IC for Regulator+Reset MM1482 MITSUMI IC for Regulator+Reset Monolithic IC MM1482 June 23, 1999 Outline This IC, developed for use in CD-ROM drives, combines a 3V regulator adapted to low power consumption with a much-sought reset function (regulator input monitoring), with internal delay circuit, set to detect 4.2V. Features 1. Large output current 300mA max. 2. High ripple rejection rate 80dB typ. 3. Internal thermal shutdown circuit. 4. Internal current-limiting circuit. 5. Adjustment-free reset detection voltage 4.2V typ. 6. Easy to set delay time from voltage detection to reset release. 7. Operating temperature range and ripple elimination rate are available separately for 3 ranks. Package SOP-8D Applications 1. CD-ROM drive 2. Optical disc drivers Pin Assignment 8 7 6 5 1 2 3 4 SOP-8D (TOP VIEW) Equivalent Circuit Diagram 1 2 3 4 5 6 7 8 N. C RESET Cf VIN VOUT N. C GND Cd --------------------------------------------------------------------- IC for Regulator+Reset MM1482 MITSUMI Pin Description Pin No. Pin name 1 Functions Equivalent circuit diagram N. C --------------------------------------------------------------------- 2 RESET VIN pin voltage detection output --------------------------------------------------------------------- RESET pin logic 3 Cf _ _ RESET VIN<VS L VIN>VS H Ripple-filter pin (RESET) Please connect a capacitor between Cf-GND to reject ripple voltage of VIN for RESET. It become C-R low-pass filter. Internal impedance of Cf is typically 14kΩ. Voltage supply input pin 4 VIN 5 VOUT 6 N. C 7 GND 8 Cd Regulator Output pin GND pin Delay time capacitor pin RESET pin output delay time can be set by the capacitance connected to the Cd pin. tPLH=100000·C tPLH: transmission delay time [s] C: capacitor value [F] Absolute Maximum Ratings Item Symbol Ratings Unit Operating temperature 1 TOPR -30~+85 °C Storage temperature TSTG -40~+125 °C Supply voltage VIN -0.3~+10 V Output current IOUT 400 mA Power dissipation Pd 400(Alone)* mW * Note1: Note2: 950(With board mounted)*2 *1 Rank B: -20 ~+80°C ; Rank A: -30 ~ +85°C *2 When mounted on a (Copper foil area 80% 192 142 1t mm glass epoxy board. IC for Regulator+Reset MM1482 MITSUMI Recommended Operating Conditions (Typical model MM1482C) (Except where noted otherwise, Ta=25°C) Item Symbol Ratings Unit Operating temperature TOP -20~+85 °C Output current IOP 0~300 mA Operating voltage VOP 0~10 V Note1: *1 Rank B: -20 ~+80°C ; Rank A: -30 ~ +85°C Electrical Characteristics (Typical model 1482C) (Except where noted otherwise, Ta=25°C, VCONT=1.6V) (Except where noted otherwise, resistance unit is Ω) Item Symbol No-Load Input Current Iccgl Measurement conditions Min. Typ. Max. Unit VIN=5V IOUT=0mA C rank 2.2 4 mA A, B rank 3.0 6.0 mA 3.30 3.37 V Regulator Output Voltage VOUT VIN=5V IOUT =30mA Input-Output differential Voltage ViO VIN=3.2V IOUT=150mA 0.15 0.3 V 3.23 Line Regulation V1 VIN=4.4V~5.5V IOUT=30mA 0.05 5 mV Load Regulation V2 VIN=5V IOUT=0mA~300mA 20 120 mV VOUT Temperature Coefficient 1 * VOUT/ T Tj=-20~+80°C VIN=5V f=120Hz VRIPPLE=1VP-P Ripple Rejection RR *1 100 ppm/°C 50 80 dB 50 90 dB VIN=5V IOUT=30mA IOUT=30mA C rank A, B rank VIN=5V, f=20~80kHz Output Noise Voltage 1 * Vn IOUT=30mA C rank A, B rank 60 120 µVrms 40 120 µVrms 4.20 4.29 V Reset Vs Detecting Voltage Vs temperature Coefficient *1 Vs/ T Vs Hysteresis Voltage VIN=H L 4.11 Tj=20~80°C VIN=H L H 100 100 ppm/°C 200 mV 200 mV ±0.1 µA Low-Level Output Voltage VOL VIN=3.9V RL=4.7k Output Leakage Current IOH VIN=5V Output Current when ON 1 IOL VIN=3.9V, RL=0 5 mA IOL VIN=3.9V, RL=0 Ta=-20~+80°C 3 mA tPLH Cd Pin=open Output Current when ON 2 "H"Transmission Delay Time Reset Delay Time *1 *1 tPLH1 *1 VIN=4V 5V, Cd=0.1µF 100 5 30 90 µs 10 20 ms *1 tPHL Cd pin=open 30 90 µs Threshold Operating Voltage VOPL VOL=0.4V 0.65 0.85 V Cf terminal impedance RCF VIN=5V 14 "L"Transmission Delay Time Note 1: design guaranteed kΩ MITSUMI IC for Regulator+Reset MM1482 Measuring Circuit Application Circuit Note 1 : This regulator is not internally compensated and thus requires an external output-capacitor (COUT) for stability. Note 2 : Please be careful with regard to set wiring and temperature-related capacitor changes that may cause oscillation. IC for Regulator+Reset MM1482 MITSUMI Timing Chart VIN. 5V Vs Vs 0V VOUT 5V 0V tPLH1 RESET 5V 0V IC for Regulator+Reset MM1482 MITSUMI Characteristics (Typical model MM1482C) Regulator Output Output voltage vs temperature Output voltage (V) Output voltage (V) 5 4 3 2 1 0 1 2 3 4 5 3.4 3.38 3.36 3.34 3.32 3.3 3.28 3.26 3.24 3.22 3.2 -25 0 25 Input voltage(V) 4 5 6 7 8 9 -10 -20 -30 0 50 100 150 200 Reset Output 5 Output voltage (V) Rpple rejection (dB) 300 0 Output current (mA) 4 3 2 1 0 100 1000 10000 100000 1 Output voltage (V) 800 600 400 200 25 50 3 4 5 Detecting voltage vs temperature On board 192 142 1.2tmm 1000 2 Input voltage(V) Power Dissipation Power Dissipation (mV) 250 10 Frequency (Hz) 0 125 20 10 Ripple rejection 0 100 30 Input voltage (V) 100 90 80 70 60 50 40 30 20 10 0 10 75 Load regulation Load regulation (mV) Line regulation (mV) Line regulation 20 15 10 5 0 -5 -10 -15 -20 50 Temperature (°C) 75 100 Temperature (°C) 125 150 4.3 4.28 4.26 4.24 4.22 4.2 4.18 4.16 4.14 4.12 4.1 -25 0 25 50 75 Temperature (°C) 100 125