Electronics ru
Advanced Search +

Datasheet Linear Technology LTC4121EUD#PBF

ManufacturerLinear Technology
Part NumberLTC4121EUD#PBF

40V 400mA Synchronous Step-Down Battery Charger


  • Download » Datasheet, PDF, 383 Kb, Revision: C
    LTC4121/LTC4121-4.2 - 40V 400mA Synchronous Step-Down Battery Charger
    Docket ↓
    40V 400mA Synchronous
    Step-Down Battery Charger
    FEATURES DESCRIPTION Wide Input Voltage Range: 4.4V to 40V
    nn Temperature Compensated Input Voltage
    Regulation for Maximum Power Point Tracking
    nn Adjustable Float Voltage 3.5V to 18V (LTC4121)
    nn Fixed 4.2V Float Voltage Option (LTC4121-4.2)
    nn High Efficiency: Up to 95%
    nn 50mA to 400mA Programmable Charge Current
    nn В±1% Feedback Voltage Accuracy
    nn Programmable 5% Accurate Charge Current
    nn Thermally Enhanced, Low Profile (0.75mm)
    16-Lead (3mm Г— 3mm) QFN Package The LTCВ®4121 is a 400mA constant-current/constantvoltage (CC/CV) synchronous step-down battery charger.
    In addition to CC/CV operation, the LTC4121 regulates its
    input voltage to a programmable percentage of the input
    open-circuit voltage. This technique maintains maximum
    power transfer with high impedance input sources such
    as solar panels. nn APPLICATIONS
    Handheld Instruments
    Solar Powered Devices
    nn Industrial/Military Sensors and Devices ...



Package3x3 QFN-16
Package CodeUD


Battery ChemistryLi-Ion, Li-Polymer, LiFePO4, Lead Acid
Buck Output Current400mA A
Charge TerminationTimer
Demo BoardsDC1977A-A,DC1977A-B
Export Controlno yes/no
FeaturesMaximum Power Point Tracking (Sampled Voc)
Float VoltageUp to 18V V
Max Charge Current0.4 A
Number of CellsUp to 18V Battery Voltage
Operating Temperature Range0 to 85 °C
Type of ChargerSwitching
Vin Max40 V
Vin Min4.4 V

Eco Plan


Moldel Line

Series: LTC4121 (4)

Manufacturer's Classification

  • Power Management > Battery Management > Battery Charger IC > Switching Battery Chargers
  • Power Management > Energy Harvesting

Other Names:


Slices ↓
Radiolocman facebook Radiolocman twitter Radiolocman google plus