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Datasheet Linear Technology LTC7821

ManufacturerLinear Technology

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 ...




Demo BoardsDC2513ADC2513ADC2513ADC2513A
Design ToolsLTspice ModelLTspice ModelLTspice ModelLTspice Model
Export Controlnononono
Frequency, kHz1500150015001500
FunctionHybrid Step-Down Synchronous ConverterHybrid Step-Down Synchronous ConverterHybrid Step-Down Synchronous ConverterHybrid Step-Down Synchronous Converter
Ishutdown, µA240240240240
Isupply, mA0.
Number of Outputs1111
Operating Temperature Range, °C0 to 850 to 85-40 to 85-40 to 85
Output Current, A25252525
Vin Max, V72727272
Vin Min, V10101010

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

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