AN431
Document overview
- Manufacturer or author: Diodes Incorporated
- PDF pages: 13
Technical content
Features
Programmable Precise Output Voltage from 2.5V to 36V High Stability under Capacitive Load Low Temperature Deviation: 4.5mV Typical Low Equivalent Full -range Temperature Coefficient with 20PPM/oC Typical Low Dynamic Output Resistance: 0.15Ω Typical Sink Current Capacity from 1mA to 100mA Low Output Noise Wide Operating Range of -40 to +125oC Lead-Free Packages: SOT-23 Totally Lead-Free; RoHS Compliant (Notes 1 & 2) Lead-Free Packages, Available in “Green” Molding Compound: SOT-23 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) SOT-23
Applications
Charger Voltage Adapter Switching Power Supply Graphic Card Precision Voltage Reference Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen - and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. Typical Applications Circuit VIN VOUT VREF AN431 Shunt Regulator ANODE CATHODE REF VOUT=(1+R1/R2)*VREF
Document number: DS37414 Rev. 3 - 2 2 of 13 www.diodes.com April 2015 © Diodes Incorporated AN431 A Product Line of Diodes Incorporated Typical Applications Circuit (Cont.) VIN VOUT VREF AN431 High Current Shunt Regulator IOUTVIN AN431 Current Source or Current Limit AZ1117VIN VOUT Adjust 8.2K AN431 250 250 5V, 1A Precision 5V 1A Regulator VOUT=(1+R2/R3)*VREF IOUT=VREF/R2+IKA
Document number: DS37414 Rev. 3 - 2 3 of 13 www.diodes.com April 2015 © Diodes Incorporated AN431 A Product Line of Diodes Incorporated Typical Applications Circuit (Cont.) PWM Controller R2 680 PS521 R3 R4 VOUT AN431 COMP VFB PWM Converter with Reference Functional Block Diagram REF VREF CATHODE ANODE
Document number: DS37414 Rev. 3 - 2 4 of 13 www.diodes.com April 2015 © Diodes Incorporated AN431 A Product Line of Diodes Incorporated Absolute Maximum Ratings (Note 4) Symbol Parameter Rating Unit VKA Cathode Voltage 40 V IKA Cathode Current Range (Continuous) -100 to 150 mA IREF Reference Input Current Range 10 mA PD Power Dissipation 370 mW TJ Junction Temperature +150 ºC TSTG Storage Temperature Range -65 to +150 ºC ESD ESD (Human Body Model) 2000 V Note 4: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stres s ratings only, and functional operation of the device at these or any other conditions beyond those in dicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Symbol Parameter Min Max Unit VKA Cathode Voltage VREF 36 V IKA Cathode Current 1.0 100 mA TA Operating Ambient Temperature Range -40 +125 ºC
Document number: DS37414 Rev. 3 - 2 5 of 13 www.diodes.com April 2015 © Diodes Incorporated AN431 A Product Line of Diodes Incorporated Electrical Characteristics (@TA=+25º C, unless otherwise specified.) Symbol Parameter Test Circuit Conditions Min Typ Max Unit VREF Reference Voltage 0.5%
4 VKA=VREF, IKA=10mA
2.487 2.500 2.512 V 1.0% 2.475 2.500 2.525 ∆VREF Deviation of Reference Voltage Over Full Temperature Range 4 VKA=VREF, IKA=10mA 0 to +70oC – 4.5 8 mV -40 to +85oC – 4.5 10 -40 to +125oC – 4.5 16 ∆VREF ∆VKA Ratio of Change in Reference Voltage to the Change in Cathode Voltage
5 IKA=10mA
∆VKA=10V to VREF -1.0 -2.7 mV/V ∆VKA=36V to 10V -0.5 -2.0 IREF Reference Current 5 IKA=10mA, R1=10KΩ, R2=∞ – 0.7 4 µA ∆IREF Deviation of Reference Current Over Full Temperature Range 5 IKA=10mA, R1=10KΩ, R2=∞, TA=-40 to +125oC – 0.4 1.2 µA IKA (Min) Minimum Cathode Current for Regulation 4 VKA=VREF – 0.4 1.0 mA IKA (Off) Off-state Cathode Current 6 VKA=36V, VREF=0 – 0.05 1.0 µA ZKA Dynamic Impedance 4 VKA=VREF, IKA=1 to 100mA, f≤1.0kHz – 0.15 0.5 Ω θJC Thermal Resistance – SOT-23 – 135 – ºC/W
Document number: DS37414 Rev. 3 - 2 6 of 13 www.diodes.com April 2015 © Diodes Incorporated AN431 A Product Line of Diodes Incorporated Electrical Characteristics (Cont.) VIN VKA IKA VREF Test Circuit 4 for VKA=VREF VIN VKA IKA VREF VKA=VREF*(1+R1/R2)+ IREF*R1 IREF Test Circuit 5 for VKA>VREF IOFF VIN VKA Test Circuit 6 for IOFF
Document number: DS37414 Rev. 3 - 2 7 of 13 www.diodes.com April 2015 © Diodes Incorporated AN431 A Product Line of Diodes Incorporated Performance Characteristics Reference Voltage vs. Ambient Temperature Reference Current vs. Ambient Temperature Cathode Current vs. Cathode Voltage Cathode Current vs. Cathode Voltage Off-state Cathode Current Ratio of Delta Reference Voltage to the vs. Ambient Temperature Ratio of Delta Cathode Voltage -60 -40 -20 0 20 40 60 80 100 120 140 2.485 2.490 2.495 2.500 2.505 2.510 Reference Voltage (V) Ambient Temperature ( o VKA=VREF IKA=10mA -60 -40 -20 0 20 40 60 80 100 120 140 0.0 0.5 1.0 1.5 R1=10K,R2= IKA=10mA Reference Current (A) Ambient Temperature ( -2 -1 0 1 2 3 -100 -50 100 150 Cathode Current (mA) Cathode Voltage (V) VKA=VREF TA=25 C -200 200 400 600 800 Cathode Current (A) Cathode Voltage (V) VKA=VREF TA=25 C -40 -20 0 20 40 60 80 100 120 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 Off-state Cathode Current (A) Ambient Temperature ( o VKA=36V VREF=0 -40 -20 0 20 40 60 80 100 120 -1.4 -1.3 -1.2 -1.1 -1.0 -0.9 VKA=3.5V to 36V VREF / VKA (mV/V) Ambient Temperature ( o
Document number: DS37414 Rev. 3 - 2 8 of 13 www.diodes.com April 2015 © Diodes Incorporated AN431 A Product Line of Diodes Incorporated Performance Characteristics (Cont.) Small Signal Voltage Gain vs. Frequency Reference Impedance vs. Frequency Stability Boundary Conditions vs. Load Capacitance 1k 10k 100k 1M -10 Voltage Gain (dB) Small Signal Frequency (Hz) TA=25 C IKA=10mA 10F 8.2K 15K I KA Output 242 GND 1K 10K 100K 1,000K 0.1 Reference Impedance () Frequency (Hz) IKA=10mA TA=25 o C GND Output IKA IKA R1 (10K) 150 1E-3 0.01 0.1 1 10 100 100 STABLE STABLE Cathode Current (mA) Load Capacitance (F) VKA = VREF VKA = 5V VKA = 10V VKA = 15V: No Oscillation
Document number: DS37414 Rev. 3 - 2 9 of 13 www.diodes.com April 2015 © Diodes Incorporated AN431 A Product Line of Diodes Incorporated Performance Characteristics (Cont.) Pulse Response of Input and Output Voltage 0 2 4 6 Input Input and Output Voltage (V) Time (S) Output Pulse Generator f=100KHz 220 Output GND
Document number: DS37414 Rev. 3 - 2 10 of 13 www.diodes.com April 2015 © Diodes Incorporated AN431 A Product Line of Diodes Incorporated
Ordering Information
AN431 X X – X XX XX PackingPackage TR : Tape & Reel Product Name N : SOT-23 G1 : Green Condition Product Version A : 0.5% A : AN431 (40V) E1/G1 E1 : Lead Free B : 1.0% Marking Information (Top View) Package Temperature Range Condition Part Number Marking ID Packing Lead Free Green Lead Free Green SOT-23 -40 to +125C 0.5% AN431AN- ATRE1 AN431AN- ATRG1 EB1 GB1 3000/ Tape & Reel 1.0% AN431BN- ATRE1 AN431BN- ATRG1 EB2 GB2 3000/ Tape & Reel XXX : Logo XXX : Marking ID (See Ordering Information) Pb Lead-Free
Document number: DS37414 Rev. 3 - 2 11 of 13 www.diodes.com April 2015 © Diodes Incorporated AN431 A Product Line of Diodes Incorporated Package Outline Dimensions (All dimensions in mm(inch).) (1) Package Type: SOT-23 2.300(0.091) 2.500(0.098) 1.200(0.047) 1.400(0.055) 0.890(0.035) 1.030(0.041) 0.300(0.012) 0.510(0.020) 1.900(0.075)REF 2.800(0.110) 3.000(0.118) 2.0° 3.0 ° 0.500(0.020) 0.700(0.028) 1.050(0.041)REF 0.010(0.0004) 0.100(0.004) 0.900(0.035) 1.100(0.043) 4×R0.100(0.004) 7.0° 7.0° 0.550(0.022)REF 0.200(0.008)MIN 0.100(0.004) GAUGE PLANE 0.080(0.003) 0.180(0.007) R0.100(0.004) 0.0°~10.0°
Document number: DS37414 Rev. 3 - 2 12 of 13 www.diodes.com April 2015 © Diodes Incorporated AN431 A Product Line of Diodes Incorporated Suggested Pad Layout (1) Package Type: SOT-23 Y GZ Y X E Grid placement courtyard Dimensions Z (mm)/(inch) G (mm)/(inch) X (mm)/(inch) Y (mm)/(inch) E (mm)/(inch)
Document number: DS37414 Rev. 3 - 2 13 of 13 www.diodes.com April 2015 © Diodes Incorporated AN431 A Product Line of Diodes Incorporated IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT L IMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improve ments, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability a rising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such appli cations shall assume all risks of such use and will agree to hold D iodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, exp enses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or for eign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only th e English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or system s without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose fai lure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety -critical, life support devices or systems, notwithstanding any devices - or systems -related information or support that may be provided by Diodes Incorpora ted. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2015, Diodes Incorporated www.diodes.com