Skip to main content Skip to first level navigation
Skip to main content First level navigation Menu
Contact Us About Us
Facebook (Open link in new window) YouTube (Open link in new window) LinkedIn (Open link in new window) E-mail Newsletter
Main content
Main content

R5443 Series

1-Cell Li-ion Battery Protection IC

  • RoHS

The R5443 is a one-cell Li-ion / polymer battery protection IC provides overcharge, overdischarge, and discharge / charge overcurrent detections. One of the features of this device is a high-accuracy detection at overcharge and overcurrent. The supply current after overdischarge detection can be reduced to a minimum by stopping the internal circuits. The small WLCSP package is available.

Specs & Datasheets

Operating Input Voltage 1.5 V to 5.0 V (Maximum Rating: 12 V)
Number of Cells 1
Supply Current Typ. 2.5 µA
Standby Current Typ. 0.04 µA
Overcharge Detection Voltage 4.2 V to 4.6 V (0.005 V step)
Overcharge Detection Voltage Accuracy ±10 mV (0°C ≤ Ta ≤ 50°C)
Overcharge Detection Delay Time 1.0 s
Overdischarge Detection Voltage 2.0 V to 3.4 V (0.050 V step)
Overdischarge Detection Voltage Accuracy ±2.0%
Overdischarge Detection Delay Time 16 ms, 32 ms, 128 ms
Discharge Overcurrent Detection Voltage 0.015 V to 0.150 V
(0.015 V to 0.050 V: 0.001 V step)
(0.050 V to 0.150 V: 0.005 V step)
Discharge Overcurrent Detection Voltage Accuracy ±3 mV (0.015 V to 0.030 V)
±10% (0.030 V to 0.050 V)
±5 mV (0.050 V to 0.150 V)
Discharge Overcurrent Detection Delay Time 8 ms, 16 ms, 32 ms, 128 ms, 512 ms
Charge Overcurrent Detection Voltage -0.150 V to -0.015 V
(-0.030 V to -0.015 V: 0.001 V step)
(-0.150 V to -0.030 V: 0.005 V step)
Charge Overcurrent Detection Voltage Accuracy ±4 mV (-0.020 V to -0.015 V)
±20% (-0.040 V to -0.020 V)
±8 mV (-0.150 V to -0.040 V)
Charge Overcurrent Detection Delay Time 8 ms
Short Detection Voltage 0.040 V to 0.300 V (5 mV step)
Short Detection Voltage Accuracy ±5 mV
Short Detection Delay Time 280 µs
Conditions for Overcharge Restoration Latch
Conditions for Overdischarge Restoration Latch
Package WLCSP-6-P7
0 V Charge Optional

Download Datasheet

Protections / Functions

Functional Description

Temperature Protection Reset Alarm Cell Balance Cascadable Open Wire Detection Wakeup Short-circuit Current Detection Delay Time Shortening

Technical Documents

Typical Application

Typical Application

Quality & Packages

Product Name Compatibility Package Marking Reliability
  • gradeConsumerC
WLCSP-6-P7 R5443Z R5443Z-F

Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.

Sample / Buy

Functional Description

Temperature Protection Temperature Protection
Reset Reset Function
Alarm Alarm Function
Cell Balance Cell Balance Function
Cascadable Cascade Connect Function
Open Wire Detection Open Wire Detect Function
Wakeup Wakeup Function
Short-circuit Current Detection Short-circuit Current Protection
Delay Time Shorting Output Delay Time Short Function

For more details, please refer to "Externally Configurable Protections and Their Advantages".

Search for similar products under conditions below.

Category:Lithium-ion Battery Protection ICs

Features Battery Protection
Cell 1
Functions Short-circuit Current Detection,Delay Time Shortening