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 VRT ±1.0% " Reset Hold Time td = 10mS±1.0mS " Ripple Rejection 70dB typ. (f =1kHz) " Quiescent Current IQ = 250µA (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 NJM2804U ! OUTPUT VOLTAGE/ DETECTION VOLTAGE Device Name VOUT VDET NJM2804U2528 2.5V 2.8V NJM2804U3342 3.3V 4.2V ! EQUIVALENT CIRCUIT VIN VOUT Thermal Protection VOR Bandgap Reference GND Cd Ver.2004-01-19 -1- NJM2804 ! ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS (Ta=25°C) UNIT Input Voltage VIN +14 V Power Dissipation PD 350 mW Operating Temperature Topr -40 ∼ +85 °C Storage Temperature Tstg -40 ∼ +125 °C ! ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, CIN=0.1µF, Co=1.0µF (Co=2.2µF: Vo≤2.6V) Ta=25°C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT − 250 350 µA +1.0% V mA %/V Quiescent Current Regulator Block IQ VIN=Vo+2V, Io=0mA Output Voltage Vo Io=30mA -1.0% Output Current Io Vo-0.3V 300 − 200 Line Regulation ∆Vo/∆VIN VIN=Vo+1V ∼ Vo+6V, Io=30mA − − − 0.10 Load Regulation ∆Vo/∆Io %/mA − − 0.10 0.03 ∆VI_O Io=0 ∼ 100mA Io=60mA − Dropout Voltage 0.18 V Ripple Rejection RR ein=200mVrms, f=1kHz, Io=10mA,Vo=3V − 60 − dB Ta=0 ∼ 85°C, Io=10mA − ± 50 − ppm/°C VNO f=10Hz ∼ 100kHz, Io=10mA, Vo=3V − 45 − µVrms Voltage Detection VRT VIN=H→L Hysteresis Voltage Low Level Output Voltage Output Leak Current VRTH RORL IORH VIN=H→L→H VIN=VRT-0.5V, RL=100kΩ VIN= VRT+0.5V On time Output Current IORL Output Voltage Temperature Coefficient Output Noise Voltage ∆Vo/∆T Reset Block Reset Output Delay Time Operation Voltage Limit td VOPL -1.0% +1.0% − VRT×3 VRT×5 VRT×8 100 300 − 0.1 − − V mV mV µA mA VIN=VRT-0.5V, RL=0Ω 5 VIN=(VRT-0.5V)→ (VRT+0.5V), Cd=0.1µF 9 − 10 − 11 mS VORL=0.4V − 0.9 − V (*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.2004-01-19 NJM2804 ! TIMING CHART VIN[V] V RTH V RT VO t VO[V] VO t VOR[V] td td ∗ VOR is the case where a pull-up is carried out to VIN through resistance. Ver.2004-01-19 td t -3- NJM2804 ! TEST CIRCUIT IQ VIN VO IOR NJM2804 RL 0.1µF Cd VIN V VOR 1.0µF GND V 0.1µF IOUT VOUT VOR ! TYPICAL APPLICATIONS VIN VIN VO NJM2804 100kΩ 0.1µF Cd VOUT VOR 1.0µF VOR GND 0.1µF -4- Ver.2004-01-19 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.2004-01-19 -5-