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| 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=19Vrms typ. (Cp=0.01F, Co=1.0F(Ceramic)) Vno=12Vrms typ. (Cp=0.1F, Co=10F(Tantalum)) Output capacitor with 1.0uF ceramic capacitor Output Current Io(max.)=100mA x 2ch High Precision Output Vo1.0% 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 (2.0x2.0x0.85mm) PIN CONFIGURATION 9 8 7 7 8 9 10 11 12 10 11 12 1 2 3 6 5 4 6 5 4 3 2 1 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 TOP UNDER NJM2898PB1 EQUIVALENT CIRCUIT VIN 1/VIN2 Control1/ Control2 Bandgap Reference Thermal Protection Noise Bypass1/ Noise Bypass2 VOUT1/V OUT2 GND Ver.2004-12-22 -1- NJM2898 (Ta=25C) 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=0.1F, Co=1.0uF: Vo2.7V (Co=2.2uF: Vo2.6V), Cp=0.01F, Ta=25C) 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 85C, Io=10mA 50 - Voltage f=10Hz 80kHz, Io=10mA, Cp=0.01F, Output Noise Voltage1 VNO1 19 - Co=1.0F(Ceramic), Vo=3V Version f=10Hz 80kHz, Io=10mA, Cp=0.1F, Output Noise Voltage2 VNO2 12 Co=10F(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. OUTPUT VOLTAGE RANK LIST Device Name NJM2898PB1-2828 NJM2898PB1-JJ NJM2898PB1-0303 NJM2898PB1-0521 VOUT CH1 2.8V 2.85V 3.0V 5.0V CH2 2.8V 2.85V 3.0V 2.1V ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Power Dissipation PD Operating Temperature Topr Storage Temperature Tstg MAX. +1.0% 180 100 0.10 0.03 0.18 - - - UNIT V A nA mA %/V %/mA V dB ppm/C Vrms Vrms - 0.6 V V -2- Ver.2004-12-22 NJM2898 TEST CIRCUIT A 1.0F *note1 I CONT1 V VOUT1 IOUT1 V VCONT1 VOUT1 VOUT1 CONTROL1 NOISE BYPASS1 Cp=0.01F VIN1 A 0.1F IIN1 VIN1 NC NJM2898 VIN2 A IIN2 0.1F VIN2 NOISE BYPASS2 CONTROL2 Cp=0.01F VOUT2 VOUT2 GND A I CONT2 V VCONT2 V VOUT2 IOUT2 1.0F*3 (ceramic) *3 Vo2.6V version: Co=2.2F(ceramic) Ver.2004-12-22 -3- NJM2898 TYPICAL APPLICATION 1 In the case where ON/OFF Control is not required: VOUT1 1.0F*note1 VOUT1 VOUT1 CONTROL1 R (0 300k) NOISE BYPASS1 Cp=0.01F VIN1 VIN1 0.1F NC NJM2898 VIN2 VIN2 R NOISE BYPASS2 Cp=0.01F VOUT2 VOUT2 1.0F*4 VOUT2 GND (0 300k) CONTROL2 0.1F *4 Vo2.6V version: Co=2.2F 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 1.0F*note1 R (0 300k) VOUT1 VOUT1 CONTROL1 NOISE BYPASS1 Cp=0.01F VIN1 VIN1 0.1F NC NJM2898 VIN2 VIN2 0.1F NOISE BYPASS2 CONTROL2 Cp=0.01F VOUT2 VOUT2 1.0F*4 VOUT2 GND R (0 300k) *4 Vo2.6V version: Co=2.2F 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_3V Output Voltage v.s. Input Voltage 3.2 @:Ta=25oC Co=1.0F(Ceramic) Cp=0.01F 3.1 4 NJM2898_3.0V Output Voltage vs. Output Current 3.5 Output Voltage :Vo [V] 3 Io=0A 3 Output Voltage :Vo [V] 2.5 2 2.9 Io=30mA 1.5 1 2.8 Io=100mA 2.7 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 0.5 @:Ta=25oC VIN=4V Co=1.0F(Ceramic) Cp=0.01F 0 0 50 100 150 200 Input Voltage :VIN [V] Output Current :Io [mA] NJM2898_3V Ground Pin Current vs. Output Voltage 20 @:Ta=25 C VIN=4V Co=1.0F(Ceramic) Cp=0.01F o NJM2898_3.0V Dropout Voltage vs. Output Current 0.3 @:Ta=25oC Co=1.0F(Ceramic) Cp=0.01F 0.25 Ground Pin Current :Ignd [mA] 15 Dropout Voltage :dVi-o [V] 0 20 40 60 80 100 120 0.2 10 0.15 0.1 5 0.05 0 0 0 20 40 60 80 100 120 Output Current :Io [mA] Output Current :Io [mA] NJM2898_3.0V Control Current v.s. Control Voltage 30 @:Ta=25oC VIN=4.0V Co=1.0F(Ceramic) Cp=0.01F Io=30mA NJM2898_3.0V Output Voltage v.s. Control Voltage 4 @:Ta=25 oC VIN=4.0V Co=1.0F(Ceramic) Cp=0.01F Io=30mA Rc=0 2.5 Rc=50k 2 Rc=100k 1.5 3.5 25 Control Current :Icont [ A] 20 Rc=0 15 Rc=50k 10 Output Voltage :Vo [V] Rc=100k 3 1 5 0.5 0 0 0.5 1 1.5 2 2.5 3 3.5 4 0 0 0.5 1 1.5 2 2.5 3 Control Voltage :Vcont [V] Control Voltage :Vcont [V] -6- Ver.2004-12-22 NJM2898 ELECTRICAL CHARACTERISTICS NJM2898_3.0V Load Regulation vs. Output Current 0 NJM2898_3.0V Peak Output Current vs. Input Voltage o 200 @:Ta=25 C Co=1.0F(Ceramic) Cp=0.01F Peak Output Current :IoMAX [mA] -10 Load Regulation :dVo/dIo [mV] 150 -20 100 -30 50 -40 @:Ta=25 oC VIN=4V Co=1.0F(Ceramic) Cp=0.01F 0 50 100 150 -50 0 4 6 8 10 12 14 Output Current :Io [mA] Input Voltage :VIN [V] NJM2898_3.0V Quiescent Current v.s. Input Voltage 2000 @:Ta=25oC Output is open. Co=1.0F(Ceramic) Cp=0.01F including Icont 100 NJM2898_3V Output Noise Voltage vs. Output Current @:Ta=25 oC VIN=4V LPF:80kHz 1200 Output Noise Voltage :Vn [ Vrms] 1600 80 Quiescent Current : Iq A] [ 60 800 40 Co=1.0F(Ceramic) Cp=0.01F 20 Co=10F(Tant.) Cp=0.1F 400 0 0 5 10 15 0 0.001 0.01 0.1 1 10 100 Input Voltage :Vin [V] Output Current :Io [mA] NJM2898_3.0V Ripple Rejection Ratio v.s. Frequency 90 Io=0mA 100 NJM2898_3.0V Ripple Rejection vs. Output Current 90 80 f=10kHz Ripple Rejection Ratio :RR [dB] Io=10mA 70 Io=30mA 60 Ripple Rejection : RR (dB) 80 70 f=1kHz 60 50 50 40 @:Ta=25 oC VIN=4.0V ein=200mVrms Co=1F(Ceramic) Cp=0.01F 10 10 100 100 1k 1000 10k 104 100k 105 40 30 30 @:Ta=25 C VIN=4V ein=200mVrms Co=1.0F(Ceramic) Cp=0.01F 0.01 0.1 1 10 100 o 20 20 0.001 Frequency :f [Hz] Output Current : Io(mA) Ver.2004-12-22 -7- NJM2898 ELECTRICAL CHARACTERISTICS NJM2898_3.0V Equivalent Series Resistance vs. Output Current 100 @:Ta=25 C VIN=4V Co=1.0 F(Ceramic) Cp=0.01F o NJM2898_3.0V Dropout Voltage v.s. Temperature 0.3 @:Io=60mA Co=1.0F(Ceramic) Cp=0.01F 0.25 Equivalent Series Resistance :ESR ] [ Dropout Voltage :dVi-o [V] 10 100 10 0.2 STABLE REGION 1 0.15 0.1 0.1 0.05 0.02 0.001 0 0.01 0.1 1 -50 0 50 100 o 150 Output Current :Io [mA] Temperature :Ta [ C] NJM2898_3.0V Control Voltage v.s. Temperature 2 @:VIN=4.0V Output is open. Co=1.0F(Ceramic) Cp=0.01F 3.1 NJM2898_3.0V Output Voltage v.s. Tem perature @:VIN=4.0V Io=30mA Co=1.0F(Ceramic) Cp=0.01F 3.05 Control Voltage :Vcont-off [V] 1.5 Output Voltage :Vo [V] 1 3 0.5 2.95 0 -50 0 50 100 o 2.9 150 -50 0 50 100 o 150 Temperature :Ta [ C] Temperature :Ta [ C] NJM2898_3.0V Quiescent Current v.s. Temperature 300 @:VIN=4.0V Output is open. Co=1.0F(Ceramic) Cp=0.01F 0.2 NJM2898_3.0V Line Regulation v.s. Temperature @:VIN=4.0-9.0V Io=30mA Co=1.0F(Ceramic) Cp=0.01F 250 Line Regulation :dVo/dVin [%/V] 0.1 Quiescent Current : Iq [ A] 200 150 0 100 -0.1 50 0 -50 0 50 100 o 150 -0.2 -50 0 50 100 o 150 Temperature :Ta [ C] Temperature :Ta [ C] -8- Ver.2004-12-22 NJM2898 ELECTRICAL CHARACTERISTICS NJM2898_3.0V Load Regulation v.s. Temperature 0.03 @:VIN=4.0V Io=0-60mA Co=1.0F(Ceramic) Cp=0.01F 3.5 NJM2898_3.0V Output Voltage v.s. Tem perature 0.025 3 Load Regulation :dVo/dIo [%/mA] 2.5 0.02 Output Voltage :Vo [V] 2 0.015 1.5 0.01 1 @:VIN=4.0V Io=30mA Co=1.0F(Ceramic) Cp=0.01F 0.005 0.5 0 -50 0 50 100 o 0 150 -50 0 50 100 150 200 Temperature :Ta [ C] Temperature :Ta ["C] NJM2898_3.0V Short Circuit Current v.s. Temperature 200 @:VIN=4.0V Output is short to ground. Co=1.0F(Ceramic) Cp=0.01F Short Circuit Current :Isc [mA] 150 100 50 0 -50 0 50 100 o 150 Temperature :Ta [ C] NJM2898_3V ON/OFF Transient Response without Load 7 15 7 NJM2898_3V ON/OFF Transient Response 15 6 Control Voltage 5 Output Voltage : Vo [V] 10 6 Control Voltage 10 5 Control Voltage : Vo [V] Output Voltage : Vo [V] 5 5 Control Voltage : Vo [V] 4 Output Voltage 3 0 4 Output Voltage 3 0 -5 -5 2 @:VIN=4.0V Co=1F(Ceramic) Cp=0.01F Io=0mA -10 2 @:VIN=4.0V Co=1F(Ceramic) Cp=0.01F Io=0mA -10 1 -15 1 -15 0 -20 0 -20 -1 0 1 2 3 Time : t [S] 4 5 -25 -1 0 4 8 12 Time : t [mS] 16 20 -25 Ver.2004-12-22 -9- NJM2898 ELECTRICAL CHARACTERISTICS NJM2898_3V Line Transient Response 3.12 7 3.1 NJM2898_3V Load Transient Response 150 3.1 6 3.08 Output Current 100 Output Voltage : Vo [V] 3.06 4 Output Voltage : Vo [V] Input Voltage 3.04 0 3.04 3 3.02 -50 3.02 Output Voltage 2 3 Output Voltage -100 3 @:Co=1F(Ceramic) Cp=0.01F Io=30mA 1 2.98 @:VIN=4V Co=1F(Ceramic) Cp=0.01F Io=30mA 0 40 80 120 Time : t [S] 160 -150 2.98 0 2.96 -200 2.96 0 40 80 120 Time : t [S] 160 -1 200 2.94 -250 200 [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 Output Current : Io [mA] Input Voltage : V IN [V] 3.08 5 3.06 50 |
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