B 1.40 1.60 C 1.00 1.30 D 0.35 0.50 G 1.70 2.10 H 0.00 0.10 J 0.10 0.26 K 0.20 0.60 L 0.85 1.15 S 2.40 2.80 All Dimension in mm FEATURES Sink current capability: 200 mA. Minimum cathode current for regulation: 150 mA. Equivalent full-range temp coefficient: 30 ppm/ C. Fast turn-on response. Low dynamic output impedance: 0.2 . Programmable output voltage to 20V Low output noise. PRECISION REFERENCE VOLTAGE Rank A B C Reference Voltage 1.24 ± 0.5% 1.24 ± 1% 1.24 ± 2% TYPICAL APPLICATION CIRCUIT BLOCK DIAGRAM http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A SYMBOL Any changing of specification will not be informed individual Page 1 of 5 TL432K Adjustable Shunt Regulator Elektronische Bauelemente ABSOLUTE MAXIMUM RATINGS Parameter Supply Voltage Differential Input Voltage Input Voltage Power Dissipation Opearting, Storage Temperature Symbol Value Units VKA IKA IREF PD TJ, TSTG 20 -10 ~ +250 -0.05 ~ +10 225 150, -65~150 V mA mA mW °C ELECTRICAL CHARACTERISTICS (VCC=5V, All voltage referenced to GND unless otherwise specified) Parameter Test Conditions Min VREF VKA = VREF, IK = -10mA (Fig. 1) ΔVREF /ΔT 1.215 1.228 1.234 Ta = Full Range (Fig. 1) Symbol Referencet Voltage TL432KC TL432KB TL432KA Deviation of reference input voltage over temperature (note 1) Ratio of Change in reference input voltage to the change in cathode voltage Reference Input Current Deviation of reference input current over temperature range Minimum cathode current for regulation Off-State Cathode Current Dynamic Output Inpedance (note 2) ΔVREF /ΔVKA IREF IREF VKA = VREF, IK = -10mA, IK = -10 mA ΔVKA = (Fig. 2) 20V~VREF IK = 10mA, R1 = 10K , R2 = (Fig.2) IK = 10mA, R1 = 10 KW, R2 = (Fig. 2) Typ Max Units 1.24 1.265 1.252 1.246 V 3.0 20 mV -1.4 -2.0 1.4 3.5 A 0.4 1.2 A mV /V IKA(min) VKA = VREF (Fig. 1) 0.15 0.3 mA IKA(off) VKA = 20V, VREF = 0 (Fig.3) 0.1 1.0 A VKA = VREF , IK = 1 ~ 100 mA 0.2 0.5 |ZkA| F ≦ 1.0 KHz (Fig. 1) Note 1. Deviation of reference input voltage, VDEV, is defined as the maximum variatio of the reference over the full temperature range. The average temperature coefficient of the reference input voltage α VREF is defined as: Where: T2-T1 = full temperature change. α VREF can be positive or negative depending on whether the slope is positive or negative. Note 2. The dynamic output impedance, RZ, is defined as: http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 2 of 5 TL432K Elektronische Bauelemente Adjustable Shunt Regulator When the device is programmed with two external resistors R1 and R2 (see figure 2.), the dynamic output impedance of the overall circuit, is defined as: TEST CIRCUITS TYPICAL PERFORMANCE CHARACTERISTICS http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 3 of 5 TL432K Elektronische Bauelemente http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Adjustable Shunt Regulator Any changing of specification will not be informed individual Page 4 of 5 TL432K Elektronische Bauelemente Adjustable Shunt Regulator APPLICATION EXAMPLES http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 5 of 5