MM1458 MITSUMI | Alldatasheet
Document overview
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- PDF pages: 6
Technical content
Features
- 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
Equivalent Circuit Diagram CD-ROM drive. 14 23 765 SOP-7 MITSUMI
1 GND
2 RESET
3 CONT
4 VIN
5 VOUT
6 GND
MITSUMI Regulator+Reset IC MM1458 Pin Description Absolute Maximum Ratings MITSUMI Pin No. Pin name Functions Equivalent circuit diagram
1 GND GND pin
Input voltage detection output Input voltage detection output pin RESET pin logic
3 CONT Output voltage on/off-control pin
4 VIN Voltage supply input pin
5 VOUT Regulator Output pin
6 GND GND pin
7 Cd Delay time capacitor pin
tPLH=100000·C tPLH: transmission delay time [S] C: capacitor value [F] RESET VIN<VS L VIN>VS H VCONT Output L OFF HO N Connect cont-terminal with VIN, when it is not used. RESET pin output delay time can be set by the capacitance connected to the Cd pin. 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 Note: * When mounted on a 25 40 1t mm glass epoxy board.
MITSUMI Regulator+Reset IC MM1458MITSUMI Electrical Characteristics (Except where noted otherwise, Ta=25°C, V CONT=1.6V) 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 Item Symbol Measurement conditions Min. Typ. Max. Unit No-load input current 1 Iccq1 V IN=5V, IOUT=0mA 3 8 mA No-load input current 2 Iccq2 V IN=4V, IOUT=0mA 4 mA Input current (OFF) Iccq3 V IN=5V, VCONT=0.4V 250 µA Regulator Output Voltage VOUT VIN=5V, IOUT=30mA 3.33 3.40 3.47 V Input-Output differential Voltage Vi0 V IN=3.2V, IOUT=150mA 0.15 0.3 V Line regulation V1 V IN=4.4~5.5V, IOUT=30mA 10 20 mV Load regulation V2 V IN=5V, IOUT=0~300mA 20 120 mV VOUT temperature VOUT Tj=-20~+80°C, V IN=5V coefficient * / T I OUT=30mA 100 ppm/°C Ripple rejection * RR VIN=5V, f=120Hz 50 80 dB VRIPPLE=1VP-P, IOUT=30mA Output noise voltage * Vn VIN=5V, f=20~80kHz 40 120 µVrms IOUT=30mA, CN=0.01µF CONT terminal current ION VCONT=1.6V 5 10 µA High threshold voltage H 1.6 VIN+0.3 V Low threshold voltage L -0.3 0.4 V Reset Detection voltage VS V IN=H L 4.11 4.20 4.29 V VS temperature coefficient * VS/ T Tj= -20~80°C 100 ppm/°C Hysteresis voltage VS V IN=H L H 100 200 mV Low-level output voltage VOL VIN=3.9V, RL=4.7kΩ 100 200 mV Output leakage current IOH VIN=5V ±0.1 µA Output current 1 IOL VIN=3.9V, RL=0Ω 5m A Output current 2 * IOL VIN=3.9V, RL=0Ω , Ta=-20~+80°C 3 mA "H" transmission delay time * tPLH Cd=0.0µF 30 90 µS Reset delay time tPLH1 VIN=4V 5V, Cd=0.1µF 5 10 20 mS "L" transmission delay time * tPHL 30 90 µS Threshold operating voltage VOPL VOL=0.4V 0.65 0.85 V Note 1: design guaranteed
MITSUMI Regulator+Reset IC MM1458MITSUMI Application Circuit Note 1 : This regulator is not internally compensated and thus requires an external output-capacitor (COUT) for stability. Measuring Circuit
MITSUMI Regulator+Reset IC MM1458 Timing Chart tPLH VIN VOUT CONT Vs H L RESET Vs
MITSUMI Regulator+Reset IC MM1458MITSUMI Characteristics Detection voltage (IOUT=0mA) VOUT RESET Input voltage(V) 123450 Output voltage (V) Output voltage vs temperature -25 0 25 50 75 100 1253.3 3.32 3.34 3.36 3.38 3.4 3.42 3.44 3.46 3.48 3.5 Temperature (°C) Output voltage (V) Line regulation 456789 1 0-20 -15 -10 Input voltage (V) Line regulation (mV) Load regulation 0 50 100 150 200 250 300-30 -20 -10 Output current (mA) Load regulation (mV) Ripple rejection Frequenc (Hz) 100 100 100 1000 10000 100000 Rpple rejection (dB) Detecting voltage vs temperature -25 0 25 50 75 100 1254.1 4.12 4.14 4.16 4.18 4.2 4.22 4.24 4.26 4.28 4.3 Temperature (°C) Output voltage (V) Allowable loss 0 25 50 75 100 1250 200 400 600 800 1000 Temperatuer (°C) Allowable loss (mV) On board 25 40 1mm