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Datasheet Linear Technology LTC7821

Hybrid Step-Down Synchronous Controller

Datasheets

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  LTC7821 - Hybrid Step-Down Synchronous Controller
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  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 ...

Prices

Packaging

Parametrics

	LTC7821EUH#PBF	LTC7821EUH#TRPBF	LTC7821IUH#PBF	LTC7821IUH#TRPBF
Demo Boards	DC2513A	DC2513A	DC2513A	DC2513A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no
Frequency, kHz	1500	1500	1500	1500
Function	Hybrid Step-Down Synchronous Converter	Hybrid Step-Down Synchronous Converter	Hybrid Step-Down Synchronous Converter	Hybrid Step-Down Synchronous Converter
Ishutdown, µA	240	240	240	240
Isupply, mA	0.5	0.5	0.5	0.5
Number of Outputs	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
Output Current, A	25	25	25	25
Vin Max, V	72	72	72	72
Vin Min, V	10	10	10	10

Eco Plan

Moldel Line

• LTC7821EUH#PBF LTC7821EUH#TRPBF LTC7821IUH#PBF LTC7821IUH#TRPBF

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