LTC3873 Series

No RSENSE™Constant Frequency Current Mode Boost/Flyback/SEPIC DC/DC Controller

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

No RSENSE™Constant Frequency Current Mode Boost/Flyback/SEPIC DC/DC Controller

Part	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Output Phases	Control Features	Function	Supplier Device Package	Topology	Output Configuration	Mounting Type	Output Type	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Duty Cycle (Max) [Max]	Number of Outputs
Analog Devices Inc./Maxim Integrated LTC3873ETS8#TRMPBF	60 V	8.4 V	1	Current Limit Enable Soft Start	Step-Up Step-Up/Step-Down	TSOT-23-8	Boost Flyback SEPIC	Isolation Capable Positive	Surface Mount	Transistor Driver	SOT-23-8 Thin TSOT-23-8	85 C	-40 ¯C	78 %	1
Analog Devices Inc./Maxim Integrated LTC3873EDDB#TRMPBF	60 V	8.4 V	1	Current Limit Enable Soft Start	Step-Up Step-Up/Step-Down	8-DFN (3x2)	Boost Flyback SEPIC	Isolation Capable Positive	Surface Mount	Transistor Driver	8-WFDFN Exposed Pad	85 C	-40 ¯C	78 %	1
Analog Devices Inc./Maxim Integrated LTC3873ETS8#TRPBF	60 V	8.4 V	1	Current Limit Enable Soft Start	Step-Up Step-Up/Step-Down	TSOT-23-8	Boost Flyback SEPIC	Isolation Capable Positive	Surface Mount	Transistor Driver	SOT-23-8 Thin TSOT-23-8	85 C	-40 ¯C	78 %	1
Analog Devices Inc./Maxim Integrated LTC3873EDDB#TRPBF	60 V	8.4 V	1	Current Limit Enable Soft Start	Step-Up Step-Up/Step-Down	8-DFN (3x2)	Boost Flyback SEPIC	Isolation Capable Positive	Surface Mount	Transistor Driver	8-WFDFN Exposed Pad	85 C	-40 ¯C	78 %	1

Catalog

No RSENSE™Constant Frequency Current Mode Boost/Flyback/SEPIC DC/DC Controller

Description

The LTC3873 is a constant frequency, current mode, boost, flyback or SEPIC DC/DC controller that drives an N-channel power MOSFET in high input and output voltage converter applications. Soft-start can be programmed using an external capacitor.The LTC3873 provides ±1.5% output voltage accuracy and consumes only 300μA quiescent current during normal operation and only 55μA during micropower start-up. Using a 9.3V internal shunt regulator, the LTC3873 can be powered from a high input voltage through a resistor or it can be powered directly from a low impedance DC voltage of 9V or less.The LTC3873 is available in 8-lead ThinSOT and 2mm x 3mm DFN packages.LTC3873LTC3873-5VCCUV+8.4V4.1VVCCUV–4V2.9VAPPLICATIONSTelecom Power Supplies42V and 12V Automotive Power SuppliesPortable Electronic Equipment