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Datasheet Linear Technology LTC7821IUH#PBF

ManufacturerLinear Technology
Part NumberLTC7821IUH#PBF

Hybrid Step-Down Synchronous Controller


  • Download » Datasheet PDF, 463 Kb, File uploaded: Jan 12, 2018
    LTC7821 - Hybrid Step-Down Synchronous Controller
    Docket ↓
    Hybrid Step-Down
    Synchronous Controller
    FEATURES DESCRIPTION Wide VIN Range: 10V to 72V (80V ABS Max)
    Soft Switching for Low Noise Operation
    Phase-Lockable Fixed Frequency 200kHz to 1.5MHz
    В±1% Output Voltage Accuracy
    RSENSE or DCR Current Sensing
    Programmable CCM, DCM, or Burst ModeВ® Operation
    CLKOUT Pin for Multiphase Operation
    Short Circuit Protected
    EXTVCC Input for Improved Efficiency
    Monotonic Output Voltage Start-Up
    Optional External Reference
    32-Pin (5mm Г— 5mm) QFN APPLICATIONS n The LTCВ®7821 uses a proprietary architecture that merges
    a soft switching charge pump topology with a synchronous step-down converter to provide superior efficiency
    and EMI performance compared to traditional switching
    In a typical 48V to 12V application, efficiency of greater
    than 97% is attainable with the LTC7821 switching at
    500kHz. The same efficiency can only be achieved with a
    traditional controller switching at one-third the frequency.
    Higher switching frequencies allow the use of smaller inductances that yield faster transient response and smaller ...



Package5x5 QFN-32
Package CodeUH
Package Index05-08-1693


Demo BoardsDC2513A
Design ToolsLTspice Model
Export Controlno
Frequency1500 kHz
FunctionHybrid Step-Down Synchronous Converter
Ishutdown240 µA
Isupply0.5 mA
Number of Outputs1
Operating Temperature Range-40 to 85 °C
Output Current25 A
Vin Max72 V
Vin Min10 V

Eco Plan


Moldel Line

Series: LTC7821 (4)

Manufacturer's Classification

  • Power Management > Inductorless (Charge Pump) DC/DC Converters > Regulated Step-Down Charge Pumps
  • Power Management > Switching Regulator > Step-Down (Buck) Regulators > External Power Switch Buck Controllers | High Input Voltage Buck

Other Names:


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