LTC3613EWKH#PBF

LTC3613 is a monolithic synchronous step-down switching regulator. The controlled on-time constant frequency valley current mode architecture allows for both fast transient response and constant frequency switching in steady-state operation, independent of VIN, VOUT and load. This also provides excellent current sharing capability. Differential output voltage sensing along with a precision internal reference combine to offer ±0.67% output regulation, even if the output ground reference deviates from local ground by 500mV. The switching frequency is also phase synchronizable to an external clock in applications where switching noise/EMI reduction is crucial. Voltage tracking soft start-up is provided for tracking and sequencing applications. Safety features include output overvoltage protection, programmable current limit with foldback, and power good monitoring. It is used in application such as distributed power system, point-of-load converters, servers etc.

• Wide VIN range is 4.5V to 24V, VOUT range is 0.6V to 5.5V at upto 15A
• 0.67% output voltage accuracy, fast transient response
• Controlled on-time valley current mode architecture, excellent current sharing capability
• RSENSE or inductor DCR current sensing with accurate current limit
• tON(MIN) is 65ns typical, tOFF(MIN) is 105ns typical
• Overvoltage protection and current limit foldback
• Power good output voltage monitor, voltage tracking start-up
• External VCC input for bypassing internal LDO
• Micropower shutdown is 15μA typical
• Operating junction temperature is -40°C to 125°C<lt/> package style is 56-lead plastic QFN

Notes

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