Description The ET431 is a three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between Vref (approximately 2.5 volts) and 36 volts with two external resistors. The devices have a typical dynamic output impedance of 0.2 . Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacement for zener diodes in many applications. The ET431 is characterized for operation from -0 ℃to +70℃ Features A Programmable Output Voltage to 36V Low Dynamic Output Impedance 0.2 Sink Current Capability of 0.1 mA to 100 mA Equivalent Full-Range Temperature Coefficient of ET431 ET431 50 ppm/oC Temperature Compensated for Operation over Full Rated Operating Temperature Range Low Output Noise Fast Turn on R R A K TO –92 K SOT –23 Package FUNCTIONAL BLOCK DIAGRAM SYM BOL Cathode Reference Cathode Reference Anode Anode BEIJING ESTEK ELECTRONICS CO.,LTD 1 Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified) Characteristic Symbol Value Unit Cathode Voltage Cathode Current Range (Continuous) VKA IK 36 -100 ~ 150 V mA Reference Input Current Range IREF 0.05 ~ 10 mA o Power Dissipation at 25 C: TO –92 Package SOT –23 –3 Package o C/W) Junction Temperature Range Operating Temperature Range TJ Tg Storage Temperature Range Tstg PD 0.7 0.2 W W o 0 ~ 150 o C C o C 0 ~ 70 -65 ~ +150 Electrical Characteristics (Ta = 25oC, VKA = VREF, IK = 10mA) Characteristic Reference Input Voltage Symbol Test Condition Min Typ Max Unit VREF 0.5% 1.0% 2.483 2.470 2.495 2.507 2.520 V 3 17 mV mV/V Deviation of Reference Input Voltage Over Full Temperature Range VREF(de v) Ratio of Change in Reference Input Voltage to the Change in Cathode Voltage V R EF VKA Tmin≤ Ta≤Tmax ﾣ VKA = 10V-VREF -1.4 -2.7 VKA = 36V- 10V -1.0 -2.0 IREF R1 = 10K, R2 =∞ ﾣ 1.8 4 A Deviation of Reference Input Current Over Full Temperature Range IREF(dev) R1 = 10K, R2 = ∞ﾣ 0.4 1.2 A Minimum Cathode Current for Regulation IK(min) 0.25 0.5 mA 0.26 0.22 1.0 0.5 A ohm Reference Input Current Off-State Cathode Current Dynamic Impedance IK(off) ZKA IK = 1 VKA = 36V, VREF = 0 mA to 100 mA , f ,ﾣ 1.0KHz BEIJING ESTEK ELECTRONICS CO.,LTD 2 TEST CIRCUITS Ordering Information OR DERI NG NU MB ER 431 Address : P ACK AGE TO-92 / SOT-23 M ARKI NG ET431 / 431 6A06--6A07 Rm 6A07,Changyin Office Building ,No.88,Yong Ding Road,Hai Dian District ,Beijing Postalcode:100039 Tel: 86-010-58895780 / 81 / 82 / 83 / 84 Fax : 010-58895793 Http://www.estek.com.cn Email:[email protected] REV No:01-060807 BEIJING ESTEK ELECTRONICS CO.,LTD 3