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MITSUMI System Reset (with battery back-up) MM1025, 1174 System Reset (with battery back-up) Monolithic IC MM1025, 1174 Outline These ICs were developed for D-RAM and dummy S-RAM battery back-up. D-RAM and dummy S-RAM power supplies differ from that of S-RAMs because 5V or 3.3V of power supply is required even during battery back-up. Therefore, these ICs provide voltage from a stable power supply during both normal operation and back-up. Also, the internal stable power supply switches automatically to battery back-up if the main power supply voltage goes down for any reason. Features 1. Battery back-up MM1025 Current consumption Input/output voltage difference IL=40mA Output current MM1174 Current consumption Input/output voltage difference IL=40mA Output current 2. Normal operation MM1025 Input/output voltage difference IL=80mA (built-in transistor) Output current VCC=6V External transistor drive current VCC= 6V Current consumption MM1174 (for external transistor) Input/output voltage difference IL=200mA Output current External transistor drive current (no built-in TR) VCC=3.6V Current consumption 600A typ. 0.25V typ. 40mA max. 300A typ. 0.13V typ. 40mA max. 0.29V typ. 80mA typ. 15mA typ. 900A max. 0.13V typ. Depends on external transistor 10mA typ. 500A max. 3. Switching voltage from VCC to Battery VCC=High Low MM1025 4.9V typ. MM1174 3.25V typ. 4. VCC-Battery forced switching and detection voltage adjustment possible Package SOP-8A Applications 1. Memory cards (D-RAM cards, other) 2. PCs, word processors and other equipment with D-RAMs 3. Fax machines, photocopiers and other office equipment with D-RAMs MITSUMI System Reset (with battery back-up) MM1025, 1174 Pin Assignment 1 2 8 7 6 5 3 4 5 1 2 3 4 6 7 SOP-8P (A) 8 GND GND CS VBATT VOUT VCC TRB Pin Description Pin No. 1 2 3 4 5 6 7 8 Pin name GND GND CS VBATT VOUT VCC TRB Function Forced switching and detection voltage adjustment External transistor drive Block Diagram Absolute Maximum Ratings (Ta=25C) Symbol TOPR TSTG IL max. IL max. VCC Pd Rating -20~+70 40~+125 80 40 -0.3~+18 300 Units C C mA mA V mW Item Operating temperature Storage temperature Maximum output current 1 Maximum output current 2 Power supply voltage Power consumption MITSUMI System Reset (with battery back-up) MM1025, 1174 Electrical Characteristics Item Consumption current 1 I/O voltage difference 1 1 MM1025 MM1174 MM1025 MM1174 MM1025 MM1174 MM1025 MM1174 MM1025 MM1174 MM1025 MM1174 MM1025 MM1174 MM1025 (Ta=25C) Symbol ICC VSAT1 IBATT VSAT2 VOUT REG-L REG-IN TCVO VTH1 VHYS IB max. VCSH VCSL Measurement conditions VCC=6V, VBATT=0V, IL=0mA VCC=3.6V, VBATT=0V, IL=0mA VCC=5V, VBATT=0V, IL=80mA VCC=3.0V, VBATT=0V, IL=200mA VCC=0V, VBATT=6V, IL=0mA VCC=0V, VBATT=3.6V, IL=0mA VCC=0V, VBATT=5V, IL=40mA VCC=0V, VBATT=3.0V, IL=20mA VCC=6V or VBATT=6V, IL=5mA VCC=3.6V or VBATT=3.6V, IL=3mA VCC : IL=0-80mA, VBATT : IL=0-40mA VCC=0V, VBATT=3.6V, IL=0~20mA VCC or VBATT=5.5~10V, IL=5mA VCC or VBATT=3.6V~10V, IL=3mA VCC or VBATT=6V, IL=5mA VCC or VBATT=3.6V, IL=3mA VCC=6V VCC=4V VCC=4V VCC=3V 4V, VBATT=6V, IL=40mA 3V, VBATT=3.6V, IL=3mA 6V, VBATT=6V, IL=40mA 4V, VBATT=3.6V, IL=3mA 8PIN 8PIN 4.8 3.1 100 15 9.0 5.0 0.01 0.01 4.9 3.25 200 30 15.0 10.0 0.10 0.10 5.1 3.4 400 60 20.0 20.0 0.50 0.50 0.50 0.50 4.8 3.14 400 150 0.15 Min. Typ. Max. Units 0.6 0.25 0.15 0.9 0.50 0.29 0.13 600 300 0.25 0.13 5.0 3.27 1.20 1.00 0.40 020 780 600 0.40 0.20 5.2 3.40 0.05 0.05 0.05 0.05 mA V A V V %/mA %/V %/C V mV mA V V * Consumption current 2 I/O voltage difference 2 Output voltage Load fluctuation rate Input fluctuation rate Output voltage emperature coefficient MM1174 Switching voltage (H L) MM1025 MM1174 MM1025 MM1174 MM1025 MM1174 MM1025 MM1174 MM1025 MM1174 Hysteresis voltage Maximum base driving current CS output voltage H CS output voltage L VCC=6V, VCC Ampere meter VCC=3.6V, VCC Ampere meter VCC=6V, VBATT=6V, VOUT-VCS VCC=3.6V, VBATT=3.6V, VOUT-VCS VCC=4V, VBATT=6V VCC=3.0V, VBATT=3.6V Timing Chart VCC VTHI VCC VBATT VHYS VCC VOUT VOUT VOUT- VCSH CS VCSL MITSUMI System Reset (with battery back-up) MM1025, 1174 Characteristics (MM1025 series) Output voltage and current consumption for VCC voltage supply IBATT (mA) 1.000 VOUT 1000 /div .5000 /div VOUT (V) 5.000 Output voltage and current consumption for battery voltage supply IBATT (mA) 100.0 VOUT VOUT (V) 5.000 10.00 /div .5000 /div ICC ICC 0000 0000 VBATT 1.000/div (V) .0000 10.00 .0000 .0000 VBATT 1.000/div (V) .0000 10.00 (RL=120) (RL=120) Output voltage and current consumption for VCC voltage supply ICC (mA) 2.000 VOUT VOUT (V) 5.000 Output voltage and current consumption for battery voltage supply ICC (mA) 100.0 VOUT VOUT (V) 5.000 2000 /div .5000 /div 10.00 /div .5000 /div ICC .0000 .0000 .0000 10.00 .0000 .0000 ICC .0000 10.00 VCC 1.000/div (V) VBATT 1.000/div (V) (RL=) (RL=) Power supply switching voltage VOUT (V) 5.000 ICC (mA) 100.0 .5000 /div 10.00 /div .0000 4.0000 VCC .2000/div (V) (Ta = ambient temperature) .0000 6.000 MITSUMI System Reset (with battery back-up) MM1025, 1174 VCC output current (external power transistor) Output voltage (V) 5.0 4.8 4.6 0 500 1000 VCC=6.0V VBATT=0V External Tr 2SA1020Y VBATT output current Output voltage (V) IL (mA) 5.0 4.8 4.6 0 20 40 60 VCC=0V VBATT=6.0V 70 IL (mA) VCC output current (no external power transistor) Output voltage (V) (No external power transistor) 5.0 4.8 4.6 0 50 100 VCC=6.0V VBATT=0V IL (mA) Characteristics Current consumption (A) (MM1174 series) Current consumption 1-2 temperatures Input/output voltage difference 1 temperature (external transistor 2SA1020) Output voltage (V) 3.0 2.8 2.6 2.4 2.2 2.0 500 450 400 350 300 -25 0 25 50 75 Current consumption 2 Current consumption 1 50 100 150 200 250 Temperature (C) IOUT (mA) Input/output voltage difference 2 temperature Output voltage (V) 3.0 2.8 2.6 2.87V IL=-20mA 2.85V 2.80V Output voltage-Temperature Output voltage (V) VOUT=3mA 3.3 3.2 3.1 -25 0 25 50 75 -25 0 25 50 75 Temperature (C) Temperature (C) MITSUMI System Reset (with battery back-up) MM1025, 1174 Maximum base drive current-Temperature CS output voltage H-L temperature (mV) CS output voltage H (V) Base current (mA) 20 15 10 5 -25 0 25 50 75 3.3 3.2 3.1 CS output voltage L -25 0 25 50 75 CS output voltage H 100 Temperature (C) Temperature (C) Base drive current VCC-ICC, IBATT ICC (mA) 5.000 20.00 5.000 IBATT ICC IBUFF (mA) 2.000/div IBUFF IBUTT (mA) .5000/div .5000/div ICC .0000 .0000 10.00 .0000 2.750 IBATT .0000 2.950 1.000/div VCC (V) .0200/div VCC (V) VCC-VOUT, VCS VCS (V) 5.0000 5.0000 VOUT VOUT VOUT (V) VCS .5000/div .500/div .0000 0.0000 1.000/div VCC (V) .0000 10.00 CS output voltage L |
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