PROGRAMMABLE PRECISION SHUNT REGULATOR TJR431A/C FEATURES Programmable Output Voltage to 28V Guaranteed 0.5% Reference Voltage Tolerance Cathode Current Range(Continuous) 100 mA Temperature Compensated For Operation Over Full Rate Operating Temperature Range Low Output Noise Voltage Fast Turn-on Response SOT-23 3L Package SOT-23 PKG 2 TOP 1 APPLICATION PIN 1. Cathode Shunt Regulator Precision High-Current Series Regulator High-Current Shunt Regulator Crowbar Circuit PWM Converter With Reference Voltage Monitor Precision Current Limiter 2. Anode 3 3. Reference ORDERING INFORMATION Device Package TJR431SF SOT-23 3L DESCRIPSION The TJR431 is a three-terminal adjustable shunt regulator with specified thermal stability over applicable temperature VREF and 28V with two external resistors. This device has a typical dynamic output impedance of 0.25Ω. Active output circuitry provides a very sharp turnon characteristic, making this device excellent replacement for zener diodes in many applications. The TJR431 is characterized for operation from -40℃ to +125℃. Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified) CHARACTERISTIC SYMBOL MIN. MAX. UNIT VKA - 37 V IK -100 150 mA Reference Input Current Range IREF -0.05 10 mA Junction Temperature Range TJR -40 150 ℃ Operating Temperature Range TOPR -40 125 ℃ Storage Temperature Range TSTG -65 150 ℃ Cathode Voltage Cathode Current Range(Continuous) Oct. 2014 – R0.1 -1- HTC PROGRAMMABLE PRECISION SHUNT REGULATOR TJR431A/C RECOMMENDED OPERATING CONDITIONS CHARACTERISTIC SYMBOL MIN. MAX. UNIT Cathode Voltage VKA VREF 28 V Cathode Current IK 1.0 100 mA Ordering Information VREF Package Tolerance Order No. Package Marking TJR431CSF - TJR431GCSF - TJR431ASF - TJR431GASF - 0.5% 2.495 Supplied As Reel SOT-23 1% Reel Ordering Information (continued) TJR 431 Package Type Tolerance Green Mode SF : SOT-23 C : 0.5% A : 1% G : Halogen Free Blank : Pb Free Root Name Product Code Oct. 2014 – R0.1 -2- HTC PROGRAMMABLE PRECISION SHUNT REGULATOR TJR431A/C PIN CONFIGURATION 2 TOP 1 3 SOT-23 PKG PIN DESCRIPTION TO-92 / SOT-23 / SOT-89 Pin No. Name Function 1 Cathode Input Supply Voltage 2 Anode Ground 3 Reference Reference Voltage TJR431 ELECTRICAL CHARACTERISTICS (TA=25℃, unless otherwise specified) CHARACTERISTIC SYMBOL TEST CONDITION TJR431C Reference Input Voltage VREF Ratio of Change in Reference Input Voltage to the Change in Cathode Voltage Reference Input Current Deviation of Reference Input Current ΔVREF/ΔT ΔVREF/ΔVKA TYP. MAX. 2.483 2.495 2.507 VKA =VREF, IK =10mA UNIT V TJR431A Deviation of Reference Input Voltage MIN. 2.470 VKA = VREF, IK =10mA TA =Full Range 2.495 2.520 mV 24 ΔVKA=10V to VREF -2.7 -1.0 ΔVKA=28V to 10V -2 -0.4 mV/V IK =10mA IREF IKA=10mA, R1=10㏀, R2=∞ 0.5 1.2 uA ΔIREF/ΔT IK =10mA, R1=10㏀, R2=∞ TA =Full Range 0.4 1.2 uA Minimum Cathode Current for Regulation IK(MIN) VKA= VREF 0.4 1.0 mA Off-State Cathode Current IK(OFF) VKA=28V, VREF=0 0.1 1.0 uA VKA= VREF, IK =1mA~100mA f ≤ 1kHz 0.25 0.50 Ω Dynamic Impedance Oct. 2014 – R0.1 ZKA -3- HTC PROGRAMMABLE PRECISION SHUNT REGULATOR TJR431A/C TEST CIRCUITS < Fig 2. Test circuit for VKA ≥ VREF > < Fig 1. Test circuit for VKA = VREF > < Fig 3. Test circuit for IKA(OFF) > Oct. 2014 – R0.1 -4- HTC