NJM2898 2ch ULTRA LOW NOISE LOW DROPOUT VOLTAGE REGULATOR GENERAL DESCRIPTION The NJM2898 is a 2ch ultra low noise low dropout voltage regulator designed for VCO Applications. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. PACKAGE OUTLINE NJM2898PB1 FEATURES High Ripple Rejection Output Noise Voltage 75dB typ. (f=1kHz,Vo=3V Version) Vno=19µVrms typ. (Cp=0.01µF, Co=1.0µF(Ceramic)) Vno=12µVrms typ. (Cp=0.1µF, Co=10µF(Tantalum)) Output capacitor with 1.0uF ceramic capacitor Output Current Io(max.)=100mA × 2ch High Precision Output Vo±1.0% 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 FFP12-B1 (2.0×2.0×0.85mm) PIN CONFIGURATION 9 8 7 7 8 9 10 6 6 10 11 5 5 11 12 4 4 12 2 1 3 3 TOP 2 PIN FUNCTION 1. VOUT2 2. VOUT2 3. GND 4. CONTROL2 5. VIN2 6. VIN1 7. CONTROL1 8. VOUT1 9. VOUT1 10. NOISE BYPASS1 11. NC 12. NOISE BYPASS2 1 UNDER NJM2898PB1 EQUIVALENT CIRCUIT VIN 1/VIN2 VOUT1/V OUT2 Control1/ Control2 Thermal Protection Bandgap Reference Noise Bypass1/ Noise Bypass2 GND Ver.2004-12-22 -1- NJM2898 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(*1) V 350(*2) mW -40 ∼ +85 °C -40 ∼ +125 °C (*1): When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage. (*2): Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers) ELECTRICAL CHARACTERISTICS (1CH/2CH: VIN=Vo+1V, CIN=0.1µF, Co=1.0uF: Vo≥2.7V (Co=2.2uF: Vo≤2.6V), Cp=0.01µF, Ta=25°C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. Output Voltage Vo Io=30mA -1.0% − Quiescent Current IQ Io=0mA, except Icont, per 1ch 120 − Quiescent Current VCONT=0V, per 1ch IQ(OFF) − − at Control OFF Output Current Io 100 130 Vo−0.3V Line Regulation ∆Vo/∆VIN VIN=Vo+1V ∼ Vo+6V, Io=30mA − − Load Regulation ∆Vo/∆Io Io=0 ∼ 100mA − − Io=60mA 0.10 Dropout Voltage ∆VI−O − ein=200mVrms,f=1kHz, Io=10mA, Ripple Rejection RR 75 − Vo=3V Version Average Temperature Coefficient of Output ∆Vo/∆Ta Ta=0 ∼ 85°C, Io=10mA ± 50 − Voltage f=10Hz ∼ 80kHz, Io=10mA, Cp=0.01µF, Output Noise Voltage1 VNO1 19 − Co=1.0µF(Ceramic), Vo=3V Version f=10Hz ∼ 80kHz, Io=10mA, Cp=0.1µF, Output Noise Voltage2 VNO2 12 Co=10µF(Tantalum), Vo=3V Version Control Voltage for 1.6 VCONT(ON) − ON-state Control Voltage for VCONT(OFF) − − OFF-state 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. MAX. +1.0% 180 UNIT V µA 100 nA 0.10 0.03 0.18 mA %/V %/mA V − dB − ppm/°C − µVrms µVrms − V 0.6 V OUTPUT VOLTAGE RANK LIST Device Name NJM2898PB1-2828 NJM2898PB1-JJ NJM2898PB1-0303 NJM2898PB1-0521 -2- VOUT CH1 2.8V 2.85V 3.0V 5.0V CH2 2.8V 2.85V 3.0V 2.1V Ver.2004-12-22 NJM2898 TEST CIRCUIT A I CONT1 *note1 1.0µF V VOUT1 V IOUT1 VCONT1 VOUT1 VOUT1 CONTROL1 NOISE BYPASS1 A VIN1 IIN1 VIN1 0.1µF Cp=0.01µF NJM2898 NC A VIN2 IIN2 VIN2 0.1µF NOISE BYPASS2 CONTROL2 Cp=0.01µF VOUT2 VOUT2 GND A I CONT2 V VCONT2 1.0µF*3 (ceramic) V VOUT2 IOUT2 *3 Vo≤2.6V version: Co=2.2µF(ceramic) Ver.2004-12-22 -3- NJM2898 TYPICAL APPLICATION 1 In the case where ON/OFF Control is not required: VOUT1 1.0µF*note1 VOUT1 VOUT1 R CONTROL1 (0 ∼ 300kΩ) NOISE BYPASS1 VIN1 VIN1 Cp=0.01µF 0.1µF NJM2898 NC VIN2 VIN2 R NOISE BYPASS2 0.1µF (0 ∼ 300kΩ) CONTROL2 Cp=0.01µF VOUT2 VOUT2 GND VOUT2 1.0µF*4 *4 Vo≤2.6V version: Co=2.2µF 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”. -4- Ver.2004-12-22 NJM2898 2 In use of ON/OFF CONTROL: VOUT1 1.0µF*note1 R (0 ∼ 300kΩ) VOUT1 VOUT1 CONTROL1 NOISE BYPASS1 VIN1 VIN1 Cp=0.01µF 0.1µF NJM2898 NC VIN2 VIN2 0.1µF NOISE BYPASS2 CONTROL2 R (0 ∼ 300kΩ) Cp=0.01µF VOUT2 VOUT2 GND VOUT2 1.0µF*4 *4 Vo≤2.6V version: Co=2.2µF 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. Ver.2004-12-22 -5- NJM2898 ELECTRICAL CHARACTERISTICS NJM2898_3.0V Output Voltage vs. Output Current NJM2898_3V Output Voltage v.s. Input Voltage 3.2 4 @:Ta=25oC Co=1.0µF(Ceramic) Cp=0.01µF 3.5 3 Output Voltage :Vo [V] Output Voltage :Vo [V] 3.1 Io=0A 3 2.9 Io=30mA 2.5 2 1.5 1 @:Ta=25oC V IN=4V Co=1.0µF(Ceramic) Cp=0.01µF 2.8 0.5 Io=100mA 2.7 0 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 0 50 100 NJM2898_3V Ground Pin Current vs. Output Voltage 200 NJM2898_3.0V Dropout Voltage vs. Output Current 20 0.3 o @:Ta=25 C V IN=4V Co=1.0µF(Ceramic) Cp=0.01µF @:Ta=25oC Co=1.0µF(Ceramic) Cp=0.01µF 0.25 15 Dropout Voltage :dVi-o [V] Ground Pin Current :Ignd [mA] 150 Output Current :Io [mA] Input Voltage :VIN [V] 10 5 0.2 0.15 0.1 0.05 0 0 0 20 40 60 80 100 120 0 20 Output Current :Io [mA] 80 100 120 4 30 @:Ta=25oC V IN=4.0V Co=1.0µF(Ceramic) Cp=0.01µF Io=30mA @:Ta=25 oC VIN=4.0V Co=1.0µF(Ceramic) Cp=0.01µF Io=30mA 3.5 Output Voltage :Vo [V] Control Current :Icont [µ A] 60 NJM2898_3.0V Output Voltage v.s. Control Voltage NJM2898_3.0V Control Current v.s. Control Voltage 25 40 Output Current :Io [mA] 20 Rc=0Ω 15 Rc=50kΩ 10 3 Rc=0Ω 2.5 Rc=50kΩ 2 Rc=100kΩ 1.5 1 5 0.5 Rc=100kΩ 0 0 0 0.5 1 1.5 2 2.5 3 Control Voltage :Vcont [V] -6- 3.5 4 0 0.5 1 1.5 2 2.5 3 Control Voltage :Vcont [V] Ver.2004-12-22 NJM2898 ELECTRICAL CHARACTERISTICS NJM2898_3.0V Peak Output Current vs. Input Voltage NJM2898_3.0V Load Regulation vs. Output Current 0 o @:Ta=25 C Co=1.0µF(Ceramic) Cp=0.01µF 200 Peak Output Current :IoMAX [mA] Load Regulation :dVo/dIo [mV] -10 -20 -30 -40 @:Ta=25 oC VIN=4V Co=1.0µF(Ceramic) Cp=0.01µF 150 100 50 0 -50 0 50 100 4 150 6 NJM2898_3.0V Quiescent Current v.s. Input Voltage 2000 @:Ta=25oC Output is open. Co=1.0µF(Ceramic) Cp=0.01µF including Icont 12 14 @:Ta=25 oC V IN=4V LPF:80kHz Output Noise Voltage :Vn [µ Vrms] Quiescent Current : Iq µ [ A] 10 NJM2898_3V Output Noise Voltage vs. Output Current 100 1600 8 Input Voltage :VIN [V] Output Current :Io [mA] 1200 800 400 80 60 40 Co=1.0µF(Ceramic) Cp=0.01µF 20 Co=10µF(Tant.) Cp=0.1µF 0 0 5 10 0 0.001 15 0.01 0.1 1 10 100 Output Current :Io [mA] Input Voltage :Vin [V] NJM2898_3.0V Ripple Rejection Ratio v.s. Frequency NJM2898_3.0V Ripple Rejection vs. Output Current 100 90 Io=0mA 90 f=10kHz Io=10mA Ripple Rejection : RR (dB) Ripple Rejection Ratio :RR [dB] 80 70 Io=30mA 60 50 40 @:Ta=25 oC V IN=4.0V ein=200mVrms Co=1µF(Ceramic) Cp=0.01µF 30 20 10 10 100 100 70 1k 1000 4 10k 10 100k 105 f=1kHz 60 50 40 30 Frequency :f [Hz] Ver.2004-12-22 80 o @:Ta=25 C V IN=4V ein=200mVrms Co=1.0µF(Ceramic) Cp=0.01µF 20 0.001 0.01 0.1 1 10 100 Output Current : Io(mA) -7- NJM2898 ELECTRICAL CHARACTERISTICS NJM2898_3.0V Equivalent Series Resistance vs. Output Current NJM2898_3.0V Dropout Voltage v.s. Temperature 100 0.3 @:Io=60mA Co=1.0µF(Ceramic) Cp=0.01µF o Equivalent Series Resistance :ESR Ω [] @:Ta=25 C VIN=4V Co=1.0 µF(Ceramic) Cp=0.01µF 0.25 Dropout Voltage :dVi-o [V] 10 STABLE REGION 1 0.1 0.2 0.15 0.1 0.05 0.02 0.001 0 0.01 0.1 1 10 100 -50 0 50 NJM2898_3.0V Output Voltage v.s. Tem perature 3.1 2 @:VIN=4.0V Output is open. Co=1.0µF(Ceramic) Cp=0.01µF @:V IN=4.0V Io=30mA Co=1.0µF(Ceramic) Cp=0.01µF 1.5 3.05 Output Voltage :Vo [V] Control Voltage :Vcont-off [V] 150 Temperature :Ta [ C] NJM2898_3.0V Control Voltage v.s. Temperature 1 3 2.95 0.5 0 2.9 -50 0 50 100 -50 150 0 100 Temperature :Ta [ C] Temperature :Ta [ C] NJM2898_3.0V Quiescent Current v.s. Temperature NJM2898_3.0V Line Regulation v.s. Temperature 150 0.2 300 @:V IN=4.0-9.0V Io=30mA Co=1.0µF(Ceramic) Cp=0.01µF @:V IN=4.0V Output is open. Co=1.0µF(Ceramic) Cp=0.01µF Line Regulation :dVo/dVin [%/V] 250 50 o o Quiescent Current : Iq [µ A] 100 o Output Current :Io [mA] 200 150 100 0.1 0 -0.1 50 0 -50 0 50 100 o Temperature :Ta [ C] -8- 150 -0.2 -50 0 50 100 150 o Temperature :Ta [ C] Ver.2004-12-22 NJM2898 ELECTRICAL CHARACTERISTICS NJM2898_3.0V Output Voltage v.s. Tem perature NJM2898_3.0V Load Regulation v.s. Temperature 3.5 0.03 @:V IN=4.0V Io=0-60mA Co=1.0µF(Ceramic) Cp=0.01µF 3 2.5 Output Voltage :Vo [V] Load Regulation :dVo/dIo [%/mA] 0.025 0.02 0.015 0.01 0.005 2 1.5 1 @:VIN=4.0V Io=30mA Co=1.0µF(Ceramic) Cp=0.01µF 0.5 0 0 -50 0 50 100 -50 150 0 50 o Temperature :Ta [ C] 100 150 200 Temperature :Ta ["C] NJM2898_3.0V Short Circuit Current v.s. Temperature 200 Short Circuit Current :Isc [mA] @:V IN=4.0V Output is short to ground. Co=1.0µF(Ceramic) Cp=0.01µF 150 100 50 0 -50 0 50 100 150 o Temperature :Ta [ C] NJM2898_3V ON/OFF Transient Response NJM2898_3V ON/OFF Transient Response without Load 7 6 15 7 10 6 15 10 Control Voltage 4 0 Output Voltage 3 -5 2 -10 @:VIN=4.0V Co=1µF(Ceramic) Cp=0.01µF Io=0mA 1 0 -1 0 1 2 3 Time : t [S] Ver.2004-12-22 4 5 5 5 4 0 Output Voltage 3 -5 2 -10 -15 1 -20 0 -25 -1 @:VIN=4.0V Co=1µF(Ceramic) Cp=0.01µF Io=0mA Control Voltage : Vo [V] 5 Output Voltage : Vo [V] 5 Control Voltage : Vo [V] Output Voltage : Vo [V] Control Voltage -15 -20 -25 0 4 8 12 16 20 Time : t [mS] -9- NJM2898 ELECTRICAL CHARACTERISTICS NJM2898_3V Load Transient Response NJM2898_3V Line Transient Response 3.12 7 3.1 3.1 6 3.08 150 100 3.06 4 3.04 3 3.02 2 Output Voltage 1 3 @:Co=1µF(Ceramic) Cp=0.01µF Io=30mA 2.98 2.96 0 40 80 120 Time : t [µ µ S] 160 0 -1 200 3.06 50 3.04 0 3.02 -50 3 -100 Output Voltage Output Current : Io [mA] Output Voltage : Vo [V] Input Voltage Output Voltage : Vo [V] 5 3.08 Input Voltage : V IN [V] Output Current -150 2.98 @:VIN=4V Co=1µF(Ceramic) Cp=0.01µF Io=30mA 2.96 2.94 0 40 80 120 160 -200 -250 200 Time : t [µ µ S] [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. - 10 - Ver.2004-12-22