IC manufacturers Analog Devices

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Analog Devices LT3759

Wide Input Voltage Range Boost/SEPIC/Inverting Controller

Overview

TopologyBoost Converter
Input voltage1.8-4.5 V
Switching frequency100-1000 kHz
Output 15 V / 2 A
IC revisionC

Description

The LT®3759 is a wide input range, current mode, DC/DC controller which is capable of regulating either positive or negative output voltages from a single feedback pin. It can be configured as a boost, SEPIC or inverting converter.The LT3759 drives a low side external N-channel power MOSFET. An internal LDO regulator draws power from VIN or DRIVE to provide up to a 4.75V supply for the gate driver. The fixed frequency, current-mode architectureresults in stable operation over a wide range of supply and output voltages. The operating frequency of LT3759 can be set over a 100kHz to 1MHz range with an external resistor, or can be synchronized to an external clock usingthe SYNC pin.The LT3759 features soft-start and frequency foldback functions to limit inductor current during start-up and output short-circuit. A window comparator on the FBX pin reports via the PGOOD pin, providing output voltage status indication. The device is available in a 12-Lead exposed pad MSOP package

Features

  • Wide VIN Range: 1.6V to 42V
  • Positive or Negative Output Voltage Programmingwith a Single Feedback Pin
  • PGOOD Output Voltage Status Report
  • Accurate 50mV SENSE Threshold Voltage
  • Programmable Soft-Start
  • Programmable Operating Frequency (100kHz to 1MHz)with One External Resistor
  • Synchronizable to an External Clock
  • Low Shutdown Current < 1μA
  • INTVCC Regulator Supplied from VIN or DRIVE
  • Programmable Input Undervoltage Lockout withHysteresis

Typical applications

  • Distributed Power Supplies
  • Datacom and Industrial Boost, SEPIC and Inverting Converters
  • Portable Electronic Equipment
  • Automotive

Products

Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC
(mΩ)
fres
(MHz)
Material Samples
7443552200SPEC
8 files WE-HCI SMT Flat Wire High Current Inductor 2 14.8 5 13 7.3 53 WE-PERM
Order Code Data­sheet Simu­lation
7443552200SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC
(mΩ)
fres
(MHz)
Material Samples