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1-Cell Li-ion Battery Protection ICs

Ricoh's 1-cell Li-ion/polymer battery protection ICs are high accuracy devices. Not only the over-charge detector threshold, for example, the R5499 Series have a high accuracy excess discharge current detector of ±5% accuracy. Due to using external sensing resistance solution, R5480/R5486/R5494 Series can detect more precise excess charge/discharge current than conventional solution of using FET's on resistance. FET's on resistance is unstable depending on the condition such as gate voltage, temperature, and FET part number. Besides, the R5471 Series have high accuracy over-charge voltage detector with ±10mV accuracy in the temperature range from 0°C to 50°C.

Product
Name
Overcharge
Detector
Threshold [V]
(Accuracy)
Overdischarge
Detector
Threshold [V]
(Accuracy)
Excess Discharge Current
Detector Threshold [V]
(Accuracy)
Excess Charge
Current Detector
Threshold [V]
(Accuracy)
Over-current Detector Type Supply Current
[µA]
Package Download
R5405 4.0 to 4.5
(±25mV) 
2.0 to 3.0
(±2.5%) 
0.05 to 0.20
(±15mV) 
-0.2 to -0.05
(±30mV) 
FET 4.0 SOT-23-6
DFN(PLP)1616-6
DFN1814-6
Flyer
R5471 4.1 to 4.5
(±10mV)
2.0 to 3.0
(±2.5%)
0.05 to 0.13
(±10mV)
-0.17 to -0.05
(±20mV)
FET 4.0 DFN1814-6 -
R5475
R5478
4.2 to 4.5,
3.65 or 3.9
(±25mV)
1.9 to 3.0
(±2.5%)
0.05 to 0.20
(±15mV)
- FET 3.0 SOT-23-5
SOT-23-6
Datasheet
NEW
R5487
R5497
4.2 to 4.6
(±20mV)
2.0 to 3.0
(±35mV)
0.025 to 0.15
(±5mV or ±10mV)
-0.15 to -0.02
(±10% or ±5mV)
FET 3.0 DFN1814-6
DFN1414-6
Datasheet
R5492  4.0 to 4.5
(±20mV)
2.0 to 3.0
(±2.5%)
0.05 to 0.20
(±15mV)
-0.05 to -0.02
(±15mV)
FET 4.0 SOT-23-6 -
NEW
R5499
4.3 to 4.6
(±12mV)
2.0 to 3.0
(±2.5%)
0.03 to 0.085
(±5mV)
-0.15 to  -0.05
(±15mV)
FET 4.0 WLCSP-6-P4 Datasheet
R5480 4.1 to 4.5
(±20mV)
2.1 to 3.0
(±35mV)
0.030 to 0.048
(±15%)
-0.030 to -0.020
(±15%)
R 4.0 DFN(PLP)1414-6
DFN1814-6
Datasheet
R5486 4.1 to 4.5
(±20mV)
2.1 to 3.0
(±35mV)
0.015 to 0.046
(±8% or ±3.1mV)
0.03 to 0.08
(±8% or ±3.1mV)
-0.060 to -0.015
(±15% or ±3mV)
R 4.0 DFN(PLP)1414-6 Datasheet
R5494  4.1 to 4.5
(±20mV)
2.1 to 3.0
(±35mV)
0.021 to 0.048
(±10% or ±4mV)
-0.030 to -0.020
(±15%)
R 3.0 DFN1814-6 -
  • *1Topt=0°C to 50°C, Considering of variation in parameters.
    We compensate for these characteristics related to temperature by laser-trimming, however, this specifications is guaranteed by design.

TYPICAL APPLICATION

TYPICAL APPLICATION

RSENS:Over-current detector input pin
Due to using external resistance R3, R5480/R5486/R5494 Series can detect more precise excess charge/discharge current than conventional solution of using FET's on resistance. FET's on resistance is unstable depending on the condition such as gate voltage, temperature, and FET part number. (Excess current threshold of R5499 is ±5% accuracy.

  • *) *)Products built-in the RSENS pin: R5480, R5486, R5499

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