LTC3873ITS8-5#TRPBF

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Analog Devices Inc./Maxim Integrated

NO RSENSE™CONSTANT FREQUENCY CURRENT MODE BOOST/FLYBACK/SEPIC DC/DC CONTROLLER

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LTC3873ITS8-5#TRPBF

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Analog Devices Inc./Maxim Integrated

NO RSENSE™CONSTANT FREQUENCY CURRENT MODE BOOST/FLYBACK/SEPIC DC/DC CONTROLLER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3873-5 Series

The LTC3873-5 is a constant frequency current mode controller for boost, flyback or SEPIC DC/DC converters designed to drive an N-channel MOSFET for high input and output voltage converter applications.The LTC3873-5 provides ±1.5% output voltage accuracy and consumes only 300μA quiescent current during normal operation and only 50μA during micropower start-up. Using a 9.3V internal shunt regulator, the LTC3873-5 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. Soft-start can be programmed using an external capacitor.The LTC3873-5 is available in 8-lead ThinSOT and 2mm × 3mm DFN packages.LTC3873LTC3873-5VCCUV+8.4V3.9VVCCUV–4V2.9VApplicationsTelecom Power SuppliesAutomotive Power SuppliesPoE Applications

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3873ITS8-5#TRPBF

Clock Sync	No
Control Features	Enable, Soft Start, Current Limit
Duty Cycle (Max)	78 %
Function	Step-Up, Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive, Isolation Capable
Output Phases	1
Output Type	Transistor Driver
Package / Case	TSOT-23-8, SOT-23-8 Thin
Package Name	TSOT-23-8
Synchronous Rectifier	No
Topology	SEPIC, Flyback, Boost
Voltage - Supply (Vcc/Vdd) Maximum	60 V
Voltage - Supply (Vcc/Vdd) Minimum	4.1 V

LTC3873-5 Series

Part	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Control Features	Synchronous Rectifier	Output Type	Clock Sync	Duty Cycle (Max)	Mounting Type	Package Name	Topology	Operating Temperature (Max)	Operating Temperature (Min)	Number of Outputs	Output Phases	Output Configuration	Function	Package / Case	Package Width	Package Length
Analog Devices Inc./Maxim Integrated LTC3873ITS8-5#TRPBF	4.1 V	60 V	Current Limit Enable Soft Start	No	Transistor Driver	No	78 %	Surface Mount	TSOT-23-8	Boost Flyback SEPIC	125 °C	-40 °C	1	1	Isolation Capable Positive	Step-Up Step-Up/Step-Down	SOT-23-8 Thin TSOT-23-8
Analog Devices Inc./Maxim Integrated LTC3873ETS8-5#TRPBF	4.1 V	60 V	Current Limit Enable Soft Start	No	Transistor Driver	No	78 %	Surface Mount	TSOT-23-8	Boost Flyback SEPIC	85 °C	-40 °C	1	1	Isolation Capable Positive	Step-Up Step-Up/Step-Down	SOT-23-8 Thin TSOT-23-8
Analog Devices Inc./Maxim Integrated LTC3873IDDB-5#TRPBF	4.1 V	60 V	Current Limit Enable Soft Start	No	Transistor Driver	No	78 %	Surface Mount	8-DFN	Boost Flyback SEPIC	125 °C	-40 °C	1	1	Isolation Capable Positive	Step-Up Step-Up/Step-Down	8-WFDFN Exposed Pad	2 mm	3 mm
Analog Devices Inc./Maxim Integrated LTC3873EDDB-5#TRMPBF	4.1 V	60 V	Current Limit Enable Soft Start	No	Transistor Driver	No	78 %	Surface Mount	8-DFN	Boost Flyback SEPIC	85 °C	-40 °C	1	1	Isolation Capable Positive	Step-Up Step-Up/Step-Down	8-WFDFN Exposed Pad	2 mm	3 mm
Analog Devices Inc./Maxim Integrated LTC3873ETS8-5#TRMPBF	4.1 V	60 V	Current Limit Enable Soft Start	No	Transistor Driver	No	78 %	Surface Mount	TSOT-23-8	Boost Flyback SEPIC	85 °C	-40 °C	1	1	Isolation Capable Positive	Step-Up Step-Up/Step-Down	SOT-23-8 Thin TSOT-23-8
Analog Devices Inc./Maxim Integrated LTC3873IDDB-5#TRMPBF	4.1 V	60 V	Current Limit Enable Soft Start	No	Transistor Driver	No	78 %	Surface Mount	8-DFN	Boost Flyback SEPIC	125 °C	-40 °C	1	1	Isolation Capable Positive	Step-Up Step-Up/Step-Down	8-WFDFN Exposed Pad	2 mm	3 mm
Analog Devices Inc./Maxim Integrated LTC3873ITS8-5#TRMPBF	4.1 V	60 V	Current Limit Enable Soft Start	No	Transistor Driver	No	78 %	Surface Mount	TSOT-23-8	Boost Flyback SEPIC	125 °C	-40 °C	1	1	Isolation Capable Positive	Step-Up Step-Up/Step-Down	SOT-23-8 Thin TSOT-23-8
Analog Devices Inc./Maxim Integrated LTC3873EDDB-5#TRPBF	4.1 V	60 V	Current Limit Enable Soft Start	No	Transistor Driver	No	78 %	Surface Mount	8-DFN	Boost Flyback SEPIC	85 °C	-40 °C	1	1	Isolation Capable Positive	Step-Up Step-Up/Step-Down	8-WFDFN Exposed Pad	2 mm	3 mm

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R421 Reliability Data

LTC3873ITS8-5#TRPBF | Datasheet

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