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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 0.2mV typ.
2. Input offset current 5nA typ.
3. Input bias current 30nA typ.
4. Common-mode input voltage range 0~V
CC
-
1V
5. Power supply current 0.6mA typ.
Shunt regulator unit
1. Reference voltage 2.5V typ.
2. Reference voltage fluctuation (-20~+80°C) 5mV typ.
3. Minimum cathode current 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
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MITSUMI
Voltage and Current Control (dual op-amp and shunt regulator) (quad op-amp and shunt regulator) MM1377, 1378
Equivalent Circuit Diagram
Pin Assignment
1432
8567
SOP-8C, SOP-8E
1 AOUT
2 AIN
-
3 AIN+(REF)
4 GND
5 B
IN+
6 BIN
-
7 BOUT
8 VCC
SOP-14B
13 62457
14 11 913 12 10 8
1 AOUT 8 COUT
2 AIN
-
9 CIN
-
3 AIN+(REF) 10 CIN+
4 VCC 11 GND
5 B
IN+ 12 DIN+
6 BIN
-
13 DIN
-
7 BOUT 14 DOUT
MM1377
MM1378
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MITSUMI
Voltage and Current Control (dual op-amp and shunt regulator) (quad op-amp and shunt regulator) MM1377, 1378
Absolute Maximun Ratings
Item Symbol Ratings Units
Storage temperature T
STG
-
40~+125 °C
Operating temperature T
OPR
-
20~+85 °C
Power supply voltage V
CC max.
-
0.3~+24 V
Allowable loss P
D
300 (MM1377)
mW
350 (MM1378)
Recommended Operating Conditions
Item Symbol Ratings Units
Operating temperature T
OPR
-
15~+80 °C
Operating voltage V
OPR +2~+20
*
V
Electrical Characteristics
(Except where noted otherwise, VCC=5V, Ta=25°C)
Item Symbol Measurement conditions Min. Typ. Max. Units
Op-amp unit
Input offset voltage V
IO 0.2 0.9 mV
Input offset current I
IO Excluding amp A 5 50 nA
Input bias current I
B 30 150 nA
Common-mode input voltage range
VI Excluding amp A 0
VCC-
1
V
Power supply current I
CC RL=∞, for two circuits
MM1377 0.6 1.0
mA
MM1378 1.2 2.0
Voltage gain A
V 100 dB
Output voltage L V
OL RL=∞ 10 100 mV
Output voltage H V
OH RL=∞
VCC-
1.1 VCC-
0.8
V
Common-mode signal rejection ratio
CMRR 65 85 dB
Power supply voltage rejection ratio
PSRR 65 100 dB
Output outflow current I
SO 20 35 mA
Output inflow current I
SI 10 20 mA
Shunt regulator
Reference voltage V
REF 2.450 2.500 2.550 V
Reference voltage fluctuation
V
REF 517mV
within operating temperature range
Minimum cathode current I min. 0.4 1.0 mA
Dynamic impedance Z
KA 0.4 0.7 Ω
*
Minimum value of operating voltage is for amp unit only
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2
1.5
1
0.5
0
0 5 10 15 20 25 30
Power supply voltage (V
)
Op-amp unit
consumption current
(
mA
)
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=25°C)
10
1
0.1
0.01
0.01 0.1 1 10 100
Output voltage
(
V
)
Sync current
(mA)
Output voltage vs sync current (Ta=25°C)
5
4
3
2
1
0
0.01 0.1 1 10 100
Source current (mA
)
VCC-output
voltage
(
V
)
(VCC-output voltage) vs source current (Ta=25°C)
5
4
3
2
1
0
0.001
0.01 0.1 1 10 100
Cathode current (mA
)
Reference voltage
(
V
)
Reference voltage vs cathode current (Ta=25°C)
2.55
2.5
2.45
-
25 0 25 50 75
Reference voltage
(
V
)
Ambient temperature
(°C)
Reference voltage vs temperature
1
0.8
0.6
0.4
0.2
0
-
0.2
-
0.4
-
0.6
-
0.8
-
1
-
25 0 25 50 75
Input offset voltage
(
mV
)
Ambient temperature (°C)
Input offset voltage vs temperature
5
4
3
2
1
0
1 10 100 1000
Dynamic impedance (Ω)
Frequency (Hz)
Dynamic impedance vs frequency (Ta=25°C)
120
100
80
60
40
20
0
0 100 1K 10K 100K 1M 10M
Voltage gain (dB)
Frequency (Hz)
Voltage gain vs frequency (Ta=25°C)
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