NJM2842 Very Low Output Low Dropout Regulator GENERAL DESCRIPTION PACKAGE OUTLINE 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 NJM2842U2 NJM2842KH1 while maintaining minimum input to output voltage. FEATURES • Output Voltage Range 0.8V to 1.8V • High Ripple Rejection 91 dB typ.( VO=1.2V) • Output Noise Voltage VNO=44 µVrms • Output Current IO(max)=1.0A • High Precision Output VO±1.0% • Dual Supply Voltage Type VIN, VBIAS (sequence free) • High Stability for Load 0.002%/mA (max) • Output Capacitor with 4.7µF 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 NJM2842DL3 PIN CONNECTION 5 1 2 2 4 3 6 5 4 1 2 3 1. CONTROL 2. GND 3. VOUT 4. VIN 5.VBIAS 1 2 3 6 NJM2842KH1 NJM2842U2 5 Exposed Pad 4 1. VOUT 2. VBIAS 3. N.C. 4. CONTROL 5. GND 6. VIN （Connected to GND） 3 1. CONTROL 2. VOUT 3. GND 4. VIN 5.VBIAS 12 3 4 5 NJM2842DL3 BLOCK DIAGRAM VOUT VIN VBIAS Thermal Protection CONTROL Bandgap Reference 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 RATINGS +7 +7 +7 SOT-89-5 Power Dissipation PD (Ta=25°C) UNIT V V V TO252-5 ESON6-H1 625 (*1) 2400 (*2) 1190(*1) 3125(*2) 440 (*3) 1200 (*4) 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: 99.5×99.5mm, Based on JEDEC Standard JESD51-5, used a Thermal Via Hole) Operating Temperature Storage Temperature Topr Tstg BIAS VOLTAGE INPUT RANGE VBIAS= +2.5V to +5.5V (VO<1.5V) VBIAS= +VO+1V to +5.5V (VO≥1.5V) -2- Ver.2011-02-18 NJM2842 ELECTRICAL CHARACTERISTICS (VBIAS=2.5V(Vo≥1.5V: VBIAS=VO+1V), VIN=Vo+1V, CBIAS=0.1µF, CIN=4.7µF, CO=4.7µF, Ta=25˚C) 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 MIN. 0.8V 1.0V 1.2V 1.5V 1.8V - Ver.2011-02-18 RR1(VBIAS) TYP. MAX. 77 75 73 71 70 - 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 × 0.9V VBIAS=2.5V to VO+5.5V(VO<1.5V) VBIAS=VO+1V to VO+5.5V(VO≥1.5V) IO=30mA VIN=VO+1V to VO+5.5V, IO=30mA 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 f=10Hz to 80kHz, IO=10mA VCONT=1.6V MIN. - RR2(VIN) TYP. MAX. 93 92 91 90 89 - TYP. MAX. UNIT -1.0% 1000 300 1700 +1.0% 500 20 100 100 - V µA µA nA nA mA - - 0.10 %/V - 0.10 0.10 0.002 0.18 %/V %/mA V Refer to Table 1 dB Refer to Table 1 dB ±50 - Ta=0 to +85°C, IO=10mA ICONT(ON) VCONT(ON) VBIAS VIN UNIT MIN. - ppm/°C µVrms µA V V V V Refer to Table 1 3 12 1.6 0.6 5.5 5.5 UNIT MIN. dB - TYP. 34 38 44 47 51 VNO MAX. - UNIT µVrms -3- NJM2842 TEST CIRCUIT A IBIAS VBIAS NJM2842 0.1µF A ICONT A VIN VBIAS CONTROL VIN 0.1µF VOUT (*3) 4.7µF GND V VCONT IIN (Ceramic) IOUT V VOUT (*3) Vo≤1.0V version: Co=4.7µF (Ceramic) TYPICAL APPLICATION a) In case of where ON/OFF control is not required: VBIAS VBIAS VIN VIN 0.1µF 0.1µF NJM2842 R CONTROL GND VOUT VOUT (*4) 4.7µF (*4) Vo≤1.0V version: Co=4.7µF 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 NJM2842 0.1µF VIN VIN 0.1µF R CONTROL GND VOUT VOUT (*4) 4.7µF (*4) Vo≤1.0V version: Co=2.2µF 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 ≥0.1µF, CIN≥0.1µF) 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 NJM2842_1.2V Output Voltage vs. Input Voltage 1.5 NJM2842_1.2V Output Voltage vs. Input Voltage 1.5 o @:Ta=25 C VBIAS=CNT=2.5V Cin=Co=4.7uF (Ceramic) Cbias=0.1uF(Ceramic) 1.4 1.3 Io=0A 1 1.2 Io=0A 1.1 Io=100mA 1 0.5 Io=500mA 0.9 o @:Ta=25 C VIN=2.2V Cin=Co=4.7uF (Ceramic) Cbias=0.1uF(Ceramic) Io=800mA 0.8 Io=1000mA 0.7 0.8 0 1 1.2 1.4 1.6 1.8 2 0 2.2 0.5 1 1.5 2 2.5 3 Input Voltage : V BIAS(V) Input Voltage : V IN(V) NJM2842_1.2V Ground Pin Current vs. Output Current NJM2842_1.2V Output Voltage vs. Output Current 1 1.4 o @:Ta=25 C VIN=2.2V CNT=Vbias=2.5V Cin=Co=4.7uF (Ceramic) Cbias=0.1uF(Ceramic) 1.2 0.8 Output Voltage:Vo(Vo) 1 25˚ C 0.6 0.8 -50˚ C 150˚ C 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 0 2500 0 200 400 Output Current:Io(mA) 600 800 1000 1200 Output Current : Io(mA) NJM2842_1.2V Control Current vs. Control Voltage NJM2842_1.2V Output Voltage vs. Control Voltage 20 1.5 o @:Ta=25 C VIN=2.2V VBIAS=2.5V Cin=Co=4.7uF (Ceramic) Cbias=0.1uF(Ceramic) Io=0mA 15 Rc=0Ω 1 Rc=0Ω Rc=50kΩ 10 Rc=50kΩ Rc=100kΩ 0.5 o @:Ta=25 C VIN=2.2V VBIAS=2.5V Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Io=0mA 5 Rc=100kΩ 0 0 0.5 1 1.5 2 Control Voltage : Vcont(V) 2.5 3 0 0 0.5 1 1.5 2 2.5 3 Control Voltage : Vcont(V) -6- Ver.2011-02-18 NJM2842 NJM2842_1.2V Load Regulation vs. Output Current NJM2842_1.2V Peak Output Current vs. Input Voltage 0 3000 2500 -10 2000 -20 1500 -30 1000 o @:Ta=25 C VBIAS=2.5V Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) o @:Ta=25 C Vin=2.2V Vbias=2.5V Cin=Co=4.7uF(Ceramic) Cbias=1uF(Ceramic) -40 500 0 -50 0 250 500 750 1000 1250 0 1500 1 2 3 4 5 6 7 Input Voltage : V IN(V) Output Current : Io(mA) NJM2842_1.2V Quiescent Current v.s. Input Voltage NJM2842_1.2V Quiescent Current v.s. Input Voltage 10 1000 o o @:Ta=25 C Vbias=CNT=2.5V Output is open. Cin=Co=4.7uF(Ceramic) Cbias=0.1uF (Ceramic) 8 @:Ta=25 C Vin=2.2V Vcnt=1.6V Output is open. Cin=Co=4.7uF(Ceramic) Cbias=0.1uF (Ceramic) 800 6 600 4 400 2 200 0 0 0 1 2 3 4 5 6 7 0 1 2 Input Voltage : V IN(V) 3 4 5 6 7 Input Voltage : V BIAS(V) NJM2842_1.2V Dropout Voltage vs. Output Current 0.8 100 NJM2842_1.2V Output Noise Voltage vs. Output Current o @:Ta=25 C Vbias=2.5V Cin=Co=4.7uF(Ceramic) Cbias=1uF(Ceramic) 0.7 o 80 0.6 @:Ta=25 C VIN=2.2V VBIAS=CNT=2.5V Cin=Co=4.7uF Cbias=0.1uF 0.5 60 0.4 40 0.3 0.2 20 0.1 0 0 200 400 600 800 Output Current:Io(mA) Ver.2011-02-18 1000 1200 0 0.001 0.01 0.1 1 10 100 1000 Output Current : Io(mA) -7- NJM2842 NJM2842_1.2V Ripple Rejection Ratio v.s. Frequency NJM2842_1.2V Ripple Rejection(Vbias-Vout) vs. Output Current 100 120 90 f=1KHz 100 80 Io=500mA Io=10mA Io=0mA Io=1000mA Io=100mA 70 80 60 60 40 10 o @:Ta=25 C VIN=2.2V VBIAS=3.5V ein=200mVrms Cin=0.1uF(Ceramic) Cbias=4.7uF(Ceramic) Co=4.7uF(Ceramic) 40 30 1K 100 f=10KHz 50 o @:Ta=25 C Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) VIN=2.2V VBIAS=3.5V ebias=200mVrms 20 0.001 100K 10K 0.01 Frequency : f (Hz) 0.1 1 10 100 1000 Output Current : Io(mA) NJM2842_1.2V Equivalent Serise Resistance vs. Output Current NJM2842_1.2V Ripple Rejection(Vin-Vout) vs. Output Current 100 100 @:Cbias=0.1uF(Ceramic) Cin=4.7uF(Ceramic) Co=4.7uF(Ceramic) VIN=1.3V-5.5V VBIAS=2.5V-5.5V 90 f=1KHz 10 80 70 f=10KHz STABLE REGION 1 60 50 o @:Ta=25 C VIN=2.2V VBIAS=2.5V ein=200mVrms Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 40 30 20 0.001 0.01 0.1 0.1 1 10 100 0.01 0.001 1000 0.01 0.1 1.5 1.225 Output Voltage Vo (Vo) Control Voltage:Vcont(off) (V) 1.25 1 @:Vin=2.2V Vbias=2.5V Io=30mA Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) -8- 0 50 Temperature Ta(°C) 100 10 3 1.2 @:Vbias=Vcont=2.5V Vin=2.2V Io=30mA Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 1.175 1.15 0 -50 10 NJM2842_1.2V Output Voltage vs.Temperature NJM2842_1.2V Control Voltage vs.Temperature 2 0.5 1 Output Current : Io(mA) Output Current : Io(mA) 100 150 -50 0 50 Temperature Ta(°C) 100 150 Ver.2011-02-18 NJM2842 NJM2842_1.2V Quiescent Current vs.Temperature NJM2842_1.2V Peak Output Current vs.Temperature 3000 500 400 Quiescent Current:Iq(uA) Peak Output Current:Imax(mA) 2400 1800 1200 @:Vo*0.9 Vin=2.2V Vbias=Vcont=2.5V Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 600 300 200 @:Vbias=Vcont=2.5V Vin=2.2V Output is open Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 100 0 0 -50 0 50 Temperature Ta(°C) 100 -50 150 0 50 0.1 0.1 0 @:dVin=2.2-5.5V Vbias=Vcont=2.5V Io=30mA Cin=4.7uF(Ceramic) 0 @: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) -0.1 Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) -0.2 -0.2 -50 0 50 Temperature Ta(°C) 100 150 -50 0 NJM2842_1.2V Load Regulation v s.Temperatture 50 Temperature Ta(°C) 100 150 NJM2842_1.2V Output Voltage v s.Temperature 0.01 1.5 @:Vin=2.2V Vbias=Vcont=2.5V Io=30-1000mA Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 1.3 1.1 Output Voltage Vo (Vo) 0.008 Load Regulation:dVo/dIo(%/mA) 150 NJM2842_1.2V Line Regulation(VBIAS) v s.Temperatture 0.2 Line Regulation:dVo/dIo(%/V) Line Regulation:dVo/dIo(%/V) NJM2842_1.2V Line Regulation(VIN) vs.Temperatture 0.2 -0.1 100 Temperature Ta(°C) 0.006 0.004 0.9 0.7 0.5 0.3 0.002 @:Vbias=Vcont=2.5V Vin=2.2V Io=30mA Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 0.1 0 -0.1 -50 -50 Ver.2011-02-18 0 50 Temperature Ta(°C) 100 150 0 50 100 150 200 Temperature Ta(°C) -9- NJM2842 NJM2842_1.2V NM2842_1.2V Short Circuit Current vs.Temperature ON/OFF Transient Response Without Load 3.5 4 Control Voltage 1500 Output Voltage:Vo(V) 1000 @:Vin=2.2V Vbias=Vcont=2.5V Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 2.5 @:Ta=25°C VIN=2.2V VBIAS=2.5V Co=4.7uF Io=0mA 2 1.5 -6 0.5 -8 0 50 100 -10 -0.5 150 0 2 4 Temperature Ta(°C) 2 1.40 @:Ta=25°C VIN=2.2V VBIAS=2.5V Co=4.7uF Io=30mA -2 -4 -6 Output Voltage 0.5 -8 0 0 4 8 12 16 20 Output Voltage:Vo(V) 1.45 Control Voltage:Vcont(V) Output Voltage:Vo(V) 4 0 2.5 1.5 1.35 0 1.25 -500 1.20 -1000 1.10 -12 1.05 40 0 0 Output Voltage 6 1.6 2 1.28 5 4 Input Voltage 1.26 3 1.24 2 1 1.22 Output Voltage -2 1.18 -1 -3 1.16 1.18 1.2 -2500 0 -1 Time:t(ms) 200 1.20 1.20 0.8 Output Voltage:Vo(V) 1 Input Voltage:Vin(V) Output Voltage:Vo(V) 2 @:Ta=25°C Vcont=VBIAS=2.5V Co=4.7uF Io=30mA 0.4 160 @:Ta=25°C VIN=2.2V Co=4.7uF Io=30mA 1.30 4 3 0 -2000 NJM2842_1.2V Line transient Response(Vin Fixed) 1.32 1.26 - 10 - 120 80 -1500 Time:t(µs) 1.28 1.16 @:Ta=25°C VIN=2.2V VBIAS=2.5V Co=4.7uF Io=500- Output Voltage 1.15 -10 Input Voltage 1.22 500 Output Current 5 1.24 1500 1.30 NJM2842_1.2V Line transient Response(Vbias Fixed) 1.30 -12 1000 Time:t(ms) 1.32 10 NJM2842_1.2V Control Voltage 2 8 Load transient Response 3.5 3 6 Time:t(s) NJM2842_1.2V ON/OFF Transient Response -0.5 -4 Output Voltage 0 1 -2 1 0 -50 0 Output Current:Io(mA) 500 2 0 0.4 0.8 1.2 1.6 2 Input Voltage:Vin(V) Short Circuit Current:Isc(mA) 3 Control Voltage:Vcont(V) 2000 -2 Time:t(ms) Ver.2011-02-18 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 -