ME78L05PG

ME78L05 3-Terminal Positive Voltage Regulator ME78L05 General Description Features ME78L05 is three-terminal positive regulators. One of these regulators can deliver up to 100 mA of output current. The internal limiting and thermal ●Output Current of 100mA ●Output Voltages of 5V±5% over the temperature range -shutdown features of the regulator make them ●Thermal Overload Protection essentially immune to overload. When used as a ●Short Circuit Protection replacement for a zener diode-resistor Comb- ●Output transistor safe area protection ination, an effective improvement in output impe- ●No external components dance can be obtained, together with lower ●Package：SOT89-3 and TO92(Taping Package) quiescent current. Selection Guide Pin Configuration 1. Output SOT89-3 2. GND 3. Input TO92 1.Output 2.GND 3.Input TO92 taping 1.Output V02 www.microne.com.cn 2.GND 3.Input Page 1 of 9 ME78L05 Maximum Ratings(Ta=25℃) Parameter Rating Unit Input supply voltage : VIN 30 V MAX. Output current:Iout 100 mA Max Power:Pmax 0.35 W Maximum junction temperature: Tj -25～125 ℃ Storage temperature :Tstr -55～150 ℃ Soldering temperature and time +260（Recommended 10S） ℃ Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. Block Diagram Serise pass Element 1 Input Circuit Generator 3 Output SOA Protection R1 Starting Circuit Reference Voltage Error Amplifier Thermal Protection R2 GND 2 V02 www.microne.com.cn Page 2 of 9 ME78L05 Electrical Characteristics (Cin =0.33μF, Co =0.1μF,0≤Tj≤125OC, unless otherwise noted) Parameter Symbol Output Voltage VO Conditions Min. Typ. Max. IO=40mA, VIN=10V 4.82 5.0 5.18 IO=1mA～40mA VIN=7V～20V 4.8 5.0 5.2 IO=1mA～10mA VIN=10V 4.75 5.0 5.25 VIN=7V～20V,IO=40mA -150 - 150 VIN=8V～20V,IO=40mA -100 - 100 VIN=10V,IO=1mA-100mA -60 - 60 VIN=10V,IO=1mA-40mA -30 - 30 Unit V Line Regulations LNR mV Load Regulation LDR Dropout Voltage VDIF Tj=25OC,Io=100mA - 2 - V Output noise Voltage VN f=10Hz to 100KHz - 40 - μV/Vo Tj=25 C,f=120Hz,Io=40mA VIN=8V～20V - 80 - dB mV O Ripple Rejection PSRR Peak Output Current Ipk Tj=25OC - 500 - mA Quiescent Current IQ VIN=10V,IOUT=40mA - - 5.5 mA Quiescent Current Change ΔIQ VIN=8V～20V,IO=40mA -1.5 - 1.5 VIN=10V,IO=1mA～40mA, -0.1 - 0.1 mA LNR: Line Regulation. The change in output voltage for a change in the input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that the average chip temperature is not significantly affected. LDR: Load Regulation.The change in output voltage for a change in load current at constant chip temperature. Type Characteristics Ta=25℃ Io=100mA VIN=10V Ta=25℃ Io=40mA V02 www.microne.com.cn Page 3 of 9 ME78L05 Io=10mA VIN=7V VIN=10V Ta=25℃ Io=40mA Ta=25℃ VIN=10V Ta=25℃ Operation Description ME78L05 is designed with Thermal Overload Protection that shuts down the circuit when subjected to an excessive power overload condition, Internal Short Circuit Protection that limits the maximum current the circuit will pass, and Output Transistor Safe-Area Compensation that reduces the output short circuit current as the voltage across the pass transistor is increased. In many low current applications, compensation capacitors are not required. However, it is recommended that the regulator input be bypassed with a capacitor if the regulator is connected to the power supply filter with long wire lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high frequency characteristics to insure stable operation under all load conditions. A 0.33μFor larger tantalum, mylar, or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulator’s input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead. V02 www.microne.com.cn Page 4 of 9 ME78L05 Typical Application Circuit ME78L05 VIN Input Cin 0.33μF Output Co 0.1μF GND Fig.1 Fixed Output Regulator A common ground is required between the input and the output voltages. The input voltage must remain typically 2.0 V above the output voltage even during the low point on the input ripple voltage. ●Cin is required if regulator is located an appreciable distance from power supply filter. ●Co is not needed for stability; however, it does improve transient response. ME78L05 Input VIN Cin 0.33μF Output GND R Io IQ Constant Current to Grounded Load Fig.2 Constant Current Regulator The ME78L05 regulatorcan also be used as a current source when connected as Fig.2. In order to minimize dissipation the ME78L05 is chosen in this application. Resistor R determines the current as follows: IO = ME78L05 VIN Input Cin 0.33μF 5V +IQ R Vo Output GND R1 0.1μF R2 Fig.3 Adjustable Output Regulator Vo=5V+5V/R1+IQ)*R2 5V/R1>3*IQ V02 www.microne.com.cn Page 5 of 9 ME78L05 Package Information Package Type:SOT89-3 Unit:mm(inch) Millimeters Inches DIM Min Max Min Max A 1.4 1.6 0.055 0.063 D 4.4 4.5 0.173 0.181 D1 V02 1.55REF 0.06REF E 2.35 2.55 0.091 0.102 E1 3.94 4.26 0.155 0.167 L 0.9 1.1 0.035 0.047 b 0.35 0.52 0.013 0.197 b1 0.4 0.58 0.016 0.023 c 0.35 0.44 0.014 0.017 e Type:1.5 Type:0.05 e1 Type:3.0 Type:0.115 www.microne.com.cn Page 6 of 9 ME78L05 Packaging Type: TO-92 Unit:mm(inch) V02 Min Max Min Max A 3.4 3.7 0.1338 0.1457 B 0.36 0.5 0.0142 0.0167 C 4.35 4.7 0.1712 0.1850 D 4.35 4.7 0.1712 0.1850 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 7 of 9 ME78L05 Packaging Type: TO-92 taping package Unit:mm(inch) V02 Min Max Min Max A 4.35 4.7 0.1712 0.1850 B 3.25 3.75 0.1279 0.1476 C 13.2 13.8 0.5197 0.5433 D 3.4 3.7 0.1338 0.1457 E 0.4 0.55 0.0157 0.0216 a 2.3 2.7 0.0905 0.1063 b 2.3 2.7 0.0905 0.1063 e 0.36 0.5 0.0142 0.0167 L 4.35 4.7 0.1712 0.1850 www.microne.com.cn Page 8 of 9 ME78L05      V02 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. www.microne.com.cn Page 9 of 9