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MM1438

IC for Control of Lithium-ion Betteries Charging (one cell)

Mitsumi 

MITSUMI

IC for Control of Lithium-ion Betteries Charging (one cell) MM1438

Absolute Maximum Ratings (Ta=25°C)

Item

Storage temperature

Operating temperature

Power supply voltage

CFL pin input voltage

SW input voltage

Allowable loss

Symbol

Ratings

Unit

TSTG

-40~+125

°C

TOPR

-20~+70

°C

VCC max.

-0.3~+18

V

VCEL max.

-0.3~+13

V

VSW

-0.3~VCC+0.3

V

Pd

300

mW

Recommended Operating Conditions

Item

Symbol

Ratings

Unit

Operating temperature

TOPR

-20~+70

°C

Charging control operating voltage

VOPR

2.5~+17

V

Note: Operating voltage minimum value is during rated current control.

Electrical Characteristics (Except where noted otherwise, Ta=25°C, VCC=5V, SW3 : A, SW6 : A, SW7 : A) Models listed MM1438A

Item

Symbol

Measurement conditions

Min. Typ. Max. Unit

Consumption current 1

ICC1

VSW1=VSW2=0V (Charge : ON)

250 400 µA

Consumption current 2

ICC2

VSW1=VSW2=VCC (Charge : OFF)

2 10 µA

Output voltage 1

VO1

Ta=25°C

4.100 4.125 4.150 V

Output voltage 2

VO2

Ta=0~50°C

4.095 4.125 4.155 V

Current limit

VCL

90 100 110 mV

Inflow current between

CEL-CS during operation

ICEL1

3.0 5.0 7.0 µA

Leak current between CEL-CS ICEL2

VCC=0V or OPEN

0.01 1 µA

SW1 input current

ISW1

20 30 µA

SW1 input voltage L

VL1

Charge : ON

-0.3

2.0 V

SW1 input voltage H

VH1

Charge : OFF

VCC-1.0

VCC+0.3 V

Low voltage detection voltage

LV

2.0 2.15 2.3 V

SW2 input current

ISW2

20 30 µA

SW2 input voltage L

VL2

Low voltage detection circuit: ON

-0.3

2.0 V

SW2 input voltage H

VH2

Low voltage detection circuit: OFF VCC-1.0

VCC+0.3 V

Low voltage detection

output leak current

ILV

0.5 µA

Low voltage detection

output saturation voltage

VLV

ISINK=1mA

0.2 0.4 V

EXT pin inflow current

IEXT

10 20

mA

EXT pin output voltage

VEXT

For no load

0.3

VCC-0.3 V

Note 1: Please insert a capacitor of several µF between power supply and ground when using.

Note 2: Be sure that CS pin potential does not fall below -0.5V.

Note 3: If the IC is damaged and control is no longer possible, its safety can not be guaranteed. Please

protect with something other than this IC.

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