 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| NJM2890 2ch LOW DROPOUT VOLTAGE REGULATOR s GENERAL DESCRIPTION The NJM2890 is a dual low dropout voltage regulator. Advanced Bipolar technology achieves low noise, high ripple rejection and low quiescent current. s FEATURES qHigh Ripple Rejection 70dB typ. (f=1kHz) qOutput Noise Voltage Vno=30Vrms (Cp=0.01F) qOutput capacitor with 1.0uF ceramic capacitor (Vo2.7V) qOutput Current Io(max.)=150mA x 2ch qHigh Precision Output Vo1.0% qLow Dropout Voltage 0.10V typ. (Io=60mA) qOperating Voltage Range +2.5V+14V (Vo2.0V version) qON/OFF Control (Active High) qInternal Short Circuit Current Limit qInternal Thermal Overload Protection qBipolar Technology qPackage Outline VSP10 s PIN CONFIGURATION PIN FUNCTION 1. CONTROL1 2. VIN1 3. GND 4. VIN2 5. CONTROL2 s PACKAGE OUTLINE NJM2890R 1 2 3 4 5 10 9 8 7 6 6. NOISE BYPASS2 7. VOUT2 8. GND 9. VOUT1 10. NOISE BYPASS1 NJM2890R s EQUIVALENT CIRCUIT VIN1/ VIN2 Cont1/Cont2 Thermal Protection VOUT1/ VOUT2 Noise Bypass1 / Noise Bypass2 Bandgap Reference GND NJM2890 s ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Input Voltage VIN Control Voltage VCONT Power Dissipation PD Operating Temperature Topr Storage Temperature Tstg (Ta=25C) RATINGS UNIT +14 V +14(note 1) V 320 mW -40 +85 C -40 +125 C (note 1) When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage. s ELECTRICAL CHARACTERISTICS (Vo>2.0V version : Only 1CH/2CH : VIN=Vo+1V, CIN=0.1F, Co=1.0uF: Vo2.7V (Co=2.2uF: Vo2.6V), Cp=0.01F, Ta=25C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Output Voltage Vo Io=30mA -1.0% +1.0% V - Io=0mA, expect Icont Quiescent Current 120 180 IQ A - Quiescent Current VCONT=0V 100 nA IQ(OFF) - - at Control OFF Output Current Io 150 200 mA Vo-0.3V Line Regulation 0.10 %/V Vo/VIN VIN=Vo+1V Vo+6V, Io=30mA - - Load Regulation 0.03 %/mA Vo/Io Io=0 100mA - - Io=60mA Dropout Voltage 0.10 0.18 V VI-O - ein=200mVrms,f=1kHz, Io=10mA, Ripple Rejection RR 70 dB - - Vo=3V Version Average Temperature Vo/Ta Ta=085C, Io=10mA 50 - - ppm/C Coefficient of Output Voltage f=10Hz80kHz, Io=10mA, Output Noise Voltage VNO 30 Vrms - - Vo=3V Version Control Voltage for ON-state VCONT(ON) 1.6 V - - Control Voltage for OFF-state VCONT(OFF) 0.6 V - - (Vo2.0V version : Only 1CH/2CH : VIN=Vo+1V, CIN=0.1F, Co=2.2uF, Cp=0.01F, Ta=25C) PARAMETER SYMBOL TEST CONDITION Output Voltage Vo Io=30mA Io=0mA, expect Icont Quiescent Current IQ Quiescent Current VCONT=0V IQ(OFF) at Control OFF Output Current Io Vo-0.3V Line Regulation Vo/VIN VIN=Vo+1V Vo+6V, Io=30mA Load Regulation Vo/Io Io=0 100mA ein=200mVrms,f=1kHz, Io=10mA, Ripple Rejection RR Vo=1.8V Version Average Temperature Vo/Ta Ta=085C, Io=10mA Coefficient of Output Voltage f=10Hz80kHz, Io=10mA, Output Noise Voltage VNO Vo=1.8V Version Control Voltage for ON-state VCONT(ON) Control Voltage for OFF-state VCONT(OFF) MIN. -1.0% - - 150 - - - - - 1.6 - TYP. MAX. UNIT +1.0% V - 120 180 A - 200 - - 75 50 22 - - 100 0.10 0.03 - - - - 0.6 nA mA %/V %/mA dB ppm/C Vrms V V (note 2) 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. NJM2890 s OUTPUT VOLTAGE RANK LIST Device Name CH1 NJM2890R2121 2.1V NJM2890R2727 2.7V NJM2890R2818 2.8V NJM2890R2828 2.8V NJM2890R0303 3.0V NJM2890R3325 3.3V NJM2890R3333 3.3V NJM2890R0403 4.0V NJM2890R0521 5.0V Vout CH2 2.1V 2.7V 1.8V 2.8V 3.0V 2.5V 3.3V 3.0V 2.1V s TEST CIRCUIT A ICONT1 VCONT CONTROL NOISE BYPASS1 V Cp=0.01uF A IIN1 VIN1 0.1uF VIN1 VOUT1 1.0uF OR 2.2uF(Vo2.6V) IOUT1 VOUT1 V NJM2890 GND GND (Ceramic Capacitor) A IIN2 VIN2 0.1uF VIN2 VOUT2 1.0uF OR 2.2uF(Vo2.6V) NOISE BYPASS2 (Ceramic Capacitor) IOUT2 VOUT2 V A ICONT2 VCONT CONTROL V Cp=0.01uF NJM2890 s TYPICAL APPLICATION x In the case where ON/OFF Control is not required: CONTROL R (0300k) NOISE BYPASS1 Cp=0.01uF VIN1 VIN1 VOUT1 1.0uF OR 2.2uF(Vo2.6V) VOUT1 0.1uF NJM2890 GND GND (Ceramic Capacitor) VIN2 VIN2 VOUT2 1.0uF OR 2.2uF(Vo2.6V) VOUT2 0.1uF R (0300k) CONTROL NOISE BYPASS2 (Ceramic Capacitor) Cp=0.01uF Connect control terminal to VIN terminal The quiescent current can be reduced by using a resistance "R". Instead, it increases the minimum operating voltage. For further information, please refer to Figure "Output Voltage vs. Control Voltage". NJM2890 y In use of ON/OFF CONTROL: CONTROL R (0300k) NOISE BYPASS1 Cp=0.01uF VIN1 VIN1 VOUT1 1.0uF OR 2.2uF(Vo2.6V) VOUT1 0.1uF NJM2890 GND GND (Ceramic Capacitor) VIN2 VIN2 VOUT2 1.0uF OR 2.2uF(Vo2.6V) NOISE BYPASS2 (Ceramic Capacitor) VOUT2 0.1uF R (0300k) CONTROL Cp=0.01uF State of control terminal: *"H" output is enabled. * "L" or "open" output is disabled. Noise bypass Capacitance Cp Noise bypass capacitance Cp reduces noise generated by band-gap reference circuit. Noise level and ripple rejection will be improved when larger Cp is used. Use of smaller Cp value may cause oscillation. Use the Cp value of 0.01uF greater to avoid the problem. NJM2890 s ELECTRICAL CHARACTERISTICS NJM2890 s ELECTRICAL CHARACTERISTICS NJM2890 s ELECTRICAL CHARACTERISTICS NJM2890 [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. |
Price & Availability of NJM2890
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |