NJM2841 Low Output Voltage Low Dropout Regulator GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2841 is a low output voltage, low drop out regulators. It delivers up to 500mA output current with the output voltage of 0.8 to 2.5V. The use of an external bias voltage can improve the transient response and the ripple rejection characteristics NJM2841F NJM2841U2 while maintaining minimum input to output voltage. FEATURES • Output Voltage Range 0.8V to 2.5V • High Ripple Rejection 86 dB typ. (VO=1.2V version ) • Output Noise Voltage VNO=40µVrms( VO=1.2V version ) • Output Current IO(min)=500mA • 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 • Low Dropout Voltage 0.1V typ. @IO=300mA • ON/OFF Control • Built-in Thermal Overload Protection and Over Current Protection • Bipolar Technology • Package Outline SOT-23-5, SOT-89-5 PIN CONNECTION 5 4 1. CONTROL 2. GND 3. VOUT 4. VIN 5. VBIAS 1 2 3 NJM2841F 5 2 4 1 2 3 1. VOUT 2. GND 3. CONTROL 4. VBIAS 5. VIN NJM2841U2 BLOCK DIAGRAM VOUT VIN VBIAS Thermal Protection CONTROL Bandgap Reference Over Current Protection GND Ver.2013-08-01 -1- NJM2841 OUTPUT VOLTAGE RANK LIST Vout Device Name Device Name NJM2841F008 NJM2841F017 0.8V NJM2841F009 NJM2841F018 0.9V NJM2841F010 NJM2841F019 1.0V NJM2841F011 NJM2841F020 1.1V NJM2841F012 NJM2841F021 1.2V NJM2841F013 NJM2841F022 1.3V NJM2841F014 NJM2841F023 1.4V NJM2841F015 NJM2841F024 1.5V NJM2841F016 NJM2841F025 1.6V Output Voltage Range: 0.8V to 2.5V (0.1V step) ABSOLUTE MAXIMUM RATINGS PARAMETER SYNBOL Input Voltage VIN Bias Voltage VBIAS Control Voltage VCONT Power Dissipation Operating Temperature Storage Temperature PD Topr Tstg Vout 1.7V 1.8V 1.9V 2.0V 2.1V 2.2V 2.3V 2.4V 2.5V Device Name NJM2841U2-012 Vout 1.2V (Ta=25°C) RATINGS UNIT +10 V +10 V +10 V 480(*1) SOT-23-5 640(*2) mW 625(*3) SOT-89-5 2400(*4) -40 ∼ +85 °C -50 ∼ +150 °C (*1): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 2Layers) (*2): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 4Layers), internal Cu area: 74.2×74.2mm (*3): Mounted on glass epoxy board. (76.2 × 114.3 × 1.6mm:based on EIA/JDEC standard size, 2Layers, Cu area 100mm2) (*4): Mounted on glass epoxy board. (76.2 × 114.3 × 1.6mm:based on EIA/JDEC standard, 4Layers) (For 4Layers: Applying 74.2 × 74.2mm inner Cu area and a thermal via hole to a board based on JEDEC standard JESD51-5) BIAS VOLTAGE RANGE VBIAS= +2.5V to +10V (VO<1.5V) VBIAS= VO+1V to +10V (VO≥1.5V) -2- Ver.2013-08-01 NJM2841 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 SYMBOL VO IBIAS IIN IBIAS(OFF) IIN(OFF) IO ∆VO/∆VBIA S ∆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+6V(VO<1.5V) VBIAS=VO+1V to VO+6V(VO≥1.5V) IO=30mA VIN=VO+1V to VO+6V, IO=30mA IO=30 to 500mA IO=300mA VBIAS=3.5V, RR1(VBIAS) eBIAS=200mVrms, f=1kHz, IO=10mA eIN=200mVrms, f=1kHz, RR2(VIN) IO=10mA ∆VO/∆Ta VNO ICONT Ta=0 to +85°C, IO=10mA f=10Hz to 80kHz, IO=10mA VCONT=1.6V ICONT(ON) VCONT(ON) VBIAS VIN MIN. TYP. MAX. UNIT -1.0% 500 180 650 +1.0% 300 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 1.6 - - Refer to Table 1 3 12 0.6 10 9 ppm/°C µVrms µA V V V V • Table1 PARAMETER Ripple Rejection Ratio 1 (VBIAS) Ripple Rejection Ratio 2 (VIN) Output Noise Voltage SYMBOL RR(VBIAS) TEST CONDITION VBIAS=3.5V, eBIAS=200mVrms, f=1kHz, Io=10mA VO=0.8V VO=0.9V VO=1.0V VO=1.2V VO=1.5V MIN. - TYP. 80 80 79 77 75 MAX. - VBIAS=4.5V, eBIAS=200mVrms, f=1kHz, Io=10mA VO=2.5V - 70 - VO=0.8V VO=0.9V VO=1.0V VO=1.2V VO=1.5V VO=2.5V VO=0.8V VO=0.9V VO=1.0V VO=1.2V - 87 87 87 86 85 75 27 30 34 40 48 75 - RR(VIN) ein=200mVrms, f=1kHz, Io=10mA VNO f=10Hz∼80kHz, Io=10mA, VO=1.5V VO=2.5V Ver.2013-08-01 UNIT dB dB µVrms -3- NJM2841 POWER DISSIPATION vs. AMBIENT TEMPERATURE NJM2841F PowerDissipation (Topr=-40~+85°C,Tj=150°C) Power Dissipation PD(mW) 600 on 2 layers board 500 400 300 Device itself 200 100 0 -50 -25 0 25 50 75 100 125 100 125 150 Temperature : Ta(°C) NJM2841U2 PowerDissipation (Topr=-40~+85°C,Tj=150°C) 3000 Power Dissipation PD(mW) on 4 layers board 2500 2000 1500 1000 on 2 layers board 500 0 -50 -25 0 25 50 75 150 Temperature : Ta(°C) -4- Ver.2013-08-01 NJM2841 TEST CIRCUIT A IBIAS VBIAS NJM2841 0.1µF A ICONT A VIN VBIAS CONTROL VIN 4.7µF VOUT 4.7µF GND V VCONT IIN (Ceramic) IOUT V VOUT TYPICAL APPLICATION a) In case of where ON/OFF control is not required: VBIAS VBIAS VIN VIN 0.1µF 4.7µF NJM2841 R CONTROL VOUT VOUT GND 4.7µF (ceramic) Connect control pin to VBIAS pin. Though the ICONT decreases by inserting "R" to between Control pin and VBIASpin, the minimum operating voltage is increased due to the resistor "R". b) In use of ON/OFF control: VBIAS VBIAS NJM2841 0.1µF VIN VIN 4.7µF R CONTROL GND VOUT VOUT 4.7µF State of control pin: “H” → output is enabled. “L” or “open”→ output is disabled. Ver.2013-08-01 -5- NJM2841 * Bias Capacitor CBIAS and an Input Capacitor CIN CBIAS and CIN are required to prevent oscillation and reduce power supply ripple for applications when high power supply impedance or a long power supply line. Therefore, use recommended CBIAS and CIN value (refer to conditions of ELECTRIC CHARACTERISTIC) or larger and should connect between VBIAS - GND, VIN - GND as shortest path as possible to avoid the problem. *Output Capacitor 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. Use of a smaller CO may cause excess output noise or oscillation of the regulator due to lack of the phase compensation. On the other hand, Use of a larger CO reduces output noise and ripple output, and also improves output transient response when rapid load change. Therefore, use the recommended CO value (refer to conditions of ELECTRIC CHARACTERISTIC) or larger and should connect between GND and VOUT as shortest path as possible for stable operation In addition, you should consider varied characteristics of capacitor (a frequency characteristic, a temperature characteristic, a DC bias characteristic and so on) and unevenness peculiar to a capacitor supplier enough. When selecting CO, recommend that have withstand voltage margin against output voltage and superior temperature characteristic though this product is designed stability works with wide range ESR of capacitor including low ESR products. -6- Ver.2013-08-01 NJM2841 TYPICAL CHRACTERISTICS NJM2841_1.2V Output Voltage vs. Input Voltage 1.5 NJM2841_1.2V Output Voltage vs. Input Voltage 1.5 1.4 Io=0A 1.3 1 1.2 Io=0A 1.1 Io=100mA 0.5 1 Io=300mA o @:Ta=25 C VIN=2.2V Cin=Co=4.7uF (Ceramic) Cbias=0.1uF(Ceramic) o @:Ta=25 C VBIAS=CNT=2.5V Cin=Co=4.7uF (Ceramic) Cbias=0.1uF(Ceramic) 0.9 0.8 1 1.2 1.4 1.6 1.8 0 2 0 0.5 1 Input Voltage : V IN(V) 1.5 2 Input Voltage : V NJM2841_1.2V Output Voltage vs. Output Current 3 NJM2841_1.2V Ground Pin Current vs. Output Current 1 1.5 2.5 (V) BI AS o @:Ta=25 C VIN=2.2V CNT=Vbias=2.5V Cin=Co=4.7uF (Ceramic) Cbias=0.1uF(Ceramic) 0.8 1 o 0.6 @:Ta=25 C VIN=2.2V Vbias=CNT=2.5V Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 0.4 0.5 0.2 0 0 0 200 400 600 800 1000 0 1200 100 Output Current : Io(mA) 200 300 400 500 Output Current : Io(mA) NJM2841_1.2V Control Current vs. Control Voltage 20 NJM2841_1.2V Output Voltage vs. Control Voltage 1.5 o @:Ta=25 C VIN=2.2V VBIAS=2.5V Cin=Co=4.7uF (Ceramic) Cbias=0.1uF(Ceramic) Io=30mA 15 Rc=0 1 Rc=50k 10 Rc=100k Rc=0 Rc=50k 0.5 o @:Ta=25 C VIN=2.2V VBIAS=2.5V Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Io=30mA 5 Rc=100k 0 0 0 0.5 1 1.5 2 Control Voltage : Vcont(V) Ver.2013-08-01 2.5 3 0 0.5 1 1.5 2 2.5 3 Control Voltage : Vcont(V) -7- NJM2841 NJM2841_1.2V Load Regulation vs. Output Current NJM2841_1.2V Peak Output Current vs. Input Voltage 1400 0 1200 -10 1000 -20 800 600 -30 400 o @:Ta=25 C Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) IntegrationTime:1ms MeasureDelay:1ms PulseWidth:5ms o @:Ta=25 C Vin=2.2V Vbias=2.5V Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) -40 200 0 -50 0 200 400 600 800 0 1000 2 4 6 8 10 Input Voltage : V IN(V) Output Current : Io(mA) NJM2841_1.2V Quiescent Current v.s. Input Voltage NJM2841_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 CNT=2.5V Output is open. Cin=Co=4.7uF(Ceramic) Cbias=0.1uF (Ceramic) 800 Including Icont 6 600 4 400 2 200 0 0 0 2 4 6 8 10 0 2 Input Voltage : V IN(V) NJM2841_1.2V Dropout Voltage vs. Output Current 0.8 4 6 8 100 NJM2841_1.2V Output Noise Voltage vs. Output Current o @:Ta=25 C Vbias=2.5V Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) 0.7 10 Input Voltage : V BIAS(V) o @:Ta=25 C VIN=2.2V VBIAS=CNT=2.5V Cin=Co=4.7uF Cbias=0.1uF 80 0.6 0.5 60 0.4 40 0.3 0.2 20 0.1 LPF:80kHz 0 0 200 400 600 Output Current:Io(mA) -8- 800 1000 0 0.001 0.01 0.1 1 10 100 Output Current : Io(mA) Ver.2013-08-01 NJM2841 NJM2841_1.2V Ripple Rejection Ratio[Vbias] v.s. Frequency NJM2841_1.2V Ripple Rejection(Vin-Vout) vs. Output Current 100 100 Io=0mA Io=30mA Io=100mA 90 90 80 80 Io=300mA f=1KHz 70 70 60 f=10KHz 60 50 50 o o @:Ta=25 C Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) VIN=2.2V VBIAS=3.5V ebias=200mVrms 40 30 10 40 30 1K 100 100K 10K @:Ta=25 C VIN=2.2V VBIAS=2.5V ein=200mVrms Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 20 0.001 0.01 Frequency : f (Hz) 1 10 100 NJM2841_1.2V Equivalent Serise Resistance vs. Output Current NJM2841_1.2V Ripple Rejection(Vbias-Vout) vs. Output Current 100 0.1 Output Current : Io(mA) 100 f=1KHz 80 10 @:Cbias=0.1uF(Ceramic) Cin=4.7uF(Ceramic) Co=4.7uF(Ceramic) VIN=1.3V-10V VBIAS=2.5V-10V 60 f=10KHz STABLE REGION 1 40 o @:Ta=25 C VIN=2.2V VBIAS=3.5V ein=200mVrms Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 20 0 0.001 0.01 0.1 0.1 1 10 0.01 0.001 100 Output Current : Io(mA) 0.01 0.1 1 10 100 10 3 Output Current : Io(mA) NJM2841_1.2V Control Voltage v.s. Temperature NJM2841_1.2V Output Voltage v.s. Temperature 2 1.25 @:VIN=2.2V Vbias= 2.5V Io=30mA Cbias=0.1uF(Ceramic) Cin=4.7uF(Ceramic) Co=4.7uF(Ceramic) 1.5 @:Vbias= Vcont=2.5V Vin=2.2V Io=30mA Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 1.225 1 1.2 0.5 1.175 0 1.15 -50 0 50 100 o Temperature : Ta ( C) Ver.2013-08-01 150 -50 0 50 100 150 Temperature Ta ( o C) -9- NJM2841 NJM2841_1.2V Peak Output Current v.s. Temperature NJM2841_1.2V Quiescent Current v.s. Temperature 300 1000 250 800 200 600 150 400 100 @:VIN=2.2V Vbias=Vcont=2.5V Cbias=0.1uF(Ceramic) Cin=4.7uF(Ceramic) Co=4.7uF(Ceramic) 200 Vbias=Vcont=2.5V Vin=2.2V Output is open Cbias=0.1uF(Ceramic) Cin=4.7uF(Ceramic) Co=4.7uF(Ceramic) 50 0 0 -50 0 50 100 150 -50 0 50 o 100 150 Temperature : Ta ( o C) Temperature : Ta ( C) NJM2841_1.2V Line Regulation(VBIAS) v.s. Temperature NJM2841_1.2V Line Regulation(VIN) v.s. Temperature 0.2 0.2 @:dVIN=2.2-7.2V Vbias= Vcont=2.5V Io=30mA Cbias=0.1uF(Ceramic) Cin=4.7uF(Ceramic) Co=4.7uF(Ceramic) 0.1 @:dVbias=2.5-7.2V VIN= Vcont=2.2V Io=30mA Cbias=0.1uF(Ceramic) Cin=4.7uF(Ceramic) Co=4.7uF(Ceramic) 0.1 0 0 -0.1 -0.1 -0.2 -0.2 -50 0 50 100 150 -50 o 0 50 100 150 o Temperature : Ta ( C) Temperature : Ta ( C) NJM2841_1.2V Load Regulation v.s. Temperature NJM2841_1.2V Output Voltage v.s. Temperature 0.01 1.5 @:VIN=2.2V Vbias= Vcont=2.5V Io=30-500mA Cbias=0.1uF(Ceramic) Cin=4.7uF(Ceramic) Co=4.7uF(Ceramic) 0.008 1 0.006 0.004 0.5 @:VBIAS= CONT=2.5V Vin=2.2V Io=30mA Cin=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) Co=4.7uF(Ceramic) 0.002 0 0 -50 0 50 100 o Temperature : Ta ( C) - 10 - 150 -50 0 50 100 150 200 o Temperature Ta ( C) Ver.2013-08-01 NJM2841 NJM2841_1.2V Short Circuit Current v.s. Temperature 500 250 10 3.0 5 Control Voltage 2.5 0 50 o 100 0 @:Ta=25°C Vin=2.2V Vbias=2.5V Io=30mA Co=4.7uF(Ceramic) 2.0 1.5 -15 -20 0 -25 0 4 8 12 16 Temperature : Ta ( C) Time:t(ms) NJM2841 1.2V NJM2841 1.2V Load Transient Response ON/OFF Transient Response Without Load 1.5 -5 -10 -15 1.0 0.5 -20 100 Output Current Output Voltage:Vo(V) @:Ta=25°C Vin=2.2V Vbias=2.5V Io=0mA Co=4.7uF(Ceramic) Control Voltage:Vcont(V) 0 2.0 150 1.28 5 Control Voltage 2.5 -30 20 1.30 10 3.0 -10 0.5 150 3.5 -5 Output Voltage 1.0 -0.5 0 -50 Output Voltage:Vo(V) 3.5 1.26 50 @:Ta=25°C Vin=2.2V Vbias=2.5V Cin=Co=4.7uF(Ceramic) Cbias=0.1uF(Ceramic) 1.24 1.22 0 -50 1.20 -100 Output Voltage 1.18 -150 1.16 -200 Output Current:Io(mA) 750 Output Voltage:Vo(V) @:VIN=2.2V Vbias=Vcont=2.5V Output is short to ground. Cbias=0.1uF(Ceramic) Cin=4.7uF(Ceramic) Co=4.7uF(Ceramic) Control Voltage:Vcont(V) NJM2841 1.2V ON/OFF Transient Response 1000 Output Voltage 0 -25 -0.5 -30 0 1 2 3 4 5 1.14 Time:t(s) -250 0 40 120 80 160 200 Time:t(µs) 5 1.32 6 1.30 4 1.30 5 3 1.28 1.28 Input Voltage 1.26 2 @:Ta=25°C CNT=Bias=2.5V Io=30mA Co=4.7uF(Cerami ) 1.24 1.22 1 0 Output Voltage 0.8 1.2 Time:t(ms) Ver.2013-08-01 1.6 2 3 @:Ta=25°C Vin=2.2V Io=30mA Co=4.7uF(Ceramic) 1.24 1.22 2 1 Output Voltage -2 1.18 -1 -3 1.16 1.18 0.4 1.26 0 -1 0 4 Bias Voltage 1.20 1.20 1.16 Output Voltage:Vo(V) 1.32 0 0.4 0.8 1.2 1.6 2 -2 Time:t(ms) - 11 - Input Voltage:Vbias(V) NJM2841 1.2V Line Transient Response Input Voltage:Vin(V) Output Voltage:Vo(V) NJM2841 1.2V Line Transient Response NJM2841 [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. - 12 - Ver.2013-08-01