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| MITSUMI Voltage and Current Control (dual op-amp and shunt regulator) (quad op-amp and shunt regulator) MM1377, 1378 Voltage and Current Control (dual op-amp and shunt regulator) (quad op-amp and shunt regulator) Monolithic IC MM1377, 1378 Outline The MM1377 incorporates an op-amp with a dual low-input offset voltage and a shunt regulator; the MM1378 combines a quad low-input offset voltage op-amp and shunt regulator. They are appropriate for use in battery chargers, switching power supplies and other voltage and current control applications. Op-amps with low input offset voltage are particularly well-suited for handling current detection signals and other low-amplitude signals. Features Op-amp unit 1. Input offset voltage 2. Input offset current 3. Input bias current 4. Common-mode input voltage range 5. Power supply current Shunt regulator unit 1. Reference voltage 2. Reference voltage fluctuation (-20~+80C) 3. Minimum cathode current 0.2mV typ. 5nA typ. 30nA typ. 0~VCC-1V 0.6mA typ. 2.5V typ. 5mV typ. 0.4mA typ. Package SOP-8C, SOP-8E (MM1377) SOP-14B (MM1378) Applications 1. Charger 2. Switching power supply 3. AC adapter Block Diagram MM1377 MM1378 MITSUMI Voltage and Current Control (dual op-amp and shunt regulator) (quad op-amp and shunt regulator) MM1377, 1378 Pin Assignment MM1377 1 2 8 7 6 5 3 4 5 1 2 3 4 6 7 SOP-8C, SOP-8E 8 1 2 14 13 12 11 10 9 8 3 4 1 2 3 4 5 6 7 5 6 SOP-14B 7 AOUT AINAIN+(REF) GND BIN+ BINBOUT VCC AOUT AINAIN+(REF) VCC BIN+ BINBOUT 8 9 10 11 12 13 14 COUT CINCIN+ GND DIN+ DINDOUT MM1378 Equivalent Circuit Diagram MITSUMI Voltage and Current Control (dual op-amp and shunt regulator) (quad op-amp and shunt regulator) MM1377, 1378 Absolute Maximun Ratings Item Storage temperature Operating temperature Power supply voltage Allowable loss Symbol TSTG TOPR VCC max. PD Ratings -40~+125 -20~+85 -0.3~+24 300 (MM1377) 350 (MM1378) Units C C V mW Recommended Operating Conditions Item Operating temperature Operating voltage Symbol TOPR VOPR Ratings -15~+80 +2~+20 Units C V * *Minimum value of operating voltage is for amp unit only Electrical Characteristics Item Op-amp unit Input offset voltage Input offset current Input bias current Common-mode input voltage range Power supply current Voltage gain Output voltage L Output voltage H Common-mode signal rejection ratio Power supply voltage rejection ratio Output outflow current Output inflow current Shunt regulator Reference voltage Reference voltage fluctuation within operating temperature range Minimum cathode current Dynamic impedance VREF VREF I min. ZKA 2.450 2.500 2.550 5 0.4 0.4 17 1.0 0.7 V mV mA VIO IIO IB VI ICC AV VOL VOH CMRR PSRR ISO ISI RL= RL= 65 65 20 10 Excluding amp A RL=, for two circuits RL=, for four circuits MM1377 MM1378 0 0.6 1.2 100 10 VCC-1.1 VCC-0.8 85 100 35 20 100 Excluding amp A 0.2 5 30 0.9 50 150 VCC-1 1.0 2.0 mV nA nA V mA dB mV V dB dB mA mA (Except where noted otherwise, VCC=5V, Ta=25C) Symbol Measurement conditions Min. Typ. Max. Units MITSUMI Voltage and Current Control (dual op-amp and shunt regulator) (quad op-amp and shunt regulator) MM1377, 1378 Characteristics Consumption current vs power supply voltage (Ta=25C) Op-amp unit consumption current (mA) 2 1.5 Output voltage vs sync current (Ta=25C) 10 Output voltage (V) MM1378 1 0.5 1 0.1 MM1377 0 0 5 10 15 20 25 30 0.01 0.01 0.1 1 10 100 Power supply voltage (V) Sync current (mA) (VCC-output voltage) vs source current (Ta=25C) 5 Reference voltage vs cathode current (Ta=25C) Reference voltage (V) 5 4 3 2 1 0 0.001 0.01 0.1 1 10 100 VCC-output voltage (V) 4 3 2 1 0 0.01 0.1 1 10 100 Source current (mA) Cathode current (mA) Reference voltage vs Ambient temperature Reference voltage (V) 2.55 Input offset voltage vs Ambient temperature 1 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 -25 2.5 Ik = 20mA Ik = 1mA 2.45 -25 0 25 50 75 Input offset voltage (mV) 0 25 50 75 Ambient temperature (C) Ambient temperature (C) Dynamic impedance vs frequency (Ta=25C) Dynamic impedance () 5 Voltage gain vs frequency (Ta=25C) 120 100 80 60 40 20 0 0 100 1k 10k 100k 1M 4 3 2 1 0 1k 10k 100k 1M Frequency (Hz) Voltage gain (dB) Frequency (Hz) |
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