MP6420 4.2-4.8V Battery Protection IC TSOT23

MP6420 4.2-4.8V Battery Protection IC TSOT23

The MP6420 provides over-charge protection that integrates a protective, open-drain MOSFET for 2- or 3-series cell Li-ion power systems.

Key Specifications

Features

• Wide VB1 Range from 3.6V to 18V
• Fixed Over-Charge Threshold from 4.2V to 4.8V
• High-Accuracy ±25mV Over-Charge Threshold
• Supports 2- and 3-Series Cells
• Fixed Delay Time from 2s to 8s
• Integrated 24V/100mΩ Protective MOSFETs
• Low Quiescent Current: 3µA
• Over-Voltage Protection (OVP) Indicator (FLAG) and PTC Interface
• External Control (CTL)
• Available in a TSOT23-8 Package

Typical Application Circuit

Applications

• Battery Packs
• Uninterruptible Power Supply (UPS)

Design Notes

• Dissipation is (VIN − VOUT) × IOUT. Check it against the package thermal resistance at the real ambient temperature before committing to the full rated current.
• Some low-noise LDOs require a minimum output capacitor ESR for loop stability — read the stability section before substituting a ceramic part.
• Add a bypass capacitor on the reference pin where provided; it sets the output noise floor.
• PSRR falls as the input-to-output differential shrinks, so headroom matters at low VIN.

Common Questions