LTC3255 Series

Wide VINRange Fault Protected 50mA Step-Down Charge Pump

Catalog

Wide VINRange Fault Protected 50mA Step-Down Charge Pump

Part	Frequency - Switching	Output Type	Mounting Type	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Output (Min/Fixed)	Voltage - Input (Min) [Min]	Output Configuration	Package / Case	Supplier Device Package	Voltage - Output (Max) [Max]	Voltage - Input (Max) [Max]	Function	Current - Output	Package / Case
Analog Devices LTC3255MPDD#TRPBF	500 kHz	Adjustable	Surface Mount	1	-55 °C	150 °C	2.4 V	4 V	Positive	10-WFDFN Exposed Pad	10-DFN (3x3)	12.5 V	48 V	Step-Down	50 mA
Analog Devices LTC3255IMSE#TRPBF	500 kHz	Adjustable	Surface Mount	1	-55 °C	150 °C	2.4 V	4 V	Positive	10-MSOP 10-TFSOP Exposed Pad	10-MSOP-EP	12.5 V	48 V	Step-Down	50 mA	0.118 in 3 Lead
Analog Devices LTC3255MPMSE#TRPBF	500 kHz	Adjustable	Surface Mount	1	-55 °C	150 °C	2.4 V	4 V	Positive	10-MSOP 10-TFSOP Exposed Pad	10-MSOP-EP	12.5 V	48 V	Step-Down	50 mA	0.118 in 3 Lead
Analog Devices LTC3255EMSE#TRPBF	500 kHz	Adjustable	Surface Mount	1	-55 °C	150 °C	2.4 V	4 V	Positive	10-MSOP 10-TFSOP Exposed Pad	10-MSOP-EP	12.5 V	48 V	Step-Down	50 mA	0.118 in 3 Lead
Analog Devices LTC3255HDD#TRPBF	500 kHz	Adjustable	Surface Mount	1	-55 °C	150 °C	2.4 V	4 V	Positive	10-WFDFN Exposed Pad	10-DFN (3x3)	12.5 V	48 V	Step-Down	50 mA
Analog Devices LTC3255IDD#PBF	500 kHz	Adjustable	Surface Mount	1	-55 °C	150 °C	2.4 V	4 V	Positive	10-WFDFN Exposed Pad	10-DFN (3x3)	12.5 V	48 V	Step-Down	50 mA
Analog Devices LTC3255IMSE#PBF	500 kHz	Adjustable	Surface Mount	1	-55 °C	150 °C	2.4 V	4 V	Positive	10-MSOP 10-TFSOP Exposed Pad	10-MSOP-EP	12.5 V	48 V	Step-Down	50 mA	0.118 in 3 Lead
Analog Devices LTC3255IDD#TRPBF	500 kHz	Adjustable	Surface Mount	1	-55 °C	150 °C	2.4 V	4 V	Positive	10-WFDFN Exposed Pad	10-DFN (3x3)	12.5 V	48 V	Step-Down	50 mA
Analog Devices LTC3255EDD#PBF	500 kHz	Adjustable	Surface Mount	1	-55 °C	150 °C	2.4 V	4 V	Positive	10-WFDFN Exposed Pad	10-DFN (3x3)	12.5 V	48 V	Step-Down	50 mA

Catalog

Wide VINRange Fault Protected 50mA Step-Down Charge Pump

Key Features

• Input Voltage Range: 4V to 48V

• Adjustable Regulated Output: 2.4V to 12.5V

• Output Current: 50mA Maximum

• 16μA Quiescent Current in Regulation at No Load

• Input Fault Protection from –52V to 60V

• Multimode Charge Pump (2:1, 1:1) with AutomaticMode Switching Maintains Regulation Over WideVINRange

• Input Voltage Shunt Mode for Current-Fed Applications

• Power Good Output

• Overtemperature and Short-Circuit Protection

• Operating Junction Temperature: 150°C Maximum

• Thermally Enhanced 10-Lead MSOP and 10-Lead(3mm × 3mm) DFN packages

Description

The LTC3255 is a switched-capacitor step-down DC/DC converter that produces a regulated output (2.4V to 12.5V adjustable) from a 4V to 48V input. 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. At no load, Burst Mode®operation cuts VINquiescent current to 16μA.With its integrated VINshunt regulator, the LTC3255 excels in 4mA to 20mA current loop applications. The device enables current multiplication; a 4mA input current can power a 7.4mA load continuously. Alternatively, the LTC3255 serves as a higher efficiency replacement for linear regulators and provides a space-saving inductorfree alternative to buck DC/DC converters.The LTC3255 withstands reverse-polarity input supplies and output short-circuits without damage. Safety features including current limit and overtemperature protection further enhance robustness. The LTC3255 is available in thermally enhanced 10-lead MSOP and low profile 3mm × 3mm 10-lead DFN packages.ApplicationsIndustrial Control, Factory Automation, Sensors, and SCADA SystemsHousekeeping Power SuppliesCurrent-Boosting Voltage Regulators for 4mA to 20mA Current Loops