NJM2870 LOW DROPOUT VOLTAGE REGULATOR ■ GENERAL DESCRIPTION The NJM2870 is low dropout voltage regulator designed for cellular phone application. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. ■ PACKAGE OUTLINE NJM2870F ■ FEATURES ●High Ripple Rejection 56dB ≤ RR (DC < f < 60kHz) 66dB typ. (f=100Hz) 60dB typ. (f=1kHz) ●Output Noise Voltage Vno=30µV (Cp=0.01µF) ●Output Current Io(max.)=150mA ●High Precision Output Vo±2% ●Low Dropout Voltage ∆VI-O=0.12V typ. At Io=60mA ●ON/OFF Control (Active High) ●Internal Short Circuit Current Limit ●Internal Thermal Overload Protection ●Bipolar Technology ●Package Outline MTP5 (MTP5:2.8×2.9×1.1) ■ PIN CONFIGURATION 1 PIN FUNCTION 1. CONTROL (Active High) 2. GND 3. NOISE BYPASS 4. VOUT 5. VIN 5 2 3 4 NJM2870F ■ EQUIVALENT CIRCUIT VOUT VIN Cont Thermal Protection Noise Bypass Bandgap Reference GND ■ OUTPUT VOLTAGE RANK LIST Device Name VOUT Device Name NJM2870F285 NJM2870F18 1.8V NJM2870F19 1.9V NJM2870F29 NJM2870F02 2.0V NJM2870F03 NJM2870F21 2.1V NJM2870F31 NJM2870F25 2.5V NJM2870F32 NJM2870F27 2.7V NJM2870F33 NJM2870F28 2.8V NJM2870F34 VOUT 2.85V 2.9V 3.0V 3.1V 3.2V 3.3V 3.4V Device Name NJM2870F35 NJM2870F38 NJM2870F04 NJM2870F45 NJM2870F46 NJM2870F05 VOUT 3.5V 3.8V 4.0V 4.5V 4.6V 5.0V - 1/4 - NJM2870 ■ 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 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=0.1µF, Co=4.7µF, Cp=0.01µF, Ta=25°C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Io=30mA Output Voltage Vo +2% V −2% − Io=0mA, expect Icont Quiescent Current IQ 200 300 µA − Quiescent Current IQ(OFF) VCONT=0V 100 nA − − 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 0.12 0.2 V ∆VI-O Io=60mA − Ripple Rejection ein=200mVrms,f=1kHz, Io=10mA RR 60 dB − − VIN=Vo+2V , Vo=3V Version Average Temperature 0.2 ∆Vo/∆Ta Ta=0∼85°C, Io=10mA mV/°C − − Coefficient of Output Voltage f=10Hz∼80kHz, Io=10mA, Output Noise Voltage VNO 30 µVrms − − Vo=3V Version Control Voltage for ON-state 1.6 VCONT(ON) V − − Control Voltage for OFF-state VCONT(OFF) 0.6 V − − (note 2)Please confirm the specification separately because some parameters depend on output voltage. ■ TEST CIRCUIT A IIN VIN VOUT + VIN 0.1µF A V VCONT ICONT + NJM2870 CONTROL IOUT V VOUT 4.7µF NOISE BYPASS GND Cp=0.01µF - 2/4 - NJM2870 ■ TYPICAL APPLICATION ① In the case where ON/OFF Control is not required: VIN VIN + VOUT VOUT + 0.1µF NJM2870 R (0 ∼ 300kΩ) 4.7µF NOISE CONTROL BYPASS Cp=0.01µF GND Connect control terminal(1Pin) to VIN terminal(5Pin) 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. ② In use of ON/OFF CONTROL: VIN VIN VOUT + VOUT + NJM2870 0.1µF 4.7µF R CONTROL NOISE BYPASS GND Cp=0.01µF 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. - 3/4 - NJM2870 [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. - 4/4 -