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| NJM2842 Very Low Output Low Dropout Regulator GENERAL DESCRIPTION The NJM2842 is a very low output voltage, low drop out regulators. It delivers up to 1A output current with the output voltage of 0.8 to 1.8V. The use of an external bias voltage can improve the transient response and the ripple rejection characteristics while maintaining minimum input to output voltage. PACKAGE OUTLINE NJM2842U2 NJM2842KH1 FEATURES * Output Voltage Range 0.8V to 1.8V * High Ripple Rejection 91 dB typ.( VO=1.2V) * Output Noise Voltage VNO=44 Vrms * Output Current IO(max)=1.0A * High Precision Output VO1.0% * Dual Supply Voltage Type VIN, VBIAS (sequence free) * High Stability for Load 0.002%/mA (max) * Output Capacitor with 4.7F ceramic capacitor (VO>1.0V) * Low Dropout Voltage 0.2V typ. @IO=600mA * ON/OFF Control * Built-in Thermal Overload Protection and Short Circuit Current Limit Protection * Bipolar Technology * Package Outline SOT-89-5, ESON6-H1, TO252-5 PIN CONNECTION 5 2 4 6 5 4 1 2 3 NJM2842DL3 1 2 3 1. CONTROL 2. GND 3. VOUT 4. VIN 5.VBIAS 1 2 3 6 5 4 Exposed Pad Connected to GND 1. VOUT 2. VBIAS 3. N.C. 4. CONTROL 5. GND 6. VIN 3 1. CONTROL 2. VOUT 3. GND 4. VIN 5.VBIAS NJM2842DL3 12345 NJM2842U2 NJM2842KH1 BLOCK DIAGRAM VIN VBIAS Thermal Protection Bandgap Reference VOUT CONTROL Over Current Protection GND Ver.2011-02-18 -1- NJM2842 OUTPUT VOLTAGE RANK Device Name SOT-89-5 NJM2842U2-008 NJM2842U2-010 NJM2842U2-012 NJM2842U2-015 NJM2842U2-018 V out 0.8V 1.0V 1.2V 1.5V 1.8V Device Name ESON6-H1 NJM2842KH1-008 NJM2842KH1-010 NJM2842KH1-012 NJM2842KH1-015 NJM2842KH1-018 V out 0.8V 1.0V 1.2V 1.5V 1.8V Device Name TO252-5 NJM2842DL3-012 V out 1.2V Available Fixed Output Voltage Setting Range: 0.8V to 1.8V ABABSOLUTE MAXIMUM RATINGS PARAMETER SYNBOL Input Voltage VIN Bias Voltage VBIAS Control Voltage VCONT SOT-89-5 Power Dissipation PD TO252-5 ESON6-H1 Operating Temperature Storage Temperature Topr Tstg RATINGS +7 +7 +7 625 (*1) 2400 (*2) 1190(*1) 3125(*2) 440 (*3) 1200 (*4) (Ta=25C) UNIT V V V mW -40+85 C -50+150 C (*1): Mounted on glass epoxy board. (76.2x 114.3x1.6mm:EIA/JDEC standard size, 2Layers, copper area 100mm2) (*2): Mounted on glass epoxy board. (76.2x 114.3x1.6mm:EIA/JDEC standard size, 4Layers) (4Layers inner foil : 74.2 x 74.2mm Applying a thermal via hall to a board based on JEDEC standard JESD51-5) (*3): Mounted on glass epoxy board based on EIA/JEDEC. (101.5x 114.57x1.6mm, 2Layers, Use the Exposed Pad) (*4): Mounted on glass epoxy board based on EIA/JEDEC. (101.5x 114.57x1.6mm, 4Layers, Use the Exposed Pad) (4 Layers, Internal foil area: 99.5x99.5mm, Based on JEDEC Standard JESD51-5, used a Thermal Via Hole) BIAS VOLTAGE INPUT RANGE VBIAS= +2.5V to +5.5V (VO<1.5V) VBIAS= +VO+1V to +5.5V (VO1.5V) -2- Ver.2011-02-18 NJM2842 ELECTRICAL CHARACTERISTICS (VBIAS=2.5V(Vo1.5V: VBIAS=VO+1V), VIN=Vo+1V, CBIAS=0.1F, CIN=4.7F, CO=4.7F, Ta=25C) PARAMETER Output Voltage Unloaded Bias Current Unloaded Input Current Bias Current at Control OFF Input Current at Control OFF Output Current Line Regulation 1 (VBIAS) Line Regulation 2 (VIN) Load Regulation Dropout Voltage Ripple Rejection Ratio 1 (VBIAS) Ripple Rejection Ratio 2 (VIN) Average Temperature Coefficient of Output Voltage Output Noise Voltage Control Current Control Voltage for ON-state Control Voltage for OFF-state Bias Voltage Input Voltage * Table1 Voltage Rank 0.8V 1.0V 1.2V 1.5V 1.8V SYMBOL VO IBIAS IIN IBIAS(OFF) IIN(OFF) IO VO/VBIAS VO/VIN VO/IO VI-O TEST CONDITION IO=30mA IO=0mA, except ICONT IO=0mA, except ICONT VCONT=0V VCONT=0V VO x 0.9V VBIAS=2.5V to VO+5.5V(VO<1.5V) VBIAS=VO+1V to VO+5.5V(VO1.5V) IO=30mA VIN=VO+1V to VO+5.5V, IO=30mA MIN. -1.0% 1000 - TYP. 300 1700 0.10 MAX. +1.0% 500 20 100 100 0.10 0.10 0.002 0.18 UNIT V A A nA nA mA %/V %/V %/mA V dB dB IO=30 to 500mA IO=600mA VBIAS=3.5V, RR1(VBIAS) ebias=200mVrms, f=1kHz, IO=10mA ebias=200mVrms, f=1kHz, RR2(VIN) IO=10mA VO/Ta VNO ICONT ICONT(ON) VCONT(ON) VBIAS VIN Ta=0 to +85C, IO=10mA f=10Hz to 80kHz, IO=10mA VCONT=1.6V Refer to Table 1 Refer to Table 1 50 - ppm/C Vrms A V V V V Refer to Table 1 3 12 1.6 0.6 5.5 5.5 MIN. - RR1(VBIAS) TYP. MAX. 77 75 73 71 70 - UNIT MIN. - RR2(VIN) TYP. MAX. 93 92 91 90 89 - UNIT MIN. - dB TYP. 34 38 44 47 51 VNO MAX. - UNIT Vrms Ver.2011-02-18 -3- NJM2842 TEST CIRCUIT IBIAS IIN A VBIAS VBIAS VIN A 0.1F 0.1F ICONT NJM2842 VIN A V VCONT CONTROL GND VOUT (*3) 4.7F (Ceramic) IOUT V VOUT (*3) Vo1.0V version: Co=4.7F (Ceramic) TYPICAL APPLICATION a) In case of where ON/OFF control is not required: VBIAS 0.1F VBIAS VIN VIN 0.1F NJM2842 R CONTROL GND VOUT VOUT (*4) 4.7F (*4) Vo1.0V version: Co=4.7F You shall connect control terminal to VBIAS terminal. Though the ICONT decreases by inserting "R" to between Control terminal and VBIAS terminal, the minimum operating voltage is increased due to the resister "R". -4- Ver.2011-02-18 NJM2842 b) In use of ON/OFF control: VBIAS VBIAS VIN VIN 0.1F R NJM2842 0.1F CONTROL GND VOUT VOUT (*4) 4.7F (*4) Vo1.0V version: Co=2.2F State of control terminal: "H" output is enabled. "L" or "open" output is disabled. *Regarding a Bias Capacitance (CBIAS) and an Input Capacitance (CIN) CBIAS and CIN have the effect that prevents the oscillation at the time of the following condition. When Source impedance is high. When VIN and/or GND line is long. Therefore, you shall connect the CBIAS and CIN that recommendation value or larger (CBIAS 0.1F, CIN0.1F) so that lines that VBIAS-GND and VIN-GND become as short as possible. *Output Capacitance Co Output capacitor (Co) will be required for a phase compensation of the internal error amplifier. The capacitance and the equivalent series resistance (ESR) influence to stable operation of the regulator. This product is designed to work with a low ESR capacitor (Co). However use of recommended capacitance or larger value is effective for stable operation. Use of a smaller Co may cause excess output noise or oscillation of the regulator due to lack of the phase compensation. Therefore use Co with the recommended capacitance or larger value and connect between Vo terminal and GND terminal with shortest path. The recommended capacitance depends on the output voltage rank. Low voltage regulator requires larger value Co. Thus, check the recommended capacitance for each output voltage rank. Use of a larger Co reduces output noise and ripple output, and also improves output transient response a gainst rapid load change. Ver.2011-02-18 -5- NJM2842 TYPICAL CHARACTERICTICS 1.5 NJM2842_1.2V Output Voltage vs. Input Voltage @:Ta=25 C VBIAS=CNT=2.5V Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Io=0A o 1.5 NJM2842_1.2V Output Voltage vs. Input Voltage 1.4 1.3 1 Io=0A 1.2 1.1 Io=100mA 1 Io=500mA 0.9 Io=800mA 0.8 Io=1000mA 0.7 0.8 0.5 @:Ta=25 C VIN=2.2V Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) 0 0 0.5 1 1.5 2 2.5 3 o 1 1.2 1.4 1.6 1.8 2 2.2 Input Voltage : V IN(V) Input Voltage : V BIAS(V) NJM2842_1.2V Output Voltage vs. Output Current 1.4 NJM2842_1.2V Ground Pin Current vs. Output Current 1 @:Ta=25 C VIN=2.2V CNT=Vbias=2.5V Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) o 1.2 0.8 1 Output Voltage:Vo(Vo) 25 C 0.8 150 C -50 C 0.6 0.6 0.4 0.4 @:Vin=2.2V Vbias=Vcont=2.5V Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 0.2 0.2 0 0 500 1000 1500 2000 2500 Output Current:Io(mA) 0 0 200 400 600 800 1000 1200 Output Current : Io(mA) NJM2842_1.2V Control Current vs. Control Voltage 20 @:Ta=25 C VIN=2.2V VBIAS=2.5V Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Io=0mA o NJM2842_1.2V Output Voltage vs. Control Voltage 1.5 15 Rc=0 1 Rc=0 Rc=50k 10 Rc=50k 0.5 5 Rc=100k Rc=100k @:Ta=25 C VIN=2.2V VBIAS=2.5V Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Io=0mA o 0 0 0.5 1 1.5 2 2.5 3 0 0 0.5 1 1.5 2 2.5 3 Control Voltage : Vcont(V) Control Voltage : Vcont(V) -6- Ver.2011-02-18 NJM2842 NJM2842_1.2V Load Regulation vs. Output Current 0 3000 NJM2842_1.2V Peak Output Current vs. Input Voltage 2500 -10 2000 -20 1500 -30 1000 @:Ta=25 C VBIAS=2.5V Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) o -40 @:Ta=25 C Vin=2.2V Vbias=2.5V Cin=Co=4.7uF(Ceramic) Cbias=1uF(Ceramic) 0 250 500 750 1000 1250 1500 o 500 -50 0 0 1 2 3 4 5 6 7 Output Current : Io(mA) Input Voltage : V IN(V) NJM2842_1.2V Quiescent Current v.s. Input Voltage 10 @:Ta=25 C Vbias=CNT=2.5V Output is open. Cin=Co=4.7uF(Ceramic) Cbias=0.1uF (Ceramic) o NJM2842_1.2V Quiescent Current v.s. Input Voltage 1000 @:Ta=25 C Vin=2.2V Vcnt=1.6V Output is open. Cin=Co=4.7uF(Ceramic) Cbias=0.1uF (Ceramic) o 8 800 6 600 4 400 2 200 0 0 1 2 3 4 5 6 7 0 0 1 2 3 4 5 6 7 Input Voltage : V IN(V) Input Voltage : V BIAS(V) NJM2842_1.2V Dropout Voltage vs. Output Current 0.8 @:Ta=25 C Vbias=2.5V Cin=Co=4.7uF(Ceramic) Cbias=1uF(Ceramic) o 100 NJM2842_1.2V Output Noise Voltage vs. Output Current @:Ta=25 C VIN=2.2V VBIAS=CNT=2.5V Cin=Co=4.7uF Cbias=0.1uF o 0.7 80 0.6 0.5 60 0.4 0.3 40 0.2 20 0.1 0 0 200 400 600 800 1000 1200 Output Current:Io(mA) 0 0.001 0.01 0.1 1 10 100 1000 Output Current : Io(mA) Ver.2011-02-18 -7- NJM2842 NJM2842_1.2V Ripple Rejection Ratio v.s. Frequency 120 100 NJM2842_1.2V Ripple Rejection(Vbias-Vout) vs. Output Current 90 f=1KHz 100 Io=0mA Io=10mA Io=100mA 80 60 f=10KHz @:Ta=25 C VIN=2.2V VBIAS=3.5V ein=200mVrms Cin=0.1uF(Ceramic) Cbias=4.7uF(Ceramic) Co=4.7uF(Ceramic) 0.01 0.1 1 10 100 1000 o Io=500mA Io=1000mA 80 70 60 40 @:Ta=25 C Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) VIN=2.2V VBIAS=3.5V ebias=200mVrms o 50 40 30 10 100 1K 10K 100K 20 0.001 Frequency : f (Hz) Output Current : Io(mA) NJM2842_1.2V Ripple Rejection(Vin-Vout) vs. Output Current 100 NJM2842_1.2V Equivalent Serise Resistance vs. Output Current 100 @:Cbias=0.1uF(Ceramic) Cin=4.7uF(Ceramic) Co=4.7uF(Ceramic) VIN=1.3V-5.5V VBIAS=2.5V-5.5V 10 90 f=1KHz 80 70 f=10KHz 60 1 STABLE REGION 50 @:Ta=25 C VIN=2.2V VBIAS=2.5V ein=200mVrms Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 0.01 0.1 1 10 100 1000 o 40 0.1 30 20 0.001 0.01 0.001 0.01 0.1 1 10 100 10 3 Output Current : Io(mA) Output Current : Io(mA) NJM2842_1.2V Control Voltage vs.Temperature 2 NJM2842_1.2V Output Voltage vs.Temperature 1.25 Control Voltage:Vcont(off) (V) 1.5 Output Voltage Vo (Vo) 1.225 1 1.2 0.5 @:Vin=2.2V Vbias=2.5V Io=30mA Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 1.175 @:Vbias=Vcont=2.5V Vin=2.2V Io=30mA Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 0 -50 0 50 Temperature Ta(C) 100 150 1.15 -50 0 50 Temperature Ta(C) 100 150 -8- Ver.2011-02-18 NJM2842 NJM2842_1.2V Peak Output Current vs.Temperature 3000 NJM2842_1.2V Quiescent Current vs.Temperature 500 2400 400 Quiescent Current:Iq(uA) Peak Output Current:Imax(mA) 1800 300 1200 @:Vo*0.9 Vin=2.2V Vbias=Vcont=2.5V Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 200 @:Vbias=Vcont=2.5V Vin=2.2V Output is open Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 600 100 0 -50 0 50 Temperature Ta(C) 100 150 0 -50 0 50 Temperature Ta(C) 100 150 NJM2842_1.2V Line Regulation(VIN) vs.Temperatture 0.2 0.2 NJM2842_1.2V Line Regulation(VBIAS) v s.Temperatture Line Regulation:dVo/dIo(%/V) 0.1 Line Regulation:dVo/dIo(%/V) 0.1 0 0 -0.1 @:dVin=2.2-5.5V Vbias=Vcont=2.5V Io=30mA Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) -0.1 @:dVbias=2.5-5.5V Vin=2.2V Vcont=2.5V Io=30mA Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) -0.2 -50 0 50 Temperature Ta(C) 100 150 -0.2 -50 0 50 Temperature Ta(C) 100 150 NJM2842_1.2V Load Regulation v s.Temperatture NJM2842_1.2V Output Voltage v s.Temperature 0.01 @:Vin=2.2V Vbias=Vcont=2.5V Io=30-1000mA Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 1.5 1.3 0.008 Load Regulation:dVo/dIo(%/mA) 1.1 Output Voltage Vo (Vo) 0.006 0.9 0.7 0.004 0.5 0.3 0.002 0.1 @:Vbias=Vcont=2.5V Vin=2.2V Io=30mA Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 0 -50 0 50 Temperature Ta(C) 100 150 -0.1 -50 0 50 100 150 200 Temperature Ta(C) Ver.2011-02-18 -9- NJM2842 NM2842_1.2V Short Circuit Current vs.Temperature 2000 NJM2842_1.2V ON/OFF Transient Response Without Load 3.5 3 Control Voltage 4 2 0 @:Ta=25C VIN=2.2V VBIAS=2.5V Co=4.7uF Io=0mA -2 -4 -6 -8 Output Voltage Output Voltage:Vo(V) Short Circuit Current:Isc(mA) 1500 2.5 2 1.5 1 0.5 0 -0.5 1000 500 @:Vin=2.2V Vbias=Vcont=2.5V Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) -10 -12 0 -50 0 50 Temperature Ta(C) 100 150 0 2 4 6 8 10 Time:t(s) NJM2842_1.2V ON/OFF Transient Response 3.5 3 Control Voltage NJM2842_1.2V Load transient Response 4 2 1.45 1.40 1500 1000 500 0 -500 -1000 Output Voltage Control Voltage:Vcont(V) 2.5 2 1.5 1 0.5 0 -0.5 Output Voltage 0 Output Voltage:Vo(V) 1.35 1.30 1.25 1.20 1.15 1.10 1.05 @:Ta=25C VIN=2.2V VBIAS=2.5V Co=4.7uF Io=30mA Output Current -2 -4 -6 -8 -10 -12 @:Ta=25C VIN=2.2V VBIAS=2.5V Co=4.7uF Io=500120 160 200 -1500 -2000 -2500 0 4 8 12 16 20 0 40 80 Time:t(ms) Time:t(s) 1.32 NJM2842_1.2V Line transient Response(Vbias Fixed) 5 Input Voltage 1.32 NJM2842_1.2V Line transient Response(Vin Fixed) 6 1.30 4 1.30 Output Voltage:Vo(V) Output Voltage:Vo(V) Input Voltage:Vin(V) 1.28 1.26 1.24 1.22 1.20 1.18 1.16 3 2 Input Voltage 1.26 1.24 1.22 Output Voltage 3 2 1 0 -1 -2 @:Ta=25C Vcont=VBIAS=2.5V Co=4.7uF Io=30mA Output Voltage 1 0 -1 -2 -3 1.20 1.18 1.16 0 0.4 0.8 1.2 1.6 2 0 0.4 0.8 1.2 1.6 2 Time:t(ms) Time:t(ms) - 10 - Ver.2011-02-18 Input Voltage:Vin(V) 1.28 @:Ta=25C VIN=2.2V Co=4.7uF Io=30mA 5 4 Output Current:Io(mA) Output Voltage:Vo(V) Control Voltage:Vcont(V) NJM2842 [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. Ver.2011-02-18 - 11 - |
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