NJM2397 ADJUSTABLE LOW DROPOUT VOLTAGE REGULATOR GENERAL DESCRIPTION The NJM2397 is adjustable low dropout voltage regulator. The output current is up to 1.5A and dropout voltage is 0.2Vtyp. at Io=0.5A. PACKAGE OUTLINE The NJM2397 is suitable for power module, TV, Display, car stereo and low power applications. FEATURE z Low Dropout Voltage VI-O=0.2V typ. at Io=0.5A z Output Current Io(max.)=1.5A z Reference Voltage Vref=1.29V typ. z Internal Short Circuit Current Limit z Internal Overvoltage Protection z Internal Thermal Overload Protection z Bipolar Technology z Package Outline TO-220F(4pin) NJM2397F PIN CONFIGURATION PIN FUNCTION 1. VIN 2. VOUT 3. GND 4. ADJ 1234 NJM2397F EQUIVALENT CIRCUIT VOUT VIN Overvoltage Protection VADJ Bandgap Reference GND Ver.2006-02-21 Thermal Protection Current Limit -1- NJM2397 ABSOLUTE MAXIMUM RATINGS PARAMETER Input Voltage Adjust terminal Voltage Output Current Power Dissipation Operating Junction Temperature Range Operating Temperature Range Storage Temperature Range (Ta=25C) RATINGS UNIT +35 V +6 V 1.5 A W 18(Tc<50C) -40 to +150 C -40 to 85 C -50 to 150 C SYMBOL VIN VADJ Io PD Tj Topr Tstg ELECTRICAL CHARACTERISTICS (VIN=15V, Vo=10V, Io=0.5A, R1=1k, CIN=0.33uF, Co=22uF, Tj=25C) Measurement is to be conducted is pulse testing. PARAMETER Input Voltage Output Voltage Reference Voltage Line Regulation Load Regulation Average Temperature Coefficient of Output Voltage Quiescent Current Dropout Voltage SYMBOL CONDITIONS VIN Vo Vref Vo/VIN VIN=Vo+1V~Vo+17V Vo/Io VIN=Vo+2V, Io=0A~1.5A Ripple Rejection RR MIN. 3.8 1.5 1.238 - TYP. 1.29 0.04 0.2 MAX. 35 20 1.342 0.16 1.4 UNIT V V V %/V %/A Vo/T Tj=0~125C - 0.02 - %/C IQ VI-O Io=0A Io=0.5A Vin=Vo+2V, ein=0.5Vrms, f=120Hz - 0.2 5 0.5 mA V 45 55 - dB TEST CIRCUIT 1 VIN 0.33uF NJM2397 IQ A R2 A 4 3 + 2 Vref V Io + R1 1k 22uF V Vo RL Vo = Vref x (1 + R2/R1) -2- Ver.2006-02-21 NJM2397 TYPICAL CHARACTERISTICS Ver.2006-02-21 -3- NJM2397 TYPICAL CHARACTERISTICS -4- Ver.2006-02-21 NJM2397 [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.2006-02-21 -5-