NJM2871/A, NJM2872/A LOW DROPOUT VOLTAGE REGULATOR GENERAL DESCRIPTION The NJM2871/A, NJM2872/A are low dropout voltage regulators designed for cellular phone application. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. PACKAGE OUTLINE NJM2871F/AF NJM2872F/AF FEATURES High Ripple Rejection 70dB typ. (f=1kHz) Output Noise Voltage Vno=30Vrms (Cp=0.01F) Output capacitor with 1.0uF ceramic capacitor (Vo2.7V) Output Current Io(max.)=150mA High Precision Output Vo2% Vo1%:A Version Low Dropout Voltage 0.10V typ. (Io=60mA) ON/OFF Control (Active High) Internal Short Circuit Current Limit Internal Thermal Overload Protection Bipolar Technology Package Outline MTP5 (MTP5:2.8x2.9x1.1mm) PIN CONFIGURATION 1 5 2 3 4 NJM2871F/AF PIN FUNCTION 1. CONTROL (Active High) 2. GND 3. NOISE BYPASS 4. VOUT 5. VIN 1 5 2 3 4 NJM2872F/AF PIN FUNCTION 1.VIN 2.GND 3.CONTROL (Active High) 4.NOISE BYPASS 5.VOUT EQUIVALENT CIRCUIT VOUT VIN Cont Thermal Protection Noise Bypass Bandgap Reference GND OUTPUT VOLTAGE RANK LIST Device Name VOUT Device Name 2.1V NJM287xx21 NJM287xx03 2.5V NJM287xx31 NJM287xx25 2.6V NJM287xx26 NJM287xx32 2.7V NJM287xx27 NJM287xx33 2.8V NJM287xx28 NJM287xx34 2.85V NJM287xx285 NJM287xx35 2.9V NJM287xx29 NJM287xx38 VOUT 3.0V 3.1V 3.2V 3.3V 3.4V 3.5V 3.8V Device Name NJM287xx04 NJM287xx05 VOUT 4.0V 5.0V NJM2871/A, NJM2872/A 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 200 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, CIN=0.1F, Co=1.0uF: Vo2.7V (Co=2.2uF: Vo2.6V), Cp=0.01F, Ta=25C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Io=30mA -2% +2% V - Output Voltage Vo Io=30mA, A Version -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 Coefficient of Output 0.2 Vo/Ta Ta=085C, Io=10mA mV/C - - Voltage f=10Hz80kHz, Io=10mA, Output Noise Voltage VNO 30 Vrms - - Vo=3V Version Control Voltage for VCONT(ON) 1.6 V - - ON-state Control Voltage for VCONT(OFF) 0.6 V - - 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 VOUT IOUT VIN 0.1uF A V VCONT ICONT CONTROL GND NOISE BYPASS 1.0uF OR 2.2uF(Vo2.6V) (ceramic) Cp=0.01uF V VOUT NJM2871/A, NJM2872/A TYPICAL APPLICATION In case that ON/OFF Control is not required: VIN VIN VOUT VOUT 1.0uF OR 2.2uF(Vo2.6V) (ceramic) 0.1uF R (0300k) NOISE BYPASS CONTROL 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". In use of ON/OFF CONTROL: VIN VIN VOUT VOUT 1.0uF OR 2.2uF(Vo2.6V) (ceramic) 0.1uF R CONTROL NOISE BYPASS GND Cp=0.01uF 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. NJM2871/A, NJM2872/A ELECTRICAL CHARACTERISTICS NJM2871/A, NJM2872/A ELECTRICAL CHARACTERISTICS NJM2871/A, NJM2872/A ELECTRICAL CHARACTERISTICS NJM2871/A, NJM2872/A [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.