NJM2845/46 LOW DROPOUT VOLTAGE REGULATOR GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2845/46 is low dropout voltage regulator. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. NJM2845 is 3 terminal type and NJM2846 is ON/OFF control NJM2845DL1 NJM2846DL3 built in type. These product can be selected according to the applications. FEATURES High Ripple Rejection 75dB typ. (f=1kHz,3V Version) Output Noise Voltage Vno=45 Vrms typ. (Vo=3V Version) Output capacitor with 2.2 F ceramic capacitor (Vo2.6V) Output Current Io(max.)=800mA High Precision Output Vo 1.0% Low Dropout Voltage 0.18V typ. (Io=500mA) ON/OFF Control (NJM2846) Internal Short Circuit Current Limit Internal Thermal Overload Protection Bipolar Technology Package Outline TO-252-3 (NJM2845DL1), TO-252-5 (NJM2846DL3) PIN CONFIGURATION 2 3 1.CONTROL 1.V IN 2.V IN 2.GND 3.GND 3.V OUT 4.Vo 5.NC 1 3 1 2 3 4 5 NJM2845DL1 NJM2846DL3 EQUIVALENT CIRCUIT VIN V V IN OUT VOUT Control Thermal Thermal Protection Protection Bandgap Bandgap Reference Reference GND GND NJM2845DL1 NJM2846DL3 Ver.2007-02-23 -1- NJM2845/46 OUTPUT VOLTAGE Device Name V OUT NJM284*DL*-15 1.5V NJM284*DL*-18 1.8V NJM284*DL*-22 2.2V NJM284*DL*-23 2.3V NJM284*DL*-25 2.5V NJM284*DL*-03 3.0V NJM284*DL*-33 3.3V NJM284*DL*-05 5.0V Output voltage options available : 1.5 ~ 5.0V (0.1V step) ABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER SYMBOL RATINGS UNIT Input Voltage V +14 V IN Control Voltage V +14(*1) V CONT 10(Tc25C) Power Dissipation P W D 1.0(Ta25C) Operating Topr -40 +85 C Temperature Storage Tstg -40 +150 C Temperature (*1): When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage. Operating voltage V =+2.5V(In case of Vo<2.3V) ~ +(Vo+10V) IN NJM2845 ELECTRICAL CHARACTERISTICS (V =Vo+1V, C =0.33 F ,Co=2.2 F(1.7V<Vo2.6V:Co=4.7 F, Vo1.7V: Co=10 F), Ta=25C) IN IN PARAMETER SYMBOL TEST CONDITION MIN.TYP. MAX. UNIT Output Voltage Vo Io=30mA -1.0% - +1.0% V Quiescent Current I Io=0mA - 400 600 A Q Output Current Io Vo - 0.3V 800 1050 - mA Line Regulation Vo/ V V =Vo+1V Vo+6V, Io=30mA - - 0.10 %/V IN IN Load Regulation - - 0.004 %/mA Vo/Io Io=0 800mA Dropout Voltage(*2) V Io=500mA - 0.18 0.28 V I -O ein=200mVrms, f=1kHz, Io=10mA, Ripple Rejection RR - 75 - dB Vo=3V Version Average Temperature Coefficient of Output Vo/Ta Ta=0 85C, Io=10mA - 50 - ppm/C Voltage f=10Hz 80kHz, Io=10mA, Output Noise Voltage V - 45 - Vrms NO Vo=3V Version (*2): The output voltage excludes under 2.3V. 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. Ver.2007-02-23 - 2 -