ME431AXG

ME431 Adjustable Precision Shunt Regulator General Description Features The ME431 series ICs are three-terminal adjustable shunt regulators with guaranteed thermal stability over a ● Programmable Precise Output Voltage from 2.5V to 36V full operation range. These ICs feature sharp turn-on ● Very Accurate Reference Voltage: Typical 0.15% characteristics, low temperature coefficient and low ● High Stability under Capacitive Load output impedance, which make them ideal substitutes for ● Low Temperature Deviation: Typical 4.5mV Zener diodes in applications such as switching power ● Low Equivalent Full-range Temperature supply, charger and other adjustable regulators. The ME431 voltage type is 40V. The output voltage Coefficient with 20PPM/℃ Typical ● Low Dynamic Output Resistance: Typical 0.2Ω can be set to any value between VREF (2.5V) and the ● Sink Current Capacity from 1mA to 100 mA corresponding maximum cathode voltage. ● Low Output Noise Selection Guide The ME431 precision reference is offered in two band ● Wide Operating Range of -40 to 150℃ gap tolerance: 0.4% and 1.0%. Typical Application Package ● Charger ● 3-pin SOT23、TO92 ● Voltage Adapter ● Switching Power Supply ● Graphic Card ● Precision Voltage Reference V05 www.microne.com.cn Page 1 of 12 ME431 Selection Guide ME 431 X X X X G Environment mark Package: X-SOT23 T-TO92 TB-TO92 paper tape Function A-0.4% B-1.0% NA-0.4%, different pin NB-1.0%, different pin Product Series Microne product series V05 product description ME431AXG VREF=2.5V±0.4%； Package：SOT23 ME431BXG VREF =2.5V±1.0%； Package：SOT23 ME431ATG VREF =2.5V±0.4%； Package：TO92 ME431BTG VREF =2.5V±1.0%； Package：TO92 ME431ATBG VREF =2.5V±0.4%； Package：TO92；paper tape ME431BTBG VREF =2.5V±1.0%； Package：TO92； paper tape ME431NAXG VREF =2.5V±0.4%； Package：SOT23； Different pin ME431NBXG VREF =2.5V±1.0%； Package：SOT23； Different pin www.microne.com.cn Page 2 of 12 ME431 PIN Configuration TO-92 SOT23 Pin Assignment Pin Number Symbol Functions 3 REF reference 2 2 K anode 3 1 A cathode ME431 ME431N 1 Block Diagram and symbol CATHODE REF REF ANODE CATHODE VREF ANODE V05 www.microne.com.cn Page 3 of 12 ME431 Absolute Maximum Ratings PARAMETER SYMBAL RATING UNIT Cathode voltage VKA 40 V Cathode current range (continuous) IKA -100~+130 mA Reference input current range IREF 10 mA Power Dissipation PD Junction temperature TJ 160 ℃ Storage Temperature range TSTG -65~+150 ℃ Package thermal impedance θJA TO-92 Package: 770 SOT23 Package:300 TO-92 package:150 SOT23 package:350 mW ℃/W Note: Use this IC within the stated maximum ratings. Operation beyond these limits may cause degrading or permanent damage to the device. Recommended Operating Conditions Parameter Symbol Min Max Unit Cathode Voltage VKA VREF 36 V Cathode Current IKA 1.0 100 mA -40 125 ℃ Operating Ambient Temperature Range V05 www.microne.com.cn Page 4 of 12 ME431 Electrical Characteristics Parameter Reference voltage 0.4% 1.0% Deviation of reference voltage over-temperature Dynamic impedance Minimum cathode current for regulation Ratio of change in reference voltage to the change in cathode voltage (TA=25℃ ,unless otherwise noted) Symbol Conditions Min Typ. Max VREF VKA=VREF, IKA=10mA 2.490 2.50 2.510 2.475 2.50 2.525 0 to 70℃ - 7 10 Unit Test circuit V Fig.1 mV Fig.1 ∆VREF VKA=VREF, IKA=10mA -40 to 150℃ - 25 30 | ZKA | VKA=VREF, IKA=1 to 100mA, f≤1.0KHz - 0.15 0.5 Ω Fig.1 IKA (MIN) VKA=VREF - 0.4 1.0 mA Fig.1 ΔVKA =10V to VREF - -0.8 -2.5 ΔVKA =36V to 10V mV/V Fig.2 - ΔVREF ΔVKA IKA=10mA -0.6 -1.5 IREF IKA=10mA, R1=10KΩ, R2=∝ 0.7 3 μA Fig.2 Deviation of reference over full temperature range ∆IREF IKA=10mA, R1=10KΩ, R2=∝,TA=40 to 150℃ 0.1 1.2 μA Fig.2 Off-state cathode current IKA (OFF) VKA=36V, VREF=0 0.03 0.3 μA Fig.3 Reference current Note:The dynamic impedance is defined as: | ZKA | =△VKA/△IKA Test circuit VIN R1 VKA VIN R3 IKA VKA IKA VIN R2 VREF VK A = VR E F( 1 + R 1 / R 2 )R +E FI Fig.1: for VKA= VREF V05 VKA IOFF R1 VREF R1 Fig.2: for VKA> VREF www.microne.com.cn R1 Fig.3: for IOFF Page 5 of 12 ME431 Typical Performance Characteristics VKA=VREF IKA=10mA VKA=36V VREF =0 R1=10KΩ IKA=10mA VKA=3.5V to 36V VKA=VREF TA=25℃ V05 VKA=VREF TA=25℃ www.microne.com.cn Page 6 of 12 ME431 Small Signal Voltage Gain vs. Frequency Output 15K IKA 242Ω 10μF ME431 8.2K GND Reference Impedance vs. Frequency Output 1K IKA ME431 50Ω GND Stability Boundary Conditions vs. Load Capacitance R1 10K 150Ω IKA R2 V05 www.microne.com.cn Page 7 of 12 ME431 Pulse Response of Input and Output Voltage 220Ω Output Pulse Generator F=100KHz 50Ω GND Typical Application VO=(1+R1/R2)VREF VO=(1+R2/R3)VREF Fig.4: Shunt Regulator Fig.5: High Current Shunt Regulator IOUT=VREF/R2+IKA Fig.6: Current Source or Current Limit V05 www.microne.com.cn Fig.7: Precision 5V 1.5A Regulator Page 8 of 12 ME431 Packaging Type ● TO-92 DIM V05 Millimeters Inches Min Max Min Max A 3.4 3.8 0.13386 0.1496 B 0.3 0.5 0.0118 0.0197 C 4.4 4.8 0.1732 0.189 D 4.4 4.8 0.1732 0.189 E 0.9 1.5 0.0354 0.059 e 1.17 1.37 0.046 0.0539 e1 2.39 2.69 0.094 0.1059 L 12 16 0.4724 0.6299 www.microne.com.cn Page 9 of 12 ME431 ● TO-92 (Paper Tape) V05 单位：mm www.microne.com.cn Page 10 of 12 ME431 ● SOT23 DIM Millimeters Inches Min Max Min Max A 2.7 3.1 0.1063 0.122 B 1.7 2.1 0.0669 0.0827 b 0.35 0.5 0.0138 0.0197 C 1.0 1.2 0.0394 0.0472 c 0.1 0.25 0.0039 0.0098 d 0.2 - 0.0079 - E 2.1 2.64 0.0827 0.1039 e 1.2 1.4 0.0472 0.0551 V05 www.microne.com.cn Page 11 of 12 ME431      The information described herein is subject to change without notice. Nanjing Micro One Electronics Inc is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. The application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Nanjing Micro One Electronics Inc is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Nanjing Micro One Electronics Inc. Although Nanjing Micro One Electronics Inc exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. The user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue. V05 www.microne.com.cn Page 12 of 12