NJU7790 LOW DROPOUT VOLTAGE REGULATOR GENERAL DESCRIPTION The NJU7790 is a 500mA output low dropout voltage regulator with ON/OFF control. Advanced CMOS technology achieves high ripple rejection and low quiescent current. Small packaging and 2.2µF small decoupling capacitor make the NJU7790 suitable for space conscious applications. PACKAGE OUTLINE NJU7790U1 FEATURES High Ripple Rejection 65dB typ. (f=400Hz, Vo=3.0V Version) Low quiescent Current Iq=30µA typ.(Io=0mA) Output Current Io(max.)=500mA High Precision Output Vo±1.0% Output capacitor with 2.2µF ceramic capacitor (Vo≥2.1V version) Low Dropout Voltage 0.14V typ. (Io=300mA, Vo=3.0V Version) ON/OFF Control Internal Thermal Overload Protection Internal Over Current Protection CMOS Technology Package Outline SOT-89-5 PIN CONFIGURATION 5 2 4 1 2 3 1. CONTROL 2. GND 3. N.C. 4. VOUT 5. VIN NJU7790U1 EQUIVALENT CIRCUIT VIN V OUT Thermal Protection CONTROL Output Control Vref Current Limit GND Ver.2007-07-19 -1- NJU7790 OUTPUT VOLTAGE RANK LIST Device Name VOUT NJU7790U1-15 1.5V NJU7790U1-21 2.1V NJU7790U1-03 3.0V NJU7790U1-33 3.3V NJU7790U1-05 5.0V ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Power Dissipation PD Operating Temperature Topr Storage Temperature Tstg (Ta=25°C) RATINGS UNIT +9 V +9(*1) V 350(*2) mW -40∼+85 °C -40∼+125 °C (*1) : When input voltage is less than +10V, the absolute maximum control voltage is equal to the input voltage. (*2) : Device itself. Operating voltage VIN=+2.3 ∼ +8V (In case of Vo<2.1V version) ELECTRICAL CHARACTERISTICS (VIN=Vo+1V, CIN=1.0µF, Co=2.2µF(Co=4.7µF: Vo≤2.0V), Ta=25°C) PARAMETER Output Voltage Input Voltage Quiescent Current Quiescent Current at Control OFF SYMBOL Line Regulation ∆Vo/∆VIN Load Regulation ∆Vo/∆Io Pull-down Resistance Control Voltage for ON-state Control Voltage for OFF-state UNIT -1.0% – – – – 30 +1.0% 8 60 V V µA – 0.1 1.0 µA 500 – – mA – 180 – mA – – 0.15 %/V – – – – – – 0.17 0.15 0.14 0.12 0.005 0.22 0.19 0.18 0.16 %/mA V V V V – 65 – dB Ta=0 ∼ +85°C, Io=10mA – ±100 – ppm/°C f=10Hz ∼ 80kHz, Io=10mA, Vo=3VVersion – 75 – µVrms 2 1.6 – 5 – – 10 – 0.3 MΩ V V VCONT=0V ILIM Output Noise Voltage MAX. IQ(OFF) Short Current Limit Average Temperature Coefficient of Output Voltage TYP. Io=30mA Io Ripple Rejection MIN. Vo VIN IQ Output Current Dropout Voltage(*3) TEST CONDITION ∆VI-O RR ∆Vo/∆Ta VNO Io=0mA, VCONT=VIN, Include ICONT Vo - 0.1V(Vo≤2.0V Version) Vo - 0.3V(Vo≥2.1V Version) Vo=0V VIN=Vo+1V ∼ Vo+6.0V (Vo<2V Version) VIN=Vo+1V ∼ 8.0V (Vo≥2V Version), Io=30mA Io=0 ∼ 500mA 2.1V≤Vo<2.5V 2.5V≤Vo<2.9V Io=300mA 2.9V≤Vo<3.5V 3.5V≤Vo≤5.0V ein=200mVrms,f=400Hz,Io=10mA, Vo=3V Version RCONT VCONT(ON) VCONT(OFF) (*3): Except output voltage less than 2.1V. 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. -2- Ver.2007-07-19 NJU7790 TEST CIRCUIT A IIN VIN VIN NJU7790 1.0µF A ICONT VOUT IOUT V VOUT CONTROL GND V VCONT *4 *4 2.2µF (ceramic) Vo≤2.0V version: Co=4.7µF(ceramic) TYPICAL APPLICATION 1 In case that ON/OFF Control is not required: VIN VIN 1.0µF VOUT NJU7790 VOUT 2.2µF *5 CONTROL GND *5: Vo≤2.0V version: Co=4.7µF Connect control terminal to VIN terminal. Ver.2007-07-19 -3- NJU7790 2 In use of ON/OFF Control VIN VIN 1.0µF VOUT NJU7790 VOUT 2.2µF *5 CONTROL GND *5: Vo≤2.0V version: Co=4.7µF State of control terminal: ● “H” → output is enabled. ● “L” or “open” → output is disabled. 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. Use the CIN value of 1.0µF greater to avoid the problem. CIN should connect between GND and VIN as short as possible. -4- Ver.2007-07-19 NJU7790 TYPICAL CHARACTERISTICS ●DC CHARACTERISTICS NJU7790_3.0V Output Voltage vs. Input Voltage 3.2 NJU7790_3.0V Output Voltage vs. Output Current 3.5 o @:Ta=25 C Co=2.2µF(Ceramic) CIN=1.0µF 3.1 3 Output Voltage : Vo(V) Output Voltage : Vo(V) 2.5 Io=0A 3 2.9 Io=30mA 2.8 2 1.5 1 o Io=100mA @:Ta=25 C VIN=4.0V Co=2.2µF(Ceramic) CIN=1.0µF 0.5 2.7 2.7 2.8 2.9 3 3.1 3.2 3.3 0 3.4 0 200 400 Input Voltage : VIN(V) 600 800 1000 1200 Output Current : Io(mA) NJU7790_3.0V Ground Pin Current v.s. Output Current NJU7790_3.0V Dropout Voltage vs. Output Current 1 200 Dropout Voltage:dVI-O (V) Ground Pin Current : IGND (uA) 0.8 150 100 50 0.6 0.4 0.2 o @:Ta=25 C VIN=4.0V Co=2.2µF(Ceramic) CIN=1.0µF o @:Ta=25 C Co=2.2µF(Ceramic) CIN=1.0µF 0 0 0 100 200 300 400 500 600 700 0 800 100 200 NJU7790_3.0V Output Voltage vs. Control Voltage 3.5 300 400 500 600 700 800 Output Current:Io(mA) Output Current : IO(mA) NJU7790_3.0V Load Regulation vs. Output Current 0 Load Regulation : dVo-lo(mV) 3 Output Voltage : Vo(V) 2.5 2 1.5 1 o @:Ta=25 C VIN=4.0V Co=2.2µF(Ceramic) Io=30mA C IN=1.0µF 0.5 -10 -15 o @:Ta=25 C VIN=4.0V Co=2.2µF(Ceramic) C IN=1.0µF 0 -20 0 0.5 1 1.5 2 2.5 Control Voltage : Vcont(V) Ver.2007-07-19 -5 3 3.5 0 200 400 600 800 Output Current : lo(mA) -5- NJU7790 TYPICAL CHARACTERISTICS ●DC CHARACTERISTICS NJU7790_3.0V Output Current vs. Input Voltage 1200 1000 40 µ A) Quiescent Current : Iq(µ Output Current : lo(mA) NJU7790_3.0V Quiescent Current vs. Input Voltage 50 800 600 400 30 20 o @:Ta=25 C Output is open Co=2.2µF(Ceramic) including I CONT C IN=1.0µF 10 200 o @:Ta=25 C Co=2.2µF(Ceramic) CIN=1.0µF 0 0 3 4 5 6 7 0 8 2 Input Voltage : VIN(V) 4 6 8 10 Input Voltage : VIN(V) ●AC CHARACTERISTICS NJU7790_3.0V Output Noise Voltage vs. Output Current NJU7790_3.0V Ripple Rejection Ratio vs. Frequency 100 80 Ripple Rejection Ratio : RR (dB) Output Noise Voltage : Vn(µ µ Vrms) 200 150 100 50 o @:Ta=25 C VIN=4.0V LPF:80kHz C IN=1.0µF Co=2.2µF(Ceramic) 0 0.001 0.01 0.1 1 10 100 lo=0A 60 lo=10mA 40 20 @:Ta=25oC VIN=4.0V ein=200mVrms CIN=1.0µF Co=2.2µF(Ceramic ) 0 0.01 1000 0.1 40 f=10kHz 20 0.1 1 10 Output Current : Io(mA) Ver.2007-07-19 Equivalent Serise Resistance : ESR(Ω ) Ripple Rejection Ratio : RR (dB) 60 0.01 1000 o f=1kHz 0.001 100 100 o @:Ta=25 C VIN=4.0V ein=200mVrms Co=2.2µF(Ceramic ) CIN=1.0µF 0 10 NJU7790_3.0V Equivalent Serise Resistance vs. Output Current NJU7790_3.0V Ripple Rejection Ratio vs. Output Current 80 1 Frequency(kHz) Output Current : Io(mA) 100 lo=30mA 100 1000 @:Ta=25 C VIN=4.0V Co=2.2µF(Ceramic) C IN=1.0µF 10 1 STABLE REGION 0.1 0.02 0.001 0.01 0.1 1 10 100 1000 Output Current : Io(mA) -6- NJU7790 TYPICAL CHARACTERISTICS ●TEMPERATURE CHARACTERISTICS NJU7790_3.0V Output Voltage v.s. Temperature NJU7790_3.0V Output Voltage v.s. Temperature 3.1 4 3.5 Output Voltage : (V) Output Voltage: (V) 3.05 3 2.95 3 2.5 2 1.5 1 @:VIN=4.0V lo=30mA Co=2.2µF(Ceramic) CIN=1.0µF 2.9 -50 0 50 100 @:VIN=4.0V Io=30mA Co=2.2µF(Ceramic) C IN=1.0µF 0.5 0 150 -50 o 0 50 100 150 200 o Temperature : Ta ( C) Temperature : Ta ( C) NJU7790_3.0V Line Regulation v.s. Temperature 0.1 NJU7790_3.0V Load Regulation v.s. Temperature 0.005 0.004 Load Regulation(%/mA) Line Regulation(%/V) 0.05 0 -0.05 0.003 0.002 0.001 @:VIN=4.0-8.0V lo=30mA Co=2.2µF(Ceramic) C IN=1.0µF -0.1 @:VIN=4.0V Io=0-500mA Co=2.2µF(Ceramic) CIN=1.0µF 0 -50 0 50 100 150 -50 o 0 50 100 150 o Temperature : Ta ( C) Temperature Ta ( C) NJU7790_3.0V Dropout Voltage v.s. Temperature 0.35 NJU7790_3.0V Pull Down Resistance v.s. Temperature 10 0.3 8 Pull Down Resistance(M Ω) Dropout Voltage(V) 0.25 0.2 0.15 0.1 0 @:VIN=6.0V I CONT=5mA Co=2.2µF(Ceramic) CIN=1.0µF 0 -50 0 50 100 o Temperature : Ta ( C) Ver.2007-07-19 4 2 @:VIN=4.0 Io=300mA Co=2.2µF(Ceramic) C IN=1.0µF 0.05 6 150 -50 0 50 100 150 o Temperature Ta ( C) -7- NJU7790 TYPICAL CHARACTERISTICS ●TEMPERATURE CHARACTERISTICS 2 2 1.5 1.5 Control OFF Voltage Vo (V) Control ON Voltage(V) NJU7790_3.0V Control ON Voltage vs Temperature 1 0.5 NJU7790_3.0V Control OFF Voltage vs Temperature 1 0.5 @:VIN=4.0V Output is open Co=2.2µF(Ceramic) C IN=1.0µF @:VIN=4.0V Output is open Co=2.2µF(Ceramic) CIN=1.0µF 0 0 -50 0 50 100 o Temperature : Ta ( C) Ver.2007-07-19 150 -50 0 50 100 150 o Temperature Ta ( C) -8- NJU7790 TYPICAL CHARACTERISTICS ●TRANSIENT RESPONSE NJU7790_3.0V ON/OFF Transient Response NJU7790_3.0V ON/OFF Transient Response 7 10 7 6 5 6 10 5 4 -5 3 -10 -15 2 0 Output Voltage 0 1 4 -10 2 -15 1 L -1 5 0 100 200 300 Time : t [ms] NJU7790_3.0V Line Transient Response 3.4 6 3.4 5 3.3 500 3.2 3 3.1 2 3 1 Output Voltage 2.9 @:Ta=25 C VIN=4.0-5.0V Co=2.2 µF(Ceramic) Io=30mA 2.7 80 120 Time : t [µ µ s] 160 200 3 Output Voltage 100 2.9 0 2.8 -1 2.7 -2 200 300 3.1 0 o 400 3.2 Output Voltage : Vo [V] 4 Input Voltage : VIN [V] Output Voltage : Vo [V] Output Current 3.3 40 -30 500 600 Input Voltage 0 400 -25 NJU7790_3.0V Load Transient Response 3.5 2.8 -20 o @:Ta=25 C V IN=4.0V Co=2.2mF(Ceramic) R =100 Ω 0 -30 2 3 Time : t [ms] -5 Output Voltage -25 L -1 4 3 -20 o @:Ta=25 C VIN=4.0V Co=2.2mF(Ceramic) R =100Ω 0 2.6 0 Output Current : Io [mA] 1 5 Control Voltage : Vo [V] 0 Control Voltage Output Voltage : Vo [V] Output Voltage : Vo [V] 5 Control Voltage : Vo [V] Control Voltage o @:Ta=25 C V IN=4.0V Co=2.2 µF(Ceramic) Io=400-500mA 40 80 120 Time : t [µ s] 160 -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. Ver.2007-07-19 -9-