LTC1871IMS-7#PBF

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Analog Devices Inc./Maxim Integrated

HIGH INPUT VOLTAGE, CURRENT MODE BOOST, FLYBACK AND SEPIC CONTROLLER

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LTC1871IMS-7#PBF

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Analog Devices Inc./Maxim Integrated

HIGH INPUT VOLTAGE, CURRENT MODE BOOST, FLYBACK AND SEPIC CONTROLLER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC1871-7 Series

The LTC1871-7 is a current mode, boost, flyback and SEPIC controller optimized for driving 6V-rated MOSFETs in high voltage applications. The LTC1871-7 works equally well in low or high power applications and requires few components to provide a complete power supply solution. The switching frequency can be set with an external resistor over a 50kHz to 1MHz range, and can be synchronized to an external clock using the MODE/SYNC pin. Burst Mode operation at light loads, a low minimum operating supply voltage of 6V and a low shutdown quiescent current of 10µA make the LTC1871-7 well suited for battery-operated systems. For applications requiring constant frequency operation, Burst Mode operation can be defeated using the MODE/SYNC pin. The LTC1871-7 is available in the 10-lead MSOP package.VINRangeINTVCCFeaturesLTC18712.5V to 36V5.2V-LTC1871-12.5V to 36V5.2VLower Burst Mode Threshold (0.195V vs. 0.3V)LTC1871-76V to 36V7VDrives 6V Gate N-Channel MOSFETsLTC1871X2.5V to 36V5.2V175°C Junction Temp, 100% Tested at 175°CApplicationsTelecom Power Supplies42V Automotive Systems24V Industrial ControlsIP Phone Power Supplies

Technical Specifications

Parameters and characteristics for this part

Specification	LTC1871IMS-7#PBF

Clock Sync	Yes
Control Features	Enable, Frequency Control
Duty Cycle (Max)	92 %
Frequency - Switching (Max)	1 MHz
Frequency - Switching (Min)	50 kHz
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
Output Phases	1
Output Type	Transistor Driver
Package Length	0.118 in
Package Name	10-TFSOP, 10-MSOP
Package Width	3 mm
Synchronous Rectifier	No
Topology	SEPIC, Flyback, Boost
Voltage - Supply (Vcc/Vdd) Maximum	36 V
Voltage - Supply (Vcc/Vdd) Minimum	6 V

LTC1871-7 Series

High Input Voltage, Current Mode Boost, Flyback and SEPIC Controller

Part	Operating Temperature (Max)	Operating Temperature (Min)	Output Type	Output Phases	Frequency - Switching (Min)	Frequency - Switching (Max)	Clock Sync	Function	Number of Outputs	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Package Length	Package Name	Package Width	Output Configuration	Synchronous Rectifier	Control Features	Topology	Duty Cycle (Max)	Mounting Type
Analog Devices Inc./Maxim Integrated LTC1871IMS-7#PBF	125 °C	-40 °C	Transistor Driver	1	50 kHz	1 MHz	Yes	Step-Up Step-Up/Step-Down	1	6 V	36 V	0.118 in	10-MSOP 10-TFSOP	3 mm	Positive	No	Enable Frequency Control	Boost Flyback SEPIC	92 %	Surface Mount
Analog Devices Inc./Maxim Integrated LTC1871IMS-7#TRPBF	125 °C	-40 °C	Transistor Driver	1	50 kHz	1 MHz	Yes	Step-Up Step-Up/Step-Down	1	6 V	36 V	0.118 in	10-MSOP 10-TFSOP	3 mm	Positive	No	Enable Frequency Control	Boost Flyback SEPIC	92 %	Surface Mount
Analog Devices Inc./Maxim Integrated LTC1871EMS-7#PBF	85 °C	-40 °C	Transistor Driver	1	50 kHz	1 MHz	Yes	Step-Up Step-Up/Step-Down	1	6 V	36 V	0.118 in	10-MSOP 10-TFSOP	3 mm	Positive	No	Enable Frequency Control	Boost Flyback SEPIC	92 %	Surface Mount

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC1871IMS-7#PBF | Datasheet

R384 Reliability Data