NJM2880 LOW DROPOUT VOLTAGE REGULATOR ■ GENERAL DESCRIPTION The NJM2880 is a low dropout voltage regulator. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. ■ FEATURES ●High Ripple Rejection 70dB typ. (f=1kHz) ●Output Noise Voltage Vno=30uVrms (Cp=0.01uF) ●Output capacitor with 1.0uF ceramic capacitor ●Output Current Io(max.)=300mA ●High Precision Output Vo±1.0% ●Low Dropout Voltage 0.10V typ. (Io=100mA) ●ON/OFF Control (Active High) ●Internal Short Circuit Current Limit ●Internal Thermal Overload Protection ●Bipolar Technology ●Package Outline SOT-89(5pin) ■ PACKAGE OUTLINE NJM2880U ■ PIN CONFIGURATION NJM2880U PIN FUNCTION 1.CONTROL (Active High) 2.GND 3.NOISE BYPASS 4.VOUT 5.VIN ■ EQUIVALENT CIRCUIT VOUT VIN Cont Thermal Protection Noise Bypass Bandgap Reference GND ■ OUTPUT VOLTAGE RANK LIST Device Name Vout Device Name NJM2880U21 2.1V NJM2880U33 NJM2880U25 2.5V NJM2880U38 NJM2880U26 2.6V NJM2880U05 NJM2880U27 NJM2880U28 NJM2880U285 NJM2880U03 2.7V 2.8V 2.85V 3.0V Vout 3.3V 3.8V 5.0V NJM2880 ■ ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Power Dissipation PD Operating Temperature Topr Storage Temperature Tstg (Ta=25°C) RATINGS UNIT +14 V +14(note 1) V 350 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. ■ ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, Co=1.0uF: Vo≥2.7V (Co=2.2uF: Vo≤2.6V), Cp=0.01uF, Ta=25°C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. Output Voltage Vo Io=30mA -1.0% +1.0% Io=0mA, expect Icont Quiescent Current 120 180 IQ Quiescent Current VCONT=0V 100 IQ(OFF) at Control OFF Vo-0.3V Output Current Io 300 400 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 70 Vo=3V Version Average Temperature Coefficient of Output ∆Vo/∆Ta Ta=0∼85°C, Io=10mA ±50 Voltage f=10Hz∼80kHz, Io=10mA, Output Noise Voltage VNO 30 Vo=3V Version Control Voltage for 1.6 VCONT(ON) ON-state Control Voltage for VCONT(OFF) 0.6 OFF-state (note 2) 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. ■ TEST CIRCUIT A IIN VIN VIN VOUT 1.0uF OR 2.2uF(Vo<2.6V) (Ceramic Capacitor) 0.1uF A V ICONT CONTROL NOISE BYPASS Cp=0.01uF GND VCONT IOUT V VOUT UNIT V uA nA mA %/V %/mA V dB ppm/°C uVrms V V NJM2880 ■ TYPICAL APPLICATION ① In the case where ON/OFF Control is not required: VIN VIN VOUT VOUT 1.0uF OR 2.2uF(Vo<2.6V) (Ceramic Capacitor) 0.1uF R (0~300kΩ ) CONTROL NOISE BYPASS Cp=0.01uF GND 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”. ② In use of ON/OFF CONTROL: VIN VIN VOUT VOUT 1.0uF OR 2.2uF(Vo<2.6V) (Ceramic Capacitor) 0.1uF R CONTROL NOISE BYPASS Cp=0.01uF GND 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. NJM2880 [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.