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LT3759EMSE#TRPBF

Wide Vin Boost/SEPIC/Inverting controller, 1.6-42V input, 100kHz-1MHz, 12-MSOP-EP

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Manufacturer Part：

LT3759EMSE#TRPBF

Package：

12-lead MSOP with exposed pad (5.0 x 4.0mm)

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Description

Product Overview

The LT3759EMSE#TRPBF is a wide input voltage range Boost/SEPIC/Inverting DC/DC controller from Analog Devices (formerly Linear Technology). Operating from 1.6V to 42V input, it can regulate either positive or negative output voltages through a single feedback pin (FBX). The device drives an external N-channel MOSFET and is packaged in a 12-lead MSOP with exposed pad.

Key Specifications

Input Voltage Range 1.6V to 42V
Topology Boost / SEPIC / Inverting
Sense Threshold 50mV (accurate)
Switching Frequency 100kHz to 1MHz (programmable)
Shutdown Current Less than 1uA
Gate Drive Supply Up to 4.75V (internal LDO)
Package 12-lead MSOP with exposed pad
Operating Temperature -40 to +125C
Synchronization External clock via SYNC pin

Features

  • Wide 1.6V to 42V input voltage range
  • Single FBX pin for positive or negative output
  • PGOOD output voltage status indicator
  • Accurate 50mV current sense threshold
  • Programmable soft-start
  • Frequency foldback during short circuit
  • Programmable input UVLO with hysteresis
  • Synchronizable to external clock

Applications

  • Automotive power supplies
  • Industrial boost/SEPIC converters
  • Portable electronic equipment
  • Distributed power systems
  • Single-cell Li-Ion to 12V boost

The LT3759EMSE#TRPBF is a versatile wide input voltage range DC/DC controller from Analog Devices capable of regulating either positive or negative output voltages using a novel single feedback pin (FBX) architecture. With an input range of 1.6V to 42V, this device can be configured as a boost, SEPIC, or inverting converter, making it one of the most flexible power controller solutions available. The internal LDO regulator provides gate drive supply from either VIN or DRIVE pins, and the programmable switching frequency from 100kHz to 1MHz allows optimization for efficiency or size.

The LT3759 uses a fixed-frequency current-mode control architecture for stable operation across wide input and output voltage ranges. The unique FBX pin contains two internal error amplifiers: one for sensing positive outputs and another for negative outputs, automatically selecting the appropriate amplifier based on the feedback voltage. An external N-channel MOSFET is driven by the GATE output, and current is sensed via an external sense resistor with an accurate 50mV threshold. During output short-circuit conditions, frequency foldback reduces switching frequency to limit inductor current. The internal LDO can be powered from either VIN or DRIVE for maximum flexibility.

Pin Name Type Function
1 VC I/O Compensation pin for error amplifier
2 FBX Input Feedback pin (positive or negative)
3 SS I/O Soft-start capacitor pin
4 RT Input Frequency set resistor
5 SYNC Input External clock synchronization
6 PGOOD Output Power good indicator
7 SENSE Input Current sense input
8 GATE Output MOSFET gate drive output
9 INTVCC Power Internal LDO output
10 DRIVE Input LDO supply from external rail
11 VIN Power Input supply voltage
12 EN/UVLO Input Enable / Undervoltage lockout
  • Automotive 12V to 24V boost converters
  • Single-cell Li-Ion to 12V SEPIC supplies
  • Industrial negative rail generation
  • Distributed telecom power systems
  • Battery-powered portable equipment
Manufacturer Part Number Package Notes
ADI LT3758EMSE#TRPBF 12-MSOP-EP Similar without PGOOD
TI LM3481MM/NOPB VSSOP-10 Boost/SEPIC/Flyback controller
Microchip MCP1632T-E/MNY DFN-8 Boost controller alternative
Richtek RT8459GQW WQFN-16L SEPIC/Boost alternative
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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