General Description
The RT9543 Series are protection ICs for overcharge/discharge of rechargeable one-cell Lithium-ion (Li+) batteries by CMOS process.

FEATUREs
• Sustaining to 24V Charger Voltage
• Low supply current
    − Supply current: TYP. 2.0µA
    − Standby current (after detecting overdischarge): Less than 0.2µA
• High accuracy detector threshold
    − Over-charge detector: ±50mV
    − Over-discharge detector: ±2.5%
• Built-in protection circuit
    − Excess current trip/Short circuit protector in discharging path
• Output delay of over-charge adjustable with an external capacitor: 75mS at 0.01µF
• Ultra small package: SOT26

APPLICATIONs
• Over-charge / Over-discharge Protection for Li+ One-cell Pack
• High Precision Protectors for Cellular Phones or Instruments Using Li+ One-cell Battery