LTC1871-7

PRODUCTION

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

Part Models: 4
1ku List Price: Starting From $3.51

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Part Details

Optimized for High Input Voltage Applications
Wide Chip Supply Voltage Range: 6V to 36V
Internal 7V Low Dropout Voltage Regulator Optimized for 6V-Rated MOSFETs
Current Mode Control Provides Excellent Transient Response
High Maximum Duty Cycle (92% Typ)
±2% RUN Pin Threshold with 100mV Hysteresis
±1% Internal Voltage Reference
Micropower Shutdown: I_Q = 10µA
Programmable Operating Frequency (50kHz to 1MHz) with One External Resistor
Synchronizable to an External Clock Up to 1.3 × f_OSC
User-Controlled Pulse Skip or Burst Mode^® Operation
Output Overvoltage Protection
Can be Used in a No R_SENSE^™ Mode for V_DS < 36V
Small 10-Lead MSOP Package

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.


	V_IN Range	INTV_CC	Features
LTC1871	2.5V to 36V	5.2V	-
LTC1871-1	2.5V to 36V	5.2V	Lower Burst Mode Threshold (0.195V vs. 0.3V)
LTC1871-7	6V to 36V	7V	Drives 6V Gate N-Channel MOSFETs
LTC1871X	2.5V to 36V	5.2V	175°C Junction Temp, 100% Tested at 175°C

Applications

Telecom Power Supplies
42V Automotive Systems
24V Industrial Controls
IP Phone Power Supplies

Part Models: 4
1ku List Price: Starting From $3.51

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC1871EMS-7#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC1871EMS-7#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC1871IMS-7#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC1871IMS-7#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3)
		PCN24_0004_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1871EMS-7#PBF	PRODUCTION
LTC1871EMS-7#TRPBF	PRODUCTION
LTC1871IMS-7#PBF	PRODUCTION
LTC1871IMS-7#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0130_Form Material_Report
LTC1871EMS-7#PBF	PRODUCTION
LTC1871EMS-7#TRPBF	PRODUCTION
LTC1871IMS-7#PBF	PRODUCTION
LTC1871IMS-7#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Silicon Oscillators 2
LTC6908		Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
LTC6909	PRODUCTION	1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation

Tools & Simulations

LTspice 1

LTC1871-7 Demo Circuit - High Efficiency 42V, 1.5A Automotive Boost Converter (8-28V to 42V @ 1.5A)

Models for the following parts are available in LTspice:

LTC1871
LTC1871-1
LTC1871-7

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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Part Details

Documentation

Data Sheet 1

Reliability Data 1

Design Note 2

Hardware Ecosystem

Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

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