<Linear IC> RT9H321C Adjustable Precision Shunt Regulator PIN CONFIGURATION ［UNIT：mm］ The RT9H321C is adjustable shunt regulator, which provides a highly accurate 1.0%. Output voltage can be set to any value between VREF and 36V with two external resistors. 1.1 ● Reference voltage : VREF=1.250V±1%(Ta=25℃) ● Adjustable output voltage : VREF to 36V ● Low output impedance : |ZKA|=0.25Ω(Typ.) ● Small package : SC-59 0.33 ② ③ 0∼0.1 APPLICATION 0.5 ① 0.8 2.9 1.90 0.95 0.95 FEATURE 2.5 1.5 0.5 0.16 DESCRIPTION ●Source of reference voltage, such as a general electric device ●Secondary side control of a switching power supply Outline : SC-59 ①Reference voltage(VREF) ②Cathode(K) ③Anode(A) BLOCK DIAGRAM K VREF 1.25V A 110518 1 <Linear IC> RT9H321C Adjustable Precision Shunt Regulator ABSOLUTE MAXIMUM RATINGS ( Ta=25℃, unless otherwise noted ) Symbol Parameter VKA Cathode voltage IK Cathode current IREF Reference input current Tj0PT Operating junction temperature ( Non condensing ) TSTG Storage temperature Pd Power dissipation Ratings 37 -80∼80 -0.05∼10 -40∼+150 -55∼＋150 200 Unit V mA mA ℃ ℃ mW RECOMMENDED OPERATING CONDITIONS ( Ta=25℃, unless otherwise noted ) Limits Symbol Parameter Unit Min. Max. VKA Cathode voltage VREF 36 Ｖ Cathode current 0.2 80 mA ＩＫ ELECTRICAL CHARACTERISTICS ( Ta=25℃, unless otherwise noted ) Symbol VREF Parameter Test condition Min. 1.237 Limits Typ. Max. 1.250 1.236 Unit Ｖ Reference voltage VKA=VREF，IK=1mA ⊿ＶＲＥＦ/⊿Ｔａ Deviation of reference input voltage over temperature VKA=VREF，IK=1mA，Ta=-20∼85℃ - - Ratio of VREF change in cathode voltage change ⊿VKA=VREF∼5V，IK=1mA -2.7 -1.4 - mV/V ⊿ＶＲＥＦ/⊿VK ⊿VKA=5V∼36V，IK=1mA -2 -1 - mV/V 30 mV Reference input current IK=10mA,R1=10K，R2=∞ - 0.2 0.5 uA Deviation of reference input current over temperature IK=10mA,R1=10K，R2=∞, Ta=-20∼85℃ - 0.1 0.5 uA Ikmin Minimum cathode current for regulation VKA=VREF - 0.08 0.20 mA IOFF Off-state cathode current VKA=28V，VREF=0V - 0.1 1.0 uA |ZKA| Dynamic impedance VKA=VREF,IK=0.5∼80mA，f<1.0KHz - 0.25 0.50 Ω IREF ⊿ＩＲＥＦ/⊿Ta 110518 2 <Linear IC> RT9H321C Adjustable Precision Shunt Regulator PARAMETER MEASUREMENT INFORMATION (1)VKA=VREF (2)VKA＞VREF VO=VKA VIN VO=VKA VIN K R1 IRE A R2 VRE VREF K A VO=(1+R1/R2)・ (3)IOFF VO=VKA VIN K VREF A 110518 3 6-41 Tsukuba, Isahaya, Nagasaki, 854-0065 Japan Keep safety first in your circuit designs! ·ISAHAYA Electronics Corporation puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. 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