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| NJM2804 Low Dropout Voltage Regulator with Reset GENERAL DISCRIPTION The NJM2804 is a low dropout voltage regulator with reset function. It provides up to 300mA of logic supply, and the reset function monitors input voltage of the regulator with 1% accuracy. It is suitable for local power supply and reset for small micro controller and other logic chips. FEATURES Output Voltage Accuracy Vo = 1.0% Reset Voltage Accuracy Vreset = 1.0% Reset Hold Time td = 10mS1.0mS Ripple Rejection 70dB typ. (f=1kHz) Quiescent Current IQ=250A (typ.) Input Voltage Monitor type Open Collector Output Internal Short Circuit Current Limit Internal Thermal Overload Protection Bipolar Technology Package Outline SOT-89 -5 PACKAGE OUTLINE NJM2804U PIN CONFIGURATION 5 2 4 1 2 3 PIN FUNCTION 1.VOUT 2.GND 3.Cd 4.VOR 5.VIN SOT-89-5 OUTPUT VOLTAGE/ DETECTION VOLTAGE Device Name Output Voltage Detection Voltage NJM2804U2528 2.5V 2.8V NJM2804U3342 3.3V 4.2V EQUIVALENT CIRCUIT VIN Thermal Protection VO VOR Bandgap Reference GND Cd Ver.2003-10-31 -1- NJM2804 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage Power Dissipation Operating Temperature Storage Temperature VIN PD Topr Tstg (Ta=25C) UNIT V mW C C RATINGS +14 350 -40+85 -40+125 ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, CIN=0.1F, Co=1F (Vo2.6V: Co=2.2F) Ta=25C) PARAMETER SYMBOL TEST CONDITION Quiescent Current Regulator Block Output Voltage Output Current Line Regulation Load Regulation Dropout Voltage Ripple Rejection Output Voltage Coefficient Output Noise Voltage Reset Block Voltage Detection Hysteresis Voltage Low Level Output Voltage Output Leak Current On time Output Current Reset Output Delay Time Operation Voltage Limit VRT VRTH RORL IORH IORL td VOPL VIN=HL VIN=HLH VIN=VRT-0.5V, RL=100k VIN= VRT+0.5V VIN=VRT-0.5V, RL=0 VIN=(VRT-0.5V) (VRT+0.5V), Cd=0.1F VORL=0.4V Temperature Vo Io Vo/VIN Vo/Io VI_O RR Vo/T VNO Io=30mA Vo-0.3V VIN=Vo+1VVo+6V, Io=30mA Io=0100mA Io=60mA ein=200mVrms, f=1kHz, Io=10mA,Vo=3V Ta=085C, Io=10mA f=10Hz100kHz, Io=10mA, Vo=3V IQ VIN=Vo+2V, Io=0mA MIN. - -1.0% 300 - - - - - - -1.0% - - 5 9 - TYP. 250 - 200 - - 0.10 60 50 45 MAX. 350 UNIT A V mA %/V %/mA V dB ppm/C Vrms +1.0% - 0.10 0.03 0.18 - - - - 100 - - 10 0.9 +1.0% V mV mV A mA mS V VRTx3% VRTx5% VRTx8% 300 0.1 - 11 - (note 1) The above specification is a common specification for all output voltages. Therefore, it may be different from the individual specification for a specific output voltage. -2- Ver.2003-10-31 NJM2804 TIMING CHART VIN[V] V RTH V RT VO t VO[V] VO t VOR[V] td td td VOR is the case where a pull-up is carried out to VIN through resistance. t Ver.2003-10-31 -3- NJM2804 TEST CIRCUIT IQ VIN VO IOR NJM2804 0.1F VIN RL Cd GND VOR V 1.0F IOUT VOUT V 0.1F VOR TYPICAL APPLICATIONS VIN VIN VO VOUT NJM2804 0.1F 100k 1.0F VOR Cd GND 0.1F VOR -4- Ver.2003-10-31 NJM2804 [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. Ver.2003-10-31 -5- |
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