AX431AN

Page No. : 1/7 AX431 Series Adjustable Shunt Regulator AX431 Series Pin Assignment 3 2 3-Lead Plastic SOT-23 Package Code: N Pin 1: Reference Pin 2: Cathode Pin 3: Anode 3-Lead Plastic SOT-89 Package Code: M Pin 1: Reference Pin 2: Anode Pin 3: Cathode 3-Lead Plastic TO-92 Package Code: A Pin 1: Reference Pin 2: Anode Pin 3: Cathode Description The AX431 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 1 2 3 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 12 8 • 1 2 3 3 Ordering Information Package SOT-23 SOT-89 TO-92 SO-8 VREF: 2.495±2% AX431AN AX431AM AX431AA AX431AS VREF: 2.495±1% AX431BN AX431BM AX431BA AX431BS 4 3-Lead Plastic SO-8 Package Code: S 7 6 Pin 1: Cathode 5 Pin 2/3/6/7: Anode Pin 4/5: NC Pin 8: Reference VREF: 2.495±0.5% AX431CN AX431CM AX431CA AX431CS 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 SOT-89 TO-92 SO-8 Operating Temperature Range Storage Temperature Range Topr Tstg 0~+70 -65~+150 280 770 770 770 o o Unit V mA mA mW C C Operating Conditions Characteristics Cathode Voltage Cathode Current Range (Continuous) Symbol VKA IK Min. VREF 1 Max. 36 100 Unit V mA AVANTICS - AX431 Series Specification No.: 050308-FE0001 Page No. : 2/7 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) AX431AN/AM/AA/AS AX431BN/BM/BA/BS AX431CN/CM/CA/CS Symbol VREF VREF(dev) ∆VREF / ∆VK IREF IREF(dev) IK(min) IK(off) ZK Test Conditions VK=VREF, IK=10mA VK=VREF, IK=10mA Tmin≤Ta≤Tmax IK=10mA, ∆VK=10V to VREF IK=10mA, ∆VK=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 2.445 2.470 2.483 Typ 2.495 2.495 2.495 4 -1.4 -1.0 2 0.4 0.4 0.1 0.2 Max 2.545 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 OverTemperature (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) AVANTICS - AX431 Series Specification No.: 050308-FE0001 Page No. : 3/7 Characteristics Curve Cathode Current & Cathode Voltage 150 125 Change in Reference Input Voltage (mV) 100 Cathode Current (mA) 75 50 25 0 -25 -50 -75 -100 -2 -1 0 1 Cathode Voltage (V) 2 3 VK=VREF, Ta=25 C Test Circuit (Fig1) o Change in Reference Input Voltage & Cathode Voltage 5 0 -5 -10 -15 -20 -25 -30 -35 -40 0 10 20 30 Cathode Voltage (V) 40 50 IK=10mA, Ta=25 C Test Circuits (Fig2) o Reference Input Voltage & Temperature 2.58 2.56 Reference Input Voltage (V) 2.54 2.52 2.50 2.48 2.46 2.44 2.42 2.40 -40 -20 0 20 40 o Cathode Current & Cathode Voltage 1000 800 600 400 200 0 -200 -400 -2 -1 0 1 Cathode Voltage (V) 2 3 o VK=VREF, IK=10mA Test Circuit (Fig1) 60 80 100 120 Cathode Current (uA) VK=VREF, Ta=25 C Test Circuit (Fig1) Temperature ( C) Small Signal Voltage Amplification & Frequency 60 50 Voltage Amplification (dB) 40 30 Vout 20 10 0 -10 1000 + 10uF 15K Ik 240 8.2K GND 10000 100000 Frequency (Hz) 1000000 10000000 AVANTICS - AX431 Series Specification No.: 050308-FE0001 Page No. : 4/7 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 Vout=(1+R1/R2)VREF Fig 6. Output Control of a Three-Terminal Fixed Regulator Fig 7. Series Pass Regulator Vcc IN AX7805 Vcc Vout R1 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 AVANTICS - AX431 Series Isink=VREF/RS Specification No.: 050308-FE0001 Page No. : 5/7 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 431 BS Pb Free Mark Pb-Free: " " (Note) Normal: None 3 1 2 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 V G *: Typical, Unit: mm C D H K J 3-Lead SOT-23 Plastic Surface Mounted Package AVANTICS Package Code: N SOT-89 Dimension C H Marking: Date Code AX4 3 1 Control Code Pb Free Mark Pb-Free: " . " (Note) Normal: None B D 1 E G A 2 3 I Note: Green label is used for pb-free packing 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 F J DIM A B C D E F G H I Min. 4.40 4.05 1.50 2.40 0.36 *1.50 *3.00 1.40 0.35 Max. 4.60 4.25 1.70 2.60 0.51 1.60 0.41 *: Typical, Unit: mm 3-Lead SOT-89 Plastic Surface Mounted Package AVANTICS Package Code: M AVANTICS - AX431 Series Specification No.: 050308-FE0001 Page No. : 6/7 TO-92 Dimension A B 1 2 3 α2 Marking: Pb Free Mark Pb-Free: " . " (Note) Normal: None AX 431 A 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 AVANTICS Package Code: A SO-8 Dimension A G Marking: Pb Free Mark Pb-Free: " . " (Note) A X Normal: None 8 B 7 6 5 C 4 J H I S 431 Control Code Pin 1 Mark Date Code Pin1 Index 2 3 Note: Green label is used for pb-free packing Pin Style: 1.Cathode 2/3/6/7.Anode 4/5.NC 8.Reference D E Part A K L N O Part A 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 M DIM A B C D E F G H I J K L M N O Min. 4.85 3.85 5.80 1.22 0.37 3.74 1.45 4.80 0.05 0.30 0.19 0.37 0.23 0.08 0.00 Max. 5.10 3.95 6.20 1.32 0.47 3.88 1.65 5.10 0.20 0.70 0.25 0.52 0.28 0.13 0.15 *: Typical, Unit: mm F 8-Lead SO-8 Plastic Surface Mounted Package AVANTICS Package Code: S Important Notice: • All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of AVANTIC. • AVANTICS reserves the right to make changes to its products without notice. • AVANTICS semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems. • AVANTICS assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. Head Office: • AVANTICS Microelectronics Corp: No. 255, Cai Lun Rd. Zhangjiang Technology Industrial Park Pudong, Shanghai, China Tel: 86-021-58955599 Fax: 86-021-58558038 AVANTICS - AX431 Series Specification No.: 050308-FE0001 Page No. : 7/7 Soldering Methods for AVANTICS’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