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| NJM2873 LOW DROPOUT VOLTAGE REGULATOR s GENERAL DESCRIPTION The NJM2873 is low dropout voltage regulator designed for cellular phone application. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. s FEATURES qHigh Ripple Rejection 70dB typ. (f=1kHz) qOutput Noise Voltage Vno=30Vrms (Cp=0.01F) qOutput capacitor with 1.0uF ceramic capacitor (Vo2.7V) qOutput Current Io(max.)=150mA qHigh Precision Output Vo1% qLow Dropout Voltage 0.10V typ. (Io=60mA) qON/OFF Control (Active High) qInternal Short Circuit Current Limit qInternal Thermal Overload Protection qBipolar Technology qPackage Outline FFP12-B1 (2.0x2.0x0.85mm) s PIN CONFIGURATION 9 10 11 12 1 2 3 8 7 6 5 4 s PACKAGE OUTLINE NJM2873PB1 PIN FUNCTION 1. VIN 2. VIN 3. VIN 4. CONTROL 5. GND 6. GND 7. GND 8. NOISE BYPASS 9. NC 10. VOUT 11. VOUT 12. VOUT NJM2873PB1 s EQUIVALENT CIRCUIT VIN Cont Thermal Protection VOUT Noise Bypass Bandgap Reference GND NJM2873 s ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Power Dissipation PD Operating Temperature Topr Storage Temperature Tstg (Ta=25C) RATINGS UNIT +14 V +14(note 1) V 300(note 2) mW -40 +85 C -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)On board. s ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, CIN=0.1uF, Co=1.0uF: Vo2.7V (Co=2.2uF: Vo2.6V), Cp=0.01uF, Ta=25C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Io=30mA Output Voltage Vo -1% +1% V - Io=0mA, expect Icont Quiescent Current 120 180 IQ A - Quiescent Current VCONT=0V 100 nA IQ(OFF) - - at Control OFF Output Current Io 150 200 mA Vo-0.3V Line Regulation 0.10 %/V Vo/VIN VIN=Vo+1V Vo+6V, Io=30mA - - Load Regulation 0.03 %/mA Vo/Io Io=0 100mA - - Dropout Voltage Io=60mA 0.10 0.18 V VI-O - ein=200mVrms,f=1kHz, Io=10mA Ripple Rejection RR 70 dB - - VIN=Vo+1V, Vo=3V Version Average Temperature Vo/Ta Ta=085C, Io=10mA 50 - - ppm/C Coefficient of Output Voltage f=10Hz80kHz, Io=10mA, Output Noise Voltage VNO 30 Vrms - - Vo=3V Version Control Voltage for ON-state VCONT(ON) 1.6 V - - Control Voltage for OFF-state VCONT(OFF) 0.6 V - - (note 3)Please confirm the specification separately because some parameters depend on output voltage. s OUTPUT VOLTAGE RANK LIST Device Name VOUT NJM2873PB1-21 2.1V NJM2873PB1-25 2.5V NJM2873PB1-26 2.6V NJM2873PB1-27 2.7V NJM2873PB1-28 2.8V NJM2873PB1-285 2.85V NJM2873PB1-03 3.0V NJM2873PB1-33 3.3V NJM2873PB1-38 3.8V NJM2873PB1-05 5.0V NJM2873 s TEST CIRCUIT VOUT VOUT VOUT 1.0F OR 2.2F(Vo2.6V) V IOUT VOUT VIN NC A IIN VIN 0.1F VIN NJM2873 NOISE BYPASS Cp=0.01F VIN CONTROL GND GND GND A I CONT V VCONT NJM2873 s TYPICAL APPLICATION x In the case where ON/OFF Control is not required: VOUT VOUT VOUT 1.0F OR 2.2F(Vo2.6V) V IOUT VOUT VIN NC A IIN VIN 0.1F VIN NJM2873 NOISE BYPASS Cp=0.01F VIN CONTROL GND GND GND A I CONT V VCONT Connect control terminal to VIN terminal In case a resistance "R" is used, the quiescent current will be decreased. However, the but minimum operating voltage will be increase as well. Please refer to a figure of Output Voltage vs. Control Voltage. NJM2873 y In use of ON/OFF CONTROL: VOUT VOUT VOUT 1.0F OR 2.2F(Vo2.6V) VOUT VIN NC VIN VIN NJM2873 NOISE BYPASS Cp=0.01F 0.1F VIN GND CONTROL R (0300k) GND GND In case the control terminal is "H", the output is enabled. The control terminal is "L" or "open", the 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. Please refer to the typical characteristics to determine the value. Use of smaller Cp value may induce oscillation. Please make sure to use Cp value of greater than 0.01uF to avoid the problem. NJM2873 s ELECTRICAL CHARACTERISTICS NJM2873 s ELECTRICAL CHARACTERISTICS NJM2873 s ELECTRICAL CHARACTERISTICS NJM2873 [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. |
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