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| NJM2887 ADJUSTABLE LOW DROPOUT VOLTAGE REGULATOR GENERAL DESCRIPTION The NJM2887 is an adjustable low dropout voltage regulator with ON/OFF control. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. It is suitable for DVD, FAX and Car Audio. FEATURES High Ripple Rejection 75dB typ. (f=1kHz,Vo=3V Version) Output Noise Voltage Vno=50Vrms typ. Output capacitor with 2.2F ceramic capacitor Output Current Io(max.)=500mA High Precision Output Vref=1.29V1.0% Low Dropout Voltage 0.18V typ. (Io=300mA) ON/OFF Contorol Internal Short Circuit Current Limit Internal Thermal Overload Protection Bipolar Technology Package Outline TO-252-5(DL2,DL3) PIN CONFIGURATION 3 3 PACKAGE OUTLINE NJM2887DL2 NJM2887DL3 12345 12345 PIN FUNCTION 1.CONTROL 2. VIN 3.GND 4.VOUT 5.VADJ NJM2887DL2 EQUIVALENT CIRCUIT NJM2887DL3 VIN Control Bandgap Reference Thermal Protection VOUT VADJ GND Ver.2004-12-24 -1- NJM2887 RATINGS +14 +14(*1) +4 8(Tc=25C) Power Dissipation PD W 0.8(Ta25C) Operating Temperature Topr -40 +85 C Storage Temperature Tstg -40 +125 C (*1): When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage. ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Output Adjust Voltage VADJ (Ta=25C) UNIT V V V ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, R1=100k, CIN=0.33F, Co=2.2F:Vo (Co=4.7F: Vo2.6V), Ta=25C) PARAMETER SYMBOL TEST CONDITION Io=30mA Output Voltage Vo Io=30mA Reference Voltage Vref Quiescent Current Io=0mA,Vo=3.0V IQ Quiescent Current VCONT=0V IQ(OFF) at Control OFF Output Current Io Vo-0.3V Line Regulation Vo/VIN VIN=Vo+1V Vo+6.0V, Io=30mA Load Regulation Vo/Io Io=0 500mA Dropout Voltage(*2) Io=300mA VI-O ein=200mVrms,f=1kHz, Io=10mA Ripple Rejection RR Vo=3.0V Version Average Temperature Coefficient of Output Vo/Ta Ta=085C, Io=10mA Voltage f=10Hz80kHz, Io=10mA, Output Noise Voltage VNO Vo=3.0V Version Control Voltage for VCONT(ON) ON-state Control Voltage for VCONT(OFF) OFF-state (*2): Except output voltage less than 2.1V. MIN. 1.5 1.277 - - 500 - - - - - - 1.6 - TYP. - 1.29 200 - 650 - - 0.18 70 50 50 - - MAX. 6 1.303 300 100 - 0.10 0.03 0.28 - - - - 0.6 UNIT V V A nA mA %/V %/mA V dB ppm/C Vrms V V -2- Ver.2004-12-24 NJM2887 POWER DISSIPATION VS. AMBIENT TEMPERATURE NJU2887DL2 (Topr=-40~+85C,Tj=125C,PD=8W(TC=25C),PD=0.8W(Ta25C)) 10 Power Dissipation PD(W) 8 6 4 2 0 -50 Heat Sink HS=5C/W HS=10C/W HS=20C/W Without Heat Sink -25 0 25 50 75 100 Ambient Temperature Ta(C) TEST CIRCUIT A VIN IIN VIN VO 2.2F*3 R2 (ceramic) 0.33F NJM2887 IOUT V VO A V VCONT ICONT CONTROL VADJ R1 100k GND A IQ *3 Vo2.6V version: Co=4.7F(ceramic) The ceramic capacitor used by the output recommend the B characteristic. Ver.2004-12-24 -3- NJM2887 TYPICAL APPLICATION 1 In the case where ON/OFF Control is not required: VIN 0.33F VIN VO 2.2F R2 *4 VO NJM2887 R (0300k) CONTROL VADJ R1 100k GND *4 Vo2.6V version: Co=4.7F 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 VO 2.2F*4 R2 VO 0.33F R NJM2887 CONTROL VADJ R1 100k GND *4 Vo2.6V version: Co=4.7F State of control terminal: *"H" output is enabled. *"L" or "open" output is disabled. -4- Ver.2004-12-24 NJM2887 3 Reduction of output noise voltage: VIN 0.33F VIN NJM2887 R3 (0~300k) VOUT 2.2F Cp R2 *4 VOUT CONTROL GND VADJ R4 R1 100K *4 Vo2.6V version: Co=4.7F Output feedback resistance: R1, should connect near VADJ terminal. For reduce output noise voltage, connect Cp and R4 refer to the following table. The example of use of Cp and R4 Output capacity value R1=10k Cp=100pF Co=2.2F Cp=680pF Co=4.7F R1=1k Cp=1nF Cp=6.8nF R1=100 Cp=0.01F Cp=0.068F R4 10k or less Ver.2004-12-24 -5- NJM2887 ELECTRICAL CHARACTERISTICS NJM2887_3.0V Output Voltage vs. Input Voltage @:Ta=25 C Co=2.2F(Ceramic) R1=100k R2=132.5k o 3.2 4 NJM2887_3.0V Output Voltage vs. Output Current 3.5 3.1 3 Output Voltage : Vo (V) Output Voltage : Vo(V) Io=0A 3 2.5 2 2.9 1.5 Io=100mA 2.8 Io=300mA 2.7 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 1 0.5 0 0 200 400 @:Ta=25 C VIN=4.0V Co=2.2F(Ceramic) R1=100k R2=132.5k 600 800 1000 o Input Voltage : VIN(V) Output Current : Io(mA) NJM2887_3.0V Ground Pin Current v.s. Output Current 30 @:Ta=25 oC VIN=4.0V Co=2.2F(Ceramic) R1=100k R2=132.5k 0.35 NJM2887_3.0V Dropout Voltage vs. Output Current @:Ta=25oC Co=2.2F(Ceramic) R1=100k R2=132.5k 25 0.3 Ground Pin Current : GND (mA) I 20 Dropout Voltage:dVI-O (V) 0.25 0.2 15 0.15 10 0.1 5 0.05 0 0 100 200 300 400 500 600 700 0 0 100 200 300 400 500 600 700 Output Current : IO(mA) Output Current:Io(mA) 60 NJM2887_3.0V Control Current vs. Control Voltage @:Ta=25oC VIN=4.0V Co=2.2F(Ceramic) Io=30mA R1=100k R2=132.5k 4 NJM2887_3.0V Output Voltage vs. Control Voltage 3.5 Rc=0 50 3 ( A) Output Voltage : Vo(V) 40 Cont 2.5 Rc=50k 2 Rc=100k @:Ta=25 C VIN=4.0V Co=2.2F(Ceramic) Io=30mA R1=100k R2=132.5k 0 0.5 1 1.5 2 Cont o Control Current : I 30 Rc=0 20 Rc=100k 10 Rc=50k 1.5 1 0.5 0 0 0 0.5 1 1.5 2 2.5 Cont 3 3.5 4 2.5 3 Control Voltage : V (V) Control Voltage : V (V) -6- Ver.2004-12-24 NJM2887 ELECTRICAL CHARACTERISTICS NJM2887_3.0V Load Regulation vs. Output Current NJM2887_3.0V Peak Output Current vs. Input Voltage 0 1400 -10 1200 Load Regulation : dVo/dIo (mV) -20 Peak Output Current : Io MAX(mA) 1000 -30 800 -40 600 -50 -60 400 @:Ta=25oC Co=2.2F(Ceramic) R1=100k R2=132.5k 4 6 8 10 12 14 -70 @:Ta=25 oC VIN=4.0V Co=2.2F(Ceramic) R1=100k R2=132.5k 0 100 200 300 400 500 600 700 200 -80 0 Output Current : Io(mA) Input Voltage : VIN(V) NJM2887_3.0V Quiescent Current v.s. Input Voltage 2000 @:Ta=25 oC Output is open. Co=2.2uF(Ceramic) Co=2.2F(Ceramic) VCONT=VIN VCONT=VIN R1=100k R2=132.5k 100 NJM2887_3.0V Output Noise Voltage vs. Output Current @:Ta=25 C VIN=4.0V LPF:80kHz Co=2.2/4.7F Cp=0F R1=100k R2=132.5k o 80 1500 Output Noise Voltage : Vn(Vrms) Quiescent Current : I ( A) Q 60 2.2F 1000 40 500 4.7F 20 0 0 5 10 15 0 0.001 0.01 0.1 1 10 100 1000 Input Voltage : VIN(V) Output Current : Io(mA) NJM2887_3.0V Ripple Rejection Ratio v.s. Frequency 100 Io=0mA 90 100 NJM2887_3.0V Ripple Rejection vs. Output Current 90 f=1kHz Ripple Rejection Ratio : RR (dB) Ripple Rejection : RR (dB) 80 80 70 Io=10mA 70 60 Io=30mA 60 50 @:Ta=25oC VIN=4.0V ein=200mVrms Co=2.2F(Ceramic) R1=100k R2=132.5k 10 100 1000 104 105 50 f=10kHz 40 @:Ta=25oC VIN=4.0V ein=200mVrms Co=2.2F(Ceramic) R1=100k R2=132.5k 0.01 0.1 1 10 100 1000 40 30 30 20 20 0.001 Frequency : f (Hz) Output Current : Io(mA) Ver.2004-12-24 -7- NJM2887 ELECTRICAL CHARACTERISTICS NJM2887_3.0V Equivalent Serise Resistance vs. Output Current 100 @:Ta=25 C Co=2.2F(Ceramic) VIN=4.0V o 0.4 NJM2887_3.0V Dropout Voltage vs. Temperature 0.35 Equivalent Serise Resistance : ESR( ) 10 0.3 Dropout Voltage : dV (V) I-O 0.25 1 STABLE REGION 0.2 0.15 0.1 @:Io=300mA Co=2.2F(Ceramic) 0.1 0.05 0.02 0.001 0.01 0.1 1 10 100 10 3 0 -50 R1=100k R2=132.5k 0 50 100 o 150 Output Current : Io(mA) Temperature : Ta ( C) NJM2887_3.0V Control Voltage v.s. Temperature 2 @:VIN=4.0V Io=30mA CL=2.2F(Ceramic) R1=100k R2=132.5k 3.2 NJM2887_3.0V Output Voltage vs. Temperature Control Voltage :Vcont-off [V] 1.5 3.1 Output Voltage : Vo(V) 1 3 0.5 2.9 @:VIN=4.0V Io=30mA Co=2.2F(Ceramic) 0 2.8 -50 0 50 100 o R1=100k R2=132.5k -50 0 50 100 o 150 150 Temperature : Ta ( C) Temperature : Ta ( C) 1000 NJM2887_3.0V Output Peak Current v.s. Temperature 300 NJM2887_3.0V Quiescent Current v.s. Input Voltage @:VIN=4.0V VCONT=1.6V Output is open. Co=2.2F(Ceramic) R1=100k R2=132.5k Output Peak Current : Io_peak (mA) 800 250 Quiescent Current : Q (mA) I @:VIN=4.0V Co=2.2F(Ceramic) -50 0 50 100 o 200 600 150 400 100 200 50 0 150 0 -50 0 50 Temperature : Ta ( C) Temperature : Ta ( C) o 100 150 -8- Ver.2004-12-24 NJM2887 ELECTRICAL CHARACTERISTICS NJM2887_3.0V Line Regulation vs. Temperature NJM2887_3.0V Load Regulation vs. Temperature @:VIN=4.0V Io=0-500mA Co=2.2F(Ceramic) R1=100k R2=132.5k 0.1 0.03 0.025 Line Regulation : dVo/dIo (%/V) 0.05 Load Regulation : dVo/dIo(%/mA) 50 100 150 0.02 0 0.015 0.01 -0.05 @:VIN=4.0-9.0V Io=30mA Co=2.2F(Ceramic) 0.005 R1=100k R2=132.5k -0.1 -50 0 Temperature : Ta ( C) o 0 -50 0 50 Temperature : Ta ( C) o 100 150 4 NJM2887_3.0V Output Voltage vs. Temperature 400 NJM2887_3.0V Short Circuit Current v.s. Temperature @:VIN=4.0V Co=2.2F(Ceramic) Output is short to ground 3.5 350 Short Circuit Current : Isc (mA) 3 300 R1=100k R2=132.5k Output Voltage : Vo(V) 2.5 250 2 200 1.5 150 1 @:VIN=4.0V Io=30mA Co=2.2F(Ceramic) 100 0.5 50 0 -50 R1=100k R2=132.5k 0 50 100 o 0 150 200 -50 0 50 100 o 150 Temperature : Ta ( C) Temperature : Ta ( C) NJM2887_3.0V ON/OFF Transient Response without Load 16 Control Voltage 14 12 Output Voltage : Vo [V] 10 Output Voltage 8 6 4 2 0 0 1 2 3 Time : t [S] 4 5 @:Ta=25 C VIN=4.0V Co=2.2uF(Ceramic) Io=0mA o NJM2887_3.0V ON/OFF Transient Response 20 10 Control Voltage : Vo [V] 0 -10 -20 -30 -40 -50 -60 7 6 5 Output Voltage : Vo [V] 4 Output Voltage 3 2 1 0 -1 0 1 2 3 Time : t [S] 4 5 @:Ta=25 C VIN=4.0V Co=2.2uF(Ceramic) Io=30mA o 10 Control Voltage 5 0 -5 -10 -15 -20 -25 -30 Ver.2004-12-24 Control Voltage : Vo [V] -9- NJM2887 ELECTRICAL CHARACTERISTICS NJM2887_3.0V Load Transient Response 6 5 Input Voltage Output Voltage : Vo [V] Output Voltage : Vo [V] 3.25 3.2 600 500 400 300 200 100 @:Ta=25 C VIN=4.0V Co=2.2uF(Ceramic) Io=30mA 0 40 80 120 Time : t [S] 160 o NJM2887_3.0V Line Transient Response 3.1 3.08 3.06 3.04 3.02 3 2.98 2.96 2.94 0 40 80 120 Time : t [S] 160 @:Co=2.2uF(Ceramic) Io=30mA 4 3 2 1 0 -1 -2 200 Input Voltage : V [V] 3.15 3.1 3.05 3 2.95 2.9 2.85 Output Voltage Output Voltage 0 -100 -200 200 [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.2004-12-24 Output Current : Io [mA] Output Current IN |
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