NJU7272. Low Dropout Voltage Regulator with Reset

Transcription

1 Low Dropout Voltage Regulator with Reset GENERAL DISCRIPTION The NJU7272 is a low drop out voltage regulator with input-monitor reset function with delay. Advanced CMOS technology achieves ultra low current consumption and high accuracy. It delivers up to 5V/1mA output power with the maximum input voltage of 9V. The NJU7272 suitable for MPU applications. FEATURES Ultra Low Quiescent Current Iq=3.5µA typ. (Io=mA) Output Voltage Accuracy Vo = ±1.% Reset Voltage Accuracy V RT = ±1.% Input Voltage Monitor type Adjustable delay time with external capacitor Output Current Io(max.)=1mA Output capacitor with.1uf ceramic capacitor Nch Open Drain Output Internal Short Circuit Current Limit CMOS Technology Package Outline SOT-23-6 PIN CONFIGURATION NJU7272F1 EQUIVALENT CIRCUIT CONT PACKAGE OUTLINE NJU7272F1 Output Control Vref Current Limit Delay Circuit Vref Ver

2 OUTPUT VOLTAGE/ DETECTION VOLTAGE Device Name Output Voltage Detection Voltage NJU7272F1-152A 1.5V 2.V NJU7272F1-3342A 3.3V 4.2V NJU7272F1-555A 5.V 5.5V Output voltage options available : 1.8 ~ 5.V (.1V step) Detection voltage options available : 1.3 ~ 4.5V (.1V step) ABSOLUTE MAXIMUM RATINGS (Ta=25 C) PARAMETER SYMBOL RATINGS UNIT Input Voltage +11 V Control Voltage V CONT +11 V Pin Input Voltage V +11 V Pin Output Voltage -.3 ~ +11 V Pin Output Current I OR 5 ma Power Dissipation P D 2(*1) 4(*2) mw Operating Temperature Range Topr -4 ~ +85 C Storage Temperature Tstg -4 ~ +125 C (*1): Device itself (*2): Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers) Ver

3 ELECTRICAL CHARACTERISTICS ( =Vo+1, C IN =.1µF, C O =.1µF, Ta=25 C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT General Characteristics Quiescent Current I Q =Vo+2, V CONT =, I O =ma µa Quiescent Current at Control OFF I Q(OFF) =Vo+2, V CONT =V, I O =ma µa Regulator Block Output Voltage V O I O =3mA -1.% - +1.% V Output Current I O V O -.3V ma Line Regulation V O / =V O +1V ~ V O +6V(V O < 3.V) =V O +1V ~ 9V(V O 3.V) %/V I O =3mA Load Regulation V O / I O I O = ~ 1mA %/ma Output Voltage Temperature V O / Ta Ta= ~ 85 C, I O =1mA - ±1 - ppm/ C Coefficient Control Voltage for ON-State V CONT(ON) V Control Voltage for OFF-State V CONT(OFF) -.3 V Pull-down Resistance R CONT MΩ Short Circuit Limit I LIM V O =V ma Input Voltage V Dropout Voltage V I-O I O =4mA 1.5V V O 2.V V I O =6mA Reset Block 2.1V V O 2.4V V 2.5V V O 2.7V V 2.8V V O 3.3V V 3.4V V O 5.V V 5.1V V O 6.V V Detection Voltage V DET -1.% - +1.% V Hysteresis Voltage V HYS mv =1.2V ma Pin Output Nch, V I DS =.5V Current OR V CONT =V =2.4V ma (V DET 2.7V Version) Output Leak Current I LEAK = =V CONT =9V µa Detection Voltage Temperature Coefficient V DET / Ta Ta= ~ 85 C - ±1 - ppm/ C Delay Time td =V DET +1, =4.7nF ms Operating Voltage(*4) V OPL R L =1kΩ V (*3): The value condition that become 1% or less of. Ver

4 TIMING CHART [V] V HYS V DET V OPL t VO[V V O t [V] t d t d t d is the case where a pull-up is carried out to through resistance. t Ver

5 TEST CIRCUIT 1 COMMON TEST CIRCUIT V V DET / V OPL.1µF NJU7272 I OUT.1µF (Ceramic) V R L=1kΩ A V CONT V I CONT V 2 OUTPUT CURRENT/OUTPUT LEAK CURRENT TEST CIRCUIT.1µF NJU7272.1µF (Ceramic) A I OR/I LEAK V DS/ Ver

6 3 QUIESCENT CURRENT TEST CIRCUIT A I Q/I Q(OFF).1µF NJU7272.1µF (Ceramic) 4 DELAY TIME TEST CIRCUIT Oscilloscope.1µF NJU7272 R L=1kΩ ch1 ch2 4.7nF Ver

7 TYPICAL APPLICATION 1 In case that ON/OFF Control is not required:.1µf NJU7272.1µF R L=1kΩ 4.7nF Connect control terminal to terminal. 2 In use of ON/OFF Control:.1µF NJU7272.1µF R L=1kΩ 4.7nF State of control terminal: H output is enabled. L or open output is disabled. Ver

8 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.1µf greater to avoid the problem. C IN should connect between 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 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. POWER DISSIPATION vs. AMBIENT TEMPERATURE Power Dissipation P D (mw) NJU7272F1 Power Dissipation (Topr=-4 +85,Tj=125 C) On Board( mm, FR-4) Device itself Ambient Temperature Ta( C) Ver

9 TYPICAL CHARACTERISTICS (LDO BLOCK) 4 Output Voltage vs. Input Voltage 4 Output Voltage vs. Output Current 3.8 Co=.1µF(Ceramic) 3.5 Output Voltage : Vo(V) Io=mA Output Voltage :Vo (V) Io=3mA 1 3 Io=1mA.5 Co=.1µF(Ceramic) Input Voltage : (V) Output Current :Io (ma) 1 Ground Pin Current vs. Output Current Co=.1µF(Ceramic).5 Dropout Voltage vs. Output Current Co=.1µF(Ceramic) 8.4 Ground Pin Current : I (µa) Dropout Voltage:dVI-O (V) Output Current : IO(mA) Output Current:Io(mA) Load Regulation vs. Output Current 2 Quiescent Current vs. Input Voltage -2 Co=.1µF(Ceramic) Output is open. Co=.1µF(Ceramic) Load Regulation : dvo/dio (mv) Quiescent Current : I Q (µa) Output Current : Io(mA) Input Voltage : VIN(V) Ver

10 TYPICAL CHARACTERISTICS (LDO BLOCK) Output Noise Voltage : Vn(µVrms) Output Noise Voltage vs. Output Current Co=.1µF Output Current : Io(mA) Ripple Rejection Ratio : RR (db) Ripple Rejection Ratio vs. Frequency Io=mA ein=2mvrms Co=.1µF(Ceramic) Io=3mA Io=1mA 1 1 1k 1k 1k Frequency : f (Hz) Ripple Rejection Ratio : RR (db) Ripple Rejection Ratio vs. Output Current f=1khz f=1khz Co=.1µF(Ceramic) ein=2mvrms Equivalent Serise Resistance : ESR( Ω) Equivalent Serise Resistance vs. Output Current STABLE REGION Co=.1µF(Ceramic) Output Current : Io (ma) 1µ 1µ 1µ 1m 1m 1m Output Current : Io(A) Ver

11 TYPICAL CHARACTERISTICS (LDO BLOCK).3.25 Dropout Voltage vs. Co=.1µF(Ceramic) Output Voltage vs. Temperature V =4.3V IN Io=3mA Co=.1µF Dropout Voltage:dVI-O (V) Output Voltage :Vo (V) NJM7272_3.3V Quiescent Current vs. Output is open. Co=.1µF(Ceramic) -.5 Line Regulation vs. Io=3mA Co=.1µF(Ceramic) Quiescent Current : I Q (µa) Line Regulation : dvo/dio (%/V) Load Regulation vs. Io=-1mA Co=.1µF(Ceramic) 4 35 Short Circuit Current vs. Output is short to ground. Co=.1µF(Ceramic) Load Regulation : dvo/dio (%/mv) Short Circuit Current : I SC (ma) Ver

12 TYPICAL CHARACTERISTICS (RESET BLOCK) 4.22 NJU7272_4.2V Voltage Detection vs. Temperature =V DET =H L 4.31 NJU7272_4.2V Release Voltage vs. Temperature =V DET =H L H Co=.1µF Co=.1µF Voltage Detection :V DET (V) Release Voltage :V RT (V) NJU7272_4.2V VOR pin output current vs. Drain-source Voltage VCONT=V NJU7272_4.2V VOR pin output current vs. Temperature VDS=.5V VCONT=V VOR pin output current :I OR (ma) VIN=2.4V VIN=1.2V VOR pin output current :I OR (ma) VIN=2.4V VIN=1.2V Drain-Source Voltage : VDS ( V ) NJU7272_4.2V Delay time (L H) =V DET =H =4.7nF L 2 NJU7272_4.2V Delay time ( H L ) =V DET =H L Delay Time ( ms ) 1 Delay Time ( µs ) Ver

13 [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