Regulator+Reset IC MM1458 MITSUMI Regulator+Reset IC Monolithic IC MM1458 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. Package SOP-7 Applications CD-ROM drive. Pin Assignment 1 GND --------------------------------------------------------------------- 7 1 6 2 5 3 SOP-7 Equivalent Circuit Diagram 4 2 RESET 3 CONT 4 VIN 5 VOUT 6 GND 7 cd Regulator+Reset IC MM1458 MITSUMI Pin Description Pin No. Pin name 1 GND Functions Equivalent circuit diagram GND pin --------------------------------------------------------------------- 2 RESET Input voltage detection output Input voltage detection output pin --------------------------------------------------------------------- RESET pin logic 3 CONT _ _ RESET VIN<VS L VIN>VS H Output voltage on/off-control pin VCONT Output L OFF H ON Connect cont-terminal with VIN, when it is not used. 4 VIN 5 VOUT Regulator Output pin 6 GND GND pin 7 Cd Voltage supply input 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 Note: Item Symbol Ratings Unit Operating temperature TOPR -20~+80 °C Storage temperature TSTG -40~+125 °C Supply voltage VIN -0.3~+10 V Output current IOUT 400 mA Power dissipation Pd 800* mW * When mounted on a 25 40 1t mm glass epoxy board. Regulator+Reset IC MM1458 MITSUMI Recommended Operating Conditions Item Symbol Ratings Unit Operating temperature TOP -20~80 °C Output current IOP 0~300 mA Operating voltage VOP 0~10 V Electrical Characteristics (Except where noted otherwise, Ta=25°C, VCONT=1.6V) Item Symbol Measurement conditions Min. Typ. Max. Unit No-load input current 1 Iccq1 VIN=5V, IOUT=0mA 3 No-load input current 2 Iccq2 VIN=4V, IOUT=0mA 4 mA Input current (OFF) Iccq3 VIN=5V, VCONT=0.4V 250 µA Output Voltage VOUT VIN=5V, IOUT=30mA Input-Output differential Voltage Vi0 8 mA Regulator 3.33 3.40 3.47 V VIN=3.2V, IOUT=150mA 0.15 0.3 V Line regulation V1 VIN=4.4~5.5V, IOUT=30mA 10 20 mV Load regulation V2 VIN=5V, IOUT=0~300mA 20 120 mV VOUT temperature VOUT Tj=-20~+80°C, VIN=5V coefficient * / T Ripple rejection * RR * Vn CONT terminal current ION High threshold voltage H Low threshold voltage L Output noise voltage IOUT=30mA VIN=5V, f=120Hz VRIPPLE=1VP-P, IOUT=30mA 50 VIN=5V, f=20~80kHz 100 ppm/°C 80 dB 40 120 µVrms 5 10 µA 1.6 VIN+0.3 V -0.3 0.4 V 4.29 V IOUT=30mA, CN=0.01µF VCONT=1.6V Reset Detection voltage VS VS temperature coefficient * VS/ T Hysteresis voltage VS VIN=H L 4.11 Tj=-20~80°C VIN=H L H 4.20 100 100 ppm/°C 200 mV 200 mV ±0.1 µA Low-level output voltage VOL VIN=3.9V, RL=4.7kΩ Output leakage current IOH VIN=5V Output current 1 IOL VIN=3.9V, RL=0Ω 5 mA Output current 2 * IOL VIN=3.9V, RL=0Ω, Ta=-20~+80°C 3 mA "H" transmission delay time * tPLH Cd=0.0µF Reset delay time tPLH1 "L" transmission delay time * tPHL Threshold operating voltage VOPL Note 1: design guaranteed VIN=4V 5V, Cd=0.1µF VOL=0.4V 100 5 30 90 µS 10 20 mS 30 90 µS 0.65 0.85 V MITSUMI Regulator+Reset IC MM1458 Measuring Circuit Application Circuit Note 1 : This regulator is not internally compensated and thus requires an external output-capacitor (COUT) for stability. Regulator+Reset IC MM1458 MITSUMI Timing Chart VIN 5V Vs Vs 0V CONT H L VOUT 5V 0V tPLH RESET 5V 0V Regulator+Reset IC MM1458 MITSUMI Characteristics Detection voltage (IOUT=0mA) Output voltage vs temperature Output voltage (V) Output voltage (V) 5 4 VOUT 3 2 RESET 1 0 1 2 3 4 5 3.5 3.48 3.46 3.44 3.42 3.4 3.38 3.36 3.34 3.32 3.3 -25 0 25 Input voltage(V) 4 5 6 7 8 9 10 Rpple rejection (dB) Output voltage (V) 100 1000 10000 100000 On board 25 40 1mm Allowable loss (mV) 800 600 400 200 25 300 10 0 -10 -20 -30 0 50 100 150 200 50 75 Temperatuer (°C) 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) Allowable loss 0 250 20 Detecting voltage vs temperature Frequenc (Hz) 0 125 Output current (mA) Ripple rejection 1000 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) 100 125 100 125