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| NJM78LR05 SERIES REGULATOR WITH RESET FUNCTION GENERAL DESCRIPTION The NJM78LR05 is a series regulator with reset function. In case of shut down or output voltage drop, the IC generates reset signal to a microcomputer. That is suitable for items with microcomputer, such as TV sets, remote controller, refrigerator and others. PACKAGE OUTLINE NJM78LR05BD / CD / DD NJM78LR05BM / CM / DM FEATURES Output Current IO=150mA max. Reset Function Including Reset Delay Time can be Adjusted NJM78LR05BL / CL / DL by an External Capacitance. Internal Over Current Protection Thermal Shut Down Bipolar Technology package Outline DIP8, DMP8, SIP8, SOT-89 (5Pin) NJM78LR05BU / CU / DU RESET THRESHOLD VOLTAGE LINE-UP Reset Threshold Voltage 4.0V 4.2V 4.3V "X" is package suffix. Version D C B Part Number NJM78LR05DX NJM78LR05CX NJM78LR05BX BLOCK DIAGRAM Ver.2003-07-18 -1- NJM78LR05 PIN CONFIGURATION PIN FUNCTION 1. INPUT 2. NC 3. Cd 4. NC 5. GND 6. RESET-OUTPUT 7. NC 8. OUTPUT NJM78LR05BL / CL / DL NJM78LR05BD / CD / DD NJM78LR05BM / CM / DM NJM78LR05BU / CU / DU PIN FUNCTION 1. Cd 2. GND 3. RESET-OUTPUT 4. OUTPUT 5. INPUT ABSOLUTE MAXIMUM RATINGS PARAMETER Input Voltage Power Dissipation Operating Temperature Range Storage Temperature Range *At on PC board. SYMBOL VIN PD Topr Tstg MAXIMUM RATINGS +20 (DIP-8) (DMP8) (SIP8) (SOT-89) 500 500* 800 350 (Ta=25C) UNIT V mW C C -40 to +85 -50 to +150 RECOMMENDED OPERATING CONDITIONS PARAMETER Input Voltage Output Current SYMBOL VIN IO CONDITIONS 7.5 to 18 1 to 100 (Ta=25C) UNIT V mA -2- Ver.2003-07-18 NJM78LR05 ELECTRICAL CHARACTERISTICS [Power Supply Block] PARAMETER Output Voltage Quiescent Current Output Short Current Line Regulation 1 Line Regulation 2 Load Regulation 1 Load Regulation 2 Ripple Rejection Output Noise Voltage Dropout Voltage [Reset Block] (H) Reset Output Voltage (L) Reset Output Voltage Reset Threshold Voltage VORH VORL VRT VIN=3V, IO=1mA B Version C Version D Version Reset Threshold Hysteresis Voltage Reset Output Delay Time VRTH td Cd=0.1F 4.80 4.12 4.03 3.84 50 7.50 5.00 10 4.30 4.20 4.00 100 10.0 5.20 200 4.48 4.37 4.16 200 12.5 mV ms V mV V SYMBOL VO IQ IOSC VO / VIN1 VO / VIN2 VO / IO1 VO / IO2 RR VNO VI-O IO=1mA IO=100mA OUTPUT-GND short 7V VIN 18V 8V VIN 18V IO=1 to 100mA IO=1 to 40mA f=120Hz, ein=1VP-P, VIN=8 to 18V 10Hz f 100kHz, IO=1mA CONDITIONS MIN. 4.80 150 TYP. 5.00 1.40 300 6.0 3.0 9.0 3.0 79 80 1.5 MAX. 5.20 3.40 450 65.0 42.0 60.0 30.0 2.2 UNIT V mA mA mV mV mV mV dB V V (VIN=10V, IO=40mA, CIN=1F, CO=10F, Ta=25C) Ver.2003-07-18 -3- NJM78LR05 APPLICATION CIRCUIT td [ms] = 100xCd [F] Note 1 : When the capacitance Cd is too large, the actual delay time is shorter than the calculated result because an electrical charge of Cd is discharged incompletely. Solution of above problem : (1) Connect SBD between output terminal and Cd terminal. Please refer to the fallowing circuit. (2) Select larger capacitance, CIN than Cd. -4- Ver.2003-07-18 NJM78LR05 TIMING CHART 1 When the input voltage is up to about 0.8V, some voltage is outputted at the reset output because the NJM78LR05 operation is unstable. 2 When the input voltage goes over about 0.8V, the reset output becomes "L". 3 The output voltage is rising up with the input voltage. 4 When the output voltage goes over (VRT+VRTH), the delay circuit of reset output activates. VRT : Reset Threshold Voltage VRTH : Reset Threshold Hysterisis Voltage 5 After the reset output delay time td has passed, the reset output becomes "H". 6 The output voltage is falling down with the input voltage. 7 When the output voltage is less than VRT, the reset output becomes "L". Ver.2003-07-18 -5- NJM78LR05 TYPICAL CHARACTERISTICS Reset Output Voltage vs. Output Voltage Line Regulation Load Regulation Dropout Voltage Quiescent Current vs. Input Voltage Output Short Current vs. Input Voltage -6- Ver.2003-07-18 NJM78LR05 TYPICAL CHARACTERISTICS Reset Output Delay Time vs. Reset Output Delay Capacitance Ripple Rejection vs. Frequency Ver.2003-07-18 -7- NJM78LR05 TYPICAL CHARACTERISTICS Thermal Shutdown Output Voltage vs. Ambient Temperature Reset Output Voltage vs. Reset Sink Current [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. -8- Ver.2003-07-18 |
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