FEATURES
n Wide VIN Range: 10V to 72V (80V ABS Max) n Soft Switching for Low Noise Operation n Phase-Lockable Fixed Frequency 200kHz to 1.5MHz n ±1% Output Voltage Accuracy n RSENSE or DCR Current Sensing n Programmable CCM, DCM, or Burst Mode® Operation n CLKOUT Pin for Multiphase Operation n Short Circuit Protected n EXTVCC Input for Improved Efficiency n Monotonic Output Voltage Start-Up n Optional External Reference n 32-Pin (5mm × 5mm) QFN APPLICATIONS
n Intermediate Bus Converters n High Current Distributed Power Systems n Telecom, Datacom, and Storage Systems n Automotive APPLICATIONS
DESCRIPTION
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 architectures. In a typical 48V to 12V application, efficiency of greater than 97% is attainable with the LTC7821 switching at 500kHz. Higher switching frequencies allow the use of smaller inductances that yield faster transient response and smaller solution size.
Analog Devices
