RL431BA

Page No. : 1/1 RL431 Series Adjustable Shunt Regulator RL431 Series Pin Assignment 3 2 3-Lead Plastic SOT-23 Package Code: N Pin 1: Reference Pin 2: Cathode Pin 3: Anode Description The RL431 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 2.495 volts) and 36 volts with two external resistors. These devices have a typical dynamic output impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent replacement for zener diodes in many applications. 1 12 3 3-Lead Plastic TO-92 Package Code: A Pin 1: Reference Pin 2: Anode Pin 3: Cathode Features • Programmable output voltage • Temperature coefficient is 50ppm/oC typical • Temperature compensated for operation over full temperature range • Low output noise voltage • Fast turn on response Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified) Characteristics Cathode Voltage Cathode Current Range (Continuous) Reference Input Current Range Symbol VKA IK IREF Value 36 -100~+150 0.05~+10 SOT-23 Power Dissipation PD TO-92 Operating Temperature Range (Max.) Storage Temperature Range *. RL431CN, RL431CA Topr Tstg -40~+120 * -65~+150 770 o o Unit V mA mA 280 mW C C Operating Conditions Characteristics Cathode Voltage Cathode Current Range (Continuous) Symbol VKA IK Min. VREF 1 Max. 36 100 Unit V mA DS-RS431L-01 October, 2006 www.Orister.com Page No. : 2/2 Functional Block Diagram & Symbol Functional Block Diagram Symbol Cathode Reference VREF + - Cathode Reference Anode Anode Test Circuits Fig 1. VK=VREF IN IREF IK VREF R2 VREF II VK Fig 2. VK>VREF IN R1 II VK IREF IK IOFF Fig 3. Off-State Current IN VK Note: VK=VREF(1+R1/R2)+IREFxR1 Electrical Characteristics (TA=25oC unless otherwise specified) Characteristics Reference Input Voltage (Fig1) RL431BN/BA (1.0%) RL431CN/CA (0.5%) Symbol VREF VREF(dev) ΔVREF / ΔVK IREF IREF(dev) IK(min) IK(off) ZK Test Conditions VK=VREF, IK=10mA VK=VREF, IK=10mA Tmin≤Ta≤Tmax IK=10mA, ΔVK=10V to VREF IK=10mA, ΔVK=36V to 10V IK=10mA, R1=10kΩ, R2=∞ IK=10mA, R1=10kΩ, R2=∞, Ta=Full Range VK=VREF VK=36V, VREF=0 VK=VREF, f≤1kHz IK=1 to 100mA Min 2.470 2.483 Typ 2.495 2.495 4 -1.4 -1.0 2 0.4 0.4 0.1 0.2 Max 2.520 2.507 17 -2.7 -2.0 4 1.2 1.0 1.0 0.5 Unit V mV mV/V mV/V uA uA mA uA Ω Deviation of Reference Input Voltage Over-Temperature (Fig1) Ratio of Change in Reference Input Voltage to the Change in Cathode Voltage (Fig2) Reference Input Current (Fig2) Deviation of Reference Input Current Over Full Temperature Range (Fig2) Minimum Cathode Current for Regulation (Fig1) Off-State Cathode Current (Fig3) Dynamic Output Impedance (Fig1) DS-RS431L-01 October, 2006 www.Orister.com Page No. : 3/3 Characteristics Curve Cathode Current & Cathode Voltage 150 125 Change in Reference Input Voltage (mV) 5 0 -5 -10 -15 -20 -25 -30 -35 -40 -2 -1 0 1 Cathode Voltage (V) 2 3 0 Change in Reference Input Voltage & Cathode Voltage 100 Cathode Current (mA) 75 50 25 0 -25 -50 -75 -100 VK=VREF, Ta=25 C Test Circuit (Fig1) o IK=10mA, Ta=25 C Test Circuits (Fig2) 10 20 30 Cathode Voltage (V) 40 50 o Reference Input Voltage & Temperature 2.58 2.56 Reference Input Voltage (V) 1000 800 600 400 200 0 -200 -400 -2 Cathode Current & Cathode Voltage 2.54 2.52 2.50 2.48 2.46 2.44 2.42 2.40 -40 -20 0 20 40 60 80 100 120 Temperature (oC) VK=VREF, IK=10mA Test Circuit (Fig1) Cathode Current (uA) VK=VREF, Ta=25oC Test Circuit (Fig1) -1 0 1 Cathode Voltage (V) 2 3 Small Signal Voltage Amplification & Frequency 60 50 Voltage Amplification (dB) 40 30 20 + 15K Ik Vout 240 10 0 -10 1000 10uF 8.2K GND 10000 100000 Frequency (Hz) 1000000 10000000 DS-RS431L-01 October, 2006 www.Orister.com Page No. : 4/4 Typical Application Fig 4. Shunt Regulator Fig 5. High Current Shunt Regulator Vcc R1 Vout Vcc R1 Vout R2 R2 Vout=(1+R1/R2)VREF Fig 6. Output Control of a Three-Terminal Fixed Regulator Vcc Vout R1 Vout=(1+R1/R2)VREF Fig 7. Series Pass Regulator Vcc IN AX7805 Vout R1 OUT COMMON R2 R2 Vout=(1+R1/R2)VREF; Vout(min)=VREF+5V Vout=(1+R1/R2)VREF; Vout(min)=VREF+VBE Fig 8. Current Limiter or Current Source Fig 9. Constant Current Sink Vcc Vcc RCL Iout Isink Rs Iout=VREF/RCL Isink=VREF/RS DS-RS431L-01 October, 2006 www.Orister.com Page No. : 5/5 SOT-23 Dimension Marking: DIM A B C D G H J K L S V Min. 2.80 1.20 0.89 0.30 1.70 0.013 0.085 0.32 0.85 2.10 0.25 Max. 3.04 1.60 1.30 0.50 2.30 0.10 0.177 0.67 1.15 2.75 0.65 A L 431L BS Note: Pb-free product can distinguish by the green label or the extra description on the right side of the label. Pin Style: 1.Reference 2.Cathode 3.Anode Material: • Lead solder plating: Sn60/Pb40 (Normal), Sn/3.0Ag/0.5Cu or Pure-Tin (Pb-free) • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 3 1 2 V G *: Typical, Unit: mm C D H K J 3-Lead SOT-23 Plastic Surface Mounted Package Package Code: N TO-92 Dimension α2 Marking: RS A 4 3 1L A B 1 2 3 α3 Date Code Control Code C Note: Green label is used for pb-free packing D Pin Style: 1.Reference 2.Anode 3.Cathode Material: • Lead solder plating: Sn60/Pb40 (Normal), Sn/3.0Ag/0.5Cu or Pure-Tin (Pb-free) • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 DIM A B C D E F G H I α1 α2 α3 Min. 4.33 4.33 12.70 0.36 3.36 0.36 - Max. 4.83 4.83 0.56 *1.27 3.76 0.56 *2.54 *1.27 *5° *2° *2° H I E F G *: Typical, Unit: mm α1 3-Lead TO-92 Plastic Package Package Code: A Ordering Information Package SOT-23 TO-92 VREF: 2.5±1% RL431BN RL431BA VREF: 2.5±0.5% RL431CN RL431CA DS-RS431L-01 October, 2006 www.Orister.com Page No. : 6/6 Soldering Methods for Orister’s Products 1. Storage environment: Temperature=10oC~35oC Humidity=65%±15% 2. Reflow soldering of surface-mount devices Figure 1: Temperature profile tP TP Ramp-up TL Tsmax Temperature tL Critical Zone TL to TP Tsmin tS Preheat Ramp-down 25 t 25oC to Peak Time Profile Feature Average ramp-up rate (TL to TP) Preheat - Temperature Min (Tsmin) - Temperature Max (Tsmax) - Time (min to max) (ts) Tsmax to TL - Ramp-up Rate Time maintained above: - Temperature (TL) - Time (tL) Peak Temperature (TP) Time within 5oC of actual Peak Temperature (tP) Ramp-down Rate Time 25oC to Peak Temperature 3. Flow (wave) soldering (solder dipping) Products Pb devices. Pb-Free devices. Sn-Pb Eutectic Assembly