SSP78M05

SSP78MXX Features  Output Current of 500mA  Output transistor safe area protection  Thermal Overload Protection  No external components  Short Circuit Protection  Package：TO252  Output voltage accuracy: tolerance ±5% General Description re p l a ce m e n t fo r a ze n e r di o d e - re s i st o r One of these regulators can deliver up to Combination, an effective improvement in output 500mA of output current. The internal limiting impedance can be obtained, together with lower and thermal quiescent current. -shutdown features of the regulator make them essentially immune to overload. When used as a PR O Pin Configuration IN SSP78MXX is three-terminal positive regulators. SI TO252(Top View) GND VIN Ver1.5 VOUT 1 Shanghai Siproin Microelectronics Co. SSP78MXX Selection Table Part No. SSP78M05 SSP78M06 SSP78M08 SSP78M09 SSP78M12 Output Voltage 5.0V 6.0V 8.0V 9.0V 12V Package TO252 SI PR O IN Block Diagram Absolute Maximum Ratings（Ta=25℃） Parameter Rating Unit Input supply voltage: VIN 35 V MAX. Output current:Iout 500 mA MAX Power:Pmax 0.5 W Maximum junction temperature:Tj -25~125 ℃ Storage temperature:Tstr -55~125 ℃ Soldering temperature and time +260(Recommended 10S) ℃ Note: 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. Ver1.5 2 Shanghai Siproin Microelectronics Co. SSP78MXX Electrical Characteristics (Cin=0.33uF, Co=0.1uF, 0≤Tj≤125℃，unless otherwise noted) Parameter Symbol Conditions Min. Typ. Max. Io=40mA, VIN=10V 0.964vout vout 1.036vou t 0.96vout vout 1.04vout 0.95vout vout 1.05vout VIN=7V~18V, Io=40mA -150 - 150 VIN=8V~18V, Io=40mA -100 - 100 Unit Io=1mA~40mA Output Voltage Vout VIN=7V~18V V Io=1mA~10mA VIN=10V LNR mV IN Line Regulation VIN=10V, -60 - 60 Io=1mA~100mA Load Regulation LDR VIN=10V, - 30 - 2 - V - 40 - uV/Vo - 80 - dB VIN=10V, IOUT=40mA - - 5.5 mA VIN=8V~18V, IO=40mA -1.5 - 1.5 -0.1 - 0.1 O -30 Io=1mA~40mA Output noise Voltage VDIF Tj=25℃，Io=100mA PR Dropout Voltage VN mV F=10Hz to 100KHz Tj=25℃，f=120Hz, PSRR Io=40mA, VIN=8V~20V SI Ripple Rejection Quiescent Current Quiescent IQ △IQ Current VIN=10V, Change IOUT=1mA~40mA, 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. Ver1.5 3 Shanghai Siproin Microelectronics Co. SSP78MXX SI PR O IN Typical Performance Characteristics Ver1.5 4 Shanghai Siproin Microelectronics Co. SSP78MXX Operation Description SSP78MXX 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 IN 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. SI PR O Typical Application 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. Ver1.5 5 Shanghai Siproin Microelectronics Co. SSP78MXX The SSP78MXX regulator can also be used as a current source when connected as Fig.2. In order to minimize dissipation the SSP78XX is chosen in this application. Resistor R determines the current as SI PR O IN follows: Ver1.5 6 Shanghai Siproin Microelectronics Co. SSP78MXX Package Information SI PR O IN 3-pin TO252 Outline Dimensions Ver1.5 7 Shanghai Siproin Microelectronics Co.