LT1619
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LT1619

Low Voltage Current Mode PWM Controller

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Part Details
Part Models 4
1ku List Price Starting From $2.53
Features
  • Wide VIN Range: 1.9V to 18V
  • 300kHz Fixed Frequency Current Mode Control
  • 1A Rail-to-Rail N-Channel MOSFET Driver
  • Low 53mV Current Limit Threshold Voltage Improves Efficiency
  • Implements Boost, SEPIC and Flyback Converters Requiring Low Side Power Transistors
  • Internal Current Sense Amplifier with Leading Edge Blanking
  • Up to 500kHz External Synchronization
  • Burst Mode® Operation for High Efficiency at Light Load
  • 140µA Quiescent Current
  • 15µA Shutdown Current
  • 8-Lead MSOP and SO Packages
Additional Details
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The LT1619 is a fixed frequency PWM controller for implementing current mode DC/DC converters with minimum external parts. The LT1619 operates with input voltages ranging from 1.9V to 18V and is suitable for a variety of battery-powered and distributed DC/DC converters. The internal rail-to-rail N-channel MOSFET driver operates either from the input in the non-bootstrapped mode or from the output in bootstrapped operation. The driver is designed to drive a low side power transistor in boost, SEPIC, flyback and other topologies.

Converter efficiency is improved at heavy loads with a 53mV current sense voltage and at light load with Burst Mode operation. The operating frequency is internally setat 300kHz. The oscillator can also be synchronized externally up to 500kHz. No load quiescent current is 140µA and shutdown current is 15µA.

The LT1619 is available in 8-lead MSOP and SO packages.

Applications

  • 3.3V to 5V DC/DC Converters
  • Distributed Power Supplies
  • Isolated Power Supplies
Part Models 4
1ku List Price Starting From $2.53

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT1619EMS8#PBF
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Product Lifecycle

PCN

Feb 3, 2020

- 20_0128

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LT1619EMS8#PBF

PRODUCTION

LT1619EMS8#TRPBF

PRODUCTION

Dec 14, 2023

- 22_0255

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

Jun 11, 2021

- 21_0060

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LT1619ES8#PBF

PRODUCTION

LT1619ES8#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Feb 3, 2020

- 20_0128

arrow down

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LT1619EMS8#PBF

PRODUCTION

LT1619EMS8#TRPBF

PRODUCTION

Dec 14, 2023

- 22_0255

arrow down

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

Jun 11, 2021

- 21_0060

arrow down

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LT1619ES8#PBF

PRODUCTION

LT1619ES8#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Tools & Simulations

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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