Datasheet Linear Technology LTC7821 Hybrid Step-Down Synchronous Controller Datasheets- Download » Datasheet, PDF, 463 Kb, File uploaded 01-12-2018
LTC7821 - Hybrid Step-Down Synchronous Controller Docket ↓LTC7821 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 architectures. 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 ...
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PackagingParametrics | LTC7821EUH#PBF | LTC7821EUH#TRPBF | LTC7821IUH#PBF | LTC7821IUH#TRPBF |
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Demo Boards | DC2513A | DC2513A | DC2513A | DC2513A |
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Design Tools | LTspice Model | LTspice Model | LTspice Model | LTspice Model |
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Export Control | no | no | no | no |
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Frequency, kHz | 1500 | 1500 | 1500 | 1500 |
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Function | Hybrid Step-Down Synchronous Converter | Hybrid Step-Down Synchronous Converter | Hybrid Step-Down Synchronous Converter | Hybrid Step-Down Synchronous Converter |
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Ishutdown, µA | 240 | 240 | 240 | 240 |
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Isupply, mA | 0.5 | 0.5 | 0.5 | 0.5 |
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Number of Outputs | 1 | 1 | 1 | 1 |
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Operating Temperature Range, °C | 0 to 85 | 0 to 85 | -40 to 85 | -40 to 85 |
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Output Current, A | 25 | 25 | 25 | 25 |
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Vin Max, V | 72 | 72 | 72 | 72 |
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Vin Min, V | 10 | 10 | 10 | 10 |
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Eco PlanMoldel LineSeries: 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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