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See Technical Specifications

LTC1871EMS#TRPBF

Wide Input Range, No R_SENSE^™ Current Mode Boost, Flyback and SEPIC Controller

Manufacturer:

Analog Devices, Inc
Mfr.Part #:

LTC1871EMS#TRPBF
Datasheet:

LTC1871EMS#TRPBF Datasheet (PDF)
Topology:

Boost, Flyback, SEPIC
Number of Outputs:

1 Output
Switching Frequency:

50 kHz to 1 MHz
Duty Cycle - Max:

97 %
EDA/CAD Models:

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LTC1871EMS#TRPBF General Description

The LTC1871 is a wide input range, current mode, boost, flyback or SEPIC controller that drives an N-channel power MOSFET and requires very few external components. Intended for low to medium power applications, it eliminates the need for a current sense resistor by utilizing the power MOSFET’s on-resistance, thereby maximizing efficiency.

Key Features

High Efficiency (No Sense Resistor Required)
Wide Input Voltage Range: 2.5V to 36V
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
Internal 5.2V Low Dropout Voltage Regulator
Output Overvoltage Protection
Capable of Operating with a Sense Resistor for High Output Voltage Applications
Small 10-Lead MSOP Package

Application

Telecom Power Supplies
Portable Electronic Equipment

Specifications

Product Category:	Switching Controllers	Topology:	Boost, Flyback, SEPIC
Number of Outputs:	1 Output	Switching Frequency:	50 kHz to 1 MHz
Duty Cycle - Max:	97 %	Input Voltage:	2.5 V to 36 V
Output Voltage:	5.2 V	Output Current:	20 A
Minimum Operating Temperature:	- 40 C	Maximum Operating Temperature:	+ 85 C
Mounting Style:	SMD/SMT	Packaging:	Reel
Isolation:	Non-Isolated	Product:	Switching Controllers
Series:	LTC1871	Shutdown:	No Shutdown
Fall Time:	8 ns	Operating Supply Current:	0.25 mA
Operating Supply Voltage:	2.5 V to 36 V	Product Type:	Switching Controllers
Rise Time:	17 ns	Factory Pack Quantity:	2500
Subcategory:	PMIC - Power Management ICs	Tags	LTC1871EMS, LTC1871E, LTC1871, LTC187, LTC18, LTC1, LTC
Product Category	Switching Controllers	Topology	Boost, Flyback, SEPIC
Number of Outputs	1 Output	Switching Frequency	50 kHz to 1 MHz
Duty Cycle - Max	97 %	Input Voltage	2.5 V to 36 V
Output Voltage	5.2 V	Output Current	20 A
Minimum Operating Temperature	- 40 C	Maximum Operating Temperature	+ 85 C
Mounting Style	SMD/SMT	Fall Time	8 ns
Isolation	Non-Isolated	Operating Supply Current	250 uA
Operating Supply Voltage	2.5 V to 36 V	Product	Switching Controllers
Product Type	Switching Controllers	Rise Time	17 ns
Series	LTC1871	Shutdown	No Shutdown
Factory Pack Quantity	2500	Subcategory	PMIC - Power Management ICs
Unit Weight	0.022642 oz