NJM2856 LOW DROPOUT VOLTAGE REGULATOR

Transcription

1 LOW DROPOUT VOLTAGE REGULATOR GENERAL DESCRIPTION The NJM2856 is a low dropout voltage regulator with ON/OFF control. Advanced Bipolar technology achieves low noise, high ripple rejection. It delivers up to 1A output power with the maximum input voltage tolerance of 1V. The package option is high power package as TO252-5 and HSOP8. The NJM2856 is suitable for various applications such as portable / consumer equipments. FEATURES High Ripple Rejection 75dB typ. (f=1khz,vo=v Version) Output Noise Voltage Vno=45µVrms typ. Output capacitor with 2.2µF ceramic capacitor (Vo 2.7V) Output Current Io(max.)=1A High Precision Output Vo±1.% Low Dropout Voltage.2V typ. (Io=6mA) ON/OFF Control Internal Short Circuit Current Limit Internal Thermal Overload Protection Bipolar Technology Package Outline TO HSOP8 PACKAGE OUTLINE NJM2856DL NJM2856GM1 PIN CONFIGURATION NJM2856DL EQUIVALENT CIRCUIT PIN CONFIGURATION 1. CONTROL 2.. GND 4. Vo 5. NC NJM2856GM1 Exposed Pad on backside connected to GND PIN CONFIGURATION 1. V OUT 2. N.C.. GND 4. N.C. 5. CONTROL 6. N.C. 7. N.C. 8. V OUT Control Bandgap Reference Thermal Protection GND Ver

2 OUTPUT VOLTAGE RANK LIST TO252-5 Package Device Name V out NJM2856DL V NJM2856DL V NJM2856DL-2 2.V NJM2856DL V NJM2856DL-.V NJM2856DL-.V NJM2856DL-5 5.V HSOP8 Package Device Name V out NJM2856GM V NJM2856GM1-.V NJM2856GM1-5 5.V 2 Ver

3 ABSOLUTE MAXIMUM RATINGS (Ta=25 C) PARAMETER SYMBOL RATINGS UNIT Input Voltage +1 V Control Voltage V CONT +1 V TO Layer(*1) Layer (*2) 125 Unused Exposed PAD Power Dissipation P 6 D 2-Layer (*1) mw Use Exposed PAD 7 HSOP8 Unused Exposed PAD 87 4-Layer (*2) Use Exposed PAD 17 Operating Temperature Topr C Storage Temperature Tstg C (*1): Mounted on glass epoxy board. ( mm:EIA/JDEC standard size, 2Layers, copper area 1mm 2 ) (*2): Mounted on glass epoxy board. ( mm:EIA/JDEC standard size, 4Layers) (4Layers inner foil: 74.2 x 74.2mm applying a thermal via hall to a board based on JEDEC standard JESD51-5) OPERATING VOLTAGE =+2.5V ~ +8V (In case of Vo<2.V version) ELECTRICAL CHARACTERISTICS ( =V O +1V, C IN =.µf, C O =2.2µF(1.7V<V O 2.6V:4.7µF, V O 1.7V:1µF), Ta=25 C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Input Voltage V Output Voltage V O I O =ma -1.% - +1.% V Quiescent Current I Q I O =ma µa Quiescent Current at Control OFF I Q(OFF) V CONT =V 1 na Output Current I O V O -.V ma Line Regulation V O / = V O +1V~V O +6V(V O 2V), = V O +1V~8V(V O >2V), %/V I O =ma Load Regulation V O / I O I O = 1A %/ma Dropout Voltage (*) V I O I O =6mA V Ripple Rejection RR ein=2mvrms,f=1khz, I O =1mA V O =.V Version db Average Temperature Coefficient of Output Voltage V O / Ta Ta= 85 C, I O =1mA - ±5 - ppm/ C Output Noise Voltage V NO f=1hz 8kHz, I O =1mA, V O =.V Version (*4) µvrms Control Current I CONT V CONT =1.6V, I O =ma - 12 µa Control Voltage for ON-state V CONT(ON) V Control Voltage for OFF-state V CONT(OFF) V (*): The output voltage excludes under 2.1V. (*4): V O >2.V: =V O +1V, V O 2.V: =.V 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. Ver

4 POWER DISSIPATION vs. AMBIENT TEMPERATURE Power Dissipation P D (mw) on 4 layers board on 2 layers board NJM2856DL PowerDissipation (Topr=-4~+85 C,Tj=15 C) Temperature : Ta( C) Power Dissipation P D (mw) NJM2856GM1 PowerDissipation (Topr=-4~+85 C,Tj=15 C) on 4 layers board with Exposed PAD on 4 layers board without Exposed PAD on 2 layers board with Exposed PAD on 2 layers board without Exposed PAD Temperature : Ta( C) 4 Ver

5 TEST CIRCUIT A I IN V OUT.µF NJM µF *4 (ceramic) I OUT V V OU A I CONT CONTROL V V CONT GND *4 1.7V<Vo 2.6V version: Co=4.7µF(ceramic) Vo 1.7V version: Co=1µF(ceramic) Ver

6 TYPICAL APPLICATION 1 In the case where ON/OFF Control is not required: V OUT V OUT.µF R NJM2856 CONTROL GND 2.2µF *5 *5 1.7V<Vo 2.6V version: Co=4.7µF Vo 1.7V version: 1µF Connect control terminal to terminal 2 In use of ON/OFF CONTROL: V OUT V OUT.µF NJM µF *5 R CONTROL GND *5 1.7V<Vo 2.6V version: Co=4.7µF Vo 1.7V version: 1µF State of control terminal: H output is enabled. L or open output is disabled. * In the case of using a resistance "R" between and control. The current flow into the control terminal while the IC is ON state (I CONT ) can be reduced when a pull up resistance "R" is inserted between and the control terminal. The minimum control voltage for ON state (V CONT (ON) ) is increased due to the voltage drop caused by I CONT and the resistance "R". 6 Ver

7 * Input Capacitance C IN Input Capacitance C IN 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 C IN value of.µf greater to avoid the problem. C IN should connect between GND and 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) influence stability of the regulator. If use a smaller Co, it 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. This product is designed to work with any capacitor including a low ESR capacitor for the Co; however, refer "Equivalent Series Resistance vs. Output Current" and choose suitable capacitor. Ver

8 TYPICAL CHARACTERISTICS Output Voltage : Vo(V) NJM2856_.V Output Voltage vs. Input Voltage Io=A Io=1mA CNT=4.V Cin=.uF(Ceramic) Io=5mA Io=1mA Input Voltage : VIN(V) Output Voltage : Vo(V) NJM2856_.V Output Voltage vs. Output Current VIN=CNT=4.V Cin=.uF(Ceramic) Output Current : Io(mA) Ground Pin Current : I GND(mA) NJM2856_.V Ground Pin Current vs. Output Current VIN=4.V CNT=4.V Cin=.uF(Ceramic) Dropout Voltage:dVI-O (V) NJM2856_.V Dropout Voltage vs. Output Current Cin=.uF(Ceramic) Output Current : Io(mA) Output Current:Io(mA) 2 NJM2856_.V Control Current vs. Control Voltage 4 NJM2856_.V Output Voltage vs. Control Voltage 15 VIN=4.V Cin=.uF(Ceramic) Io=mA.5 Rc=Ω Control Current : Icont(uA) 1 5 Rc=5kΩ Rc=Ω Rc=1kΩ Output Voltage : Vo(V) Rc=5kΩ Rc=1kΩ VIN=4.V Cin=.uF(Ceramic) Io=mA Control Voltage : Vcont(V) Control Voltage : Vcont(V) 8 Ver

9 TYPICAL CHARACTERISTICS NJM2856_.V Load Regulation vs. Output Current 25 NJM2856_.V Peak Output Current vs. Input Voltage -1 Load Regulation : dvo/dio(mv) Vin=4.V Cin=.uF(Ceramic) Output Current : Io(mA) Peak Output Current : IoMAX(mA) Cin=.uF(Ceramic) IntegrationTime:1ms MeasureDelay:1ms PulseWidth:5ms Input Voltage : VIN(V) 6 NJM2856_.V Quiescent Current v.s. Input Voltage 1 NJM2856(1A)_mold_.V Output Noise Voltage vs. Output Current Quiescent Current : IQ (ua) Output is open. Cin=.uF(Ceramic) Output Noise Voltage : Vn(uVrms) VIN=4.V LPF:8kHz Co=2.2uF(ceramic) Input Voltage : VIN(V) Output Current : Io(mA) 1 NJM2856(1A)_mold_.V Ripple Rejection Ratio vs. Frequency 1 NJM2856(1A)_mold_.V Ripple Rejection vs. Output Current Ripple Rejection Ratio : RR (db) Io=1mA Io=1mA Io=mA Io=mA VIN=4V ein=2mvrms k 1k 4 1k 1 5 Frequency : f (Hz) Ripple Rejection : RR (db) f=1khz f=1khz VIN=4V ein=2mvrms Output Current : Io(mA) Ver

10 TYPICAL CHARACTERISTICS Equivalent Serise Resistance : ESR[Ω] NJM2856(2A)_mold_.V Equivalent Serise Resistance vs. Output Current VIN=4.V Io>7mA:Using cooler STABLE REGION Dropout Voltage:dVI-O (V) NJM2856_.V Dropout Voltage v.s. Vcont=4.V Cin=.uF(Ceramic) Co=4.7uF(Ceramic) Output Current : Io(mA) NJM2856_.V Output Voltage v.s. Temperature 2 NJM2856_.V Control Voltage v.s. Vcont=4.V Io=mA Cin=.uF(Ceramic) Co=4.7uF(Ceramic) Output Voltage Vo (V) Control Voltage : VCONT(ON) (V) 1.5 Io=mA Cin=.uF(Ceramic) Temperature Ta ( o C) NJM2856_.V Control Current v.s. Temperature 6 NJM2856_.V Quiescent Current v.s. Temperature Cin=.uF(Ceramic) 5 Iq+Icont Control Current : Icont (ua) VCONT=4V VCONT=1.6V Quiescent Current : IQ (ua) Vin=Vcont=4.V Output is open Cin=.uF(Ceramic) Iq Ver

11 TYPICAL CHARACTERISTICS Short Circuit Current : I SC (ma) NJM2856_.V Short Circuit Current v.s. Output is short to ground. Cin=.uF(Ceramic) Line Regulation : dvo/dio (%/V) NJM2856_.V Line Regulation v.s. Vcont=4.V Io=mA Cin=.uF(Ceramic) Load Regulation : dvo/dio (%/ma) NJM2856_.V Load Regulation v.s. Vcont=4.V Io=-1mA Cin=.uF(Ceramic) Peak Output Current : IMAX (ma) md=1ms NJM2856_.V Peak Output Current v.s. Vcont=4.V Cin=.uF(Ceramic) md=1ms NJM2856_.V Output Voltage v.s. Vcont=4.V Io=mA Cin=.uF(Ceramic) Co=4.7uF(Ceramic).5 Output Voltage Vo (V) Temperature Ta ( o C) Ver

12 TYPICAL CHARACTERISTICS.1 NJM2856_V Line Transient Response 6.25 NJM2856_V Load Transient Response Output Current 1 Input Voltage Output Voltage : Vo[V] Output Voltage Input Voltage : VIN[V] Output Voltage : Vo[V] Output Voltage Output Current : Io[mA] 2.98 Ta=25 C =4V Co=2.2µF Io=mA Time : t[µs] 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. 12 Ver