NJM2827F3-75

NJM2827 Negative Output Low Drop Out voltage regulator GENERAL DESCRIPTION The NJM2827 is a negative output low dropout regulator. Advanced bipolar technology achieves low noise, high precision voltage and high ripple rejection. It has soft-start and shunt SW function. 1.0µF Output capacitor and small package can make NJM2827 suitable for portable items. FEATURES Low Dropout Voltage :0.13V (typ.) @Io=60mA High Precision Output :±1.5% High Ripple Rejection :65dB(typ.) @f=1kHz, Vo=-7V Version Output capacitor with 1.0µF ceramic capacitor. Output Current :Io(max.)=100mA Soft-start Function Shunt SW Function Internal Thermal Overload Protection Internal Short Circuit Current Limit Bipolar Technology Package Outline SC88A PIN CONFIGURATION 5 4 1.GND 2.VIN 3.VOUT 4.NC 5.CS PACKAGE OUTLINE NJM2827F3 123 NJM2827F3-XX EQUIVALENT CIRCUIT GND Thermal Protection CS Bandgap Reference Current Limit VIN VOUT Ver.2010-07-13 -1- NJM2827 OUTPUT VOLTAGE RANK LIST Device Name NJM2827F3 -14 NJM2827F3 -15 NJM2827F3 -05 NJM2827F3 -06 NJM2827F3 -07 NJM2827F3 -75 NJM2827F3 -08 NJM2829F3 -10 Vout -1.4V -1.5V -5.0V -6.0V -7.0V -7.5V -8.0V -10.0V Output voltage options available: -1.5 ~ -10.0V ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Power Dissipation PD Operating Topr Temperature Storage Temperature Tstg (Ta=25°C) UNIT V mW °C RATINGS -14 250(*1) −40 ∼ +85 °C −40 ∼ +125 (*1): Mount on EIA/JEDEC STANDARD Test board (76.2*114.3*1.6mm, 2layers, FR-4) Operating voltage VIN=-3.2 ∼ -12V (In case of Vo>-3.0V version) ELECTRICAL CHARACTERISTICS (Vo-2.0V: Co=4.7µF), Ta=25°C) PARAMETER SYMBOL TEST CONDITION MIN. Output Voltage Vo Io=30mA +1.5% Quiescent Current IQ Io=0mA Output Current Io VO+0.3V 100 VIN=Vo-1V ∼ -12V(VO < -2.2V) Line Regulation ∆Vo/∆VIN VIN=-3.2V ∼ -12V(VO ≥ -2.2V) Io=30mA Load Regulation ∆Vo/∆Io Io=0∼60mA Io=60mA Dropout Voltage(*2) ∆VI_O VIN=Vo-1V ∼ -12V(VO ≤ -3.0V) VIN=-4.0V ∼ -12V(VO > -3.0V) Ripple Rejection RR ein=200mVrms, f=1kHz, Io=10mA, Vo=-7V Version Average Temperature Coefficient of Output ∆Vo/∆Ta Ta=0 ∼ 85°C, Io=10mA Voltage f=10Hz∼80kHz, Io=10mA, Output Noise Voltage VNO Vo=-7V Version CS Terminal Charge Current Ics VCS=0V 4 Input Voltage VIN -12 (*2): Excludes Vo>-3.0V version. 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. TYP. 130 130 0.13 65 MAX. -1.5% 200 0.10 0.03 0.23 - UNIT V µA mA %/V %/mA V dB ±50 100 5 - 6 - ppm/°C µVrms µA V -2- Ver.2010-07-13 NJM2827 TEST CIRCUIT VIN 0.1µF A GND IQ (Ceramic) IOUT 1.0µF *3 VOUT V VOUT VIN Cs=0.047µF NJM2827 CS *3 -2.2V≤Vo≤-2.0V version: Co=2.2µF(Ceramic) Vo>-2.0V version: Co=4.7µ F(Ceramic) Ver.2010-07-13 -3- NJM2827 TYPICAL APPLICATIONS 0.1µF (Ceramic) 1.0µF *4 VIN VIN GND VOUT VOUT Cs=0.047µF NJM2827 CS CS *4 -2.2V≤Vo≤-2.0V version: Co=2.2µF(Ceramic) Vo>-2.0V version: Co=4.7µ F(Ceramic) 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 0.1µF greater to avoid the problem. CIN should connect between GND and VIN as short as possible. Output Capacitance CO Output capacitor (Co) is required for a phase compensation of the internal error amplifier. The capacitance and the equivalent series resistance (ESR) influences stability of the regulator. This product is designed to work with a low ESR capacitor for the Co; however, use of recommended capacitance or greater value is essential 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 greater value and connect between Vo terminal and GND terminal with minimal wiring. The recommended capacitance depends on the output voltage. Low voltage regulator requires greater value of the Co. Thus, check the recommended capacitance for each output voltage. Use of a greater Co reduces output noise and ripple output, and also improves transient response of the output voltage against rapid load change. -4- Ver.2010-07-13 NJM2827 Soft-start function Capacitance Cs connect between CS pin and GND for the following. • Control at risetime of output voltage. • Reduces inrush current at output ON. When the soft start function is not used, CS pin should be open. 1.Cs capacitance vs risetime of output voltage Calculation : risetime of output voltage ∆t ≅ 213 x Cs(µF) Cs capacity vs risetime of output voltage 250 risetime of output voltage :∆ t (mS) 200 150 100 @:Ta=25oC V IN=6V C IN=0.1µF Co=1 µF(Ceramic) Io=0mA 50 0 0 0.2 0.4 0.6 0.8 1 1.2 Cs capacity : Cs(µ F) 2.Inrush current at control ON The peak value of the inrush current can be limited according to the capacitance of the Cs. Inrush current wave : Output Voltage Inrush current Output Voltage Inrush current Vin=Vo-1V Cin=0.1µF(Ceramic) Co=1µF(Ceramic) Io=0mA 50mA/div Vin=Vo-1V Cin=0.1µF(Ceramic) Co=1µF(Ceramic) Io=0mA 20mA/div Cs=0µF(Open) : IPEAK =150µA Inrush Peak Current=150mA(Cs=Open) Cs=0.0047µF : IPEAK =20µA Inrush Peak Current=20mA(Cs=0.0047µF) ‫ ٭‬This characteristic is one example. It is necessary to examine the characteristic with an actual circuit because there is an influence by the characteristic such as output voltage/output capacitor. Ver.2010-07-13 -5- NJM2827 POWER DISSIPATION vs. AMBIENT TEMPERATURE NJM2827F3 Power Dissipation (Topr= -40 ~ +85°C,Tj=125°C) 500 Power Dissipation 400 300 200 100 0 -50 -25 0 25 50 Ambient Temperature Ta(°C) 75 100 2Layers board(76.2×114.3×1.6mm, FR-4) -6- Ver.2010-07-13 NJM2827 TYPICAL CHRACTERISTICS NJM2827/-7.0V Output Voltage vs. Input Voltage @:Ta=25 C Co=1.0uF(Ceramic) 7.1 o 7.2 8 NJM2827/-7.0V Output Voltage vs. Output Current 7 6 Io=0A 7 5 4 6.9 Io=30mA 3 2 6.8 Io=100mA 1 6 .7 6.7 6.8 6.9 7 7.1 7.2 7.3 7.4 7.5 0 0 50 100 @:Ta=25 C VIN=-8.0V Co=1.0uF(Ceramic) 150 200 o Input Voltage : V IN(V) Output Current : Io(mA) 20 NJM2827/-7.0V Ground Pin Current v.s. Output Current @:Ta=25 C VIN=-8.0V Co=1.0uF(Ceramic) o 0.3 o NJM2827/-7.0V Dropout Voltage vs. Output Current @:Ta=25 C Co=1.0uF(Ceramic) 0.25 15 0.2 10 0.15 0.1 5 0.05 0 0 50 100 150 0 0 50 100 150 Output Current : I O(mA) Output Current:Io(mA) 0 NJM2827/-7.0V Load Regulation vs. Output Current 200 NJM2827/-7.0V Peak Output Current vs. Input Voltage -10 -20 150 -30 -40 100 -50 -60 @:Ta=25 C VIN=-8.0V Co=1.0uF(Ceramic) 0 50 100 150 200 o 50 @:Ta=25 C Co=1.0uF(Ceramic) 0 8 9 10 11 12 13 14 o -70 -80 Output Current : Io(mA) Input Voltage : V IN(V) Ver.2010-07-13 -7- NJM2827 NJM2827/-7.0V Quiescent Current vs. Input Voltage @:Ta=25 C Output is open. Co=1.0uF(Ceramic) 1500 o 2000 120 NJM2827/-7.0V Output Noise Voltage vs. Output Current 100 80 LPF:80k 1000 60 40 500 20 @:Ta=25 C VIN=-8.0V Co=1.0uF 10u 0.01 100u 0.1 1m 1 10m 10 100m 100 o 0 0 2 4 6 8 10 12 14 0 1u 0.001 Input Voltage : V IN(V) Output Current : Io(A) 100 NJM2827/-7.0V Ripple Rejection Ratio vs. Frequency 100 o NJM2827/-7.0V Ripple Rejection vs. Output Current @:Ta=25 C VIN=-8.0V ein=200mVrms Co=1.0uF(Ceramic) f=1kHz 90 90 80 Io=30mA 70 Io=0mA 80 70 60 60 50 Io=100mA 40 @:Ta=25 C VIN=-8.0V ein=200mVrms Co=1.0uF(Ceramic) 10 10 100 100 1k 1000 10k 104 100k 105 o 50 f=10kHz 40 30 30 20 20 0.001 0.01 0.1 1 10 100 Frequency : f (Hz) Output Current : Io(mA) 100 NJM2827/-7.0V Equivalent Serise Resistance vs. Output Current @:Ta=25 C Co=1.0uF(Ceramic) o 0.3 NJM2827/-7.0V Dropout Voltage vs. Temperature @:Io=60mA Co=1uF(Ceramic) 0.25 10 0.2 1 STABLE REGION 0.15 0.1 0.1 0.05 0.01 0.001 0.01 0.1 1 10 100 0 -50 0 50 100 o 150 Output Current : Io(mA) Temperature : Ta ( C) -8- Ver.2010-07-13 NJM2827 7.2 NJM2827/-7.0V Output Voltage vs. Temperature @:VIN=-8.0V Io=30mA Co=1.0uF(Ceramic) 10 NJM2828/-7.0V CS Charge Current v.s. Temperature @:VIN=-8.0V CS is short to ground. Co=1.0uF(Ceramic) 8 7.1 6 7 4 6.9 2 6 .8 -50 0 50 100 150 0 -50 0 50 100 150 Temperature Ta ( o C) Temperature : Ta ( o C) 250 NJM2827/-7.0V Quiescent Current vs. Temperature 0.1 NJM2827/-7.0V Line Regulation vs. Temperature @:dVIN=-8-12V Io=30mA Co=1.0uF(Ceramic) 200 0.05 150 0 100 -0.05 50 @:VIN=-8.0V Output is open. Co=1.0uF(Ceramic) -50 0 50 100 o 0 150 -0.1 -50 0 50 100 150 Temperature : Ta ( C) Temperature : Ta ( o C) 0.03 NJM2827/-7.0V Load Regulation vs. Temperature @:VIN=-8.0V Io=0-60mA Co=1.0uF(Ceramic) 8 NJM2827/-7.0V Output Voltage v.s. Temperature 0.025 6 0.02 0.015 4 0.01 2 0.005 @:VIN=-8.0V Io=30mA Co=1.0uF(Ceramic) -50 0 50 100 150 200 0 -50 0 50 100 o 0 150 Temperature : Ta ( C) Temperature Ta ( o C) Ver.2010-07-13 -9- NJM2827 NJM2827/-7.0V Short Circuit Current vs. Temperature @:VIN=-8.0V Output is short to ground. Co=1.0uF(Ceramic) 150 200 NJM2827_-7.0V Line Transient Response -6.88 -6.90 -6 -7 -8 Output Voltage:Vo(V) Input Voltage -6.94 -6.96 -6.98 -7.00 -7.02 -7.04 0 -9 100 @Ta:25°C Io=30mA Co=1.0uF -10 -11 -12 50 Output Voltage 0.4 0.8 1.2 1.6 2 -13 -14 0 -50 0 50 100 o 150 Time:t(ms) Temperature : Ta ( C) NJM2827_-7.0V Load Transient Response -6.90 -6.92 150 100 Output Current -6.94 -6.96 -6.98 -7.00 -7.02 -7.04 -7.06 50 0 -50 -100 Output Voltage @Ta:25°C Vin=-8V Co=1.0uF -150 -200 -250 0 40 80 120 160 200 Time:t(µs) Output Current:Io(mA) Output Voltage:Vo(V) [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. - 10 - Ver.2010-07-13 Input Voltage:Vin(V) -6.92