LTC3255IDD#PBF

LTC3255 is a switched-capacitor step-down DC/DC converter. In applications where the input voltage exceeds twice the output voltage, 2:1 capacitive charge pumping extends output current capability beyond input supply current limits. With its integrated VIN shunt regulator, it excels in 4mA to 20mA current loop applications. This device enables current multiplication; a 4mA input current can power a 7.4mA load continuously. Alternatively, this device serves as a higher efficiency replacement for linear regulators and provides a space-saving inductor free alternative to buck DC/DC converters. It withstands reverse-polarity input supplies and output short-circuits without damage. Safety features including current limit and overtemperature protection further enhance robustness. It is used in application such as industrial control, factory automation, sensors, and SCADA systems, housekeeping power supplies, current-boosting voltage regulators for 4mA to 20mA current loops etc.

• Input voltage range is 4V to 48V
• Output voltage range is 2.4V to 12.5V
• Quiescent current is 16µA typical at (enabled, output in regulation)
• Input voltage shunt mode for current-fed applications
• Power good output
• Oscillator frequency is 500KHz typical
• Regulated feedback voltage is 1.2V typical
• Operating temperature is -40°C to 125°C
• Package style is 10-lead plastic DFN

注释

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