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Datasheet Linear Technology LTC7821

ManufacturerLinear Technology

Hybrid Step-Down Synchronous Controller


  • Download » Datasheet, PDF, 463 Kb, Revision: F
    LTC7821 - Hybrid Step-Down Synchronous Controller
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    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
    ±1% Output Voltage Accuracy
    RSENSE or DCR Current Sensing
    Programmable CCM, DCM, or Burst Mode® 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 × 5mm) QFN APPLICATIONS n The LTC®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-325x5 QFN-325x5 QFN-325x5 QFN-32
Package CodeUHUHUHUH


Demo BoardsDC2513ADC2513ADC2513ADC2513A
Export Control, yes/nonononono
Frequency, kHz1500150015001500
FunctionHybrid Step-Down Synchronous ConverterHybrid Step-Down Synchronous ConverterHybrid Step-Down Synchronous ConverterHybrid Step-Down Synchronous Converter
Ishutdown, A240240240240
Isupply, mA0.
Number of Outputs1111
Operating Temperature Range, °C0 to 850 to 85-40 to 850 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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