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LT3759EMSE#PBF

Wide-input Boost/SEPIC/Inverting DC/DC controller, 1.6-42V input, 100kHz-1MHz prog. freq, current-mode, PGOOD output, MSOP-12 EP, -40C to +125C.

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Manufacturer Part：

LT3759EMSE#PBF

Package：

MSOP-12 with Exposed Pad (3.0mm width)

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Description

Product Overview

The LT3759EMSE#PBF is a wide input voltage range current-mode DC/DC controller from Analog Devices (formerly Linear Technology). Operating from 1.6 V to 42 V input, it can be configured as a Boost, SEPIC, or Inverting (Flyback) converter. A unique single FBX feedback pin programs either positive or negative output voltage. It drives an external N-channel MOSFET with an internal LDO providing up to 4.75 V gate drive. Switching frequency is programmable from 100 kHz to 1 MHz with external synchronization capability.

Key Specifications

Input Voltage 1.6 V to 42 V
Topology Boost / SEPIC / Inverting (Flyback)
Control Mode Current-mode
Switching Frequency 100 kHz to 1 MHz (external resistor)
Output Configuration Positive or negative (single FBX pin)
Sense Threshold 50 mV (precise)
Internal LDO INTVCC up to 4.75 V gate drive supply
PGOOD Active-low open-drain output
Shutdown Current <1 μA
Operating IQ 450 μA typ @ VIN = 12 V
Operating Temperature -40 °C to +125 °C
Package MSOP-12 with Exposed Pad (3.0 mm width)

Features

  • Ultra-wide 1.6 V to 42 V input range suits battery to automotive systems
  • Single FBX pin programs positive or negative output voltage
  • Programmable switching frequency with external clock synchronization
  • PGOOD output for power supply status monitoring
  • Programmable soft-start and frequency foldback for startup and short-circuit protection
  • Programmable input UVLO with hysteresis

Applications

  • Telecom and industrial Boost/SEPIC/Inverting converters
  • Distributed power systems
  • Portable electronic devices
  • Automotive power systems
  • Positive or negative output power supplies
  • 48 V telecom power

The LT3759EMSE#PBF is a wide input voltage range current-mode DC/DC controller from Analog Devices (formerly Linear Technology). It operates from 1.6V to 42V input and can be configured as Boost, SEPIC, or Inverting (Flyback) topology. A single FBX feedback pin programs positive or negative output voltage. It drives an external N-channel MOSFET with internal LDO providing up to 4.75V gate drive. Switching frequency is programmable from 100kHz to 1MHz with external sync capability. Features include PGOOD output, programmable soft-start, frequency foldback, and <1uA shutdown current.

The LT3759 uses fixed-frequency current-mode control. The error amplifier compares the FBX pin feedback with an internal reference, generating an error signal for the PWM comparator. A current-sense amplifier monitors external MOSFET current through the SENSE pin at a precise 50mV threshold for cycle-by-cycle current limiting. An internal LDO (INTVCC) powers the gate driver from VIN or DRIVE pin, supplying up to 4.75V. The FBX window comparator monitors output voltage and asserts PGOOD (active-low open-drain) when out of range. The SS pin sets startup ramp time; frequency foldback limits inductor current during output short-circuit. RT pin sets switching frequency; SYNC accepts external clock.

Pin MSOP-12 Function Description
1 SS Soft-Start External cap sets startup time
2 RT Frequency Set Resistor sets 100kHz~1MHz
3 SYNC Synchronization External clock input
4 EN/UVLO Enable / UVLO Programmable threshold with hysteresis
5 VIN Input Supply 1.6V~42V
6 INTVCC Internal LDO Output Gate drive supply; max 4.75V
7 DRIVE Drive Supply Input INTVCC source: VIN or DRIVE
8 GATE Gate Drive Output Drives external N-ch MOSFET
9 SENSE Current Sense 50mV precise threshold
10 GND Ground –
11 FBX Feedback Input Single pin for + or – output programming
12 PGOOD Power Good Active-low open-drain output
EP GND Exposed Pad Thermal and electrical GND
  • Telecom and industrial Boost/SEPIC/Inverting converters
  • Distributed power systems
  • Portable electronic devices
  • Automotive power systems
  • Positive or negative output power supplies
  • 48V telecom power
Model Type Notes
LT3759EMSE#TRPBF Same part Tape and reel packaging
LT3759IMSE#PBF Same family Industrial grade -40C~+125C
LT3757 Functional equiv. Earlier LTC boost/buck-boost controller
LT8330 Functional equiv. LTC internal-switch boost; 1A; 3-40V
LM5155 Functional equiv. TI Boost/SEPIC controller; 42V input
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All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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