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| NJM2881/82 LOW DROPOUT VOLTAGE REGULATOR s GENERAL DESCRIPTION The NJM2881/82 is a low dropout voltage regulator designed for portable applications. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. s PACKAGE OUTLINE NJM2881F NJM2882F s FEATURES qHigh Ripple Rejection 75dB typ. (f=1kHz) qOutput Noise Voltage Vno=30Vrms (Cp=0.01F) qOutput capacitor with 1.0uF ceramic capacitor (Vo2.7V) qOutput Current Io(max.)=300mA qHigh Precision Output Vo1% qLow Dropout Voltage 0.10V typ. (Io=100mA) qON/OFF Control (Active High) qOperating Voltage Range +2.3V+6V (Vo2.0V version) qInternal Short Circuit Current Limit qInternal Thermal Overload Protection qBipolar Technology qPackage Outline MTP5 (MTP5:2.8x2.9x1.1mm) s PIN CONFIGURATION 1 2 3 4 5 NJM2881F PIN FUNCTION 5 1. CONTROL (Active High) 1 2 2. GND 3. NOISE BYPASS 3 4 4. VOUT 5. VIN NJM2882F PIN FUNCTION 1.VIN 2.GND 3.CONTROL (Active High) 4.NOISE BYPASS 5.VOUT s EQUIVALENT CIRCUIT VIN Cont Thermal Protection VOUT Noise Bypass Bandgap Reference GND Ver.2003-03-12 -1- NJM2881/82 s ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT (Ta=25C) RATINGS UNIT +14 V +14(note 1) V 200(note 2) Power Dissipation PD mW 350(note 3) Operating Temperature Topr -40 +85 C Storage Temperature Tstg -40 +125 C (note 1) When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage. (note 2)Device itself. (note 3)On board. 76.2x114.3x1.6mm (Double layer, FR-4) s ELECTRICAL CHARACTERISTICS (Vo>2.0V version : VIN=Vo+1V, CIN=0.1F, Co=1.0F: Vo2.7V (Co=2.2F: Vo2.6V), Cp=0.01F, Ta=25C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. Io=30mA Output Voltage Vo -1.0% +1.0% - Io=0mA, expect Icont Quiescent Current 120 180 IQ - Quiescent Current VCONT=0V 100 IQ(OFF) - - at Control OFF Output Current Io 300 400 Vo-0.3V Line Regulation 0.10 Vo/VIN VIN=Vo+1V Vo+6V, Io=30mA - - Load Regulation 0.03 Vo/Io Io=0 300mA - - Dropout Voltage Io=100mA 0.10 0.18 VI-O - ein=200mVrms,f=1kHz, Io=10mA, Ripple Rejection RR 75 - - Vo=3V Version Average Temperature Vo/Ta Ta=0+85C, Io=10mA 50 - - Coefficient of Output Voltage f=10Hz80kHz, Io=10mA, Output Noise Voltage VNO 30 - - Vo=3V Version Control Voltage for ON-state 1.6 VCONT(ON) - - Control Voltage for OFF-state 0.6 VCONT(OFF) - - (Vo2.0V version : VIN=Vo+1V, CIN=0.1F, Co=2.2F: Vo1.9V (Co=4.7F: Vo1.8V), Cp=0.01F, Ta=25C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. Io=30mA Output Voltage Vo -1.0% +1.0% - Io=0mA, expect Icont Quiescent Current 120 180 IQ - Quiescent Current VCONT=0V 100 IQ(OFF) - - at Control OFF Output Current Io 300 400 Vo-0.3V Line Regulation 0.10 Vo/VIN VIN=Vo+1V Vo+6V, Io=30mA - - Load Regulation 0.03 Vo/Io Io=0 300mA - - ein=200mVrms, f=1kHz, Io=10mA, Ripple Rejection RR 80 - - Vo=1.8V Version Average Temperature Vo/Ta Ta=085C, Io=10mA 50 - - Coefficient of Output Voltage f=10Hz80kHz, Io=10mA, Output Noise Voltage VNO 20 - - Vo=1.8V Version Control Voltage for ON-state 1.6 VCONT(ON) - - Control Voltage for OFF-state 0.6 VCONT(OFF) - - (note 4) 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. UNIT V A nA mA %/V %/mA V dB ppm/C Vrms V V UNIT V A nA mA %/V %/mA dB ppm/C Vrms V V -2- Ver.2003-03-12 NJM2881/82 s OUTPUT VOLTAGE RANK LIST Device Name VOUT 1.8V NJM288xF18 2.5V NJM288xF25 2.8V NJM288xF28 3.0V NJM288xF03 3.3V NJM288xF33 s TEST CIRCUIT A VIN IIN VIN VOUT IOUT 0.1uF 1.0uF *note1 (ceramic) V VOUT A V VCONT ICONT CONTROL GND NOISE BYPASS Cp=0.01uF *note1 1.9V Vo 2.6V version : Co=2.2uF(ceramic) Vo 1.8V version : Co=4.7uF(ceramic) s TYPICAL APPLICATION x In case that ON/OFF Control is not required: VIN VIN 0.1uF VOUT VOUT 1.0uF *note1 (ceramic) R (0300k) CONTROL GND NOISE BYPASS Cp=0.01uF *note1 1.9V Vo 2.6V version : Co=2.2uF(ceramic) Vo 1.8V version : Co=4.7uF(ceramic) Connect control terminal to VIN terminal The quiescent current can be reduced by using a resistance "R". Instead, it increases the minimum operating voltage. For further information, please refer to Figure "Output Voltage vs. Control Voltage". Ver.2003-03-12 -3- NJM2881/82 y In use of ON/OFF CONTROL: VIN VIN VOUT VOUT 0.1uF R CONTROL GND NOISE BYPASS 1.0uF *note1 (ceramic) Cp=0.01uF *note1 1.9V Vo 2.6V version : Co=2.2uF(ceramic) Vo 1.8V version : Co=4.7uF(ceramic) State of control terminal: *"H" output is enabled. * "L" or "open" output is disabled. Noise bypass Capacitance Cp Noise bypass capacitance Cp reduces noise generated by band-gap reference circuit. Noise level and ripple rejection will be improved when larger Cp is used. Use of smaller Cp value may cause oscillation. Use the Cp value of 0.01uF greater to avoid the problem. -4- Ver.2003-03-12 NJM2881/82 [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.2003-03-12 -5- |
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