NJM2857 LOW DROPOUT VOLTAGE REGULATOR GENERAL DESCRIPTION The NJM2857 is a low dropout voltage regulator. This product has Reverse Current Protection without external SBD Advanced Bipolar technology achieves low noise, high ripple rejection and high supply voltage. 1.5A output current capacity, 4.7µF small decoupling capacitor, built-in noise bypass capacitor make the NJM2857 suitable for various applications. PACKAGE OUTLINE NJM2857DL3 FEATURES High Ripple Rejection 80dB typ. (f=1kHz, Vo=3V Version) Output Noise Voltage Vno=55µVrms typ. (Vo=3V Version) Output capacitor with ceramic capacitor Output Current Io(max.)=1.5A High Precision Output Vo ±1.0% Low Dropout Voltage 0.20V typ. (Io=1A) ON/OFF Control Internal Reverse Current Protection Internal Thermal Overload Protection Internal Over Current Protection Bipolar Technology Package Outline TO-252-5 PIN CONFIGURATION 3 1.CONTROL 2.VIN 3.GND 4.Vo 5.N.C. 123 45 NJM2857DL3 EQUIVALENT CIRCUIT VIN CONTROL VOUT Reverse Current Protection Thermal Protection Bandgap Reference Current Limit GND Ver.2010-02-08 -1- NJM2857 OUTPUT VOLTAGE Device Name VOUT NJM2857DL3-15 1.5V NJM2857DL3-25 2.5V NJM2857DL3-03 3.0V NJM2857DL3-33 3.3V NJM2857DL3-05 5.0V Output voltage options available : 1.5 ~ 5.0V (0.1V step) ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Output Terminal Voltage Vo.max (Ta=25°C) UNIT V V V RATINGS +10 +10 Vo+1 1190(*1) Power Dissipation PD mW 3125(*2) Operating Temperature Topr -40 ∼ +85 °C Storage Temperature Tstg -40 ∼ +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, copper area 100mm2) (4Layers inner foil : 74.2 x 74.2mm Applying a thermal beer hall to a board based on JEDEC standard JESD51-5) Operating voltage VIN=+2.6V(In case of Vo<2.4V) ~ +8V -2- Ver.2010-02-08 NJM2857 ELECTRICAL CHARACTERISTICS (VIN=Vo+1V(Vo<1.6V: VIN=2.6V), CIN=1.0µF, Co=4.7µF(1.7V<Vo≤2.4V: Co=10µF, Vo≤1.7V: Co=22uF), Ta=25°C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Output Voltage Vo Io=30mA -1.0% +1.0% V Input Voltage VIN 8 V Quiescent Current IQ Io=0mA 500 750 µA Quiescent Current VCONT=0V 100 nA IQ (OFF) at Control OFF Output Current Io 1500 2000 mA Vo×0.9V VIN=Vo+1V ∼ Vo+6V (Vo≤2V), 0.10 %/V Line Regulation ∆Vo/∆VIN VIN=Vo+1V ∼ +8V(Vo>2V), Io=30mA Load Regulation 0.003 %/mA ∆Vo/∆Io Io=0 ∼ 1500mA Io=1000mA 0.20 0.30 V Dropout Voltage(*1) ∆VI -O Vo=1.5V 86 82 ein=200mVrms, Vo=2.5V Ripple Rejection(*2) RR f=1kHz, dB Vo=3.0V 80 Io=10mA Vo=3.3V 79 Vo=5.0V 78 Average Temperature Coefficient of Output ∆Vo/∆Ta Ta=0 ∼ 85°C, Io=10mA ± 50 ppm/°C Voltage Vo=1.5V 26 Vo=2.5V 41 f=10Hz ∼ 80kHz, Output Noise Voltage VNO 47 Vo=3.0V µVrms Io=10mA, 51 Vo=3.3V 69 Vo=5.0V Control Current ICONT VCONT=1.6V 3 12 µA Control Voltage for ON-state VCONT(ON) 1.6 V Control Voltage for OFF-state VCONT(OFF) 0.6 V (*1): The output voltage excludes under 2.4V (*2): Vo>2.0V:VIN=Vo+1V, Vo≤2.0V:VIN=3.0V 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. POWER DISSIPATION vs. AMBIENT TEMPERATURE NJM2857DL3 PowerDissipation (Topr=-40~+85°C,Tj=150°C) Power Dissipation PD(mW) 3500 3000 on 4 layers board 2500 2000 1500 on 2 layers board 1000 500 0 -50 -25 0 25 50 75 100 Temperature : Ta(°C) Ver.2010-02-08 -3- NJM2857 TEST CIRCUIT A IIN VIN (*3) VIN 1.0µF A V VCONT (*3) -4- VOUT ICONT NJM2857 4.7µF IOUT V VOUT (ceramic) CONTROL GND 1.7V<Vo≤2.4V version:Co=10µF (ceramic) Vo≤1.7V version:Co=22µF (ceramic) Ver.2010-02-08 NJM2857 TYPICAL APPLICATIONS 1 In the case where ON/OFF Control is not required: VIN VIN VOUT VOUT (*4) 4.7µF NJM2857 1.0µF R CONTROL GND (*4) 1.7V<Vo≤2.4V version: Co=10µF Vo≤1.7V version:Co=22µF Connect control terminal to VIN terminal 2 In use of ON/OFF CONTROL: VIN VIN VOUT VOUT (*4) NJM2857 1.0µF 4.7µF R CONTROL GND (*4) 1.7V<Vo≤2.4V version: Co=10µF Vo≤1.7V version:Co=22µF State of control terminal: •“H”→ output is enabled. •“L” or “open” → output is disabled. *In the case of using a resistance "R" between VIN and control. The current flow into the control terminal while the IC is ON state (ICONT) can be reduced when a pull up resistance "R" is inserted between VIN and the control terminal. The minimum control voltage for ON state (VCONT (ON)) is increased due to the voltage drop caused by ICONT and the resistance "R". The ICONT is temperature dependence as shown in the "Control Current vs. Temperature" characteristics. Therefore, the resistance "R" should be carefully selected to ensure the control voltage exceeds the VCONT (ON) over the required temperature range. Ver.2010-02-08 -5- NJM2857 *Input Capacitance CIN Input Capacitance CIN is required to prevent oscillation and reduce power supply ripple for applications with high power supply impedance or a long power supply line. You should use the CIN value of 0.1µF larger to avoid the problem. CIN should connect between GND and VIN as shortest path 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 against rapid load change. *Reverse Current Protection A reverse current protection circuit is built-in to this product and prevents a current inflow from an Output terminal to the Input terminal when the input terminal voltage became lower than the output terminal voltage. When a regulator is controlled by off (VCONT<0.6V), the reverse current protection circuit functions. -6- Ver.2010-02-08 NJM2857 TYPICAL CHARACTERISTICS NJM2857_5.0V Output Voltage vs. Input Voltage 6 NJM2857_5.0V Output Voltage vs. Output Current 6 o @:Ta=25 C Co=4.7uF(Ceramic) Cin=1.0uF(Ceramic) 5 5 4 4 3 3 2 2 2000mA 1 1500mA o @:Ta=25 C Vin=6V Co=4.7uF(Ceramic) 0mA 500mA 1 0 1 2 3 4 5 6 0 500 NJM2857_5.0V Ground Pin Current vs. Output Current 100 1000 1500 2000 2500 3000 Output Current : Io(mA) Input Voltage : V IN(V) NJM2857_5.0V Dropout Voltage vs. Output Current 0.4 o @:Ta=25 C Co=2.2uF(Ceramic) o @:Ta=25 C VIN=6.0V Co=4.7uF(Ceramic) 0.35 80 0.3 0.25 60 0.2 40 0.15 0.1 20 0.05 0 0 500 1000 1500 2000 0 0 Output Current : I O(mA) 1000 1500 2000 Output Current:Io(mA) NJM2857_5.0V Control Current vs. Control Voltage 20 500 NJM2857_5.0V Output Voltage vs. Control Voltage 6 o @:Ta=25 C Vin=6.0V Co=4.7uF(Ceramic) Rc=100k 5 Rc=50k Rc=0 15 Rc=0 4 Rc=50k Rc=100k 10 3 2 5 o @:Ta=25 C Vin=6.0V Co=2.2uF(Ceramic) Io=30mA 1 0 0 0.5 1 1.5 2 2.5 Control Voltage : V Ver.2010-02-08 Cont 3 (V) 3.5 4 0 0 0.5 1 1.5 2 -7- NJM2857 NJM2857_5.0V Load Regulation vs. Output Current 0 NJM2857_5.0V Peak Output Current vs. Input Voltage 3200 2800 -20 2400 2000 -40 1600 -60 1200 800 -80 o @:Ta=25 C VIN=6.0V Co=4.7uF(Ceramic) -100 0 400 o 400 800 1200 1600 2000 2400 @:Ta=25 C Co=2.2uF(Ceramic) 0 5 Output Current : Io(mA) 8 9 10 NJM2857_5.0V Output Noise Voltage vs. Output Current 100 o o @:Ta=25 C Output : No load. Co=4.7uF(Ceramic) Including icont 25000 7 Input Voltage : V IN(V) NJM2857_5.0V Quiescent Current vs. Input Voltage 30000 6 80 @:Ta=25 C VIN=6.0V LPF:80kHz Co=4.7uF(Ceramic) 20000 60 15000 40 10000 20 5000 0 0 2 4 6 8 10 0 0.001 0.01 1 10 100 1000 NJM2857_5.0V Ripple Rejection vs. Output Current NJM2857_5.0V Ripple Rejection Ratio vs. Frequency 100 0.1 Output Current : Io(mA) Input Voltage : V IN(V) 100 Io=10mA Io=30mA 90 90 Io=0mA f=1kHz 80 80 70 70 60 60 f=10kHz 50 50 Io=1500mA Io=500mA 40 40 Io=1000mA o 30 20 10 100 30 1k Frequency : f (Hz) -8- o @:Ta=25 C VIN=6V ein=200mVrms Co=2.2uF(Ceramic) 10k 100k @:Ta=25 C VIN=6V ein=200mVrms Co=4.7uF(Ceramic) 20 0.001 0.01 0.1 1 10 100 1000 Output Current : Io(mA) Ver.2010-02-08 NJM2857 NJM2857_5.0V Dropout Voltage vs. Temperature NJM2857_5.0V Equivalent Serise Resistance vs. Output Current 0.4 100 @:Io =1000mA Co=4.7uF(Ceramic) 0.35 0.3 10 0.25 0.2 STABLE REGION 1 0.15 0.1 0.1 o @ :Ta=25 C Co=4.7uF(Ceramic) Vin=Vo+1V 0.02 0.001 0.01 0.1 0.05 1 10 100 10 0 -50 3 0 100 150 Temperature : Ta ( C) NJM2857_5.0V Output Voltage vs. Temperature 5.1 50 o Output Current : Io(mA) NJM2857_5.0V Control Voltage vs. Temperature @:VIN=6.0V Io=30mA Co=4.7uF(Ceramic) 2 @:VIN=6.0V Io=30mA Co=4.7uF(Ceramic) 5.05 1.5 5 4.95 1 4.9 0.5 4.85 4.8 -50 0 50 100 150 0 -50 Temperature : Ta ( o C) 50 100 150 Temperature : Ta ( o C) NJM2857_5.0V Control Current vs. Temperature NJM2857_5.0V Quiescent Current vs. Input Voltage 60 50 0 600 @:VIN=6.0V Output : No Load Co=4.7uF Vcont=1.6V 500 40 400 30 300 20 200 10 100 0 -50 0 50 Temperature : Ta ( o C) Ver.2010-02-08 100 150 @:VIN=6.0V Output : No Load Icont : Excluded Co=4.7uF 0 -50 0 50 100 150 o Temperature : Ta ( C) -9- NJM2857 NJM2857_5.0V Short Circuit Current vs. Temperature 1000 NJM2857_5.0V Line Regulation vs. Temperature 0.1 @:VIN=6.0-8.0V Io=30mA Co=4.7uF(Ceramic) @: VIN=6.0V Output is short to ground Co=4.7uF(Ceramic) 800 0.05 600 0 400 -0.05 200 -0.1 0 -50 0 50 100 -50 150 0 Temperature : Ta ( C) 100 150 NJM2857_5.0V Output Peak Current vs. Temperature NJM2857_5.0V Load Regulation vs. Temperature 0.01 50 Temperature : Ta ( o C) o 3500 @:VIN=6.0V Io=0-1500mA Co=4.7uF(Ceramic) 3000 0.008 2500 0.006 2000 1500 0.004 1000 0.002 500 @:Vin=6.0V Co=4.7uF(Ceramic) Cin=1uF(Ceramic) 0 0 -50 0 50 100 150 -50 0 50 100 150 o o Temperature : Ta ( C) Temperature : Ta ( C) NJM2857_5.0V Output Voltage vs. Temperature 6 5 4 3 2 1 @:VIN=6.0V Io=30mA Co=4.7uF 0 -50 0 50 100 150 200 o Temperature : Ta ( C) - 10 - Ver.2010-02-08 NJM2857 NJM2857_5.0V ON/OFF Transient Response NJM2857_5.0V ON/OFF Transient Response Without Load -7.5 3 -13 2 -18 @:Ta=25°C Vin=6V Io=0mA Co=4.7uF 1 0 0 1 2 3 4 -23 Output Voltage:Vo(V) Output Voltage Control Voltage:Vcont(V) Output Volatage:Vo(V) -2.5 4 6 2.5 5 -28 5 7.5 Control Voltage -33 2.5 5 -2.5 @:Ta=25°C Vin=6V Io=30mA Co=4.7uF Output Voltage 4 -7.5 3 -13 2 -18 1 -23 0 -28 -1 Time:t(s) 0 4 8 12 Control Voltage:Vcont(V) Control Voltage 6 -1 7 7.5 7 16 20 -33 Time:t(ms) NJM2857_5.0V Load Transient Response NJM2857_5.0V Input Transient Response 5.50 5.40 1500 5.25 1000 5.20 8 7 Input Voltage 5.20 0 5.10 -500 5.00 -1000 Output Voltage 4.90 -1500 @:Ta=25°C Vin=6V Io=01000mA 4.80 4.70 0 40 80 120 Time:t(µs) 160 200 5.15 6 5.10 5 5.05 4 3 5.00 Output Voltage @:Ta=25°C Io=30mA Co=4.7uF 4.95 -2000 4.90 -2500 4.85 2 Input Voltage:Vin(V) 500 Output Voltage:Vo(V) 5.30 Output CurrentIo(mA) Output Voltage:Vo(V) Output Current 1 0 0 40 80 120 160 200 Time:t(µs) [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.2010-02-08 - 11 -